From 813b76e29dfd4e56f1545e5e16903281b1333151 Mon Sep 17 00:00:00 2001
From: 30secondsofcode <30secondsofcode@gmail.com>
Date: Thu, 4 Jan 2018 20:03:44 +0000
Subject: [PATCH 01/14] Travis build: 1032 [cron]

---
 dist/_30s.es5.js     | 110 +++++++++++++++++++++++++++++++++----------
 dist/_30s.es5.min.js |   2 +-
 dist/_30s.esm.js     |  68 ++++++++++++++++++++------
 dist/_30s.js         |  68 ++++++++++++++++++++------
 dist/_30s.min.js     |   2 +-
 5 files changed, 192 insertions(+), 58 deletions(-)

diff --git a/dist/_30s.es5.js b/dist/_30s.es5.js
index 32221cc96..34ebd5516 100644
--- a/dist/_30s.es5.js
+++ b/dist/_30s.es5.js
@@ -248,9 +248,9 @@ var difference = function difference(a, b) {
 
 var differenceWith = function differenceWith(arr, val, comp) {
   return arr.filter(function (a) {
-    return !val.find(function (b) {
+    return val.findIndex(function (b) {
       return comp(a, b);
-    });
+    }) === -1;
   });
 };
 
@@ -301,20 +301,43 @@ var elementIsVisibleInViewport = function elementIsVisibleInViewport(el) {
 
 var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();
 
+function _toArray$1(arr) { return Array.isArray(arr) ? arr : Array.from(arr); }
+
 var elo = function elo(_ref) {
-  var _ref2 = _slicedToArray(_ref, 2),
-      a = _ref2[0],
-      b = _ref2[1];
+  var _ref2 = _toArray$1(_ref),
+      ratings = _ref2.slice(0);
 
   var kFactor = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 32;
+  var selfRating = arguments[2];
+
+  var _ratings = _slicedToArray(ratings, 2),
+      a = _ratings[0],
+      b = _ratings[1];
 
   var expectedScore = function expectedScore(self, opponent) {
     return 1 / (1 + Math.pow(10, (opponent - self) / 400));
   };
   var newRating = function newRating(rating, i) {
-    return rating + kFactor * (i - expectedScore(i ? a : b, i ? b : a));
+    return (selfRating || rating) + kFactor * (i - expectedScore(i ? a : b, i ? b : a));
   };
-  return [newRating(a, 1), newRating(b, 0)];
+  if (ratings.length === 2) {
+    return [newRating(a, 1), newRating(b, 0)];
+  } else {
+    for (var i = 0; i < ratings.length; i++) {
+      var j = i;
+      while (j < ratings.length - 1) {
+        var _elo = elo([ratings[i], ratings[j + 1]], kFactor);
+
+        var _elo2 = _slicedToArray(_elo, 2);
+
+        ratings[i] = _elo2[0];
+        ratings[j + 1] = _elo2[1];
+
+        j++;
+      }
+    }
+  }
+  return ratings;
 };
 
 var escapeHTML = function escapeHTML(str) {
@@ -425,6 +448,22 @@ var flip = function flip(fn) {
   };
 };
 
+var formatDuration = function formatDuration(ms) {
+  if (ms < 0) ms = -ms;
+  var time = {
+    day: Math.floor(ms / 86400000),
+    hour: Math.floor(ms / 3600000) % 24,
+    minute: Math.floor(ms / 60000) % 60,
+    second: Math.floor(ms / 1000) % 60,
+    millisecond: Math.floor(ms) % 1000
+  };
+  return Object.entries(time).filter(function (val) {
+    return val[1] !== 0;
+  }).map(function (val) {
+    return val[1] + ' ' + (val[1] !== 1 ? val[0] + 's' : val[0]);
+  }).join(', ');
+};
+
 var fromCamelCase = function fromCamelCase(str) {
   var separator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '_';
   return str.replace(/([a-z\d])([A-Z])/g, '$1' + separator + '$2').replace(/([A-Z]+)([A-Z][a-z\d]+)/g, '$1' + separator + '$2').toLowerCase();
@@ -437,12 +476,11 @@ var functionName = function functionName(fn) {
 var gcd = function gcd() {
   var _ref;
 
-  var data = (_ref = []).concat.apply(_ref, arguments);
-  var helperGcd = function helperGcd(x, y) {
+  var _gcd = function _gcd(x, y) {
     return !y ? x : gcd(y, x % y);
   };
-  return data.reduce(function (a, b) {
-    return helperGcd(a, b);
+  return (_ref = []).concat.apply(_ref, arguments).reduce(function (a, b) {
+    return _gcd(a, b);
   });
 };
 
@@ -633,7 +671,7 @@ var isEven = function isEven(num) {
 };
 
 var isFunction = function isFunction(val) {
-  return val && typeof val === 'function';
+  return typeof val === 'function';
 };
 
 var isNull = function isNull(val) {
@@ -754,6 +792,18 @@ var lowercaseKeys = function lowercaseKeys(obj) {
   }, {});
 };
 
+var luhnCheck = function luhnCheck(num) {
+  var arr = (num + '').split('').reverse().map(function (x) {
+    return parseInt(x);
+  });
+  var lastDigit = arr.splice(0, 1)[0];
+  var sum = arr.reduce(function (acc, val, i) {
+    return i % 2 !== 0 ? acc + val : acc + val * 2 % 9 || 9;
+  }, 0);
+  sum += lastDigit;
+  return sum % 10 === 0;
+};
+
 var mapObject = function mapObject(arr, fn) {
   return function (a) {
     return a = [arr, arr.map(fn)], a[0].reduce(function (acc, val, ind) {
@@ -905,11 +955,19 @@ var pipeFunctions = function pipeFunctions() {
   });
 };
 
-var pluralize = function pluralize(num, item) {
-  var items = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : item + 's';
-  return num <= 0 ? function () {
-    throw new Error('\'num\' should be >= 1. Value povided was ' + num + '.');
-  }() : num === 1 ? item : items;
+var _typeof$3 = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+var pluralize = function pluralize(val, word) {
+  var plural = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : word + 's';
+
+  var _pluralize = function _pluralize(num, word) {
+    var plural = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : word + 's';
+    return [1, -1].includes(Number(num)) ? word : plural;
+  };
+  if ((typeof val === 'undefined' ? 'undefined' : _typeof$3(val)) === 'object') return function (num, word) {
+    return _pluralize(num, word, val[word]);
+  };
+  return _pluralize(val, word, plural);
 };
 
 var powerset = function powerset(arr) {
@@ -1007,10 +1065,10 @@ var pullAtValue = function pullAtValue(arr, pullArr) {
 
 function _toConsumableArray$10(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
 
-function _toArray$1(arr) { return Array.isArray(arr) ? arr : Array.from(arr); }
+function _toArray$2(arr) { return Array.isArray(arr) ? arr : Array.from(arr); }
 
 var quickSort = function quickSort(_ref, desc) {
-  var _ref2 = _toArray$1(_ref),
+  var _ref2 = _toArray$2(_ref),
       n = _ref2[0],
       nums = _ref2.slice(1);
 
@@ -1103,10 +1161,10 @@ var sample = function sample(arr) {
   return arr[Math.floor(Math.random() * arr.length)];
 };
 
-function _toArray$2(arr) { return Array.isArray(arr) ? arr : Array.from(arr); }
+function _toArray$3(arr) { return Array.isArray(arr) ? arr : Array.from(arr); }
 
 var sampleSize = function sampleSize(_ref) {
-  var _ref2 = _toArray$2(_ref),
+  var _ref2 = _toArray$3(_ref),
       arr = _ref2.slice(0);
 
   var n = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 1;
@@ -1160,10 +1218,10 @@ var show = function show() {
   });
 };
 
-function _toArray$3(arr) { return Array.isArray(arr) ? arr : Array.from(arr); }
+function _toArray$4(arr) { return Array.isArray(arr) ? arr : Array.from(arr); }
 
 var shuffle = function shuffle(_ref) {
-  var _ref2 = _toArray$3(_ref),
+  var _ref2 = _toArray$4(_ref),
       arr = _ref2.slice(0);
 
   var m = arr.length;
@@ -1182,10 +1240,10 @@ var similarity = function similarity(arr, values) {
   });
 };
 
-var _typeof$3 = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+var _typeof$4 = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
 
 var size = function size(value) {
-  return Array.isArray(value) ? value.length : value && (typeof value === 'undefined' ? 'undefined' : _typeof$3(value)) === 'object' ? value.size || value.length || Object.keys(value).length : typeof value === 'string' ? new Blob([value]).size : 0;
+  return Array.isArray(value) ? value.length : value && (typeof value === 'undefined' ? 'undefined' : _typeof$4(value)) === 'object' ? value.size || value.length || Object.keys(value).length : typeof value === 'string' ? new Blob([value]).size : 0;
 };
 
 var sleep = function sleep(ms) {
@@ -1456,7 +1514,7 @@ var zipObject = function zipObject(props, values) {
   }, {});
 };
 
-var imports = { JSONToDate: JSONToDate, JSONToFile: JSONToFile, RGBToHex: RGBToHex, UUIDGeneratorBrowser: UUIDGeneratorBrowser, UUIDGeneratorNode: UUIDGeneratorNode, anagrams: anagrams, arrayToHtmlList: arrayToHtmlList, average: average, bottomVisible: bottomVisible, byteSize: byteSize, call: call, capitalize: capitalize, capitalizeEveryWord: capitalizeEveryWord, chainAsync: chainAsync, chunk: chunk, clampNumber: clampNumber, cleanObj: cleanObj, cloneRegExp: cloneRegExp, coalesce: coalesce, coalesceFactory: coalesceFactory, collatz: collatz, collectInto: collectInto, compact: compact, compose: compose, copyToClipboard: copyToClipboard, countOccurrences: countOccurrences, countVowels: countVowels, currentURL: currentURL, curry: curry, deepFlatten: deepFlatten, defer: defer, detectDeviceType: detectDeviceType, difference: difference, differenceWith: differenceWith, digitize: digitize, distance: distance, distinctValuesOfArray: distinctValuesOfArray, dropElements: dropElements, dropRight: dropRight, elementIsVisibleInViewport: elementIsVisibleInViewport, elo: elo, escapeHTML: escapeHTML, escapeRegExp: escapeRegExp, everyNth: everyNth, extendHex: extendHex, factorial: factorial, factors: factors, fibonacci: fibonacci, fibonacciCountUntilNum: fibonacciCountUntilNum, fibonacciUntilNum: fibonacciUntilNum, filterNonUnique: filterNonUnique, flatten: flatten, flattenDepth: flattenDepth, flip: flip, fromCamelCase: fromCamelCase, functionName: functionName, gcd: gcd, geometricProgression: geometricProgression, getDaysDiffBetweenDates: getDaysDiffBetweenDates, getScrollPosition: getScrollPosition, getStyle: getStyle, getType: getType, getURLParameters: getURLParameters, groupBy: groupBy, hammingDistance: hammingDistance, hasClass: hasClass, hasFlags: hasFlags, head: head, hexToRGB: hexToRGB, hide: hide, howManyTimes: howManyTimes, httpsRedirect: httpsRedirect, inRange: inRange, initial: initial, initialize2DArray: initialize2DArray, initializeArrayWithRange: initializeArrayWithRange, initializeArrayWithValues: initializeArrayWithValues, intersection: intersection, invertKeyValues: invertKeyValues, isAbsoluteURL: isAbsoluteURL, isArmstrongNumber: isArmstrongNumber, isArray: isArray, isArrayLike: isArrayLike, isBoolean: isBoolean, isDivisible: isDivisible, isEven: isEven, isFunction: isFunction, isNull: isNull, isNumber: isNumber, isPrime: isPrime, isPrimitive: isPrimitive, isPromiseLike: isPromiseLike, isSorted: isSorted, isString: isString, isSymbol: isSymbol, isTravisCI: isTravisCI, isValidJSON: isValidJSON, join: join, last: last, lcm: lcm, lowercaseKeys: lowercaseKeys, mapObject: mapObject, mask: mask, maxN: maxN, median: median, memoize: memoize, minN: minN, negate: negate, nthElement: nthElement, objectFromPairs: objectFromPairs, objectToPairs: objectToPairs, onUserInputChange: onUserInputChange, once: once, orderBy: orderBy, palindrome: palindrome, percentile: percentile, pick: pick, pipeFunctions: pipeFunctions, pluralize: pluralize, powerset: powerset, prettyBytes: prettyBytes, primes: primes, promisify: promisify, pull: pull, pullAtIndex: pullAtIndex, pullAtValue: pullAtValue, quickSort: quickSort, randomHexColorCode: randomHexColorCode, randomIntegerInRange: randomIntegerInRange, randomNumberInRange: randomNumberInRange, readFileLines: readFileLines, redirect: redirect, reducedFilter: reducedFilter, remove: remove, repeatString: repeatString, reverseString: reverseString, round: round, runAsync: runAsync, runPromisesInSeries: runPromisesInSeries, sample: sample, sampleSize: sampleSize, scrollToTop: scrollToTop, sdbm: sdbm, select: select, setStyle: setStyle, shallowClone: shallowClone, show: show, shuffle: shuffle, similarity: similarity, size: size, sleep: sleep, solveRPN: solveRPN, sortCharactersInString: sortCharactersInString, sortedIndex: sortedIndex, speechSynthesis: speechSynthesis, splitLines: splitLines, spreadOver: spreadOver, standardDeviation: standardDeviation, sum: sum, sumPower: sumPower, symmetricDifference: symmetricDifference, tail: tail, take: take, takeRight: takeRight, timeTaken: timeTaken, toCamelCase: toCamelCase, toDecimalMark: toDecimalMark, toEnglishDate: toEnglishDate, toKebabCase: toKebabCase, toOrdinalSuffix: toOrdinalSuffix, toSnakeCase: toSnakeCase, toggleClass: toggleClass, tomorrow: tomorrow, truncateString: truncateString, truthCheckCollection: truthCheckCollection, unescapeHTML: unescapeHTML, union: union, untildify: untildify, validateNumber: validateNumber, without: without, words: words, yesNo: yesNo, zip: zip, zipObject: zipObject };
+var imports = { JSONToDate: JSONToDate, JSONToFile: JSONToFile, RGBToHex: RGBToHex, UUIDGeneratorBrowser: UUIDGeneratorBrowser, UUIDGeneratorNode: UUIDGeneratorNode, anagrams: anagrams, arrayToHtmlList: arrayToHtmlList, average: average, bottomVisible: bottomVisible, byteSize: byteSize, call: call, capitalize: capitalize, capitalizeEveryWord: capitalizeEveryWord, chainAsync: chainAsync, chunk: chunk, clampNumber: clampNumber, cleanObj: cleanObj, cloneRegExp: cloneRegExp, coalesce: coalesce, coalesceFactory: coalesceFactory, collatz: collatz, collectInto: collectInto, compact: compact, compose: compose, copyToClipboard: copyToClipboard, countOccurrences: countOccurrences, countVowels: countVowels, currentURL: currentURL, curry: curry, deepFlatten: deepFlatten, defer: defer, detectDeviceType: detectDeviceType, difference: difference, differenceWith: differenceWith, digitize: digitize, distance: distance, distinctValuesOfArray: distinctValuesOfArray, dropElements: dropElements, dropRight: dropRight, elementIsVisibleInViewport: elementIsVisibleInViewport, elo: elo, escapeHTML: escapeHTML, escapeRegExp: escapeRegExp, everyNth: everyNth, extendHex: extendHex, factorial: factorial, factors: factors, fibonacci: fibonacci, fibonacciCountUntilNum: fibonacciCountUntilNum, fibonacciUntilNum: fibonacciUntilNum, filterNonUnique: filterNonUnique, flatten: flatten, flattenDepth: flattenDepth, flip: flip, formatDuration: formatDuration, fromCamelCase: fromCamelCase, functionName: functionName, gcd: gcd, geometricProgression: geometricProgression, getDaysDiffBetweenDates: getDaysDiffBetweenDates, getScrollPosition: getScrollPosition, getStyle: getStyle, getType: getType, getURLParameters: getURLParameters, groupBy: groupBy, hammingDistance: hammingDistance, hasClass: hasClass, hasFlags: hasFlags, head: head, hexToRGB: hexToRGB, hide: hide, howManyTimes: howManyTimes, httpsRedirect: httpsRedirect, inRange: inRange, initial: initial, initialize2DArray: initialize2DArray, initializeArrayWithRange: initializeArrayWithRange, initializeArrayWithValues: initializeArrayWithValues, intersection: intersection, invertKeyValues: invertKeyValues, isAbsoluteURL: isAbsoluteURL, isArmstrongNumber: isArmstrongNumber, isArray: isArray, isArrayLike: isArrayLike, isBoolean: isBoolean, isDivisible: isDivisible, isEven: isEven, isFunction: isFunction, isNull: isNull, isNumber: isNumber, isPrime: isPrime, isPrimitive: isPrimitive, isPromiseLike: isPromiseLike, isSorted: isSorted, isString: isString, isSymbol: isSymbol, isTravisCI: isTravisCI, isValidJSON: isValidJSON, join: join, last: last, lcm: lcm, lowercaseKeys: lowercaseKeys, luhnCheck: luhnCheck, mapObject: mapObject, mask: mask, maxN: maxN, median: median, memoize: memoize, minN: minN, negate: negate, nthElement: nthElement, objectFromPairs: objectFromPairs, objectToPairs: objectToPairs, onUserInputChange: onUserInputChange, once: once, orderBy: orderBy, palindrome: palindrome, percentile: percentile, pick: pick, pipeFunctions: pipeFunctions, pluralize: pluralize, powerset: powerset, prettyBytes: prettyBytes, primes: primes, promisify: promisify, pull: pull, pullAtIndex: pullAtIndex, pullAtValue: pullAtValue, quickSort: quickSort, randomHexColorCode: randomHexColorCode, randomIntegerInRange: randomIntegerInRange, randomNumberInRange: randomNumberInRange, readFileLines: readFileLines, redirect: redirect, reducedFilter: reducedFilter, remove: remove, repeatString: repeatString, reverseString: reverseString, round: round, runAsync: runAsync, runPromisesInSeries: runPromisesInSeries, sample: sample, sampleSize: sampleSize, scrollToTop: scrollToTop, sdbm: sdbm, select: select, setStyle: setStyle, shallowClone: shallowClone, show: show, shuffle: shuffle, similarity: similarity, size: size, sleep: sleep, solveRPN: solveRPN, sortCharactersInString: sortCharactersInString, sortedIndex: sortedIndex, speechSynthesis: speechSynthesis, splitLines: splitLines, spreadOver: spreadOver, standardDeviation: standardDeviation, sum: sum, sumPower: sumPower, symmetricDifference: symmetricDifference, tail: tail, take: take, takeRight: takeRight, timeTaken: timeTaken, toCamelCase: toCamelCase, toDecimalMark: toDecimalMark, toEnglishDate: toEnglishDate, toKebabCase: toKebabCase, toOrdinalSuffix: toOrdinalSuffix, toSnakeCase: toSnakeCase, toggleClass: toggleClass, tomorrow: tomorrow, truncateString: truncateString, truthCheckCollection: truthCheckCollection, unescapeHTML: unescapeHTML, union: union, untildify: untildify, validateNumber: validateNumber, without: without, words: words, yesNo: yesNo, zip: zip, zipObject: zipObject };
 
 return imports;
 
diff --git a/dist/_30s.es5.min.js b/dist/_30s.es5.min.js
index fd54202af..fcad427b8 100644
--- a/dist/_30s.es5.min.js
+++ b/dist/_30s.es5.min.js
@@ -1 +1 @@
-(function(a,b){'object'==typeof exports&&'undefined'!=typeof module?module.exports=b():'function'==typeof define&&define.amd?define(b):a._30s=b()})(this,function(){'use strict';function a(a){return Array.isArray(a)?a:Array.from(a)}function b(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}function c(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}function d(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}function e(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}function f(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}function g(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}function h(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}function i(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}function j(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}function k(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}function l(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}function m(a){return Array.isArray(a)?a:Array.from(a)}function n(a){return Array.isArray(a)?a:Array.from(a)}function o(a){return Array.isArray(a)?a:Array.from(a)}function p(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}function q(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}function r(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}function s(a){if(Array.isArray(a)){for(var b=0,c=Array(a.length);b<a.length;b++)c[b]=a[b];return c}return Array.from(a)}var t=Math.log,u=Math.floor,v=Math.sqrt,w=Math.pow,x=Math.min,y=Math.max,z=Math.ceil,A='undefined'!=typeof require&&require('fs'),B='undefined'!=typeof require&&require('crypto'),C=function(){function a(a,b){var c,d=[],e=!0,f=!1;try{for(var g,h=a[Symbol.iterator]();!(e=(g=h.next()).done)&&(d.push(g.value),!(b&&d.length===b));e=!0);}catch(a){f=!0,c=a}finally{try{!e&&h['return']&&h['return']()}finally{if(f)throw c}}return d}return function(b,c){if(Array.isArray(b))return b;if(Symbol.iterator in Object(b))return a(b,c);throw new TypeError('Invalid attempt to destructure non-iterable instance')}}(),D='function'==typeof Symbol&&'symbol'==typeof Symbol.iterator?function(a){return typeof a}:function(a){return a&&'function'==typeof 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Please check it and try again'},sortCharactersInString:function(a){return a.split('').sort(function(c,a){return c.localeCompare(a)}).join('')},sortedIndex:function(a,b){var c=a[0]>a[a.length-1],d=a.findIndex(function(a){return c?b>=a:b<=a});return-1===d?a.length:d},speechSynthesis:function(a){var b=new SpeechSynthesisUtterance(a);b.voice=window.speechSynthesis.getVoices()[0],window.speechSynthesis.speak(b)},splitLines:function(a){return a.split(/\r?\n/)},spreadOver:function(a){return function(b){return a.apply(void 0,q(b))}},standardDeviation:function(a){var b=1<arguments.length&&arguments[1]!==void 0&&arguments[1],c=a.reduce(function(a,b){return a+b},0)/a.length;return w(a.reduce(function(a,b){return a.concat(y(b-c,2))},[]).reduce(function(a,b){return a+b},0)/(a.length-(b?0:1)))},sum:function(){var a;return(a=[]).concat.apply(a,arguments).reduce(function(a,b){return a+b},0)},sumPower:function(a){var b=1<arguments.length&&arguments[1]!==void 0?arguments[1]:2,c=2<arguments.length&&arguments[2]!==void 0?arguments[2]:1;return Array(a+1-c).fill(0).map(function(a,d){return y(d+c,b)}).reduce(function(c,a){return c+a},0)},symmetricDifference:function(c,a){var b=new Set(c),d=new Set(a);return[].concat(r(c.filter(function(a){return!d.has(a)})),r(a.filter(function(a){return!b.has(a)})))},tail:function(a){return 1<a.length?a.slice(1):a},take:function(a){var b=1<arguments.length&&arguments[1]!==void 0?arguments[1]:1;return a.slice(0,b)},takeRight:function(a){var b=1<arguments.length&&arguments[1]!==void 0?arguments[1]:1;return a.slice(a.length-b,a.length)},timeTaken:function(a){console.time('timeTaken');var b=a();return console.timeEnd('timeTaken'),b},toCamelCase:function(a){var b=a&&a.match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g).map(function(a){return a.slice(0,1).toUpperCase()+a.slice(1).toLowerCase()}).join('');return b.slice(0,1).toLowerCase()+b.slice(1)},toDecimalMark:function(a){return a.toLocaleString('en-US')},toEnglishDate:function(a){try{return new Date(a).toISOString().split('T')[0].replace(/-/g,'/')}catch(a){}},toKebabCase:function(a){return a&&a.match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g).map(function(a){return a.toLowerCase()}).join('-')},toOrdinalSuffix:function(a){var b=parseInt(a),c=[b%10,b%100],d=['st','nd','rd','th'];return[1,2,3,4].includes(c[0])&&![11,12,13,14,15,16,17,18,19].includes(c[1])?b+d[c[0]-1]:b+d[3]},toSnakeCase:function(a){return a&&a.match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g).map(function(a){return a.toLowerCase()}).join('_')},toggleClass:function(a,b){return a.classList.toggle(b)},tomorrow:function(){return new Date(new Date().getTime()+8.64e7).toISOString().split('T')[0]},truncateString:function(a,b){return a.length>b?a.slice(0,3<b?b-3:b)+'...':a},truthCheckCollection:function(a,b){return a.every(function(a){return a[b]})},unescapeHTML:function(a){return a.replace(/&amp;|&lt;|&gt;|&#39;|&quot;/g,function(a){return{"&amp;":'&',"&lt;":'<',"&gt;":'>',"&#39;":'\'',"&quot;":'"'}[a]||a})},union:function(c,a){return Array.from(new Set([].concat(s(c),s(a))))},untildify:function(a){return a.replace(/^~($|\/|\\)/,('undefined'!=typeof require&&require('os').homedir())+'$1')},validateNumber:function(a){return!isNaN(parseFloat(a))&&isFinite(a)&&+a==a},without:function(a){for(var b=arguments.length,c=Array(1<b?b-1:0),d=1;d<b;d++)c[d-1]=arguments[d];return a.filter(function(a){return!c.includes(a)})},words:function(a){var b=1<arguments.length&&arguments[1]!==void 0?arguments[1]:/[^a-zA-Z-]+/;return a.split(b).filter(Boolean)},yesNo:function(a){var b=1<arguments.length&&arguments[1]!==void 0&&arguments[1];return!!/^(y|yes)$/i.test(a)||!/^(n|no)$/i.test(a)&&b},zip:function(){for(var a=arguments.length,b=Array(a),c=0;c<a;c++)b[c]=arguments[c];var d=z.apply(Math,t(b.map(function(a){return a.length})));return Array.from({length:d}).map(function(a,c){return Array.from({length:b.length},function(a,d){return b[d][c]})})},zipObject:function(a,b){return a.reduce(function(a,c,d){return a[c]=b[d],a},{})}}});
diff --git a/dist/_30s.esm.js b/dist/_30s.esm.js
index e1a0c6863..7cf6c7f0c 100644
--- a/dist/_30s.esm.js
+++ b/dist/_30s.esm.js
@@ -131,7 +131,7 @@ const difference = (a, b) => {
   return a.filter(x => !s.has(x));
 };
 
-const differenceWith = (arr, val, comp) => arr.filter(a => !val.find(b => comp(a, b)));
+const differenceWith = (arr, val, comp) => arr.filter(a => val.findIndex(b => comp(a, b)) === -1);
 
 const digitize = n => [...('' + n)].map(i => parseInt(i));
 
@@ -155,10 +155,23 @@ const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
     : top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth;
 };
 
-const elo = ([a, b], kFactor = 32) => {
+const elo = ([...ratings], kFactor = 32, selfRating) => {
+  const [a, b] = ratings;
   const expectedScore = (self, opponent) => 1 / (1 + 10 ** ((opponent - self) / 400));
-  const newRating = (rating, i) => rating + kFactor * (i - expectedScore(i ? a : b, i ? b : a));
-  return [newRating(a, 1), newRating(b, 0)];
+  const newRating = (rating, i) =>
+    (selfRating || rating) + kFactor * (i - expectedScore(i ? a : b, i ? b : a));
+  if (ratings.length === 2) {
+    return [newRating(a, 1), newRating(b, 0)];
+  } else {
+    for (let i = 0; i < ratings.length; i++) {
+      let j = i;
+      while (j < ratings.length - 1) {
+        [ratings[i], ratings[j + 1]] = elo([ratings[i], ratings[j + 1]], kFactor);
+        j++;
+      }
+    }
+  }
+  return ratings;
 };
 
 const escapeHTML = str =>
@@ -241,6 +254,21 @@ const flattenDepth = (arr, depth = 1) =>
 
 const flip = fn => (...args) => fn(args.pop(), ...args);
 
+const formatDuration = ms => {
+  if (ms < 0) ms = -ms;
+  const time = {
+    day: Math.floor(ms / 86400000),
+    hour: Math.floor(ms / 3600000) % 24,
+    minute: Math.floor(ms / 60000) % 60,
+    second: Math.floor(ms / 1000) % 60,
+    millisecond: Math.floor(ms) % 1000
+  };
+  return Object.entries(time)
+    .filter(val => val[1] !== 0)
+    .map(val => val[1] + ' ' + (val[1] !== 1 ? val[0] + 's' : val[0]))
+    .join(', ');
+};
+
 const fromCamelCase = (str, separator = '_') =>
   str
     .replace(/([a-z\d])([A-Z])/g, '$1' + separator + '$2')
@@ -250,9 +278,8 @@ const fromCamelCase = (str, separator = '_') =>
 const functionName = fn => (console.debug(fn.name), fn);
 
 const gcd = (...arr) => {
-  let data = [].concat(...arr);
-  const helperGcd = (x, y) => (!y ? x : gcd(y, x % y));
-  return data.reduce((a, b) => helperGcd(a, b));
+  const _gcd = (x, y) => (!y ? x : gcd(y, x % y));
+  return [].concat(...arr).reduce((a, b) => _gcd(a, b));
 };
 
 const geometricProgression = (end, start = 1, step = 2) =>
@@ -381,7 +408,7 @@ const isDivisible = (dividend, divisor) => dividend % divisor === 0;
 
 const isEven = num => num % 2 === 0;
 
-const isFunction = val => val && typeof val === 'function';
+const isFunction = val => typeof val === 'function';
 
 const isNull = val => val === null;
 
@@ -445,6 +472,17 @@ const lowercaseKeys = obj =>
     return acc;
   }, {});
 
+const luhnCheck = num => {
+  let arr = (num + '')
+    .split('')
+    .reverse()
+    .map(x => parseInt(x));
+  let lastDigit = arr.splice(0, 1)[0];
+  let sum = arr.reduce((acc, val, i) => (i % 2 !== 0 ? acc + val : acc + (val * 2) % 9 || 9), 0);
+  sum += lastDigit;
+  return sum % 10 === 0;
+};
+
 const mapObject = (arr, fn) =>
   (a => (
     a = [arr, arr.map(fn)], a[0].reduce((acc, val, ind) => (acc[val] = a[1][ind], acc), {})))();
@@ -533,12 +571,12 @@ const pick = (obj, arr) =>
 
 const pipeFunctions = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args)));
 
-const pluralize = (num, item, items = item + 's') =>
-  num <= 0
-    ? (() => {
-        throw new Error(`'num' should be >= 1. Value povided was ${num}.`);
-      })()
-    : num === 1 ? item : items;
+const pluralize = (val, word, plural = word + 's') => {
+  const _pluralize = (num, word, plural = word + 's') =>
+    [1, -1].includes(Number(num)) ? word : plural;
+  if (typeof val === 'object') return (num, word) => _pluralize(num, word, val[word]);
+  return _pluralize(val, word, plural);
+};
 
 const powerset = arr => arr.reduce((a, v) => a.concat(a.map(r => [v].concat(r))), [[]]);
 
@@ -898,6 +936,6 @@ const zip = (...arrays) => {
 const zipObject = (props, values) =>
   props.reduce((obj, prop, index) => (obj[prop] = values[index], obj), {});
 
-var imports = {JSONToDate,JSONToFile,RGBToHex,UUIDGeneratorBrowser,UUIDGeneratorNode,anagrams,arrayToHtmlList,average,bottomVisible,byteSize,call,capitalize,capitalizeEveryWord,chainAsync,chunk,clampNumber,cleanObj,cloneRegExp,coalesce,coalesceFactory,collatz,collectInto,compact,compose,copyToClipboard,countOccurrences,countVowels,currentURL,curry,deepFlatten,defer,detectDeviceType,difference,differenceWith,digitize,distance,distinctValuesOfArray,dropElements,dropRight,elementIsVisibleInViewport,elo,escapeHTML,escapeRegExp,everyNth,extendHex,factorial,factors,fibonacci,fibonacciCountUntilNum,fibonacciUntilNum,filterNonUnique,flatten,flattenDepth,flip,fromCamelCase,functionName,gcd,geometricProgression,getDaysDiffBetweenDates,getScrollPosition,getStyle,getType,getURLParameters,groupBy,hammingDistance,hasClass,hasFlags,head,hexToRGB,hide,howManyTimes,httpsRedirect,inRange,initial,initialize2DArray,initializeArrayWithRange,initializeArrayWithValues,intersection,invertKeyValues,isAbsoluteURL,isArmstrongNumber,isArray,isArrayLike,isBoolean,isDivisible,isEven,isFunction,isNull,isNumber,isPrime,isPrimitive,isPromiseLike,isSorted,isString,isSymbol,isTravisCI,isValidJSON,join,last,lcm,lowercaseKeys,mapObject,mask,maxN,median,memoize,minN,negate,nthElement,objectFromPairs,objectToPairs,onUserInputChange,once,orderBy,palindrome,percentile,pick,pipeFunctions,pluralize,powerset,prettyBytes,primes,promisify,pull,pullAtIndex,pullAtValue,quickSort,randomHexColorCode,randomIntegerInRange,randomNumberInRange,readFileLines,redirect,reducedFilter,remove,repeatString,reverseString,round,runAsync,runPromisesInSeries,sample,sampleSize,scrollToTop,sdbm,select,setStyle,shallowClone,show,shuffle,similarity,size,sleep,solveRPN,sortCharactersInString,sortedIndex,speechSynthesis,splitLines,spreadOver,standardDeviation,sum,sumPower,symmetricDifference,tail,take,takeRight,timeTaken,toCamelCase,toDecimalMark,toEnglishDate,toKebabCase,toOrdinalSuffix,toSnakeCase,toggleClass,tomorrow,truncateString,truthCheckCollection,unescapeHTML,union,untildify,validateNumber,without,words,yesNo,zip,zipObject,}
+var imports = {JSONToDate,JSONToFile,RGBToHex,UUIDGeneratorBrowser,UUIDGeneratorNode,anagrams,arrayToHtmlList,average,bottomVisible,byteSize,call,capitalize,capitalizeEveryWord,chainAsync,chunk,clampNumber,cleanObj,cloneRegExp,coalesce,coalesceFactory,collatz,collectInto,compact,compose,copyToClipboard,countOccurrences,countVowels,currentURL,curry,deepFlatten,defer,detectDeviceType,difference,differenceWith,digitize,distance,distinctValuesOfArray,dropElements,dropRight,elementIsVisibleInViewport,elo,escapeHTML,escapeRegExp,everyNth,extendHex,factorial,factors,fibonacci,fibonacciCountUntilNum,fibonacciUntilNum,filterNonUnique,flatten,flattenDepth,flip,formatDuration,fromCamelCase,functionName,gcd,geometricProgression,getDaysDiffBetweenDates,getScrollPosition,getStyle,getType,getURLParameters,groupBy,hammingDistance,hasClass,hasFlags,head,hexToRGB,hide,howManyTimes,httpsRedirect,inRange,initial,initialize2DArray,initializeArrayWithRange,initializeArrayWithValues,intersection,invertKeyValues,isAbsoluteURL,isArmstrongNumber,isArray,isArrayLike,isBoolean,isDivisible,isEven,isFunction,isNull,isNumber,isPrime,isPrimitive,isPromiseLike,isSorted,isString,isSymbol,isTravisCI,isValidJSON,join,last,lcm,lowercaseKeys,luhnCheck,mapObject,mask,maxN,median,memoize,minN,negate,nthElement,objectFromPairs,objectToPairs,onUserInputChange,once,orderBy,palindrome,percentile,pick,pipeFunctions,pluralize,powerset,prettyBytes,primes,promisify,pull,pullAtIndex,pullAtValue,quickSort,randomHexColorCode,randomIntegerInRange,randomNumberInRange,readFileLines,redirect,reducedFilter,remove,repeatString,reverseString,round,runAsync,runPromisesInSeries,sample,sampleSize,scrollToTop,sdbm,select,setStyle,shallowClone,show,shuffle,similarity,size,sleep,solveRPN,sortCharactersInString,sortedIndex,speechSynthesis,splitLines,spreadOver,standardDeviation,sum,sumPower,symmetricDifference,tail,take,takeRight,timeTaken,toCamelCase,toDecimalMark,toEnglishDate,toKebabCase,toOrdinalSuffix,toSnakeCase,toggleClass,tomorrow,truncateString,truthCheckCollection,unescapeHTML,union,untildify,validateNumber,without,words,yesNo,zip,zipObject,}
 
 export default imports;
diff --git a/dist/_30s.js b/dist/_30s.js
index e166b4773..a6d37a996 100644
--- a/dist/_30s.js
+++ b/dist/_30s.js
@@ -137,7 +137,7 @@ const difference = (a, b) => {
   return a.filter(x => !s.has(x));
 };
 
-const differenceWith = (arr, val, comp) => arr.filter(a => !val.find(b => comp(a, b)));
+const differenceWith = (arr, val, comp) => arr.filter(a => val.findIndex(b => comp(a, b)) === -1);
 
 const digitize = n => [...('' + n)].map(i => parseInt(i));
 
@@ -161,10 +161,23 @@ const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
     : top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth;
 };
 
-const elo = ([a, b], kFactor = 32) => {
+const elo = ([...ratings], kFactor = 32, selfRating) => {
+  const [a, b] = ratings;
   const expectedScore = (self, opponent) => 1 / (1 + 10 ** ((opponent - self) / 400));
-  const newRating = (rating, i) => rating + kFactor * (i - expectedScore(i ? a : b, i ? b : a));
-  return [newRating(a, 1), newRating(b, 0)];
+  const newRating = (rating, i) =>
+    (selfRating || rating) + kFactor * (i - expectedScore(i ? a : b, i ? b : a));
+  if (ratings.length === 2) {
+    return [newRating(a, 1), newRating(b, 0)];
+  } else {
+    for (let i = 0; i < ratings.length; i++) {
+      let j = i;
+      while (j < ratings.length - 1) {
+        [ratings[i], ratings[j + 1]] = elo([ratings[i], ratings[j + 1]], kFactor);
+        j++;
+      }
+    }
+  }
+  return ratings;
 };
 
 const escapeHTML = str =>
@@ -247,6 +260,21 @@ const flattenDepth = (arr, depth = 1) =>
 
 const flip = fn => (...args) => fn(args.pop(), ...args);
 
+const formatDuration = ms => {
+  if (ms < 0) ms = -ms;
+  const time = {
+    day: Math.floor(ms / 86400000),
+    hour: Math.floor(ms / 3600000) % 24,
+    minute: Math.floor(ms / 60000) % 60,
+    second: Math.floor(ms / 1000) % 60,
+    millisecond: Math.floor(ms) % 1000
+  };
+  return Object.entries(time)
+    .filter(val => val[1] !== 0)
+    .map(val => val[1] + ' ' + (val[1] !== 1 ? val[0] + 's' : val[0]))
+    .join(', ');
+};
+
 const fromCamelCase = (str, separator = '_') =>
   str
     .replace(/([a-z\d])([A-Z])/g, '$1' + separator + '$2')
@@ -256,9 +284,8 @@ const fromCamelCase = (str, separator = '_') =>
 const functionName = fn => (console.debug(fn.name), fn);
 
 const gcd = (...arr) => {
-  let data = [].concat(...arr);
-  const helperGcd = (x, y) => (!y ? x : gcd(y, x % y));
-  return data.reduce((a, b) => helperGcd(a, b));
+  const _gcd = (x, y) => (!y ? x : gcd(y, x % y));
+  return [].concat(...arr).reduce((a, b) => _gcd(a, b));
 };
 
 const geometricProgression = (end, start = 1, step = 2) =>
@@ -387,7 +414,7 @@ const isDivisible = (dividend, divisor) => dividend % divisor === 0;
 
 const isEven = num => num % 2 === 0;
 
-const isFunction = val => val && typeof val === 'function';
+const isFunction = val => typeof val === 'function';
 
 const isNull = val => val === null;
 
@@ -451,6 +478,17 @@ const lowercaseKeys = obj =>
     return acc;
   }, {});
 
+const luhnCheck = num => {
+  let arr = (num + '')
+    .split('')
+    .reverse()
+    .map(x => parseInt(x));
+  let lastDigit = arr.splice(0, 1)[0];
+  let sum = arr.reduce((acc, val, i) => (i % 2 !== 0 ? acc + val : acc + (val * 2) % 9 || 9), 0);
+  sum += lastDigit;
+  return sum % 10 === 0;
+};
+
 const mapObject = (arr, fn) =>
   (a => (
     a = [arr, arr.map(fn)], a[0].reduce((acc, val, ind) => (acc[val] = a[1][ind], acc), {})))();
@@ -539,12 +577,12 @@ const pick = (obj, arr) =>
 
 const pipeFunctions = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args)));
 
-const pluralize = (num, item, items = item + 's') =>
-  num <= 0
-    ? (() => {
-        throw new Error(`'num' should be >= 1. Value povided was ${num}.`);
-      })()
-    : num === 1 ? item : items;
+const pluralize = (val, word, plural = word + 's') => {
+  const _pluralize = (num, word, plural = word + 's') =>
+    [1, -1].includes(Number(num)) ? word : plural;
+  if (typeof val === 'object') return (num, word) => _pluralize(num, word, val[word]);
+  return _pluralize(val, word, plural);
+};
 
 const powerset = arr => arr.reduce((a, v) => a.concat(a.map(r => [v].concat(r))), [[]]);
 
@@ -904,7 +942,7 @@ const zip = (...arrays) => {
 const zipObject = (props, values) =>
   props.reduce((obj, prop, index) => (obj[prop] = values[index], obj), {});
 
-var imports = {JSONToDate,JSONToFile,RGBToHex,UUIDGeneratorBrowser,UUIDGeneratorNode,anagrams,arrayToHtmlList,average,bottomVisible,byteSize,call,capitalize,capitalizeEveryWord,chainAsync,chunk,clampNumber,cleanObj,cloneRegExp,coalesce,coalesceFactory,collatz,collectInto,compact,compose,copyToClipboard,countOccurrences,countVowels,currentURL,curry,deepFlatten,defer,detectDeviceType,difference,differenceWith,digitize,distance,distinctValuesOfArray,dropElements,dropRight,elementIsVisibleInViewport,elo,escapeHTML,escapeRegExp,everyNth,extendHex,factorial,factors,fibonacci,fibonacciCountUntilNum,fibonacciUntilNum,filterNonUnique,flatten,flattenDepth,flip,fromCamelCase,functionName,gcd,geometricProgression,getDaysDiffBetweenDates,getScrollPosition,getStyle,getType,getURLParameters,groupBy,hammingDistance,hasClass,hasFlags,head,hexToRGB,hide,howManyTimes,httpsRedirect,inRange,initial,initialize2DArray,initializeArrayWithRange,initializeArrayWithValues,intersection,invertKeyValues,isAbsoluteURL,isArmstrongNumber,isArray,isArrayLike,isBoolean,isDivisible,isEven,isFunction,isNull,isNumber,isPrime,isPrimitive,isPromiseLike,isSorted,isString,isSymbol,isTravisCI,isValidJSON,join,last,lcm,lowercaseKeys,mapObject,mask,maxN,median,memoize,minN,negate,nthElement,objectFromPairs,objectToPairs,onUserInputChange,once,orderBy,palindrome,percentile,pick,pipeFunctions,pluralize,powerset,prettyBytes,primes,promisify,pull,pullAtIndex,pullAtValue,quickSort,randomHexColorCode,randomIntegerInRange,randomNumberInRange,readFileLines,redirect,reducedFilter,remove,repeatString,reverseString,round,runAsync,runPromisesInSeries,sample,sampleSize,scrollToTop,sdbm,select,setStyle,shallowClone,show,shuffle,similarity,size,sleep,solveRPN,sortCharactersInString,sortedIndex,speechSynthesis,splitLines,spreadOver,standardDeviation,sum,sumPower,symmetricDifference,tail,take,takeRight,timeTaken,toCamelCase,toDecimalMark,toEnglishDate,toKebabCase,toOrdinalSuffix,toSnakeCase,toggleClass,tomorrow,truncateString,truthCheckCollection,unescapeHTML,union,untildify,validateNumber,without,words,yesNo,zip,zipObject,}
+var imports = {JSONToDate,JSONToFile,RGBToHex,UUIDGeneratorBrowser,UUIDGeneratorNode,anagrams,arrayToHtmlList,average,bottomVisible,byteSize,call,capitalize,capitalizeEveryWord,chainAsync,chunk,clampNumber,cleanObj,cloneRegExp,coalesce,coalesceFactory,collatz,collectInto,compact,compose,copyToClipboard,countOccurrences,countVowels,currentURL,curry,deepFlatten,defer,detectDeviceType,difference,differenceWith,digitize,distance,distinctValuesOfArray,dropElements,dropRight,elementIsVisibleInViewport,elo,escapeHTML,escapeRegExp,everyNth,extendHex,factorial,factors,fibonacci,fibonacciCountUntilNum,fibonacciUntilNum,filterNonUnique,flatten,flattenDepth,flip,formatDuration,fromCamelCase,functionName,gcd,geometricProgression,getDaysDiffBetweenDates,getScrollPosition,getStyle,getType,getURLParameters,groupBy,hammingDistance,hasClass,hasFlags,head,hexToRGB,hide,howManyTimes,httpsRedirect,inRange,initial,initialize2DArray,initializeArrayWithRange,initializeArrayWithValues,intersection,invertKeyValues,isAbsoluteURL,isArmstrongNumber,isArray,isArrayLike,isBoolean,isDivisible,isEven,isFunction,isNull,isNumber,isPrime,isPrimitive,isPromiseLike,isSorted,isString,isSymbol,isTravisCI,isValidJSON,join,last,lcm,lowercaseKeys,luhnCheck,mapObject,mask,maxN,median,memoize,minN,negate,nthElement,objectFromPairs,objectToPairs,onUserInputChange,once,orderBy,palindrome,percentile,pick,pipeFunctions,pluralize,powerset,prettyBytes,primes,promisify,pull,pullAtIndex,pullAtValue,quickSort,randomHexColorCode,randomIntegerInRange,randomNumberInRange,readFileLines,redirect,reducedFilter,remove,repeatString,reverseString,round,runAsync,runPromisesInSeries,sample,sampleSize,scrollToTop,sdbm,select,setStyle,shallowClone,show,shuffle,similarity,size,sleep,solveRPN,sortCharactersInString,sortedIndex,speechSynthesis,splitLines,spreadOver,standardDeviation,sum,sumPower,symmetricDifference,tail,take,takeRight,timeTaken,toCamelCase,toDecimalMark,toEnglishDate,toKebabCase,toOrdinalSuffix,toSnakeCase,toggleClass,tomorrow,truncateString,truthCheckCollection,unescapeHTML,union,untildify,validateNumber,without,words,yesNo,zip,zipObject,}
 
 return imports;
 
diff --git a/dist/_30s.min.js b/dist/_30s.min.js
index 2b01214d3..834c6b5f5 100644
--- a/dist/_30s.min.js
+++ b/dist/_30s.min.js
@@ -1 +1 @@
-(function(a,b){'object'==typeof exports&&'undefined'!=typeof module?module.exports=b():'function'==typeof define&&define.amd?define(b):a._30s=b()})(this,function(){'use strict';var a=Math.log,b=Math.floor,c=Math.sqrt,d=Math.min,e=Math.max,f=Math.ceil;const g='undefined'!=typeof require&&require('fs'),h='undefined'!=typeof require&&require('crypto'),j=(a)=>2>=a.length?2===a.length?[a,a[1]+a[0]]:[a]:a.split('').reduce((b,c,d)=>b.concat(j(a.slice(0,d)+a.slice(d+1)).map((a)=>c+a)),[]),i=(a,b=[],c)=>(Object.keys(a).forEach((d)=>{d===c?i(a[d],b,c):!b.includes(d)&&delete a[d]}),a),k=(a,b=a.length,...c)=>b<=c.length?a(...c):k.bind(null,a,b,...c),l=(a)=>[].concat(...a.map((a)=>Array.isArray(a)?l(a):a)),m=(a)=>0>a?(()=>{throw new TypeError('Negative numbers are not allowed!')})():1>=a?1:a*m(a-1),n=(a,b=1)=>1==b?a.reduce((b,a)=>b.concat(a),[]):a.reduce((c,a)=>c.concat(Array.isArray(a)?n(a,b-1):a),[]),o=(...a)=>{let b=[].concat(...a);const c=(a,b)=>b?o(b,a%b):a;return b.reduce((d,a)=>c(d,a))},p=([a,...b],c)=>isNaN(a)?[]:[...p(b.filter((b)=>c?b>a:b<=a),c),a,...p(b.filter((b)=>c?b<=a:b>a),c)],q='undefined'!=typeof require&&require('fs'),r=()=>{const a=document.documentElement.scrollTop||document.body.scrollTop;0<a&&(window.requestAnimationFrame(r),window.scrollTo(0,a-a/8))};return{JSONToDate:(a)=>{const b=new Date(parseInt(a.toString().substr(6)));return`${b.getDate()}/${b.getMonth()+1}/${b.getFullYear()}`},JSONToFile:(a,b)=>g.writeFile(`${b}.json`,JSON.stringify(a,null,2)),RGBToHex:(a,c,d)=>((a<<16)+(c<<8)+d).toString(16).padStart(6,'0'),UUIDGeneratorBrowser:()=>'10000000-1000-4000-8000-100000000000'.replace(/[018]/g,(a)=>(a^crypto.getRandomValues(new Uint8Array(1))[0]&15>>a/4).toString(16)),UUIDGeneratorNode:()=>'10000000-1000-4000-8000-100000000000'.replace(/[018]/g,(a)=>(a^h.randomBytes(1)[0]&15>>a/4).toString(16)),anagrams:j,arrayToHtmlList:(a,b)=>a.map((a)=>document.querySelector('#'+b).innerHTML+=`<li>${a}</li>`),average:(...a)=>{const b=[].concat(...a);return b.reduce((a,b)=>a+b,0)/b.length},bottomVisible:()=>document.documentElement.clientHeight+window.scrollY>=(document.documentElement.scrollHeight||document.documentElement.clientHeight),byteSize:(a)=>new Blob([a]).size,call:(a,...b)=>(c)=>c[a](...b),capitalize:([a,...b],c=!1)=>a.toUpperCase()+(c?b.join('').toLowerCase():b.join('')),capitalizeEveryWord:(a)=>a.replace(/\b[a-z]/g,(a)=>a.toUpperCase()),chainAsync:(a)=>{let b=0;const c=()=>a[b++](c);c()},chunk:(a,b)=>Array.from({length:f(a.length/b)},(c,d)=>a.slice(d*b,d*b+b)),clampNumber:(c,f,a)=>e(d(c,e(f,a)),d(f,a)),cleanObj:i,cloneRegExp:(a)=>new RegExp(a.source,a.flags),coalesce:(...a)=>a.find((a)=>![void 0,null].includes(a)),coalesceFactory:(a)=>(...b)=>b.find(a),collatz:(a)=>0==a%2?a/2:3*a+1,collectInto:(a)=>(...b)=>a(b),compact:(a)=>a.filter(Boolean),compose:(...a)=>a.reduce((a,b)=>(...c)=>a(b(...c))),copyToClipboard:(a)=>{const b=document.createElement('textarea');b.value=a,b.setAttribute('readonly',''),b.style.position='absolute',b.style.left='-9999px',document.body.appendChild(b);const c=!!(0<document.getSelection().rangeCount)&&document.getSelection().getRangeAt(0);b.select(),document.execCommand('copy'),document.body.removeChild(b),c&&(document.getSelection().removeAllRanges(),document.getSelection().addRange(c))},countOccurrences:(a,b)=>a.reduce((c,a)=>a===b?c+1:c+0,0),countVowels:(a)=>(a.match(/[aeiou]/gi)||[]).length,currentURL:()=>window.location.href,curry:k,deepFlatten:l,defer:(a,...b)=>setTimeout(a,1,...b),detectDeviceType:()=>/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)?'Mobile':'Desktop',difference:(c,a)=>{const b=new Set(a);return c.filter((a)=>!b.has(a))},differenceWith:(a,b,c)=>a.filter((d)=>!b.find((a)=>c(d,a))),digitize:(a)=>[...(''+a)].map((a)=>parseInt(a)),distance:(a,b,c,d)=>Math.hypot(c-a,d-b),distinctValuesOfArray:(a)=>[...new Set(a)],dropElements:(a,b)=>{for(;0<a.length&&!b(a[0]);)a=a.slice(1);return a},dropRight:(a,b=1)=>a.slice(0,-b),elementIsVisibleInViewport:(a,b=!1)=>{const{top:c,left:d,bottom:e,right:f}=a.getBoundingClientRect(),{innerHeight:g,innerWidth:h}=window;return b?(0<c&&c<g||0<e&&e<g)&&(0<d&&d<h||0<f&&f<h):0<=c&&0<=d&&e<=g&&f<=h},elo:([c,a],b=32)=>{const d=(a,b)=>1/(1+10**((b-a)/400)),e=(e,f)=>e+b*(f-d(f?c:a,f?a:c));return[e(c,1),e(a,0)]},escapeHTML:(a)=>a.replace(/[&<>'"]/g,(a)=>({"&":'&amp;',"<":'&lt;',">":'&gt;',"'":'&#39;','"':'&quot;'})[a]||a),escapeRegExp:(a)=>a.replace(/[.*+?^${}()|[\]\\]/g,'\\$&'),everyNth:(a,b)=>a.filter((a,c)=>c%b==b-1),extendHex:(a)=>'#'+a.slice(a.startsWith('#')?1:0).split('').map((a)=>a+a).join(''),factorial:m,factors:(a,d=!1)=>{const e=0>a;a=e?-a:a;let f=Array.from({length:a-1}).map((b,c)=>0==a%(c+2)&&c+2).filter((a)=>a);return e&&(f=f.reduce((a,b)=>(a.push(b),a.push(-b),a),[])),d?f.filter((a)=>{const d=b(c(a));for(var e=2;e<=d;e++)if(0==a%e)return!1;return 2<=a}):f},fibonacci:(a)=>Array.from({length:a}).reduce((a,b,c)=>a.concat(1<c?a[c-1]+a[c-2]:c),[]),fibonacciCountUntilNum:(b)=>f(a(2.23606797749979*b+1/2)/0.48121182505960347),fibonacciUntilNum:(b)=>{let c=f(a(2.23606797749979*b+1/2)/0.48121182505960347);return Array.from({length:c}).reduce((a,b,c)=>a.concat(1<c?a[c-1]+a[c-2]:c),[])},filterNonUnique:(a)=>a.filter((b)=>a.indexOf(b)===a.lastIndexOf(b)),flatten:(a)=>[].concat(...a),flattenDepth:n,flip:(a)=>(...b)=>a(b.pop(),...b),fromCamelCase:(a,b='_')=>a.replace(/([a-z\d])([A-Z])/g,'$1'+b+'$2').replace(/([A-Z]+)([A-Z][a-z\d]+)/g,'$1'+b+'$2').toLowerCase(),functionName:(a)=>(console.debug(a.name),a),gcd:o,geometricProgression:(c,d=1,e=2)=>Array.from({length:b(a(c/d)/a(e))+1}).map((a,b)=>d*e**b),getDaysDiffBetweenDates:(a,b)=>(b-a)/86400000,getScrollPosition:(a=window)=>({x:a.pageXOffset===void 0?a.scrollLeft:a.pageXOffset,y:a.pageYOffset===void 0?a.scrollTop:a.pageYOffset}),getStyle:(a,b)=>getComputedStyle(a)[b],getType:(a)=>a===void 0?'undefined':null===a?'null':a.constructor.name.toLowerCase(),getURLParameters:(a)=>a.match(/([^?=&]+)(=([^&]*))/g).reduce((b,a)=>(b[a.slice(0,a.indexOf('='))]=a.slice(a.indexOf('=')+1),b),{}),groupBy:(a,b)=>a.map('function'==typeof b?b:(a)=>a[b]).reduce((b,c,d)=>(b[c]=(b[c]||[]).concat(a[d]),b),{}),hammingDistance:(a,b)=>((a^b).toString(2).match(/1/g)||'').length,hasClass:(a,b)=>a.classList.contains(b),hasFlags:(...a)=>a.every((a)=>process.argv.includes(/^-{1,2}/.test(a)?a:'--'+a)),head:(a)=>a[0],hexToRGB:(a)=>{let b=!1,c=a.slice(a.startsWith('#')?1:0);return 3===c.length?c=[...c].map((a)=>a+a).join(''):8===c.length&&(b=!0),c=parseInt(c,16),'rgb'+(b?'a':'')+'('+(c>>>(b?24:16))+', '+((c&(b?16711680:65280))>>>(b?16:8))+', '+((c&(b?65280:255))>>>(b?8:0))+(b?`, ${255&c}`:'')+')'},hide:(...a)=>[...a].forEach((a)=>a.style.display='none'),howManyTimes:(a,b)=>{if(1===b||-1===b)return Infinity;if(0===b)return 0;let c=0;for(;Number.isInteger(a/b);)c++,a/=b;return c},httpsRedirect:()=>{'https:'!==location.protocol&&location.replace('https://'+location.href.split('//')[1])},inRange:(a,b,c=null)=>(c&&b>c&&(c=b),null==c?0<=a&&a<b:a>=b&&a<c),initial:(a)=>a.slice(0,-1),initialize2DArray:(a,b,c=null)=>Array(b).fill().map(()=>Array(a).fill(c)),initializeArrayWithRange:(a,b=0,c=1)=>Array.from({length:f((a+1-b)/c)}).map((a,d)=>d*c+b),initializeArrayWithValues:(a,b=0)=>Array(a).fill(b),intersection:(c,a)=>{const b=new Set(a);return c.filter((a)=>b.has(a))},invertKeyValues:(a)=>Object.keys(a).reduce((b,c)=>(b[a[c]]=c,b),{}),isAbsoluteURL:(a)=>/^[a-z][a-z0-9+.-]*:/.test(a),isArmstrongNumber:(a)=>((b)=>b.reduce((c,a)=>c+parseInt(a)**b.length,0)==a)((a+'').split('')),isArray:(a)=>!!a&&Array.isArray(a),isArrayLike:(a)=>{try{return[...a],!0}catch(a){return!1}},isBoolean:(a)=>'boolean'==typeof a,isDivisible:(a,b)=>0==a%b,isEven:(a)=>0==a%2,isFunction:(a)=>a&&'function'==typeof a,isNull:(a)=>null===a,isNumber:(a)=>'number'==typeof a,isPrime:(a)=>{const 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From 6410ade54e14a598b38e69f270c17cc8721a3bcd Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Fri, 5 Jan 2018 10:01:40 +1100
Subject: [PATCH 02/14] Improve syntax highlighting

---
 docs/mini/flavor.scss | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/docs/mini/flavor.scss b/docs/mini/flavor.scss
index c400fdde5..19f8851a5 100644
--- a/docs/mini/flavor.scss
+++ b/docs/mini/flavor.scss
@@ -318,7 +318,7 @@ button.primary.clipboard-copy {
 
 code[class*="language-"],
 pre[class*="language-"] {
-  color: black;
+  color: #222;
   text-align: left;
   white-space: pre;
   word-spacing: normal;
@@ -385,8 +385,9 @@ code[class*="language-"]::selection, code[class*="language-"] ::selection {
 }
 
 
-.token.number{
-  color: #8132b5;
+.token.number,
+.token.class-name {
+  color: #832ed2;
 }
 
 .token.selector,
@@ -395,7 +396,7 @@ code[class*="language-"]::selection, code[class*="language-"] ::selection {
 .token.char,
 .token.builtin,
 .token.inserted {
-  color: #007e5d;
+  color: #067e36;
 }
 
 .token.operator,
@@ -410,7 +411,7 @@ code[class*="language-"]::selection, code[class*="language-"] ::selection {
 }
 
 .token.regex {
-  color: #007972;
+  color: #097cab;
 }
 .token.important,
 .token.variable {

From 814a8b903b018ea35bd104c726ce034d8ae16114 Mon Sep 17 00:00:00 2001
From: Vivek <pawarvivek29@gmail.com>
Date: Fri, 5 Jan 2018 14:29:20 +0530
Subject: [PATCH 03/14] Updated initializeArrayWithRange

There was typo mistake in which Array.from was missing from Array(Math.ceil((end+1-start)/step) in description of snippet
---
 snippets/initializeArrayWithRange.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/initializeArrayWithRange.md b/snippets/initializeArrayWithRange.md
index 2b7e40348..228c6fcaf 100644
--- a/snippets/initializeArrayWithRange.md
+++ b/snippets/initializeArrayWithRange.md
@@ -2,7 +2,7 @@
 
 Initializes an array containing the numbers in the specified range where `start` and `end` are inclusive with there common difference `step`.
 
-Use `Array(Math.ceil((end+1-start)/step)` to create an array of the desired length(the amounts of elements is equal to `(end-start)/step` or `(end+1-start)/step` for inclusive end), `Array.map()` to fill with the desired values in a range.
+Use `Array.from(Math.ceil((end+1-start)/step))` to create an array of the desired length(the amounts of elements is equal to `(end-start)/step` or `(end+1-start)/step` for inclusive end), `Array.map()` to fill with the desired values in a range.
 You can omit `start` to use a default value of `0`.
 You can omit `step` to use a default value of `1`.
 

From 76055670b439021606ef42abfe3dd15cd224c6fe Mon Sep 17 00:00:00 2001
From: 30secondsofcode <30secondsofcode@gmail.com>
Date: Fri, 5 Jan 2018 10:22:50 +0000
Subject: [PATCH 04/14] Travis build: 1035

---
 docs/mini.css | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/mini.css b/docs/mini.css
index 2a48b33cd..18774f99d 100644
--- a/docs/mini.css
+++ b/docs/mini.css
@@ -1 +1 @@
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var(--h-ratio))}h2{font-size:calc(1rem * var(--h-ratio) * var(--h-ratio) * var(--h-ratio))}h3{font-size:calc(1rem * var(--h-ratio) * var(--h-ratio))}h4{font-size:calc(1rem * var(--h-ratio))}h5{font-size:1rem}h6{font-size:calc(1rem / var(--h-ratio))}p{margin:var(--u-m)}ol,ul{margin:var(--u-m);padding-left:calc(2 * var(--u-m))}b,strong{font-weight:700}hr{box-sizing:content-box;border:0;line-height:1.25em;margin:var(--u-m);height:.0625rem;background:linear-gradient(to right, transparent, var(--br-col) 20%, var(--br-col) 80%, transparent)}blockquote{display:block;position:relative;font-style:italic;color:var(--f-col2);margin:var(--u-m);padding:calc(3 * var(--u-p));border:.0625rem solid var(--br-col2);border-left:.375rem solid var(--blq-col);border-radius:0 var(--u-br-r) var(--u-br-r) 0}blockquote:before{position:absolute;top:calc(0rem - var(--u-p));left:0;font-family:sans-serif;font-size:3rem;font-weight:700;content:"\201c";color:var(--blq-col)}blockquote[cite]:after{font-style:normal;font-size:.75em;font-weight:700;content:"\a—  " attr(cite);white-space:pre}code,kbd,pre,samp{font-family:Menlo, Consolas, monospace;font-size:.85em}code{background:var(--b-col2);border-radius:var(--u-br-r);padding:calc(var(--u-p) / 4) calc(var(--u-p) / 2)}kbd{background:var(--f-col);color:var(--b-col);border-radius:var(--u-br-r);padding:calc(var(--u-p) / 4) calc(var(--u-p) / 2)}pre{overflow:auto;background:var(--b-col2);padding:calc(1.5 * var(--u-p));margin:var(--u-m);border:.0625rem solid var(--br-col2);border-left:.25rem solid var(--pre-col);border-radius:0 var(--u-br-r) var(--u-br-r) 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#title{position:relative;top:-1rem}@media screen and (max-width: 500px){header #title{font-size:1rem;display:block}}header h1 small{display:block;font-size:0.875rem;color:#888;margin-top:-0.8rem}@media screen and (max-width: 768px){header h1 small{font-size:0.75rem}}@media screen and (max-width: 600px){header h1 small{font-size:0.625rem}}@media screen and (max-width: 500px){header h1 small{font-size:0.5rem;margin-top:-1.2rem}}label#menu-toggle{position:absolute;left:0.5rem;top:0.5rem;width:3.4375rem}main{padding:0}:root{--clps-lbl-b-col:#e8e8e8;--clps-lbl-f-col:#212121;--clps-lbl-h-b-col:#f0f0f0;--clps-sel-lbl-b-col:#ececec;--clps-br-col:#ddd;--clps-cnt-b-col:#fafafa;--clps-sel-lbl-br-col:#0277bd}label.collapse{width:100%;display:inline-block;cursor:pointer;box-sizing:border-box;transition:background 0.3s;color:var(--clps-lbl-f-col);background:var(--clps-lbl-b-col);border:.0625rem solid var(--clps-br-col);padding:calc(1.5 * var(--u-p));border-radius:var(--u-br-r)}label.collapse:hover,label.collapse:focus{background:var(--clps-lbl-h-b-col)}label.collapse+pre{box-sizing:border-box;height:0;max-height:1px;overflow:auto;margin:0;border:0;padding:0;transition:max-height 0.3s}label.collapse.toggled{background:var(--clps-sel-lbl-b-col);border-bottom-color:var(--clps-sel-lbl-br-col);border-bottom-left-radius:0;border-bottom-right-radius:0}label.collapse.toggled+pre{border-top-left-radius:0;border-top-right-radius:0;position:relative;width:100%;height:auto;border:.0625rem solid var(--clps-br-col);border-top:0;padding:calc(2 * var(--u-p));max-height:400px}button.primary.clipboard-copy{width:100%;margin-left:0}button.primary.clipboard-copy>img{vertical-align:bottom}code[class*="language-"],pre[class*="language-"]{color:#222;text-align:left;white-space:pre;word-spacing:normal;word-break:normal;word-wrap:normal;line-height:1.8;-moz-tab-size:2;-o-tab-size:2;tab-size:2;-webkit-hypens:none;-moz-hyphens:none;-ms-hyphens:none;hyphens:none}pre[class*="language-"]{padding:calc(2 * var(--u-p));overflow:auto;margin:var(--u-m) 0}pre[class*="language-"]::-moz-selection,pre[class*="language-"] ::-moz-selection,code[class*="language-"]::-moz-selection,code[class*="language-"] ::-moz-selection{background:#b3d4fc}pre[class*="language-"]::selection,pre[class*="language-"] ::selection,code[class*="language-"]::selection,code[class*="language-"] ::selection{background:#b3d4fc}:not(pre)>code[class*="language-"]{padding:.1em;border-radius:.3em;white-space:normal}.token.comment,.token.prolog,.token.doctype,.token.cdata{color:#7a8490}.token.punctuation{color:#666}.namespace{opacity:.7}.token.property,.token.tag,.token.boolean,.token.constant,.token.symbol,.token.deleted,.token.function{color:#005cc5}.token.number,.token.class-name{color:#832ed2}.token.selector,.token.attr-name,.token.string,.token.char,.token.builtin,.token.inserted{color:#067e36}.token.operator,.token.entity,.token.url,.language-css .token.string,.style .token.string,.token.atrule,.token.attr-value,.token.keyword{color:#d73a49}.token.regex{color:#097cab}.token.important,.token.variable{color:#e90}.token.important,.token.bold{font-weight:bold}.token.italic{font-style:italic}.token.entity{cursor:help}

From 8fb57618c7f9d34fa3fb705284f9b16e5094325e Mon Sep 17 00:00:00 2001
From: 30secondsofcode <30secondsofcode@gmail.com>
Date: Fri, 5 Jan 2018 10:25:27 +0000
Subject: [PATCH 05/14] Travis build: 1037

---
 README.md       | 2 +-
 docs/index.html | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index eb88d68c1..61b5b1d17 100644
--- a/README.md
+++ b/README.md
@@ -916,7 +916,7 @@ initialize2DArray(2, 2, 0); // [[0,0], [0,0]]
 
 Initializes an array containing the numbers in the specified range where `start` and `end` are inclusive with there common difference `step`.
 
-Use `Array(Math.ceil((end+1-start)/step)` to create an array of the desired length(the amounts of elements is equal to `(end-start)/step` or `(end+1-start)/step` for inclusive end), `Array.map()` to fill with the desired values in a range.
+Use `Array.from(Math.ceil((end+1-start)/step))` to create an array of the desired length(the amounts of elements is equal to `(end-start)/step` or `(end+1-start)/step` for inclusive end), `Array.map()` to fill with the desired values in a range.
 You can omit `start` to use a default value of `0`.
 You can omit `step` to use a default value of `1`.
 
diff --git a/docs/index.html b/docs/index.html
index b186768df..b9e7c9036 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -128,7 +128,7 @@ Object<span class="token punctuation">.</span><span class="token function">assig
     .</span><span class="token function">fill</span><span class="token punctuation">()
     .</span><span class="token function">map</span><span class="token punctuation">(()</span> <span class="token operator">=></span> <span class="token function">Array</span><span class="token punctuation">(</span>w<span class="token punctuation">).</span><span class="token function">fill</span><span class="token punctuation">(</span>val<span class="token punctuation">));</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">initialize2DArray</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">);</span> <span class="token comment">// [[0,0], [0,0]]</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="initializearraywithrange" class="section double-padded">initializeArrayWithRange</h3><div class="section double-padded"><p>Initializes an array containing the numbers in the specified range where <code>start</code> and <code>end</code> are inclusive with there common difference <code>step</code>.</p><p>Use <code>Array(Math.ceil((end+1-start)/step)</code> to create an array of the desired length(the amounts of elements is equal to <code>(end-start)/step</code> or <code>(end+1-start)/step</code> for inclusive end), <code>Array.map()</code> to fill with the desired values in a range. You can omit <code>start</code> to use a default value of <code>0</code>. You can omit <code>step</code> to use a default value of <code>1</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">initializeArrayWithRange</span> <span class="token operator">=</span> <span class="token punctuation">(</span>end<span class="token punctuation">,</span> start <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">,</span> step <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">=></span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="initializearraywithrange" class="section double-padded">initializeArrayWithRange</h3><div class="section double-padded"><p>Initializes an array containing the numbers in the specified range where <code>start</code> and <code>end</code> are inclusive with there common difference <code>step</code>.</p><p>Use <code>Array.from(Math.ceil((end+1-start)/step))</code> to create an array of the desired length(the amounts of elements is equal to <code>(end-start)/step</code> or <code>(end+1-start)/step</code> for inclusive end), <code>Array.map()</code> to fill with the desired values in a range. You can omit <code>start</code> to use a default value of <code>0</code>. You can omit <code>step</code> to use a default value of <code>1</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">initializeArrayWithRange</span> <span class="token operator">=</span> <span class="token punctuation">(</span>end<span class="token punctuation">,</span> start <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">,</span> step <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">=></span>
   Array<span class="token punctuation">.</span><span class="token keyword">from</span><span class="token punctuation">({</span> length<span class="token punctuation">:</span> Math<span class="token punctuation">.</span><span class="token function">ceil</span><span class="token punctuation">((</span>end <span class="token operator">+</span> <span class="token number">1</span> <span class="token operator">-</span> start<span class="token punctuation">)</span> <span class="token operator">/</span> step<span class="token punctuation">) }).</span><span class="token function">map</span><span class="token punctuation">((</span>v<span class="token punctuation">,</span> i<span class="token punctuation">)</span> <span class="token operator">=></span> i <span class="token operator">*</span> step <span class="token operator">+</span> start<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">initializeArrayWithRange</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">);</span> <span class="token comment">// [0,1,2,3,4,5]</span>
 <span class="token function">initializeArrayWithRange</span><span class="token punctuation">(</span><span class="token number">7</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">);</span> <span class="token comment">// [3,4,5,6,7]</span>

From d372b74b027c86fa1293533d933224d5379c7692 Mon Sep 17 00:00:00 2001
From: Les <iamiamiamles@gmail.com>
Date: Fri, 5 Jan 2018 11:38:34 +0000
Subject: [PATCH 06/14] If using ES6, use template litorals

Probably being pernickety.  But if we're using ES6, you could just use a template litoral instead of string concat? Not sure if the litoral version is a bit more difficult to read mind you.
---
 snippets/digitize.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/digitize.md b/snippets/digitize.md
index 60f636847..769b4e60c 100644
--- a/snippets/digitize.md
+++ b/snippets/digitize.md
@@ -6,7 +6,7 @@ Convert the number to a string, using spread operators in ES6(`[...string]`) bui
 Use `Array.map()` and `parseInt()` to transform each value to an integer.
 
 ```js
-const digitize = n => [...('' + n)].map(i => parseInt(i));
+const digitize = n => [...(`${n}`)].map(i => parseInt(i));
 ```
 
 ```js

From f91b28d3fc130fe50a186d78910f20ecc489d1fc Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 5 Jan 2018 14:35:43 +0200
Subject: [PATCH 07/14] Added multi-tagging (#159)

Updated all scripts to deal with multiple tags, the only thing missing is to actually multi-tag all snippets retroactively.
---
 advanced.svg                  |  1 +
 docs/mini/flavor.scss         |  8 ++++++++
 scripts/build.js              | 24 +++++++++++++++++-------
 scripts/tag.js                | 12 ++++++++----
 scripts/web.js                | 28 +++++++++++++++++-----------
 static-parts/README-start.md  |  2 +-
 static-parts/index-start.html | 14 +++++++++-----
 7 files changed, 61 insertions(+), 28 deletions(-)
 create mode 100644 advanced.svg

diff --git a/advanced.svg b/advanced.svg
new file mode 100644
index 000000000..428312a3c
--- /dev/null
+++ b/advanced.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="78" height="20"><linearGradient id="b" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="a"><rect height="20" rx="3" fill="#fff" width="64"/></clipPath><g clip-path="url(#a)"><path fill="#555" d="M0 0h65v20H0z"/></g><g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="110"><text x="325" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="530">advanced</text><text x="325" y="140" transform="scale(.1)" textLength="530">advanced</text></g> </svg>
diff --git a/docs/mini/flavor.scss b/docs/mini/flavor.scss
index 19f8851a5..b3e3f11c0 100644
--- a/docs/mini/flavor.scss
+++ b/docs/mini/flavor.scss
@@ -131,6 +131,8 @@ $_drawer-right: false;
 
 @import 'navigation';
 
+$mark-back-color: #424242;
+$mark-font-size: 0.5em;
 
 $toast-back-color:       #212121;
 
@@ -163,6 +165,12 @@ $_include-collapse: false;
   transition: opacity 0.3s ease-in-out;
 }
 
+mark {
+  position: relative;
+  top: -0.25rem;
+  left: 0.25rem;
+}
+
 /*
   Custom elements for contextual background elements, toasts and tooltips.
 */
diff --git a/scripts/build.js b/scripts/build.js
index 1b9a464a6..292a214f4 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -73,7 +73,11 @@ try {
       .readFileSync('tag_database', 'utf8')
       .split('\n')
       .slice(0, -1)
-      .map(v => v.split(':').slice(0, 2))
+      .map(v => {
+        let data = v.split(':').slice(0, 2);
+        data[1] = data[1].split(',').map(t => t.trim());
+        return data;
+      })
   );
 } catch (err) {
   console.log(`${chalk.red('ERROR!')} During tag database loading: ${err}`);
@@ -85,7 +89,7 @@ try {
   const tags = [
     ...new Set(
       Object.entries(tagDbData)
-        .map(t => t[1])
+        .map(t => t[1][0])
         .filter(v => v)
         .sort((a, b) => a.localeCompare(b))
     )
@@ -101,7 +105,7 @@ try {
 
     if (capitalizedTag === 'Uncategorized') {
       uncategorizedOutput += `### _${capitalizedTag}_\n\n<details>\n<summary>View contents</summary>\n\n`;
-      for (const taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag)) {
+      for (const taggedSnippet of Object.entries(tagDbData).filter(v => v[1][0] === tag)) {
         uncategorizedOutput += `* [\`${taggedSnippet[0]}\`](#${taggedSnippet[0].toLowerCase()})\n`;
       }
       uncategorizedOutput += '\n</details>\n\n';
@@ -109,7 +113,7 @@ try {
       output += `### ${
         EMOJIS[tag] || ''
       } ${capitalizedTag}\n\n<details>\n<summary>View contents</summary>\n\n`;
-      for (const taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag)) {
+      for (const taggedSnippet of Object.entries(tagDbData).filter(v => v[1][0] === tag)) {
         output += `* [\`${taggedSnippet[0]}\`](#${taggedSnippet[0].toLowerCase()})\n`;
       }
       output += '\n</details>\n\n';
@@ -122,17 +126,23 @@ try {
   // Loop over tags and snippets to create the list of snippets
   for (const tag of tags) {
     const capitalizedTag = capitalize(tag, true);
-
+    // ![advanced](/advanced.svg)
     if (capitalizedTag == 'Uncategorized') {
       uncategorizedOutput += `---\n ## _${capitalizedTag}_\n`;
-      for (const taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag)) {
+      for (const taggedSnippet of Object.entries(tagDbData).filter(v => v[1][0] === tag)) {
         uncategorizedOutput += `\n${snippets[taggedSnippet[0] + '.md'] +
           '\n<br>[⬆ back to top](#table-of-contents)\n\n'}`;
       }
     } else {
       output += `---\n ## ${EMOJIS[tag] || ''} ${capitalizedTag}\n`;
-      for (const taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag)) {
+      for (const taggedSnippet of Object.entries(tagDbData).filter(v => v[1][0] === tag)) {
         let data = snippets[taggedSnippet[0] + '.md'];
+        // Add advanced tag 
+        if(taggedSnippet[1].includes('advanced')){
+          data = data.split(/\r?\n/);
+          data[0] = data[0] +' ![advanced](/advanced.svg)';
+          data = data.join('\n');
+        }
         data =
           data.slice(0, data.lastIndexOf('```js')) +
           '<details>\n<summary>Examples</summary>\n\n' +
diff --git a/scripts/tag.js b/scripts/tag.js
index bf57fd7cf..c3dd9aa64 100644
--- a/scripts/tag.js
+++ b/scripts/tag.js
@@ -50,10 +50,14 @@ try {
       .readFileSync('tag_database', 'utf8')
       .split('\n')
       .slice(0, -1)
-      .map(v => v.split(':').slice(0, 2))
+      .map(v => {
+        let data = v.split(':').slice(0, 2);
+        data[1] = data[1].split(',').map(t => t.trim());
+        return data;
+      })
   );
   tagDbStats = Object.entries(tagDbData)
-    .sort((a, b) => a[1].localeCompare(b[1]))
+    .sort((a, b) => a[1][0].localeCompare(b[1][0]))
     .reduce((acc, val) => {
       acc.hasOwnProperty(val[1]) ? acc[val[1]]++ : (acc[val[1]] = 1);
       return acc;
@@ -68,9 +72,9 @@ try {
   for (let snippet of Object.entries(snippets))
     if (
       tagDbData.hasOwnProperty(snippet[0].slice(0, -3)) &&
-      tagDbData[snippet[0].slice(0, -3)].trim()
+      tagDbData[snippet[0].slice(0, -3)].join(',').trim()
     )
-      output += `${snippet[0].slice(0, -3)}:${tagDbData[snippet[0].slice(0, -3)].trim()}\n`;
+      output += `${snippet[0].slice(0, -3)}:${tagDbData[snippet[0].slice(0, -3)].join(',').trim()}\n`;
     else {
       output += `${snippet[0].slice(0, -3)}:uncategorized\n`;
       missingTags++;
diff --git a/scripts/web.js b/scripts/web.js
index eeb848d9b..6b86c7683 100644
--- a/scripts/web.js
+++ b/scripts/web.js
@@ -61,7 +61,7 @@ const objectFromPairs = arr => arr.reduce((a, v) => ((a[v[0]] = v[1]), a), {});
 const capitalize = (str, lowerRest = false) =>
   str.slice(0, 1).toUpperCase() + (lowerRest ? str.slice(1).toLowerCase() : str.slice(1));
 // Start the timer of the script
-console.time('Builder');
+console.time('Webber');
 // Synchronously read all snippets and sort them as necessary (case-insensitive)
 try {
   let snippetFilenames = fs.readdirSync(snippetsPath);
@@ -96,7 +96,11 @@ try {
       .readFileSync('tag_database', 'utf8')
       .split('\n')
       .slice(0, -1)
-      .map(v => v.split(':').slice(0, 2))
+      .map(v => {
+        let data = v.split(':').slice(0, 2);
+        data[1] = data[1].split(',').map(t => t.trim());
+        return data;
+      })
   );
 } catch (err) {
   // Handle errors (hopefully not!)
@@ -109,7 +113,7 @@ try {
   output += `${startPart + '\n'}`;
   let uncategorizedOutput = '';
   // Loop over tags and snippets to create the table of contents
-  for (let tag of [...new Set(Object.entries(tagDbData).map(t => t[1]))]
+  for (let tag of [...new Set(Object.entries(tagDbData).map(t => t[1][0]))]
     .filter(v => v)
     .sort((a, b) => a.localeCompare(b))) {
     if (capitalize(tag, true) == 'Uncategorized') {
@@ -120,12 +124,12 @@ try {
           .replace(/<p>/g, '')
           .replace(/<\/p>/g, '') +
         `</h3>`;
-      for (let taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag))
+      for (let taggedSnippet of Object.entries(tagDbData).filter(v => v[1][0] === tag))
         uncategorizedOutput += md
           .render(`[${taggedSnippet[0]}](#${taggedSnippet[0].toLowerCase()})\n`)
           .replace(/<p>/g, '')
           .replace(/<\/p>/g, '')
-          .replace(/<a/g, '<a class="sublink-1"');
+          .replace(/<a/g, `<a class="sublink-1" tags="${taggedSnippet[1].join(',')}"`);
       uncategorizedOutput += '\n';
     } else {
       output +=
@@ -135,12 +139,12 @@ try {
           .replace(/<p>/g, '')
           .replace(/<\/p>/g, '') +
         `</h3>`;
-      for (let taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag))
+      for (let taggedSnippet of Object.entries(tagDbData).filter(v => v[1][0] === tag))
         output += md
           .render(`[${taggedSnippet[0]}](#${taggedSnippet[0].toLowerCase()})\n`)
           .replace(/<p>/g, '')
           .replace(/<\/p>/g, '')
-          .replace(/<a/g, '<a class="sublink-1"');
+          .replace(/<a/g, `<a class="sublink-1" tags="${taggedSnippet[1].join(',')}"`);
       output += '\n';
     }
   }
@@ -149,19 +153,20 @@ try {
   output += `<a id="top">&nbsp;</a>`;
   uncategorizedOutput = '';
   // Loop over tags and snippets to create the list of snippets
-  for (let tag of [...new Set(Object.entries(tagDbData).map(t => t[1]))]
+  for (let tag of [...new Set(Object.entries(tagDbData).map(t => t[1][0]))]
     .filter(v => v)
     .sort((a, b) => a.localeCompare(b))) {
     if (capitalize(tag, true) == 'Uncategorized') {
       uncategorizedOutput += md
         .render(`## ${capitalize(tag, true)}\n`)
         .replace(/<h2>/g, '<h2 style="text-align:center;">');
-      for (let taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag))
+      for (let taggedSnippet of Object.entries(tagDbData).filter(v => v[1][0] === tag))
         uncategorizedOutput +=
           '<div class="card fluid">' +
           md
             .render(`\n${snippets[taggedSnippet[0] + '.md']}`)
             .replace(/<h3/g, `<h3 id="${taggedSnippet[0].toLowerCase()}" class="section double-padded"`)
+            .replace(/<\/h3>/g, `${taggedSnippet[1].includes('advanced')?'<mark class="tag">advanced</mark>':''}</h3>`)
             .replace(/<pre><code class="language-js">([^\0]*?)<\/code><\/pre>/gm, (match, p1) => `<pre class="language-js">${Prism.highlight(unescapeHTML(p1), Prism.languages.javascript)}</pre>`)
             .replace(/<\/pre>\s+<pre/g, '</pre><label class="collapse">Show examples</label><pre') +
           '<button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button>' +
@@ -170,12 +175,13 @@ try {
       output += md
         .render(`## ${capitalize(tag, true)}\n`)
         .replace(/<h2>/g, '<h2 style="text-align:center;">');
-      for (let taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag))
+      for (let taggedSnippet of Object.entries(tagDbData).filter(v => v[1][0] === tag))
         output +=
           '<div class="card fluid">' +
           md
             .render(`\n${snippets[taggedSnippet[0] + '.md']}`)
             .replace(/<h3/g, `<h3 id="${taggedSnippet[0].toLowerCase()}" class="section double-padded"`)
+            .replace(/<\/h3>/g, `${taggedSnippet[1].includes('advanced')?'<mark class="tag">advanced</mark>':''}</h3>`)
             .replace(/<\/h3>/g, '</h3><div class="section double-padded">')
             .replace(/<pre><code class="language-js">([^\0]*?)<\/code><\/pre>/gm, (match, p1) => `<pre class="language-js">${Prism.highlight(unescapeHTML(p1), Prism.languages.javascript)}</pre>`)
             .replace(/<\/pre>\s+<pre/g, '</pre><label class="collapse">Show examples</label><pre') +
@@ -247,4 +253,4 @@ try {
 // Log a success message
 console.log(`${chalk.green('SUCCESS!')} index.html file generated!`);
 // Log the time taken
-console.timeEnd('Builder');
+console.timeEnd('Webber');
diff --git a/static-parts/README-start.md b/static-parts/README-start.md
index 105049b76..fc7589866 100644
--- a/static-parts/README-start.md
+++ b/static-parts/README-start.md
@@ -18,7 +18,7 @@
 
 ⚠️ **WARNING:** Snippets are not production ready.
 
-You can find a package with all the snippets on [npm](https://www.npmjs.com/package/30-seconds-of-code). 
+You can find a package with all the snippets on [npm](https://www.npmjs.com/package/30-seconds-of-code).
 
 ```
 npm install 30-seconds-of-code
diff --git a/static-parts/index-start.html b/static-parts/index-start.html
index 66e981ad9..00bbe441b 100644
--- a/static-parts/index-start.html
+++ b/static-parts/index-start.html
@@ -14,13 +14,17 @@
     <link rel="icon" type="image/png" href="favicon.png">
     <script>
       const search = (node) => {
+        let matchingTags = [];
         Array.from(node.parentElement.parentElement.getElementsByTagName('a')).forEach(x => {
-          x.style.display = x.getAttribute("href").toUpperCase().indexOf(node.value.toUpperCase()) + 1  ? '' : 'none'
+          let data = [x.innerText.toLowerCase(), ...x.getAttribute('tags').split(',')].map(v => !!(v.indexOf(node.value.toLowerCase()) + 1));
+          if(data.includes(true)){
+            x.style.display = '';
+            matchingTags.push(x.getAttribute('tags').split(',')[0]);
+          }
+          else x.style.display = 'none';
         });
-        Array.from( node.parentElement.parentElement.children )
-        .filter( x => !( x.tagName == 'A' && x.style.display == 'none' ) )
-        .forEach( ( element, index, source) => {
-           element.style.display = (element.tagName == 'H3' && index + 1 == source.length ? 'none' : element.tagName == 'H3' && source[index + 1].tagName == 'H3' ? 'none'  : '')
+        Array.from(node.parentElement.parentElement.getElementsByTagName('h3')).forEach(x => {
+          x.style.display = matchingTags.includes(x.innerText.toLowerCase()) ? '' : 'none';
         })
       }
       function loader() {

From 5966ac8d1df11da365b2ad0fb92a57a40cbd181b Mon Sep 17 00:00:00 2001
From: 30secondsofcode <30secondsofcode@gmail.com>
Date: Fri, 5 Jan 2018 12:36:59 +0000
Subject: [PATCH 08/14] Travis build: 1039

---
 README.md       |  2 +-
 docs/index.html | 16 ++++++++++------
 docs/mini.css   |  2 +-
 3 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/README.md b/README.md
index 61b5b1d17..ad6b25b19 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@
 
 ⚠️ **WARNING:** Snippets are not production ready.
 
-You can find a package with all the snippets on [npm](https://www.npmjs.com/package/30-seconds-of-code). 
+You can find a package with all the snippets on [npm](https://www.npmjs.com/package/30-seconds-of-code).
 
 ```
 npm install 30-seconds-of-code
diff --git a/docs/index.html b/docs/index.html
index b9e7c9036..6f76914f9 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -1,11 +1,15 @@
 <!DOCTYPE html><html lang="en"><head><link rel="stylesheet" href="./mini.css"><title>30 seconds of code</title><meta charset="utf-8"><meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."><meta name="keywords" content="javascript, snippets, code, programming"><meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)"><meta name="viewport" content="width=device-width,initial-scale=1"><meta property="og:title" content="30 seconds of code"><meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."/><meta property="og:type" content="website"/><meta property="og:image" content="favicon.png"><link rel="icon" type="image/png" href="favicon.png"><script>const search = (node) => {
+        let matchingTags = [];
         Array.from(node.parentElement.parentElement.getElementsByTagName('a')).forEach(x => {
-          x.style.display = x.getAttribute("href").toUpperCase().indexOf(node.value.toUpperCase()) + 1  ? '' : 'none'
+          let data = [x.innerText.toLowerCase(), ...x.getAttribute('tags').split(',')].map(v => !!(v.indexOf(node.value.toLowerCase()) + 1));
+          if(data.includes(true)){
+            x.style.display = '';
+            matchingTags.push(x.getAttribute('tags').split(',')[0]);
+          }
+          else x.style.display = 'none';
         });
-        Array.from( node.parentElement.parentElement.children )
-        .filter( x => !( x.tagName == 'A' && x.style.display == 'none' ) )
-        .forEach( ( element, index, source) => {
-           element.style.display = (element.tagName == 'H3' && index + 1 == source.length ? 'none' : element.tagName == 'H3' && source[index + 1].tagName == 'H3' ? 'none'  : '')
+        Array.from(node.parentElement.parentElement.getElementsByTagName('h3')).forEach(x => {
+          x.style.display = matchingTags.includes(x.innerText.toLowerCase()) ? '' : 'none';
         })
       }
       function loader() {
@@ -36,7 +40,7 @@
             },1700);
           }
         }, false);
-      }</script></head><body onload="loader()"><a href="https://github.com/Chalarangelo/30-seconds-of-code" class="github-corner" aria-label="View source on Github"><svg width="90" height="90" viewBox="0 0 250 250" style="fill:#151513;color:#fff;position:absolute;top:0;border:0;right:0" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin:130px 106px" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style><header style="height:5.5rem"><h1 class="logo"><img src="favicon.png" style="height:4rem" alt="logo"/><span id="title">&nbsp;30 seconds of code</span> <small>Curated collection of useful JavaScript snippets that you can understand in 30 seconds or less.</small></h1><label for="doc-drawer-checkbox" class="button drawer-toggle" id="menu-toggle"></label></header><div class="row" style="height:calc(100vh - 5.875rem);overflow:hidden"><input id="doc-drawer-checkbox" class="drawer" value="on" type="checkbox"><nav class="col-md-4 col-lg-3" style="border-top:0"><div class="group"><input class="search" type="text" id="searchInput" onkeyup="search(this)"><label id="search-label">Search for snippet...</label></div><label for="doc-drawer-checkbox" class="button drawer-close"></label><h3>Adapter</h3><a class="sublink-1" href="#call">call</a> <a class="sublink-1" href="#collectinto">collectInto</a> <a class="sublink-1" href="#flip">flip</a> <a class="sublink-1" href="#pipefunctions">pipeFunctions</a> <a class="sublink-1" href="#promisify">promisify</a> <a class="sublink-1" href="#spreadover">spreadOver</a><h3>Array</h3><a class="sublink-1" href="#chunk">chunk</a> <a class="sublink-1" href="#compact">compact</a> <a class="sublink-1" href="#countoccurrences">countOccurrences</a> <a class="sublink-1" href="#deepflatten">deepFlatten</a> <a class="sublink-1" href="#difference">difference</a> <a class="sublink-1" href="#differencewith">differenceWith</a> <a class="sublink-1" href="#distinctvaluesofarray">distinctValuesOfArray</a> <a class="sublink-1" href="#dropelements">dropElements</a> <a class="sublink-1" href="#dropright">dropRight</a> <a class="sublink-1" href="#everynth">everyNth</a> <a class="sublink-1" href="#filternonunique">filterNonUnique</a> <a class="sublink-1" href="#flatten">flatten</a> <a class="sublink-1" href="#flattendepth">flattenDepth</a> <a class="sublink-1" href="#groupby">groupBy</a> <a class="sublink-1" href="#head">head</a> <a class="sublink-1" href="#initial">initial</a> <a class="sublink-1" href="#initialize2darray">initialize2DArray</a> <a class="sublink-1" href="#initializearraywithrange">initializeArrayWithRange</a> <a class="sublink-1" href="#initializearraywithvalues">initializeArrayWithValues</a> <a class="sublink-1" href="#intersection">intersection</a> <a class="sublink-1" href="#issorted">isSorted</a> <a class="sublink-1" href="#join">join</a> <a class="sublink-1" href="#last">last</a> <a class="sublink-1" href="#mapobject">mapObject</a> <a class="sublink-1" href="#maxn">maxN</a> <a class="sublink-1" href="#minn">minN</a> <a class="sublink-1" href="#nthelement">nthElement</a> <a class="sublink-1" href="#pick">pick</a> <a class="sublink-1" href="#pull">pull</a> <a class="sublink-1" href="#pullatindex">pullAtIndex</a> <a class="sublink-1" href="#pullatvalue">pullAtValue</a> <a class="sublink-1" href="#quicksort">quickSort</a> <a class="sublink-1" href="#reducedfilter">reducedFilter</a> <a class="sublink-1" href="#remove">remove</a> <a class="sublink-1" href="#sample">sample</a> <a class="sublink-1" href="#samplesize">sampleSize</a> <a class="sublink-1" href="#shuffle">shuffle</a> <a class="sublink-1" href="#similarity">similarity</a> <a class="sublink-1" href="#sortedindex">sortedIndex</a> <a class="sublink-1" href="#symmetricdifference">symmetricDifference</a> <a class="sublink-1" href="#tail">tail</a> <a class="sublink-1" href="#take">take</a> <a class="sublink-1" href="#takeright">takeRight</a> <a class="sublink-1" href="#union">union</a> <a class="sublink-1" href="#without">without</a> <a class="sublink-1" href="#zip">zip</a> <a class="sublink-1" href="#zipobject">zipObject</a><h3>Browser</h3><a class="sublink-1" href="#arraytohtmllist">arrayToHtmlList</a> <a class="sublink-1" href="#bottomvisible">bottomVisible</a> <a class="sublink-1" href="#copytoclipboard">copyToClipboard</a> <a class="sublink-1" href="#currenturl">currentURL</a> <a class="sublink-1" href="#detectdevicetype">detectDeviceType</a> <a class="sublink-1" href="#elementisvisibleinviewport">elementIsVisibleInViewport</a> <a class="sublink-1" href="#getscrollposition">getScrollPosition</a> <a class="sublink-1" href="#getstyle">getStyle</a> <a class="sublink-1" href="#hasclass">hasClass</a> <a class="sublink-1" href="#hide">hide</a> <a class="sublink-1" href="#httpsredirect">httpsRedirect</a> <a class="sublink-1" href="#onuserinputchange">onUserInputChange</a> <a class="sublink-1" href="#redirect">redirect</a> <a class="sublink-1" href="#runasync">runAsync</a> <a class="sublink-1" href="#scrolltotop">scrollToTop</a> <a class="sublink-1" href="#setstyle">setStyle</a> <a class="sublink-1" href="#show">show</a> <a class="sublink-1" href="#speechsynthesis">speechSynthesis</a> <a class="sublink-1" href="#toggleclass">toggleClass</a> <a class="sublink-1" href="#uuidgeneratorbrowser">UUIDGeneratorBrowser</a><h3>Date</h3><a class="sublink-1" href="#formatduration">formatDuration</a> <a class="sublink-1" href="#getdaysdiffbetweendates">getDaysDiffBetweenDates</a> <a class="sublink-1" href="#jsontodate">JSONToDate</a> <a class="sublink-1" href="#toenglishdate">toEnglishDate</a> <a class="sublink-1" href="#tomorrow">tomorrow</a><h3>Function</h3><a class="sublink-1" href="#chainasync">chainAsync</a> <a class="sublink-1" href="#compose">compose</a> <a class="sublink-1" href="#curry">curry</a> <a class="sublink-1" href="#defer">defer</a> <a class="sublink-1" href="#functionname">functionName</a> <a class="sublink-1" href="#memoize">memoize</a> <a class="sublink-1" href="#once">once</a> <a class="sublink-1" href="#runpromisesinseries">runPromisesInSeries</a> <a class="sublink-1" href="#sleep">sleep</a><h3>Logic</h3><a class="sublink-1" href="#negate">negate</a><h3>Math</h3><a class="sublink-1" href="#average">average</a> <a class="sublink-1" href="#clampnumber">clampNumber</a> <a class="sublink-1" href="#collatz">collatz</a> <a class="sublink-1" href="#digitize">digitize</a> <a class="sublink-1" href="#distance">distance</a> <a class="sublink-1" href="#elo">elo</a> <a class="sublink-1" href="#factorial">factorial</a> <a class="sublink-1" href="#factors">factors</a> <a class="sublink-1" href="#fibonacci">fibonacci</a> <a class="sublink-1" href="#fibonaccicountuntilnum">fibonacciCountUntilNum</a> <a class="sublink-1" href="#fibonacciuntilnum">fibonacciUntilNum</a> <a class="sublink-1" href="#gcd">gcd</a> <a class="sublink-1" href="#geometricprogression">geometricProgression</a> <a class="sublink-1" href="#hammingdistance">hammingDistance</a> <a class="sublink-1" href="#howmanytimes">howManyTimes</a> <a class="sublink-1" href="#inrange">inRange</a> <a class="sublink-1" href="#isarmstrongnumber">isArmstrongNumber</a> <a class="sublink-1" href="#isdivisible">isDivisible</a> <a class="sublink-1" href="#iseven">isEven</a> <a class="sublink-1" href="#isprime">isPrime</a> <a class="sublink-1" href="#lcm">lcm</a> <a class="sublink-1" href="#luhncheck">luhnCheck</a> <a class="sublink-1" href="#median">median</a> <a class="sublink-1" href="#percentile">percentile</a> <a class="sublink-1" href="#powerset">powerset</a> <a class="sublink-1" href="#primes">primes</a> <a class="sublink-1" href="#randomintegerinrange">randomIntegerInRange</a> <a class="sublink-1" href="#randomnumberinrange">randomNumberInRange</a> <a class="sublink-1" href="#round">round</a> <a class="sublink-1" href="#solverpn">solveRPN</a> <a class="sublink-1" href="#standarddeviation">standardDeviation</a> <a class="sublink-1" href="#sum">sum</a> <a class="sublink-1" href="#sumpower">sumPower</a><h3>Node</h3><a class="sublink-1" href="#hasflags">hasFlags</a> <a class="sublink-1" href="#istravisci">isTravisCI</a> <a class="sublink-1" href="#jsontofile">JSONToFile</a> <a class="sublink-1" href="#readfilelines">readFileLines</a> <a class="sublink-1" href="#untildify">untildify</a> <a class="sublink-1" href="#uuidgeneratornode">UUIDGeneratorNode</a><h3>Object</h3><a class="sublink-1" href="#cleanobj">cleanObj</a> <a class="sublink-1" href="#invertkeyvalues">invertKeyValues</a> <a class="sublink-1" href="#lowercasekeys">lowercaseKeys</a> <a class="sublink-1" href="#objectfrompairs">objectFromPairs</a> <a class="sublink-1" href="#objecttopairs">objectToPairs</a> <a class="sublink-1" href="#orderby">orderBy</a> <a class="sublink-1" href="#select">select</a> <a class="sublink-1" href="#shallowclone">shallowClone</a> <a class="sublink-1" href="#size">size</a> <a class="sublink-1" href="#truthcheckcollection">truthCheckCollection</a><h3>String</h3><a class="sublink-1" href="#anagrams">anagrams</a> <a class="sublink-1" href="#bytesize">byteSize</a> <a class="sublink-1" href="#capitalize">capitalize</a> <a class="sublink-1" href="#capitalizeeveryword">capitalizeEveryWord</a> <a class="sublink-1" href="#countvowels">countVowels</a> <a class="sublink-1" href="#escapehtml">escapeHTML</a> <a class="sublink-1" href="#escaperegexp">escapeRegExp</a> <a class="sublink-1" href="#fromcamelcase">fromCamelCase</a> <a class="sublink-1" href="#isabsoluteurl">isAbsoluteURL</a> <a class="sublink-1" href="#mask">mask</a> <a class="sublink-1" href="#palindrome">palindrome</a> <a class="sublink-1" href="#pluralize">pluralize</a> <a class="sublink-1" href="#repeatstring">repeatString</a> <a class="sublink-1" href="#reversestring">reverseString</a> <a class="sublink-1" href="#sortcharactersinstring">sortCharactersInString</a> <a class="sublink-1" href="#splitlines">splitLines</a> <a class="sublink-1" href="#tocamelcase">toCamelCase</a> <a class="sublink-1" href="#tokebabcase">toKebabCase</a> <a class="sublink-1" href="#tosnakecase">toSnakeCase</a> <a class="sublink-1" href="#truncatestring">truncateString</a> <a class="sublink-1" href="#unescapehtml">unescapeHTML</a> <a class="sublink-1" href="#words">words</a><h3>Utility</h3><a class="sublink-1" href="#cloneregexp">cloneRegExp</a> <a class="sublink-1" href="#coalesce">coalesce</a> <a class="sublink-1" href="#coalescefactory">coalesceFactory</a> <a class="sublink-1" href="#extendhex">extendHex</a> <a class="sublink-1" href="#gettype">getType</a> <a class="sublink-1" href="#geturlparameters">getURLParameters</a> <a class="sublink-1" href="#hextorgb">hexToRGB</a> <a class="sublink-1" href="#isarray">isArray</a> <a class="sublink-1" href="#isarraylike">isArrayLike</a> <a class="sublink-1" href="#isboolean">isBoolean</a> <a class="sublink-1" href="#isfunction">isFunction</a> <a class="sublink-1" href="#isnull">isNull</a> <a class="sublink-1" href="#isnumber">isNumber</a> <a class="sublink-1" href="#isprimitive">isPrimitive</a> <a class="sublink-1" href="#ispromiselike">isPromiseLike</a> <a class="sublink-1" href="#isstring">isString</a> <a class="sublink-1" href="#issymbol">isSymbol</a> <a class="sublink-1" href="#isvalidjson">isValidJSON</a> <a class="sublink-1" href="#prettybytes">prettyBytes</a> <a class="sublink-1" href="#randomhexcolorcode">randomHexColorCode</a> <a class="sublink-1" href="#rgbtohex">RGBToHex</a> <a class="sublink-1" href="#sdbm">sdbm</a> <a class="sublink-1" href="#timetaken">timeTaken</a> <a class="sublink-1" href="#todecimalmark">toDecimalMark</a> <a class="sublink-1" href="#toordinalsuffix">toOrdinalSuffix</a> <a class="sublink-1" href="#validatenumber">validateNumber</a> <a class="sublink-1" href="#yesno">yesNo</a></nav><main class="col-sm-12 col-md-8 col-lg-9" style="height:100%;overflow-y:auto;background:#eceef2;padding:0"><a id="top">&nbsp;</a><h2 style="text-align:center">Adapter</h2><div class="card fluid"><h3 id="call" class="section double-padded">call</h3><div class="section double-padded"><p>Given a key and a set of arguments, call them when given a context. Primarily useful in composition.</p><p>Use a closure to call a stored key with stored arguments.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">call</span> <span class="token operator">=</span> <span class="token punctuation">(</span>key<span class="token punctuation">,</span> <span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> context <span class="token operator">=></span> context<span class="token punctuation">[</span>key<span class="token punctuation">](</span><span class="token operator">...</span>args<span class="token punctuation">);</span>
+      }</script></head><body onload="loader()"><a href="https://github.com/Chalarangelo/30-seconds-of-code" class="github-corner" aria-label="View source on Github"><svg width="90" height="90" viewBox="0 0 250 250" style="fill:#151513;color:#fff;position:absolute;top:0;border:0;right:0" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin:130px 106px" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style><header style="height:5.5rem"><h1 class="logo"><img src="favicon.png" style="height:4rem" alt="logo"/><span id="title">&nbsp;30 seconds of code</span> <small>Curated collection of useful JavaScript snippets that you can understand in 30 seconds or less.</small></h1><label for="doc-drawer-checkbox" class="button drawer-toggle" id="menu-toggle"></label></header><div class="row" style="height:calc(100vh - 5.875rem);overflow:hidden"><input id="doc-drawer-checkbox" class="drawer" value="on" type="checkbox"><nav class="col-md-4 col-lg-3" style="border-top:0"><div class="group"><input class="search" type="text" id="searchInput" onkeyup="search(this)"><label id="search-label">Search for snippet...</label></div><label for="doc-drawer-checkbox" class="button drawer-close"></label><h3>Adapter</h3><a class="sublink-1" tags="adapter" href="#call">call</a> <a class="sublink-1" tags="adapter" href="#collectinto">collectInto</a> <a class="sublink-1" tags="adapter" href="#flip">flip</a> <a class="sublink-1" tags="adapter" href="#pipefunctions">pipeFunctions</a> <a class="sublink-1" tags="adapter" href="#promisify">promisify</a> <a class="sublink-1" tags="adapter" href="#spreadover">spreadOver</a><h3>Array</h3><a class="sublink-1" tags="array" href="#chunk">chunk</a> <a class="sublink-1" tags="array" href="#compact">compact</a> <a class="sublink-1" tags="array" href="#countoccurrences">countOccurrences</a> <a class="sublink-1" tags="array" href="#deepflatten">deepFlatten</a> <a class="sublink-1" tags="array" href="#difference">difference</a> <a class="sublink-1" tags="array" href="#differencewith">differenceWith</a> <a class="sublink-1" tags="array" href="#distinctvaluesofarray">distinctValuesOfArray</a> <a class="sublink-1" tags="array" href="#dropelements">dropElements</a> <a class="sublink-1" tags="array" href="#dropright">dropRight</a> <a class="sublink-1" tags="array" href="#everynth">everyNth</a> <a class="sublink-1" tags="array" href="#filternonunique">filterNonUnique</a> <a class="sublink-1" tags="array" href="#flatten">flatten</a> <a class="sublink-1" tags="array" href="#flattendepth">flattenDepth</a> <a class="sublink-1" tags="array" href="#groupby">groupBy</a> <a class="sublink-1" tags="array" href="#head">head</a> <a class="sublink-1" tags="array" href="#initial">initial</a> <a class="sublink-1" tags="array" href="#initialize2darray">initialize2DArray</a> <a class="sublink-1" tags="array" href="#initializearraywithrange">initializeArrayWithRange</a> <a class="sublink-1" tags="array" href="#initializearraywithvalues">initializeArrayWithValues</a> <a class="sublink-1" tags="array" href="#intersection">intersection</a> <a class="sublink-1" tags="array" href="#issorted">isSorted</a> <a class="sublink-1" tags="array" href="#join">join</a> <a class="sublink-1" tags="array" href="#last">last</a> <a class="sublink-1" tags="array" href="#mapobject">mapObject</a> <a class="sublink-1" tags="array" href="#maxn">maxN</a> <a class="sublink-1" tags="array" href="#minn">minN</a> <a class="sublink-1" tags="array" href="#nthelement">nthElement</a> <a class="sublink-1" tags="array" href="#pick">pick</a> <a class="sublink-1" tags="array" href="#pull">pull</a> <a class="sublink-1" tags="array" href="#pullatindex">pullAtIndex</a> <a class="sublink-1" tags="array" href="#pullatvalue">pullAtValue</a> <a class="sublink-1" tags="array" href="#quicksort">quickSort</a> <a class="sublink-1" tags="array" href="#reducedfilter">reducedFilter</a> <a class="sublink-1" tags="array" href="#remove">remove</a> <a class="sublink-1" tags="array" href="#sample">sample</a> <a class="sublink-1" tags="array" href="#samplesize">sampleSize</a> <a class="sublink-1" tags="array" href="#shuffle">shuffle</a> <a class="sublink-1" tags="array" href="#similarity">similarity</a> <a class="sublink-1" tags="array" href="#sortedindex">sortedIndex</a> <a class="sublink-1" tags="array" href="#symmetricdifference">symmetricDifference</a> <a class="sublink-1" tags="array" href="#tail">tail</a> <a class="sublink-1" tags="array" href="#take">take</a> <a class="sublink-1" tags="array" href="#takeright">takeRight</a> <a class="sublink-1" tags="array" href="#union">union</a> <a class="sublink-1" tags="array" href="#without">without</a> <a class="sublink-1" tags="array" href="#zip">zip</a> <a class="sublink-1" tags="array" href="#zipobject">zipObject</a><h3>Browser</h3><a class="sublink-1" tags="browser" href="#arraytohtmllist">arrayToHtmlList</a> <a class="sublink-1" tags="browser" href="#bottomvisible">bottomVisible</a> <a class="sublink-1" tags="browser" href="#copytoclipboard">copyToClipboard</a> <a class="sublink-1" tags="browser" href="#currenturl">currentURL</a> <a class="sublink-1" tags="browser" href="#detectdevicetype">detectDeviceType</a> <a class="sublink-1" tags="browser" href="#elementisvisibleinviewport">elementIsVisibleInViewport</a> <a class="sublink-1" tags="browser" href="#getscrollposition">getScrollPosition</a> <a class="sublink-1" tags="browser" href="#getstyle">getStyle</a> <a class="sublink-1" tags="browser" href="#hasclass">hasClass</a> <a class="sublink-1" tags="browser" href="#hide">hide</a> <a class="sublink-1" tags="browser" href="#httpsredirect">httpsRedirect</a> <a class="sublink-1" tags="browser" href="#onuserinputchange">onUserInputChange</a> <a class="sublink-1" tags="browser" href="#redirect">redirect</a> <a class="sublink-1" tags="browser" href="#runasync">runAsync</a> <a class="sublink-1" tags="browser" href="#scrolltotop">scrollToTop</a> <a class="sublink-1" tags="browser" href="#setstyle">setStyle</a> <a class="sublink-1" tags="browser" href="#show">show</a> <a class="sublink-1" tags="browser" href="#speechsynthesis">speechSynthesis</a> <a class="sublink-1" tags="browser" href="#toggleclass">toggleClass</a> <a class="sublink-1" tags="browser" href="#uuidgeneratorbrowser">UUIDGeneratorBrowser</a><h3>Date</h3><a class="sublink-1" tags="date" href="#formatduration">formatDuration</a> <a class="sublink-1" tags="date" href="#getdaysdiffbetweendates">getDaysDiffBetweenDates</a> <a class="sublink-1" tags="date" href="#jsontodate">JSONToDate</a> <a class="sublink-1" tags="date" href="#toenglishdate">toEnglishDate</a> <a class="sublink-1" tags="date" href="#tomorrow">tomorrow</a><h3>Function</h3><a class="sublink-1" tags="function" href="#chainasync">chainAsync</a> <a class="sublink-1" tags="function" href="#compose">compose</a> <a class="sublink-1" tags="function" href="#curry">curry</a> <a class="sublink-1" tags="function" href="#defer">defer</a> <a class="sublink-1" tags="function" href="#functionname">functionName</a> <a class="sublink-1" tags="function" href="#memoize">memoize</a> <a class="sublink-1" tags="function" href="#once">once</a> <a class="sublink-1" tags="function" href="#runpromisesinseries">runPromisesInSeries</a> <a class="sublink-1" tags="function" href="#sleep">sleep</a><h3>Logic</h3><a class="sublink-1" tags="logic" href="#negate">negate</a><h3>Math</h3><a class="sublink-1" tags="math" href="#average">average</a> <a class="sublink-1" tags="math" href="#clampnumber">clampNumber</a> <a class="sublink-1" tags="math" href="#collatz">collatz</a> <a class="sublink-1" tags="math" href="#digitize">digitize</a> <a class="sublink-1" tags="math" href="#distance">distance</a> <a class="sublink-1" tags="math" href="#elo">elo</a> <a class="sublink-1" tags="math" href="#factorial">factorial</a> <a class="sublink-1" tags="math" href="#factors">factors</a> <a class="sublink-1" tags="math" href="#fibonacci">fibonacci</a> <a class="sublink-1" tags="math" href="#fibonaccicountuntilnum">fibonacciCountUntilNum</a> <a class="sublink-1" tags="math" href="#fibonacciuntilnum">fibonacciUntilNum</a> <a class="sublink-1" tags="math" href="#gcd">gcd</a> <a class="sublink-1" tags="math" href="#geometricprogression">geometricProgression</a> <a class="sublink-1" tags="math" href="#hammingdistance">hammingDistance</a> <a class="sublink-1" tags="math" href="#howmanytimes">howManyTimes</a> <a class="sublink-1" tags="math" href="#inrange">inRange</a> <a class="sublink-1" tags="math" href="#isarmstrongnumber">isArmstrongNumber</a> <a class="sublink-1" tags="math" href="#isdivisible">isDivisible</a> <a class="sublink-1" tags="math" href="#iseven">isEven</a> <a class="sublink-1" tags="math" href="#isprime">isPrime</a> <a class="sublink-1" tags="math" href="#lcm">lcm</a> <a class="sublink-1" tags="math" href="#luhncheck">luhnCheck</a> <a class="sublink-1" tags="math" href="#median">median</a> <a class="sublink-1" tags="math" href="#percentile">percentile</a> <a class="sublink-1" tags="math" href="#powerset">powerset</a> <a class="sublink-1" tags="math" href="#primes">primes</a> <a class="sublink-1" tags="math" href="#randomintegerinrange">randomIntegerInRange</a> <a class="sublink-1" tags="math" href="#randomnumberinrange">randomNumberInRange</a> <a class="sublink-1" tags="math" href="#round">round</a> <a class="sublink-1" tags="math" href="#solverpn">solveRPN</a> <a class="sublink-1" tags="math" href="#standarddeviation">standardDeviation</a> <a class="sublink-1" tags="math" href="#sum">sum</a> <a class="sublink-1" tags="math" href="#sumpower">sumPower</a><h3>Node</h3><a class="sublink-1" tags="node" href="#hasflags">hasFlags</a> <a class="sublink-1" tags="node" href="#istravisci">isTravisCI</a> <a class="sublink-1" tags="node" href="#jsontofile">JSONToFile</a> <a class="sublink-1" tags="node" href="#readfilelines">readFileLines</a> <a class="sublink-1" tags="node" href="#untildify">untildify</a> <a class="sublink-1" tags="node" href="#uuidgeneratornode">UUIDGeneratorNode</a><h3>Object</h3><a class="sublink-1" tags="object" href="#cleanobj">cleanObj</a> <a class="sublink-1" tags="object" href="#invertkeyvalues">invertKeyValues</a> <a class="sublink-1" tags="object" href="#lowercasekeys">lowercaseKeys</a> <a class="sublink-1" tags="object" href="#objectfrompairs">objectFromPairs</a> <a class="sublink-1" tags="object" href="#objecttopairs">objectToPairs</a> <a class="sublink-1" tags="object" href="#orderby">orderBy</a> <a class="sublink-1" tags="object" href="#select">select</a> <a class="sublink-1" tags="object" href="#shallowclone">shallowClone</a> <a class="sublink-1" tags="object" href="#size">size</a> <a class="sublink-1" tags="object" href="#truthcheckcollection">truthCheckCollection</a><h3>String</h3><a class="sublink-1" tags="string" href="#anagrams">anagrams</a> <a class="sublink-1" tags="string" href="#bytesize">byteSize</a> <a class="sublink-1" tags="string" href="#capitalize">capitalize</a> <a class="sublink-1" tags="string" href="#capitalizeeveryword">capitalizeEveryWord</a> <a class="sublink-1" tags="string" href="#countvowels">countVowels</a> <a class="sublink-1" tags="string" href="#escapehtml">escapeHTML</a> <a class="sublink-1" tags="string" href="#escaperegexp">escapeRegExp</a> <a class="sublink-1" tags="string" href="#fromcamelcase">fromCamelCase</a> <a class="sublink-1" tags="string" href="#isabsoluteurl">isAbsoluteURL</a> <a class="sublink-1" tags="string" href="#mask">mask</a> <a class="sublink-1" tags="string" href="#palindrome">palindrome</a> <a class="sublink-1" tags="string" href="#pluralize">pluralize</a> <a class="sublink-1" tags="string" href="#repeatstring">repeatString</a> <a class="sublink-1" tags="string" href="#reversestring">reverseString</a> <a class="sublink-1" tags="string" href="#sortcharactersinstring">sortCharactersInString</a> <a class="sublink-1" tags="string" href="#splitlines">splitLines</a> <a class="sublink-1" tags="string" href="#tocamelcase">toCamelCase</a> <a class="sublink-1" tags="string" href="#tokebabcase">toKebabCase</a> <a class="sublink-1" tags="string" href="#tosnakecase">toSnakeCase</a> <a class="sublink-1" tags="string" href="#truncatestring">truncateString</a> <a class="sublink-1" tags="string" href="#unescapehtml">unescapeHTML</a> <a class="sublink-1" tags="string" href="#words">words</a><h3>Utility</h3><a class="sublink-1" tags="utility" href="#cloneregexp">cloneRegExp</a> <a class="sublink-1" tags="utility" href="#coalesce">coalesce</a> <a class="sublink-1" tags="utility" href="#coalescefactory">coalesceFactory</a> <a class="sublink-1" tags="utility" href="#extendhex">extendHex</a> <a class="sublink-1" tags="utility" href="#gettype">getType</a> <a class="sublink-1" tags="utility" href="#geturlparameters">getURLParameters</a> <a class="sublink-1" tags="utility" href="#hextorgb">hexToRGB</a> <a class="sublink-1" tags="utility" href="#isarray">isArray</a> <a class="sublink-1" tags="utility" href="#isarraylike">isArrayLike</a> <a class="sublink-1" tags="utility" href="#isboolean">isBoolean</a> <a class="sublink-1" tags="utility" href="#isfunction">isFunction</a> <a class="sublink-1" tags="utility" href="#isnull">isNull</a> <a class="sublink-1" tags="utility" href="#isnumber">isNumber</a> <a class="sublink-1" tags="utility" href="#isprimitive">isPrimitive</a> <a class="sublink-1" tags="utility" href="#ispromiselike">isPromiseLike</a> <a class="sublink-1" tags="utility" href="#isstring">isString</a> <a class="sublink-1" tags="utility" href="#issymbol">isSymbol</a> <a class="sublink-1" tags="utility" href="#isvalidjson">isValidJSON</a> <a class="sublink-1" tags="utility" href="#prettybytes">prettyBytes</a> <a class="sublink-1" tags="utility" href="#randomhexcolorcode">randomHexColorCode</a> <a class="sublink-1" tags="utility" href="#rgbtohex">RGBToHex</a> <a class="sublink-1" tags="utility" href="#sdbm">sdbm</a> <a class="sublink-1" tags="utility" href="#timetaken">timeTaken</a> <a class="sublink-1" tags="utility" href="#todecimalmark">toDecimalMark</a> <a class="sublink-1" tags="utility" href="#toordinalsuffix">toOrdinalSuffix</a> <a class="sublink-1" tags="utility" href="#validatenumber">validateNumber</a> <a class="sublink-1" tags="utility" href="#yesno">yesNo</a></nav><main class="col-sm-12 col-md-8 col-lg-9" style="height:100%;overflow-y:auto;background:#eceef2;padding:0"><a id="top">&nbsp;</a><h2 style="text-align:center">Adapter</h2><div class="card fluid"><h3 id="call" class="section double-padded">call</h3><div class="section double-padded"><p>Given a key and a set of arguments, call them when given a context. Primarily useful in composition.</p><p>Use a closure to call a stored key with stored arguments.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">call</span> <span class="token operator">=</span> <span class="token punctuation">(</span>key<span class="token punctuation">,</span> <span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> context <span class="token operator">=></span> context<span class="token punctuation">[</span>key<span class="token punctuation">](</span><span class="token operator">...</span>args<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js">Promise<span class="token punctuation">.</span><span class="token function">resolve</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">])
   .</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token function">call</span><span class="token punctuation">(</span><span class="token string">'map'</span><span class="token punctuation">,</span> x <span class="token operator">=></span> <span class="token number">2</span> <span class="token operator">*</span> x<span class="token punctuation">))
   .</span><span class="token function">then</span><span class="token punctuation">(</span>console<span class="token punctuation">.</span>log<span class="token punctuation">);</span> <span class="token comment">//[ 2, 4, 6 ]</span>
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.drawer-close:focus{background:var(--dr-hv-b-col)}@media screen and (max-width: 320px){[type="checkbox"].drawer+*{width:100%}}[type="checkbox"].drawer:checked+*{left:0}@media screen and (min-width: 768px){[type="checkbox"].drawer:not(.persistent)+*{position:static;height:100%;z-index:1100}[type="checkbox"].drawer:not(.persistent)+* .drawer-close{display:none}}:root{--mrk-b-col:#424242;--mrk-f-col:#fafafa}mark{background:var(--mrk-b-col);color:var(--mrk-f-col);font-size:.5em;line-height:1em;border-radius:var(--u-br-r);padding:calc(var(--u-p) / 4) calc(var(--u-p) / 2)}mark.inline-block{display:inline-block;font-size:1em;line-height:1.5;padding:calc(var(--u-p) / 2) var(--u-p)}:root{--tst-b-col:#212121;--tst-f-col:#fafafa}.toast{position:fixed;bottom:calc(var(--u-m) * 3);left:50%;transform:translate(-50%, -50%);z-index:1111;color:var(--tst-f-col);background:var(--tst-b-col);border-radius:calc(var(--u-br-r) * 16);padding:var(--u-p) calc(var(--u-p) * 3)}.toast{bottom:calc(var(--u-m) / 2);opacity:1;transition:opacity 0.3s ease-in-out}mark{position:relative;top:-0.25rem;left:0.25rem}mark.secondary{--mrk-b-col:#d32f2f}mark.tertiary{--mrk-b-col:#308732}mark.tag{padding:calc(var(--u-p)/2) var(--u-p);border-radius:1em}code,pre,kbd,code *,pre *,kbd *,code[class*="language-"],pre[class*="language-"]{font-family:Menlo, Consolas, monospace !important}pre{border:0.0625rem solid var(--br-col2);border-radius:var(--u-br-r)}.group{position:relative;margin-top:2em;margin-bottom:1em}.search{font-size:0.875rem;margin-top:-0.1em;display:block;width:100%;border:none;border-bottom:.0625rem solid var(--nv-ln-col)}.search:focus{outline:none}label#search-label{color:var(--nv-ln-col);font-size:1.125rem;font-weight:400;position:absolute;left:0.3125rem;top:0.625rem}.search:focus ~ label#search-label,.search:valid ~ label#search-label{top:-1.25rem;font-size:0.875rem;color:var(--nv-ln-col)}label#menu-toggle{width:3.4375rem}header h1.logo{margin-top:-0.8rem;text-align:center}header h1.logo 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var(--u-p));border-radius:var(--u-br-r)}label.collapse:hover,label.collapse:focus{background:var(--clps-lbl-h-b-col)}label.collapse+pre{box-sizing:border-box;height:0;max-height:1px;overflow:auto;margin:0;border:0;padding:0;transition:max-height 0.3s}label.collapse.toggled{background:var(--clps-sel-lbl-b-col);border-bottom-color:var(--clps-sel-lbl-br-col);border-bottom-left-radius:0;border-bottom-right-radius:0}label.collapse.toggled+pre{border-top-left-radius:0;border-top-right-radius:0;position:relative;width:100%;height:auto;border:.0625rem solid var(--clps-br-col);border-top:0;padding:calc(2 * var(--u-p));max-height:400px}button.primary.clipboard-copy{width:100%;margin-left:0}button.primary.clipboard-copy>img{vertical-align:bottom}code[class*="language-"],pre[class*="language-"]{color:#222;text-align:left;white-space:pre;word-spacing:normal;word-break:normal;word-wrap:normal;line-height:1.8;-moz-tab-size:2;-o-tab-size:2;tab-size:2;-webkit-hypens:none;-moz-hyphens:none;-ms-hyphens:none;hyphens:none}pre[class*="language-"]{padding:calc(2 * var(--u-p));overflow:auto;margin:var(--u-m) 0}pre[class*="language-"]::-moz-selection,pre[class*="language-"] ::-moz-selection,code[class*="language-"]::-moz-selection,code[class*="language-"] ::-moz-selection{background:#b3d4fc}pre[class*="language-"]::selection,pre[class*="language-"] ::selection,code[class*="language-"]::selection,code[class*="language-"] 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From 0425ebefe70aa08c90339d3b05da764ebf0d3a66 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 5 Jan 2018 16:33:54 +0200
Subject: [PATCH 09/14] Archive, multitagging, cleanup

Cleaned up the current snippets for consistency and minor problems, added multiple tags to most of them, archived a few.
---
 README.md                                     | 4948 ++++++++---------
 snippets/RGBToHex.md                          |    2 +-
 snippets/average.md                           |    9 +-
 snippets/byteSize.md                          |    2 +-
 snippets/capitalize.md                        |    2 +-
 snippets/capitalizeEveryWord.md               |    2 +-
 snippets/cleanObj.md                          |    4 +-
 snippets/countOccurrences.md                  |    2 +-
 snippets/elo.md                               |    8 +-
 snippets/escapeHTML.md                        |    2 +-
 snippets/escapeRegExp.md                      |    2 +-
 snippets/extendHex.md                         |    5 +-
 snippets/flatten.md                           |    2 +-
 snippets/flip.md                              |    2 +-
 snippets/fromCamelCase.md                     |    4 +-
 snippets/gcd.md                               |    3 +-
 snippets/getType.md                           |    2 +-
 snippets/getURLParameters.md                  |    2 +-
 snippets/initializeArrayWithValues.md         |    4 +-
 snippets/isArray.md                           |    3 +-
 snippets/isFunction.md                        |    1 -
 snippets/lcm.md                               |    6 +-
 snippets/mask.md                              |    2 +-
 snippets/negate.md                            |    2 +-
 snippets/orderBy.md                           |    4 +-
 snippets/palindrome.md                        |    4 +-
 snippets/repeatString.md                      |   16 -
 snippets/reverseString.md                     |    7 +-
 snippets/sdbm.md                              |    4 +-
 snippets/select.md                            |    2 +-
 snippets/setStyle.md                          |    4 +-
 snippets/shuffle.md                           |    2 +-
 snippets/similarity.md                        |    2 +-
 snippets/size.md                              |   20 +-
 snippets/sortCharactersInString.md            |    5 +-
 snippets/sum.md                               |    4 +-
 snippets/tail.md                              |    2 +-
 snippets/toCamelCase.md                       |    3 +-
 snippets/toKebabCase.md                       |    3 +-
 snippets/toSnakeCase.md                       |    3 +-
 snippets/tomorrow.md                          |    2 +-
 snippets/truncateString.md                    |    2 +-
 snippets/validateNumber.md                    |    2 +-
 snippets/words.md                             |    4 +-
 {snippets => snippets_archive}/JSONToDate.md  |    0
 {snippets => snippets_archive}/collatz.md     |    0
 {snippets => snippets_archive}/factors.md     |    0
 .../fibonacciCountUntilNum.md                 |    0
 .../fibonacciUntilNum.md                      |    0
 .../howManyTimes.md                           |    0
 .../isArmstrongNumber.md                      |    0
 {snippets => snippets_archive}/quickSort.md   |    0
 {snippets => snippets_archive}/solveRPN.md    |    0
 .../speechSynthesis.md                        |    0
 tag_database                                  |  216 +-
 55 files changed, 2650 insertions(+), 2682 deletions(-)
 delete mode 100644 snippets/repeatString.md
 rename {snippets => snippets_archive}/JSONToDate.md (100%)
 rename {snippets => snippets_archive}/collatz.md (100%)
 rename {snippets => snippets_archive}/factors.md (100%)
 rename {snippets => snippets_archive}/fibonacciCountUntilNum.md (100%)
 rename {snippets => snippets_archive}/fibonacciUntilNum.md (100%)
 rename {snippets => snippets_archive}/howManyTimes.md (100%)
 rename {snippets => snippets_archive}/isArmstrongNumber.md (100%)
 rename {snippets => snippets_archive}/quickSort.md (100%)
 rename {snippets => snippets_archive}/solveRPN.md (100%)
 rename {snippets => snippets_archive}/speechSynthesis.md (100%)

diff --git a/README.md b/README.md
index 61b5b1d17..9330f22fa 100644
--- a/README.md
+++ b/README.md
@@ -1,72 +1,72 @@
-![Logo](/logo.png)
-
-# 30 seconds of code
-
-[![License](https://img.shields.io/badge/license-CC0--1.0-blue.svg)](https://github.com/Chalarangelo/30-seconds-of-code/blob/master/LICENSE) [![npm Downloads](https://img.shields.io/npm/dt/30-seconds-of-code.svg)](https://www.npmjs.com/package/30-seconds-of-code) [![npm Version](https://img.shields.io/npm/v/30-seconds-of-code.svg)](https://www.npmjs.com/package/30-seconds-of-code) [![Gitter chat](https://img.shields.io/badge/chat-on%20gitter-4FB999.svg)](https://gitter.im/30-seconds-of-code/Lobby) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](http://makeapullrequest.com) [![Travis Build](https://travis-ci.org/Chalarangelo/30-seconds-of-code.svg?branch=master)](https://travis-ci.org/Chalarangelo/30-seconds-of-code) [![Insight.io](https://img.shields.io/badge/insight.io-Ready-brightgreen.svg)](https://insight.io/github.com/Chalarangelo/30-seconds-of-code/tree/master/?source=0) [![js-semistandard-style](https://img.shields.io/badge/code%20style-semistandard-brightgreen.svg)](https://github.com/Flet/semistandard) [![ProductHunt](https://img.shields.io/badge/producthunt-vote-orange.svg)](https://www.producthunt.com/posts/30-seconds-of-code)
-
-
-> Curated collection of useful JavaScript snippets that you can understand in 30 seconds or less.
-
-
-- Use <kbd>Ctrl</kbd> + <kbd>F</kbd> or <kbd>command</kbd> + <kbd>F</kbd> to search for a snippet.
-- Contributions welcome, please read the [contribution guide](CONTRIBUTING.md).
-- Snippets are written in ES6, use the [Babel transpiler](https://babeljs.io/) to ensure backwards-compatibility.
-- You can import these snippets into your text editor of choice (VSCode, Atom, Sublime) using the files found in [this repo](https://github.com/Rob-Rychs/30-seconds-of-code-texteditorsnippets).
-- You can import these snippets into Alfred 3, using [this file](https://github.com/lslvxy/30-seconds-of-code-alfredsnippets).
-
-#### Package
-
-⚠️ **WARNING:** Snippets are not production ready.
-
-You can find a package with all the snippets on [npm](https://www.npmjs.com/package/30-seconds-of-code). 
-
-```
-npm install 30-seconds-of-code
-```
-
-CDN links
-- [ES2017 Full (UMD)](https://unpkg.com/30-seconds-of-code)
-- [ES5 Minified (UMD)](https://unpkg.com/30-seconds-of-code/dist/_30s.es5.min.js)
-
-<details>
-
-**Browser**
-
-> IMPORTANT: replace the `src` with the full version link and desired target spec (such as ES5 minified)):
-
-```html
-<script src="https://unpkg.com/30-seconds-of-code"></script>
-<script>
-  _30s.average(1, 2, 3);
-</script>
-```
-
-**Node**
-
-```js
-// CommonJS
-const _30s = require('30-seconds-of-code');
-_30s.average(1, 2, 3);
-
-// ES Modules
-import _30s from '30-seconds-of-code';
-_30s.average(1, 2, 3);
-```
-
-To import snippets directly:
-
-```js
-// CommonJS
-const { average } = require('30-seconds-of-code');
-average(1, 2, 3);
-
-// ES Modules
-import { average } from '30-seconds-of-code';
-average(1, 2, 3);
-```
-</details>
-
-## Table of Contents
+![Logo](/logo.png)
+
+# 30 seconds of code
+
+[![License](https://img.shields.io/badge/license-CC0--1.0-blue.svg)](https://github.com/Chalarangelo/30-seconds-of-code/blob/master/LICENSE) [![npm Downloads](https://img.shields.io/npm/dt/30-seconds-of-code.svg)](https://www.npmjs.com/package/30-seconds-of-code) [![npm Version](https://img.shields.io/npm/v/30-seconds-of-code.svg)](https://www.npmjs.com/package/30-seconds-of-code) [![Gitter chat](https://img.shields.io/badge/chat-on%20gitter-4FB999.svg)](https://gitter.im/30-seconds-of-code/Lobby) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](http://makeapullrequest.com) [![Travis Build](https://travis-ci.org/Chalarangelo/30-seconds-of-code.svg?branch=master)](https://travis-ci.org/Chalarangelo/30-seconds-of-code) [![Insight.io](https://img.shields.io/badge/insight.io-Ready-brightgreen.svg)](https://insight.io/github.com/Chalarangelo/30-seconds-of-code/tree/master/?source=0) [![js-semistandard-style](https://img.shields.io/badge/code%20style-semistandard-brightgreen.svg)](https://github.com/Flet/semistandard) [![ProductHunt](https://img.shields.io/badge/producthunt-vote-orange.svg)](https://www.producthunt.com/posts/30-seconds-of-code)
+
+
+> Curated collection of useful JavaScript snippets that you can understand in 30 seconds or less.
+
+
+- Use <kbd>Ctrl</kbd> + <kbd>F</kbd> or <kbd>command</kbd> + <kbd>F</kbd> to search for a snippet.
+- Contributions welcome, please read the [contribution guide](CONTRIBUTING.md).
+- Snippets are written in ES6, use the [Babel transpiler](https://babeljs.io/) to ensure backwards-compatibility.
+- You can import these snippets into your text editor of choice (VSCode, Atom, Sublime) using the files found in [this repo](https://github.com/Rob-Rychs/30-seconds-of-code-texteditorsnippets).
+- You can import these snippets into Alfred 3, using [this file](https://github.com/lslvxy/30-seconds-of-code-alfredsnippets).
+
+#### Package
+
+⚠️ **WARNING:** Snippets are not production ready.
+
+You can find a package with all the snippets on [npm](https://www.npmjs.com/package/30-seconds-of-code).
+
+```
+npm install 30-seconds-of-code
+```
+
+CDN links
+- [ES2017 Full (UMD)](https://unpkg.com/30-seconds-of-code)
+- [ES5 Minified (UMD)](https://unpkg.com/30-seconds-of-code/dist/_30s.es5.min.js)
+
+<details>
+
+**Browser**
+
+> IMPORTANT: replace the `src` with the full version link and desired target spec (such as ES5 minified)):
+
+```html
+<script src="https://unpkg.com/30-seconds-of-code"></script>
+<script>
+  _30s.average(1, 2, 3);
+</script>
+```
+
+**Node**
+
+```js
+// CommonJS
+const _30s = require('30-seconds-of-code');
+_30s.average(1, 2, 3);
+
+// ES Modules
+import _30s from '30-seconds-of-code';
+_30s.average(1, 2, 3);
+```
+
+To import snippets directly:
+
+```js
+// CommonJS
+const { average } = require('30-seconds-of-code');
+average(1, 2, 3);
+
+// ES Modules
+import { average } from '30-seconds-of-code';
+average(1, 2, 3);
+```
+</details>
+
+## Table of Contents
 
 ### 🔌 Adapter
 
@@ -427,17 +427,17 @@ Object.assign(b, a); // == b
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### pipeFunctions
-
-Performs left-to-right function composition.
-
-Use `Array.reduce()` with the spread operator (`...`) to perform left-to-right function composition.
-The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.
-
+### pipeFunctions
+
+Performs left-to-right function composition.
+
+Use `Array.reduce()` with the spread operator (`...`) to perform left-to-right function composition.
+The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.
+
 ```js
 const pipeFunctions = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args)));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -446,36 +446,36 @@ const add5 = x => x + 5;
 const multiply = (x, y) => x * y;
 const multiplyAndAdd5 = pipeFunctions(multiply, add5);
 multiplyAndAdd5(5, 2); // 15
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### promisify
-
-Converts an asynchronous function to return a promise.
-
-Use currying to return a function returning a `Promise` that calls the original function.
-Use the `...rest` operator to pass in all the parameters.
-
-*In Node 8+, you can use [`util.promisify`](https://nodejs.org/api/util.html#util_util_promisify_original)*
-
+### promisify
+
+Converts an asynchronous function to return a promise.
+
+Use currying to return a function returning a `Promise` that calls the original function.
+Use the `...rest` operator to pass in all the parameters.
+
+*In Node 8+, you can use [`util.promisify`](https://nodejs.org/api/util.html#util_util_promisify_original)*
+
 ```js
 const promisify = func => (...args) =>
   new Promise((resolve, reject) =>
     func(...args, (err, result) => (err ? reject(err) : resolve(result)))
   );
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const delay = promisify((d, cb) => setTimeout(cb, d));
 delay(2000).then(() => console.log('Hi!')); // // Promise resolves after 2s
-```
+```
 
 </details>
 
@@ -507,206 +507,206 @@ arrayMax([1, 2, 3]); // 3
 ---
  ## 📚 Array
 
-### chunk
-
-Chunks an array into smaller arrays of a specified size.
-
-Use `Array.from()` to create a new array, that fits the number of chunks that will be produced.
-Use `Array.slice()` to map each element of the new array to a chunk the length of `size`.
-If the original array can't be split evenly, the final chunk will contain the remaining elements.
-
+### chunk
+
+Chunks an array into smaller arrays of a specified size.
+
+Use `Array.from()` to create a new array, that fits the number of chunks that will be produced.
+Use `Array.slice()` to map each element of the new array to a chunk the length of `size`.
+If the original array can't be split evenly, the final chunk will contain the remaining elements.
+
 ```js
 const chunk = (arr, size) =>
   Array.from({ length: Math.ceil(arr.length / size) }, (v, i) =>
     arr.slice(i * size, i * size + size)
   );
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 chunk([1, 2, 3, 4, 5], 2); // [[1,2],[3,4],[5]]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### compact
-
-Removes falsey values from an array.
-
-Use `Array.filter()` to filter out falsey values (`false`, `null`, `0`, `""`, `undefined`, and `NaN`).
-
+### compact
+
+Removes falsey values from an array.
+
+Use `Array.filter()` to filter out falsey values (`false`, `null`, `0`, `""`, `undefined`, and `NaN`).
+
 ```js
 const compact = arr => arr.filter(Boolean);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 compact([0, 1, false, 2, '', 3, 'a', 'e' * 23, NaN, 's', 34]); // [ 1, 2, 3, 'a', 's', 34 ]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### countOccurrences
-
-Counts the occurrences of a value in an array.
-
-Use `Array.reduce()` to increment a counter each time you encounter the specific value inside the array.
-
+### countOccurrences
+
+Counts the occurrences of a value in an array.
+
+Use `Array.reduce()` to increment a counter each time you encounter the specific value inside the array.
+
 ```js
 const countOccurrences = (arr, value) => arr.reduce((a, v) => (v === value ? a + 1 : a + 0), 0);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 countOccurrences([1, 1, 2, 1, 2, 3], 1); // 3
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### deepFlatten
-
-Deep flattens an array.
-
-Use recursion.
-Use `Array.concat()` with an empty array (`[]`) and the spread operator (`...`) to flatten an array.
-Recursively flatten each element that is an array.
-
+### deepFlatten
+
+Deep flattens an array.
+
+Use recursion.
+Use `Array.concat()` with an empty array (`[]`) and the spread operator (`...`) to flatten an array.
+Recursively flatten each element that is an array.
+
 ```js
 const deepFlatten = arr => [].concat(...arr.map(v => (Array.isArray(v) ? deepFlatten(v) : v)));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 deepFlatten([1, [2], [[3], 4], 5]); // [1,2,3,4,5]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### difference
-
-Returns the difference between two arrays.
-
-Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values not contained in `b`.
-
+### difference
+
+Returns the difference between two arrays.
+
+Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values not contained in `b`.
+
 ```js
 const difference = (a, b) => {
   const s = new Set(b);
   return a.filter(x => !s.has(x));
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 difference([1, 2, 3], [1, 2, 4]); // [3]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### differenceWith
-
-Filters out all values from an array for which the comparator function does not return `true`.
-
-Use `Array.filter()` and `Array.findIndex()` to find the appropriate values.
-
-```js
-const differenceWith = (arr, val, comp) => arr.filter(a => val.findIndex(b => comp(a, b)) === -1);
-```
-
+### differenceWith
+
+Filters out all values from an array for which the comparator function does not return `true`.
+
+Use `Array.filter()` and `Array.findIndex()` to find the appropriate values.
+
+```js
+const differenceWith = (arr, val, comp) => arr.filter(a => val.findIndex(b => comp(a, b)) === -1);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-differenceWith([1, 1.2, 1.5, 3, 0], [1.9, 3, 0], (a, b) => Math.round(a) === Math.round(b)); // [1, 1.2]
-```
+```js
+differenceWith([1, 1.2, 1.5, 3, 0], [1.9, 3, 0], (a, b) => Math.round(a) === Math.round(b)); // [1, 1.2]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### distinctValuesOfArray
-
-Returns all the distinct values of an array.
-
-Use ES6 `Set` and the `...rest` operator to discard all duplicated values.
-
+### distinctValuesOfArray
+
+Returns all the distinct values of an array.
+
+Use ES6 `Set` and the `...rest` operator to discard all duplicated values.
+
 ```js
 const distinctValuesOfArray = arr => [...new Set(arr)];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 distinctValuesOfArray([1, 2, 2, 3, 4, 4, 5]); // [1,2,3,4,5]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### dropElements
-
-Removes elements in an array until the passed function returns `true`. Returns the remaining elements in the array.
-
-Loop through the array, using `Array.slice()` to drop the first element of the array until the returned value from the function is `true`.
-Returns the remaining elements.
-
+### dropElements
+
+Removes elements in an array until the passed function returns `true`. Returns the remaining elements in the array.
+
+Loop through the array, using `Array.slice()` to drop the first element of the array until the returned value from the function is `true`.
+Returns the remaining elements.
+
 ```js
 const dropElements = (arr, func) => {
   while (arr.length > 0 && !func(arr[0])) arr = arr.slice(1);
   return arr;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 dropElements([1, 2, 3, 4], n => n >= 3); // [3,4]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### dropRight
-
-Returns a new array with `n` elements removed from the right.
-
-Use `Array.slice()` to slice the remove the specified number of elements from the right.
-
+### dropRight
+
+Returns a new array with `n` elements removed from the right.
+
+Use `Array.slice()` to slice the remove the specified number of elements from the right.
+
 ```js
 const dropRight = (arr, n = 1) => arr.slice(0, -n);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -714,497 +714,497 @@ const dropRight = (arr, n = 1) => arr.slice(0, -n);
 dropRight([1, 2, 3]); // [1,2]
 dropRight([1, 2, 3], 2); // [1]
 dropRight([1, 2, 3], 42); // []
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### everyNth
-
-Returns every nth element in an array.
-
-Use `Array.filter()` to create a new array that contains every nth element of a given array.
-
+### everyNth
+
+Returns every nth element in an array.
+
+Use `Array.filter()` to create a new array that contains every nth element of a given array.
+
 ```js
 const everyNth = (arr, nth) => arr.filter((e, i) => i % nth === nth - 1);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 everyNth([1, 2, 3, 4, 5, 6], 2); // [ 2, 4, 6 ]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### filterNonUnique
-
-Filters out the non-unique values in an array.
-
-Use `Array.filter()` for an array containing only the unique values.
-
+### filterNonUnique
+
+Filters out the non-unique values in an array.
+
+Use `Array.filter()` for an array containing only the unique values.
+
 ```js
 const filterNonUnique = arr => arr.filter(i => arr.indexOf(i) === arr.lastIndexOf(i));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 filterNonUnique([1, 2, 2, 3, 4, 4, 5]); // [1,3,5]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### flatten
-
-Flattens an array.
-
-Use a new array and concatenate it with the spread input array causing a shallow denesting of any contained arrays.
-
+### flatten
+
+Flattens an array.
+
+Use a new array and concatenate it with the spread input array causing a shallow denesting of any contained arrays.
+
 ```js
 const flatten = arr => [].concat(...arr);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 flatten([1, [2], 3, 4]); // [1,2,3,4]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### flattenDepth
-
-Flattens an array up to the specified depth.
-
-Use recursion, decrementing `depth` by 1 for each level of depth.
-Use `Array.reduce()` and `Array.concat()` to merge elements or arrays.
-Base case, for `depth` equal to `1` stops recursion.
-Omit the second element, `depth` to flatten only to a depth of `1` (single flatten).
-
+### flattenDepth
+
+Flattens an array up to the specified depth.
+
+Use recursion, decrementing `depth` by 1 for each level of depth.
+Use `Array.reduce()` and `Array.concat()` to merge elements or arrays.
+Base case, for `depth` equal to `1` stops recursion.
+Omit the second element, `depth` to flatten only to a depth of `1` (single flatten).
+
 ```js
 const flattenDepth = (arr, depth = 1) =>
   depth != 1
     ? arr.reduce((a, v) => a.concat(Array.isArray(v) ? flattenDepth(v, depth - 1) : v), [])
     : arr.reduce((a, v) => a.concat(v), []);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 flattenDepth([1, [2], 3, 4]); // [1,2,3,4]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### groupBy
-
-Groups the elements of an array based on the given function.
-
-Use `Array.map()` to map the values of an array to a function or property name.
-Use `Array.reduce()` to create an object, where the keys are produced from the mapped results.
-
+### groupBy
+
+Groups the elements of an array based on the given function.
+
+Use `Array.map()` to map the values of an array to a function or property name.
+Use `Array.reduce()` to create an object, where the keys are produced from the mapped results.
+
 ```js
 const groupBy = (arr, func) =>
   arr.map(typeof func === 'function' ? func : val => val[func]).reduce((acc, val, i) => {
     acc[val] = (acc[val] || []).concat(arr[i]);
     return acc;
   }, {});
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 groupBy([6.1, 4.2, 6.3], Math.floor); // {4: [4.2], 6: [6.1, 6.3]}
 groupBy(['one', 'two', 'three'], 'length'); // {3: ['one', 'two'], 5: ['three']}
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### head
-
-Returns the head of a list.
-
-Use `arr[0]` to return the first element of the passed array.
-
+### head
+
+Returns the head of a list.
+
+Use `arr[0]` to return the first element of the passed array.
+
 ```js
 const head = arr => arr[0];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 head([1, 2, 3]); // 1
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### initial
-
-Returns all the elements of an array except the last one.
-
-Use `arr.slice(0,-1)` to return all but the last element of the array.
-
+### initial
+
+Returns all the elements of an array except the last one.
+
+Use `arr.slice(0,-1)` to return all but the last element of the array.
+
 ```js
 const initial = arr => arr.slice(0, -1);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 initial([1, 2, 3]); // [1,2]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### initialize2DArray
-
-Initializes a 2D array of given width and height and value.
-
-Use `Array.map()` to generate h rows where each is a new array of size w initialize with value. If the value is not provided, default to `null`.
-
+### initialize2DArray
+
+Initializes a 2D array of given width and height and value.
+
+Use `Array.map()` to generate h rows where each is a new array of size w initialize with value. If the value is not provided, default to `null`.
+
 ```js
 const initialize2DArray = (w, h, val = null) =>
   Array(h)
     .fill()
     .map(() => Array(w).fill(val));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 initialize2DArray(2, 2, 0); // [[0,0], [0,0]]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### initializeArrayWithRange
-
-Initializes an array containing the numbers in the specified range where `start` and `end` are inclusive with there common difference `step`.
-
-Use `Array.from(Math.ceil((end+1-start)/step))` to create an array of the desired length(the amounts of elements is equal to `(end-start)/step` or `(end+1-start)/step` for inclusive end), `Array.map()` to fill with the desired values in a range.
-You can omit `start` to use a default value of `0`.
-You can omit `step` to use a default value of `1`.
-
-```js
-const initializeArrayWithRange = (end, start = 0, step = 1) =>
-  Array.from({ length: Math.ceil((end + 1 - start) / step) }).map((v, i) => i * step + start);
-```
-
+### initializeArrayWithRange
+
+Initializes an array containing the numbers in the specified range where `start` and `end` are inclusive with there common difference `step`.
+
+Use `Array.from(Math.ceil((end+1-start)/step))` to create an array of the desired length(the amounts of elements is equal to `(end-start)/step` or `(end+1-start)/step` for inclusive end), `Array.map()` to fill with the desired values in a range.
+You can omit `start` to use a default value of `0`.
+You can omit `step` to use a default value of `1`.
+
+```js
+const initializeArrayWithRange = (end, start = 0, step = 1) =>
+  Array.from({ length: Math.ceil((end + 1 - start) / step) }).map((v, i) => i * step + start);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-initializeArrayWithRange(5); // [0,1,2,3,4,5]
-initializeArrayWithRange(7, 3); // [3,4,5,6,7]
-initializeArrayWithRange(9, 0, 2); // [0,2,4,6,8]
-```
+```js
+initializeArrayWithRange(5); // [0,1,2,3,4,5]
+initializeArrayWithRange(7, 3); // [3,4,5,6,7]
+initializeArrayWithRange(9, 0, 2); // [0,2,4,6,8]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### initializeArrayWithValues
-
-Initializes and fills an array with the specified values.
-
-Use `Array(n)` to create an array of the desired length, `fill(v)` to fill it with the desired values.
-You can omit `value` to use a default value of `0`.
-
+### initializeArrayWithValues
+
+Initializes and fills an array with the specified values.
+
+Use `Array(n)` to create an array of the desired length, `fill(v)` to fill it with the desired values.
+You can omit `value` to use a default value of `0`.
+
 ```js
 const initializeArrayWithValues = (n, value = 0) => Array(n).fill(value);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 initializeArrayWithValues(5, 2); // [2,2,2,2,2]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### intersection
-
-Returns a list of elements that exist in both arrays.
-
-Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values contained in `b`.
-
+### intersection
+
+Returns a list of elements that exist in both arrays.
+
+Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values contained in `b`.
+
 ```js
 const intersection = (a, b) => {
   const s = new Set(b);
   return a.filter(x => s.has(x));
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 intersection([1, 2, 3], [4, 3, 2]); // [2,3]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isSorted
-
-Returns `1` if the array is sorted in ascending order, `-1` if it is sorted in descending order or `0` if it is not sorted.
-
-Calculate the ordering `direction` for the first two elements.
-Use `Object.entries()` to loop over array objects and compare them in pairs.
-Return `0` if the `direction` changes or the `direction` if the last element is reached.
-
-```js
-const isSorted = arr => {
-  const direction = arr[0] > arr[1] ? -1 : 1;
-  for (let [i, val] of arr.entries())
-    if (i === arr.length - 1) return direction;
-    else if ((val - arr[i + 1]) * direction > 0) return 0;
-};
-```
-
+### isSorted
+
+Returns `1` if the array is sorted in ascending order, `-1` if it is sorted in descending order or `0` if it is not sorted.
+
+Calculate the ordering `direction` for the first two elements.
+Use `Object.entries()` to loop over array objects and compare them in pairs.
+Return `0` if the `direction` changes or the `direction` if the last element is reached.
+
+```js
+const isSorted = arr => {
+  const direction = arr[0] > arr[1] ? -1 : 1;
+  for (let [i, val] of arr.entries())
+    if (i === arr.length - 1) return direction;
+    else if ((val - arr[i + 1]) * direction > 0) return 0;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isSorted([0, 1, 2, 2]); // 1
-isSorted([4, 3, 2]); // -1
-isSorted([4, 3, 5]); // 0
-```
+```js
+isSorted([0, 1, 2, 2]); // 1
+isSorted([4, 3, 2]); // -1
+isSorted([4, 3, 5]); // 0
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### join
-
-Joins all elements of an array into a string and returns this string. Uses a separator and an end separator.
-
-Use `Array.reduce()` to combine elements into a string.
-Omit the second argument, `separator`, to use a default separator of `','`.
-Omit the third argument, `end`, to use the same value as `separator` by default.
-
-```js
-const join = (arr, separator = ',', end = separator) =>
-  arr.reduce(
-    (acc, val, i) =>
-      i == arr.length - 2
-        ? acc + val + end
-        : i == arr.length - 1 ? acc + val : acc + val + separator,
-    ''
-  );
-```
-
+### join
+
+Joins all elements of an array into a string and returns this string. Uses a separator and an end separator.
+
+Use `Array.reduce()` to combine elements into a string.
+Omit the second argument, `separator`, to use a default separator of `','`.
+Omit the third argument, `end`, to use the same value as `separator` by default.
+
+```js
+const join = (arr, separator = ',', end = separator) =>
+  arr.reduce(
+    (acc, val, i) =>
+      i == arr.length - 2
+        ? acc + val + end
+        : i == arr.length - 1 ? acc + val : acc + val + separator,
+    ''
+  );
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-join(['pen', 'pineapple', 'apple', 'pen'], ',', '&'); // "pen,pineapple,apple&pen"
-join(['pen', 'pineapple', 'apple', 'pen'], ','); // "pen,pineapple,apple,pen"
-join(['pen', 'pineapple', 'apple', 'pen']); // "pen,pineapple,apple,pen"
-```
+```js
+join(['pen', 'pineapple', 'apple', 'pen'], ',', '&'); // "pen,pineapple,apple&pen"
+join(['pen', 'pineapple', 'apple', 'pen'], ','); // "pen,pineapple,apple,pen"
+join(['pen', 'pineapple', 'apple', 'pen']); // "pen,pineapple,apple,pen"
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### last
-
-Returns the last element in an array.
-
-Use `arr.length - 1` to compute the index of the last element of the given array and returning it.
-
+### last
+
+Returns the last element in an array.
+
+Use `arr.length - 1` to compute the index of the last element of the given array and returning it.
+
 ```js
 const last = arr => arr[arr.length - 1];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 last([1, 2, 3]); // 3
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### mapObject
-
-Maps the values of an array to an object using a function, where the key-value pairs consist of the original value as the key and the mapped value.
-
-Use an anonymous inner function scope to declare an undefined memory space, using closures to store a return value. Use a new `Array` to store the array with a map of the function over its data set and a comma operator to return a second step, without needing to move from one context to another (due to closures and order of operations).
-
+### mapObject
+
+Maps the values of an array to an object using a function, where the key-value pairs consist of the original value as the key and the mapped value.
+
+Use an anonymous inner function scope to declare an undefined memory space, using closures to store a return value. Use a new `Array` to store the array with a map of the function over its data set and a comma operator to return a second step, without needing to move from one context to another (due to closures and order of operations).
+
 ```js
 const mapObject = (arr, fn) =>
   (a => (
     (a = [arr, arr.map(fn)]), a[0].reduce((acc, val, ind) => ((acc[val] = a[1][ind]), acc), {})
   ))();
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const squareIt = arr => mapObject(arr, a => a * a);
 squareIt([1, 2, 3]); // { 1: 1, 2: 4, 3: 9 }
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### maxN
-
-Returns the `n` maximum elements from the provided array. If `n` is greater than or equal to the provided array's length, then return the original array(sorted in descending order).
-
-Use `Array.sort()` combined with the spread operator (`...`) to create a shallow clone of the array and sort it in descending order.
-Use `Array.slice()` to get the specified number of elements.
-Omit the second argument, `n`, to get a one-element array.
-
-```js
-const maxN = (arr, n = 1) => [...arr].sort((a, b) => b - a).slice(0, n);
-```
-
+### maxN
+
+Returns the `n` maximum elements from the provided array. If `n` is greater than or equal to the provided array's length, then return the original array(sorted in descending order).
+
+Use `Array.sort()` combined with the spread operator (`...`) to create a shallow clone of the array and sort it in descending order.
+Use `Array.slice()` to get the specified number of elements.
+Omit the second argument, `n`, to get a one-element array.
+
+```js
+const maxN = (arr, n = 1) => [...arr].sort((a, b) => b - a).slice(0, n);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-maxN([1, 2, 3]); // [3]
-maxN([1, 2, 3], 2); // [3,2]
-```
+```js
+maxN([1, 2, 3]); // [3]
+maxN([1, 2, 3], 2); // [3,2]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### minN
-
-Returns the `n` minimum elements from the provided array. If `n` is greater than or equal to the provided array's length, then return the original array(sorted in ascending order).
-
-Use `Array.sort()` combined with the spread operator (`...`) to create a shallow clone of the array and sort it in ascending order.
-Use `Array.slice()` to get the specified number of elements.
-Omit the second argument, `n`, to get a one-element array.
-
-```js
-const minN = (arr, n = 1) => [...arr].sort((a, b) => a - b).slice(0, n);
-```
+### minN
+
+Returns the `n` minimum elements from the provided array. If `n` is greater than or equal to the provided array's length, then return the original array(sorted in ascending order).
+
+Use `Array.sort()` combined with the spread operator (`...`) to create a shallow clone of the array and sort it in ascending order.
+Use `Array.slice()` to get the specified number of elements.
+Omit the second argument, `n`, to get a one-element array.
+
+```js
+const minN = (arr, n = 1) => [...arr].sort((a, b) => a - b).slice(0, n);
+```
 <details>
 <summary>Examples</summary>
 
-```js
-minN([1, 2, 3]); // [1]
-minN([1, 2, 3], 2); // [1,2]
-```
+```js
+minN([1, 2, 3]); // [1]
+minN([1, 2, 3], 2); // [1,2]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### nthElement
-
-Returns the nth element of an array.
-
-Use `Array.slice()` to get an array containing the nth element at the first place.
-If the index is out of bounds, return `[]`.
-Omit the second argument, `n`, to get the first element of the array.
-
+### nthElement
+
+Returns the nth element of an array.
+
+Use `Array.slice()` to get an array containing the nth element at the first place.
+If the index is out of bounds, return `[]`.
+Omit the second argument, `n`, to get the first element of the array.
+
 ```js
 const nthElement = (arr, n = 0) => (n > 0 ? arr.slice(n, n + 1) : arr.slice(n))[0];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 nthElement(['a', 'b', 'c'], 1); // 'b'
 nthElement(['a', 'b', 'b'], -3); // 'a'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### pick
-
-Picks the key-value pairs corresponding to the given keys from an object.
-
-Use `Array.reduce()` to convert the filtered/picked keys back to an object with the corresponding key-value pair if the key exists in the obj.
-
+### pick
+
+Picks the key-value pairs corresponding to the given keys from an object.
+
+Use `Array.reduce()` to convert the filtered/picked keys back to an object with the corresponding key-value pair if the key exists in the obj.
+
 ```js
 const pick = (obj, arr) =>
   arr.reduce((acc, curr) => (curr in obj && (acc[curr] = obj[curr]), acc), {});
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 pick({ a: 1, b: '2', c: 3 }, ['a', 'c']); // { 'a': 1, 'c': 3 }
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### pull
-
-Mutates the original array to filter out the values specified.
-
-Use `Array.filter()` and `Array.includes()` to pull out the values that are not needed.
-Use `Array.length = 0` to mutate the passed in an array by resetting it's length to zero and `Array.push()` to re-populate it with only the pulled values.
-
-_(For a snippet that does not mutate the original array see [`without`](#without))_
-
+### pull
+
+Mutates the original array to filter out the values specified.
+
+Use `Array.filter()` and `Array.includes()` to pull out the values that are not needed.
+Use `Array.length = 0` to mutate the passed in an array by resetting it's length to zero and `Array.push()` to re-populate it with only the pulled values.
+
+_(For a snippet that does not mutate the original array see [`without`](#without))_
+
 ```js
 const pull = (arr, ...args) => {
   let argState = Array.isArray(args[0]) ? args[0] : args;
@@ -1212,29 +1212,29 @@ const pull = (arr, ...args) => {
   arr.length = 0;
   pulled.forEach(v => arr.push(v));
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 let myArray = ['a', 'b', 'c', 'a', 'b', 'c'];
 pull(myArray, 'a', 'c'); // myArray = [ 'b', 'b' ]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### pullAtIndex
-
-Mutates the original array to filter out the values at the specified indexes.
-
-Use `Array.filter()` and `Array.includes()` to pull out the values that are not needed.
-Use `Array.length = 0` to mutate the passed in an array by resetting it's length to zero and `Array.push()` to re-populate it with only the pulled values.
-Use `Array.push()` to keep track of pulled values
-
+### pullAtIndex
+
+Mutates the original array to filter out the values at the specified indexes.
+
+Use `Array.filter()` and `Array.includes()` to pull out the values that are not needed.
+Use `Array.length = 0` to mutate the passed in an array by resetting it's length to zero and `Array.push()` to re-populate it with only the pulled values.
+Use `Array.push()` to keep track of pulled values
+
 ```js
 const pullAtIndex = (arr, pullArr) => {
   let removed = [];
@@ -1245,29 +1245,29 @@ const pullAtIndex = (arr, pullArr) => {
   pulled.forEach(v => arr.push(v));
   return removed;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 let myArray = ['a', 'b', 'c', 'd'];
 let pulled = pullAtIndex(myArray, [1, 3]); // myArray = [ 'a', 'c' ] , pulled = [ 'b', 'd' ]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### pullAtValue
-
-Mutates the original array to filter out the values specified. Returns the removed elements.
-
-Use `Array.filter()` and `Array.includes()` to pull out the values that are not needed.
-Use `Array.length = 0` to mutate the passed in an array by resetting it's length to zero and `Array.push()` to re-populate it with only the pulled values.
-Use `Array.push()` to keep track of pulled values
-
+### pullAtValue
+
+Mutates the original array to filter out the values specified. Returns the removed elements.
+
+Use `Array.filter()` and `Array.includes()` to pull out the values that are not needed.
+Use `Array.length = 0` to mutate the passed in an array by resetting it's length to zero and `Array.push()` to re-populate it with only the pulled values.
+Use `Array.push()` to keep track of pulled values
+
 ```js
 const pullAtValue = (arr, pullArr) => {
   let removed = [],
@@ -1277,29 +1277,29 @@ const pullAtValue = (arr, pullArr) => {
   mutateTo.forEach(v => arr.push(v));
   return removed;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 let myArray = ['a', 'b', 'c', 'd'];
 let pulled = pullAtValue(myArray, ['b', 'd']); // myArray = [ 'a', 'c' ] , pulled = [ 'b', 'd' ]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### quickSort
-
-QuickSort an Array (ascending sort by default).
-
-Use recursion. 
-Use `Array.filter` and spread operator (`...`) to create an array that all elements with values less than the pivot come before the pivot, and all elements with values greater than the pivot come after it. 
-If the parameter `desc` is truthy, return array sorts in descending order.
-
+### quickSort
+
+QuickSort an Array (ascending sort by default).
+
+Use recursion. 
+Use `Array.filter` and spread operator (`...`) to create an array that all elements with values less than the pivot come before the pivot, and all elements with values greater than the pivot come after it. 
+If the parameter `desc` is truthy, return array sorts in descending order.
+
 ```js
 const quickSort = ([n, ...nums], desc) =>
   isNaN(n)
@@ -1309,70 +1309,70 @@ const quickSort = ([n, ...nums], desc) =>
         n,
         ...quickSort(nums.filter(v => (!desc ? v > n : v <= n)), desc)
       ];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 quickSort([4, 1, 3, 2]); // [1,2,3,4]
 quickSort([4, 1, 3, 2], true); // [4,3,2,1]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### reducedFilter
-
-Filter an array of objects based on a condition while also filtering out unspecified keys.
-
-Use `Array.filter()` to filter the array based on the predicate `fn` so that it returns the objects for which the condition returned a truthy value. 
-On the filtered array, use `Array.map()` to return the new object using `Array.reduce()` to filter out the keys which were not supplied as the `keys` argument.
-
-```js
-const reducedFilter = (data, keys, fn) =>
-  data.filter(fn).map(el =>
-    keys.reduce((acc, key) => {
-      acc[key] = el[key];
-      return acc;
-    }, {})
-  );
-```
-
+### reducedFilter
+
+Filter an array of objects based on a condition while also filtering out unspecified keys.
+
+Use `Array.filter()` to filter the array based on the predicate `fn` so that it returns the objects for which the condition returned a truthy value. 
+On the filtered array, use `Array.map()` to return the new object using `Array.reduce()` to filter out the keys which were not supplied as the `keys` argument.
+
+```js
+const reducedFilter = (data, keys, fn) =>
+  data.filter(fn).map(el =>
+    keys.reduce((acc, key) => {
+      acc[key] = el[key];
+      return acc;
+    }, {})
+  );
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-const data = [
-  {
-    id: 1,
-    name: 'john',
-    age: 24
-  },
-  {
-    id: 2,
-    name: 'mike',
-    age: 50
-  }
-];
-
-reducedFilter(data, ['id', 'name'], item => item.age > 24); // [{ id: 2, name: 'mike'}]
-```
+```js
+const data = [
+  {
+    id: 1,
+    name: 'john',
+    age: 24
+  },
+  {
+    id: 2,
+    name: 'mike',
+    age: 50
+  }
+];
+
+reducedFilter(data, ['id', 'name'], item => item.age > 24); // [{ id: 2, name: 'mike'}]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### remove
-
-Removes elements from an array for which the given function returns `false`.
-
-Use `Array.filter()` to find array elements that return truthy values and `Array.reduce()` to remove elements using `Array.splice()`.
-The `func` is invoked with three arguments (`value, index, array`).
-
+### remove
+
+Removes elements from an array for which the given function returns `false`.
+
+Use `Array.filter()` to find array elements that return truthy values and `Array.reduce()` to remove elements using `Array.splice()`.
+The `func` is invoked with three arguments (`value, index, array`).
+
 ```js
 const remove = (arr, func) =>
   Array.isArray(arr)
@@ -1381,304 +1381,304 @@ const remove = (arr, func) =>
         return acc.concat(val);
       }, [])
     : [];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 remove([1, 2, 3, 4], n => n % 2 == 0); // [2, 4]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sample
-
-Returns a random element from an array.
-
-Use `Math.random()` to generate a random number, multiply it by `length` and round it of to the nearest whole number using `Math.floor()`.
-This method also works with strings.
-
+### sample
+
+Returns a random element from an array.
+
+Use `Math.random()` to generate a random number, multiply it by `length` and round it of to the nearest whole number using `Math.floor()`.
+This method also works with strings.
+
 ```js
 const sample = arr => arr[Math.floor(Math.random() * arr.length)];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 sample([3, 7, 9, 11]); // 9
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sampleSize
-
-Gets `n` random elements at unique keys from `array` up to the size of `array`.
-
-Shuffle the array using the [Fisher-Yates algorithm](https://github.com/chalarangelo/30-seconds-of-code#shuffle).
-Use `Array.slice()` to get the first `n` elements.
-Omit the second argument, `n` to get only one element at random from the array.
-
-```js
-const sampleSize = ([...arr], n = 1) => {
-  let m = arr.length;
-  while (m) {
-    const i = Math.floor(Math.random() * m--);
-    [arr[m], arr[i]] = [arr[i], arr[m]];
-  }
-  return arr.slice(0, n);
-};
-```
-
+### sampleSize
+
+Gets `n` random elements at unique keys from `array` up to the size of `array`.
+
+Shuffle the array using the [Fisher-Yates algorithm](https://github.com/chalarangelo/30-seconds-of-code#shuffle).
+Use `Array.slice()` to get the first `n` elements.
+Omit the second argument, `n` to get only one element at random from the array.
+
+```js
+const sampleSize = ([...arr], n = 1) => {
+  let m = arr.length;
+  while (m) {
+    const i = Math.floor(Math.random() * m--);
+    [arr[m], arr[i]] = [arr[i], arr[m]];
+  }
+  return arr.slice(0, n);
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-sampleSize([1, 2, 3], 2); // [3,1]
-sampleSize([1, 2, 3], 4); // [2,3,1]
-```
+```js
+sampleSize([1, 2, 3], 2); // [3,1]
+sampleSize([1, 2, 3], 4); // [2,3,1]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### shuffle
-
-Randomizes the order of the values of an array, returning a new array.
-
-Uses the Fisher-Yates algorithm to reorder the elements of the array, based on the [Lodash implementation](https://github.com/lodash/lodash/blob/b2ea6b1cd251796dcb5f9700c4911a7b6223920b/shuffle.js), but as a pure function.
-
-```js
-const shuffle = ([...arr]) => {
-  let m = arr.length;
-  while (m) {
-    const i = Math.floor(Math.random() * m--);
-    [arr[m], arr[i]] = [arr[i], arr[m]];
-  }
-  return arr;
-};
-```
-
+### shuffle
+
+Randomizes the order of the values of an array, returning a new array.
+
+Uses the Fisher-Yates algorithm to reorder the elements of the array, based on the [Lodash implementation](https://github.com/lodash/lodash/blob/b2ea6b1cd251796dcb5f9700c4911a7b6223920b/shuffle.js), but as a pure function.
+
+```js
+const shuffle = ([...arr]) => {
+  let m = arr.length;
+  while (m) {
+    const i = Math.floor(Math.random() * m--);
+    [arr[m], arr[i]] = [arr[i], arr[m]];
+  }
+  return arr;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-const foo = [1, 2, 3];
-shuffle(foo); // [2,3,1], foo = [1,2,3]
-```
+```js
+const foo = [1, 2, 3];
+shuffle(foo); // [2,3,1], foo = [1,2,3]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### similarity
-
-Returns an array of elements that appear in both arrays.
-
-Use `filter()` to remove values that are not part of `values`, determined using `includes()`.
-
+### similarity
+
+Returns an array of elements that appear in both arrays.
+
+Use `filter()` to remove values that are not part of `values`, determined using `includes()`.
+
 ```js
 const similarity = (arr, values) => arr.filter(v => values.includes(v));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 similarity([1, 2, 3], [1, 2, 4]); // [1,2]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sortedIndex
-
-Returns the lowest index at which value should be inserted into array in order to maintain its sort order.
-
-Check if the array is sorted in descending order (loosely).
-Use `Array.findIndex()` to find the appropriate index where the element should be inserted.
-
-```js
-const sortedIndex = (arr, n) => {
-  const isDescending = arr[0] > arr[arr.length - 1];
-  const index = arr.findIndex(el => (isDescending ? n >= el : n <= el));
-  return index === -1 ? arr.length : index;
-};
-```
-
+### sortedIndex
+
+Returns the lowest index at which value should be inserted into array in order to maintain its sort order.
+
+Check if the array is sorted in descending order (loosely).
+Use `Array.findIndex()` to find the appropriate index where the element should be inserted.
+
+```js
+const sortedIndex = (arr, n) => {
+  const isDescending = arr[0] > arr[arr.length - 1];
+  const index = arr.findIndex(el => (isDescending ? n >= el : n <= el));
+  return index === -1 ? arr.length : index;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-sortedIndex([5, 3, 2, 1], 4); // 1
-sortedIndex([30, 50], 40); // 1
-```
+```js
+sortedIndex([5, 3, 2, 1], 4); // 1
+sortedIndex([30, 50], 40); // 1
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### symmetricDifference
-
-Returns the symmetric difference between two arrays.
-
-Create a `Set` from each array, then use `Array.filter()` on each of them to only keep values not contained in the other.
-
+### symmetricDifference
+
+Returns the symmetric difference between two arrays.
+
+Create a `Set` from each array, then use `Array.filter()` on each of them to only keep values not contained in the other.
+
 ```js
 const symmetricDifference = (a, b) => {
   const sA = new Set(a),
     sB = new Set(b);
   return [...a.filter(x => !sB.has(x)), ...b.filter(x => !sA.has(x))];
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 symmetricDifference([1, 2, 3], [1, 2, 4]); // [3,4]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### tail
-
-Returns all elements in an array except for the first one.
-
-Return `arr.slice(1)` if the array's `length` is more than `1`, otherwise, return the whole array.
-
+### tail
+
+Returns all elements in an array except for the first one.
+
+Return `arr.slice(1)` if the array's `length` is more than `1`, otherwise, return the whole array.
+
 ```js
 const tail = arr => (arr.length > 1 ? arr.slice(1) : arr);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 tail([1, 2, 3]); // [2,3]
 tail([1]); // [1]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### take
-
-Returns an array with n elements removed from the beginning.
-
-Use `Array.slice()` to create a slice of the array with `n` elements taken from the beginning.
-
+### take
+
+Returns an array with n elements removed from the beginning.
+
+Use `Array.slice()` to create a slice of the array with `n` elements taken from the beginning.
+
 ```js
 const take = (arr, n = 1) => arr.slice(0, n);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 take([1, 2, 3], 5); // [1, 2, 3]
 take([1, 2, 3], 0); // []
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### takeRight
-
-Returns an array with n elements removed from the end.
-
-Use `Array.slice()` to create a slice of the array with `n` elements taken from the end.
-
+### takeRight
+
+Returns an array with n elements removed from the end.
+
+Use `Array.slice()` to create a slice of the array with `n` elements taken from the end.
+
 ```js
 const takeRight = (arr, n = 1) => arr.slice(arr.length - n, arr.length);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 takeRight([1, 2, 3], 2); // [ 2, 3 ]
 takeRight([1, 2, 3]); // [3]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### union
-
-Returns every element that exists in any of the two arrays once.
-
-Create a `Set` with all values of `a` and `b` and convert to an array.
-
+### union
+
+Returns every element that exists in any of the two arrays once.
+
+Create a `Set` with all values of `a` and `b` and convert to an array.
+
 ```js
 const union = (a, b) => Array.from(new Set([...a, ...b]));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 union([1, 2, 3], [4, 3, 2]); // [1,2,3,4]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### without
-
-Filters out the elements of an array, that have one of the specified values.
-
-Use `Array.filter()` to create an array excluding(using `!Array.includes()`) all given values.
-
-_(For a snippet that mutates the original array see [`pull`](#pull))_
-
+### without
+
+Filters out the elements of an array, that have one of the specified values.
+
+Use `Array.filter()` to create an array excluding(using `!Array.includes()`) all given values.
+
+_(For a snippet that mutates the original array see [`pull`](#pull))_
+
 ```js
 const without = (arr, ...args) => arr.filter(v => !args.includes(v));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 without([2, 1, 2, 3], 1, 2); // [3]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### zip
-
-Creates an array of elements, grouped based on the position in the original arrays.
-
-Use `Math.max.apply()` to get the longest array in the arguments.
-Creates an array with that length as return value and use `Array.from()` with a map-function to create an array of grouped elements.
-If lengths of the argument-arrays vary, `undefined` is used where no value could be found.
-
+### zip
+
+Creates an array of elements, grouped based on the position in the original arrays.
+
+Use `Math.max.apply()` to get the longest array in the arguments.
+Creates an array with that length as return value and use `Array.from()` with a map-function to create an array of grouped elements.
+If lengths of the argument-arrays vary, `undefined` is used where no value could be found.
+
 ```js
 const zip = (...arrays) => {
   const maxLength = Math.max(...arrays.map(x => x.length));
@@ -1686,39 +1686,39 @@ const zip = (...arrays) => {
     return Array.from({ length: arrays.length }, (_, k) => arrays[k][i]);
   });
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 zip(['a', 'b'], [1, 2], [true, false]); // [['a', 1, true], ['b', 2, false]]
 zip(['a'], [1, 2], [true, false]); // [['a', 1, true], [undefined, 2, false]]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### zipObject
-
-Given an array of valid property identifiers and an array of values, return an object associating the properties to the values.
-
-Since an object can have undefined values but not undefined property pointers, the array of properties is used to decide the structure of the resulting object using `Array.reduce()`.
-
+### zipObject
+
+Given an array of valid property identifiers and an array of values, return an object associating the properties to the values.
+
+Since an object can have undefined values but not undefined property pointers, the array of properties is used to decide the structure of the resulting object using `Array.reduce()`.
+
 ```js
 const zipObject = (props, values) =>
   props.reduce((obj, prop, index) => ((obj[prop] = values[index]), obj), {});
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 zipObject(['a', 'b', 'c'], [1, 2]); // {a: 1, b: 2, c: undefined}
 zipObject(['a', 'b'], [1, 2, 3]); // {a: 1, b: 2}
-```
+```
 
 </details>
 
@@ -1727,7 +1727,7 @@ zipObject(['a', 'b'], [1, 2, 3]); // {a: 1, b: 2}
 ---
  ## 🌐 Browser
 
-### arrayToHtmlList
+### arrayToHtmlList ![advanced](/advanced.svg)
 
 Converts the given array elements into `<li>` tags and appends them to the list of the given id.
 
@@ -1750,128 +1750,128 @@ arrayToHtmlList(['item 1', 'item 2'], 'myListID');
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### bottomVisible
-
-Returns `true` if the bottom of the page is visible, `false` otherwise.
-
-Use `scrollY`, `scrollHeight` and `clientHeight` to determine if the bottom of the page is visible.
-
+### bottomVisible
+
+Returns `true` if the bottom of the page is visible, `false` otherwise.
+
+Use `scrollY`, `scrollHeight` and `clientHeight` to determine if the bottom of the page is visible.
+
 ```js
 const bottomVisible = () =>
   document.documentElement.clientHeight + window.scrollY >=
   (document.documentElement.scrollHeight || document.documentElement.clientHeight);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 bottomVisible(); // true
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### copyToClipboard
-
-Copy a string to the clipboard. Only works as a result of user action (i.e. inside a `click` event listener).
-
-Create a new `<textarea>` element, fill it with the supplied data and add it to the HTML document.
-Use `Selection.getRangeAt()`to store the selected range (if any).
-Use `document.execCommand('copy')` to copy to the clipboard.
-Remove the `<textarea>` element from the HTML document.
-Finally, use `Selection().addRange()` to recover the original selected range (if any).
-
-```js
-const copyToClipboard = str => {
-  const el = document.createElement('textarea');
-  el.value = str;
-  el.setAttribute('readonly', '');
-  el.style.position = 'absolute';
-  el.style.left = '-9999px';
-  document.body.appendChild(el);
-  const selected =
-    document.getSelection().rangeCount > 0 ? document.getSelection().getRangeAt(0) : false;
-  el.select();
-  document.execCommand('copy');
-  document.body.removeChild(el);
-  if (selected) {
-    document.getSelection().removeAllRanges();
-    document.getSelection().addRange(selected);
-  }
-};
-```
-
+### copyToClipboard
+
+Copy a string to the clipboard. Only works as a result of user action (i.e. inside a `click` event listener).
+
+Create a new `<textarea>` element, fill it with the supplied data and add it to the HTML document.
+Use `Selection.getRangeAt()`to store the selected range (if any).
+Use `document.execCommand('copy')` to copy to the clipboard.
+Remove the `<textarea>` element from the HTML document.
+Finally, use `Selection().addRange()` to recover the original selected range (if any).
+
+```js
+const copyToClipboard = str => {
+  const el = document.createElement('textarea');
+  el.value = str;
+  el.setAttribute('readonly', '');
+  el.style.position = 'absolute';
+  el.style.left = '-9999px';
+  document.body.appendChild(el);
+  const selected =
+    document.getSelection().rangeCount > 0 ? document.getSelection().getRangeAt(0) : false;
+  el.select();
+  document.execCommand('copy');
+  document.body.removeChild(el);
+  if (selected) {
+    document.getSelection().removeAllRanges();
+    document.getSelection().addRange(selected);
+  }
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-copyToClipboard('Lorem ipsum'); // 'Lorem ipsum' copied to clipboard.
-```
+```js
+copyToClipboard('Lorem ipsum'); // 'Lorem ipsum' copied to clipboard.
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### currentURL
-
-Returns the current URL.
-
-Use `window.location.href` to get current URL.
-
+### currentURL
+
+Returns the current URL.
+
+Use `window.location.href` to get current URL.
+
 ```js
 const currentURL = () => window.location.href;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 currentURL(); // 'https://google.com'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### detectDeviceType
-
-Detects wether the website is being opened in a mobile device or a desktop/laptop.
-
-Use a regular expression to test the `navigator.userAgent` property to figure out if the device is a mobile device or a desktop/laptop.
-
+### detectDeviceType
+
+Detects wether the website is being opened in a mobile device or a desktop/laptop.
+
+Use a regular expression to test the `navigator.userAgent` property to figure out if the device is a mobile device or a desktop/laptop.
+
 ```js
 const detectDeviceType = () =>
   /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)
     ? 'Mobile'
     : 'Desktop';
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 detectDeviceType(); // "Mobile" or "Desktop"
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### elementIsVisibleInViewport
-
-Returns `true` if the element specified is visible in the viewport, `false` otherwise.
-
-Use `Element.getBoundingClientRect()` and the `window.inner(Width|Height)` values
-to determine if a given element is visible in the viewport.
-Omit the second argument to determine if the element is entirely visible, or specify `true` to determine if
-it is partially visible.
-
+### elementIsVisibleInViewport
+
+Returns `true` if the element specified is visible in the viewport, `false` otherwise.
+
+Use `Element.getBoundingClientRect()` and the `window.inner(Width|Height)` values
+to determine if a given element is visible in the viewport.
+Omit the second argument to determine if the element is entirely visible, or specify `true` to determine if
+it is partially visible.
+
 ```js
 const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
   const { top, left, bottom, right } = el.getBoundingClientRect();
@@ -1881,8 +1881,8 @@ const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
         ((left > 0 && left < innerWidth) || (right > 0 && right < innerWidth))
     : top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -1890,137 +1890,137 @@ const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
 // e.g. 100x100 viewport and a 10x10px element at position {top: -1, left: 0, bottom: 9, right: 10}
 elementIsVisibleInViewport(el); // false - (not fully visible)
 elementIsVisibleInViewport(el, true); // true - (partially visible)
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### getScrollPosition
-
-Returns the scroll position of the current page.
-
-Use `pageXOffset` and `pageYOffset` if they are defined, otherwise `scrollLeft` and `scrollTop`.
-You can omit `el` to use a default value of `window`.
-
+### getScrollPosition
+
+Returns the scroll position of the current page.
+
+Use `pageXOffset` and `pageYOffset` if they are defined, otherwise `scrollLeft` and `scrollTop`.
+You can omit `el` to use a default value of `window`.
+
 ```js
 const getScrollPosition = (el = window) => ({
   x: el.pageXOffset !== undefined ? el.pageXOffset : el.scrollLeft,
   y: el.pageYOffset !== undefined ? el.pageYOffset : el.scrollTop
 });
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 getScrollPosition(); // {x: 0, y: 200}
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### getStyle
-
-Returns the value of a CSS rule for the specified element.
-
-Use `Window.getComputedStyle()` to get the value of the CSS rule for the specified element.
-
+### getStyle
+
+Returns the value of a CSS rule for the specified element.
+
+Use `Window.getComputedStyle()` to get the value of the CSS rule for the specified element.
+
 ```js
 const getStyle = (el, ruleName) => getComputedStyle(el)[ruleName];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 getStyle(document.querySelector('p'), 'font-size'); // '16px'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### hasClass
-
-Returns `true` if the element has the specified class, `false` otherwise.
-
-Use `element.classList.contains()` to check if the element has the specified class.
-
+### hasClass
+
+Returns `true` if the element has the specified class, `false` otherwise.
+
+Use `element.classList.contains()` to check if the element has the specified class.
+
 ```js
 const hasClass = (el, className) => el.classList.contains(className);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 hasClass(document.querySelector('p.special'), 'special'); // true
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### hide
-
-Hides all the elements specified.
-
-Use the spread operator (`...`) and `Array.forEach()` to apply `display: none` to each element specified.
-
+### hide
+
+Hides all the elements specified.
+
+Use the spread operator (`...`) and `Array.forEach()` to apply `display: none` to each element specified.
+
 ```js
 const hide = (...el) => [...el].forEach(e => (e.style.display = 'none'));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 hide(document.querySelectorAll('img')); // Hides all <img> elements on the page
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### httpsRedirect
-
-Redirects the page to HTTPS if its currently in HTTP. Also, pressing the back button doesn't take it back to the HTTP page as its replaced in the history.
-
-Use `location.protocol` to get the protocol currently being used. If it's not HTTPS, use `location.replace()` to replace the existing page with the HTTPS version of the page. Use `location.href` to get the full address, split it with `String.split()` and remove the protocol part of the URL.  
-
-```js
-const httpsRedirect = () => {
-  if (location.protocol !== 'https:') location.replace('https://' + location.href.split('//')[1]);
-};
-```
-
+### httpsRedirect
+
+Redirects the page to HTTPS if its currently in HTTP. Also, pressing the back button doesn't take it back to the HTTP page as its replaced in the history.
+
+Use `location.protocol` to get the protocol currently being used. If it's not HTTPS, use `location.replace()` to replace the existing page with the HTTPS version of the page. Use `location.href` to get the full address, split it with `String.split()` and remove the protocol part of the URL.  
+
+```js
+const httpsRedirect = () => {
+  if (location.protocol !== 'https:') location.replace('https://' + location.href.split('//')[1]);
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-httpsRedirect(); // If you are on http://mydomain.com, you are redirected to https://mydomain.com
-```
+```js
+httpsRedirect(); // If you are on http://mydomain.com, you are redirected to https://mydomain.com
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### onUserInputChange
-
-Run the callback whenever the user input type changes (`mouse` or `touch`). Useful for enabling/disabling code depending on the input device. This process is dynamic and works with hybrid devices (e.g. touchscreen laptops).
-
-Use two event listeners. Assume `mouse` input initially and bind a `touchstart` event listener to the document. 
-On `touchstart`, add a `mousemove` event listener to listen for two consecutive `mousemove` events firing within 20ms, using `performance.now()`.
-Run the callback with the input type as an argument in either of these situations.
-
+### onUserInputChange
+
+Run the callback whenever the user input type changes (`mouse` or `touch`). Useful for enabling/disabling code depending on the input device. This process is dynamic and works with hybrid devices (e.g. touchscreen laptops).
+
+Use two event listeners. Assume `mouse` input initially and bind a `touchstart` event listener to the document. 
+On `touchstart`, add a `mousemove` event listener to listen for two consecutive `mousemove` events firing within 20ms, using `performance.now()`.
+Run the callback with the input type as an argument in either of these situations.
+
 ```js
 const onUserInputChange = callback => {
   let type = 'mouse',
@@ -2036,8 +2036,8 @@ const onUserInputChange = callback => {
     (type = 'touch'), callback(type), document.addEventListener('mousemove', mousemoveHandler);
   });
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -2045,102 +2045,102 @@ const onUserInputChange = callback => {
 onUserInputChange(type => {
   console.log('The user is now using', type, 'as an input method.');
 });
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### redirect
-
-Redirects to a specified URL.
-
-Use `window.location.href` or `window.location.replace()` to redirect to `url`.
-Pass a second argument to simulate a link click (`true` - default) or an HTTP redirect (`false`).
-
+### redirect
+
+Redirects to a specified URL.
+
+Use `window.location.href` or `window.location.replace()` to redirect to `url`.
+Pass a second argument to simulate a link click (`true` - default) or an HTTP redirect (`false`).
+
 ```js
 const redirect = (url, asLink = true) =>
   asLink ? (window.location.href = url) : window.location.replace(url);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 redirect('https://google.com');
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### runAsync
-
-Runs a function in a separate thread by using a [Web Worker](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers), allowing long running functions to not block the UI.
-
-Create a new `Worker` using a `Blob` object URL, the contents of which should be the stringified version of the supplied function.
-Immediately post the return value of calling the function back.
-Return a promise, listening for `onmessage` and `onerror` events and resolving the data posted back from the worker, or throwing an error.
-
-```js
-const runAsync = fn => {
-  const blob = `var fn = ${fn.toString()}; postMessage(fn());`;
-  const worker = new Worker(
-    URL.createObjectURL(new Blob([blob]), {
-      type: 'application/javascript; charset=utf-8'
-    })
-  );
-  return new Promise((res, rej) => {
-    worker.onmessage = ({ data }) => {
-      res(data), worker.terminate();
-    };
-    worker.onerror = err => {
-      rej(err), worker.terminate();
-    };
-  });
-};
-```
-
+### runAsync
+
+Runs a function in a separate thread by using a [Web Worker](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers), allowing long running functions to not block the UI.
+
+Create a new `Worker` using a `Blob` object URL, the contents of which should be the stringified version of the supplied function.
+Immediately post the return value of calling the function back.
+Return a promise, listening for `onmessage` and `onerror` events and resolving the data posted back from the worker, or throwing an error.
+
+```js
+const runAsync = fn => {
+  const blob = `var fn = ${fn.toString()}; postMessage(fn());`;
+  const worker = new Worker(
+    URL.createObjectURL(new Blob([blob]), {
+      type: 'application/javascript; charset=utf-8'
+    })
+  );
+  return new Promise((res, rej) => {
+    worker.onmessage = ({ data }) => {
+      res(data), worker.terminate();
+    };
+    worker.onerror = err => {
+      rej(err), worker.terminate();
+    };
+  });
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-const longRunningFunction = () => {
-  let result = 0;
-  for (let i = 0; i < 1000; i++) {
-    for (let j = 0; j < 700; j++) {
-      for (let k = 0; k < 300; k++) {
-        result = result + i + j + k;
-      }
-    }
-  }
-  return result;
-};
-/*
-  NOTE: Since the function is running in a different context, closures are not supported.
-  The function supplied to `runAsync` gets stringified, so everything becomes literal.
-  All variables and functions must be defined inside.
-*/
-runAsync(longRunningFunction).then(console.log); // 209685000000
-runAsync(() => 10 ** 3).then(console.log); // 1000
-let outsideVariable = 50;
-runAsync(() => typeof outsideVariable).then(console.log); // 'undefined'
-```
+```js
+const longRunningFunction = () => {
+  let result = 0;
+  for (let i = 0; i < 1000; i++) {
+    for (let j = 0; j < 700; j++) {
+      for (let k = 0; k < 300; k++) {
+        result = result + i + j + k;
+      }
+    }
+  }
+  return result;
+};
+/*
+  NOTE: Since the function is running in a different context, closures are not supported.
+  The function supplied to `runAsync` gets stringified, so everything becomes literal.
+  All variables and functions must be defined inside.
+*/
+runAsync(longRunningFunction).then(console.log); // 209685000000
+runAsync(() => 10 ** 3).then(console.log); // 1000
+let outsideVariable = 50;
+runAsync(() => typeof outsideVariable).then(console.log); // 'undefined'
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### scrollToTop
-
-Smooth-scrolls to the top of the page.
-
-Get distance from top using `document.documentElement.scrollTop` or `document.body.scrollTop`.
-Scroll by a fraction of the distance from the top. Use `window.requestAnimationFrame()` to animate the scrolling.
-
+### scrollToTop
+
+Smooth-scrolls to the top of the page.
+
+Get distance from top using `document.documentElement.scrollTop` or `document.body.scrollTop`.
+Scroll by a fraction of the distance from the top. Use `window.requestAnimationFrame()` to animate the scrolling.
+
 ```js
 const scrollToTop = () => {
   const c = document.documentElement.scrollTop || document.body.scrollTop;
@@ -2149,134 +2149,134 @@ const scrollToTop = () => {
     window.scrollTo(0, c - c / 8);
   }
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 scrollToTop();
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### setStyle
-
-Sets the value of a CSS rule for the specified element.
-
-Use `element.style` to set the value of the CSS rule for the specified element to `value`.
-
+### setStyle
+
+Sets the value of a CSS rule for the specified element.
+
+Use `element.style` to set the value of the CSS rule for the specified element to `value`.
+
 ```js
 const setStyle = (el, ruleName, value) => (el.style[ruleName] = value);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 setStyle(document.querySelector('p'), 'font-size', '20px'); // The first <p> element on the page will have a font-size of 20px
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### show
-
-Shows all the elements specified.
-
-Use the spread operator (`...`) and `Array.forEach()` to clear the `display` property for each element specified.
-
+### show
+
+Shows all the elements specified.
+
+Use the spread operator (`...`) and `Array.forEach()` to clear the `display` property for each element specified.
+
 ```js
 const show = (...el) => [...el].forEach(e => (e.style.display = ''));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 show(document.querySelectorAll('img')); // Shows all <img> elements on the page
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### speechSynthesis
-
-Performs speech synthesis (experimental).
-
-Use `SpeechSynthesisUtterance.voice` and `window.speechSynthesis.getVoices()` to convert a message to speech.
-Use `window.speechSynthesis.speak()` to play the message.
-
-Learn more about the [SpeechSynthesisUtterance interface of the Web Speech API](https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesisUtterance).
-
+### speechSynthesis
+
+Performs speech synthesis (experimental).
+
+Use `SpeechSynthesisUtterance.voice` and `window.speechSynthesis.getVoices()` to convert a message to speech.
+Use `window.speechSynthesis.speak()` to play the message.
+
+Learn more about the [SpeechSynthesisUtterance interface of the Web Speech API](https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesisUtterance).
+
 ```js
 const speechSynthesis = message => {
   const msg = new SpeechSynthesisUtterance(message);
   msg.voice = window.speechSynthesis.getVoices()[0];
   window.speechSynthesis.speak(msg);
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 speechSynthesis('Hello, World'); // // plays the message
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### toggleClass
-
-Toggle a class for an element.
-
-Use `element.classList.toggle()` to toggle the specified class for the element.
-
+### toggleClass
+
+Toggle a class for an element.
+
+Use `element.classList.toggle()` to toggle the specified class for the element.
+
 ```js
 const toggleClass = (el, className) => el.classList.toggle(className);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 toggleClass(document.querySelector('p.special'), 'special'); // The paragraph will not have the 'special' class anymore
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### UUIDGeneratorBrowser
-
-Generates a UUID in a browser.
-
-Use `crypto` API to generate a UUID, compliant with [RFC4122](https://www.ietf.org/rfc/rfc4122.txt) version 4.
-
+### UUIDGeneratorBrowser
+
+Generates a UUID in a browser.
+
+Use `crypto` API to generate a UUID, compliant with [RFC4122](https://www.ietf.org/rfc/rfc4122.txt) version 4.
+
 ```js
 const UUIDGeneratorBrowser = () =>
   ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c =>
     (c ^ (crypto.getRandomValues(new Uint8Array(1))[0] & (15 >> (c / 4)))).toString(16)
   );
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 UUIDGeneratorBrowser(); // '7982fcfe-5721-4632-bede-6000885be57d'
-```
+```
 
 </details>
 
@@ -2285,100 +2285,100 @@ UUIDGeneratorBrowser(); // '7982fcfe-5721-4632-bede-6000885be57d'
 ---
  ## ⏱️ Date
 
-### formatDuration
-
-Returns the human readable format of the given number of milliseconds.
-
-Divide `ms` with the appropriate values to obtain the appropriate values for `day`, `hour`, `minute`, `second` and `millisecond`.
-Use `Object.entries()` with `Array.filter()` to keep only non-zero values.
-Use `Array.map()` to create the string for each value, pluralizing appropriately.
-Use `String.join(', ')` to combine the values into a string.
-
-```js
-const formatDuration = ms => {
-  if (ms < 0) ms = -ms;
-  const time = {
-    day: Math.floor(ms / 86400000),
-    hour: Math.floor(ms / 3600000) % 24,
-    minute: Math.floor(ms / 60000) % 60,
-    second: Math.floor(ms / 1000) % 60,
-    millisecond: Math.floor(ms) % 1000
-  };
-  return Object.entries(time)
-    .filter(val => val[1] !== 0)
-    .map(val => val[1] + ' ' + (val[1] !== 1 ? val[0] + 's' : val[0]))
-    .join(', ');
-};
-```
-
+### formatDuration
+
+Returns the human readable format of the given number of milliseconds.
+
+Divide `ms` with the appropriate values to obtain the appropriate values for `day`, `hour`, `minute`, `second` and `millisecond`.
+Use `Object.entries()` with `Array.filter()` to keep only non-zero values.
+Use `Array.map()` to create the string for each value, pluralizing appropriately.
+Use `String.join(', ')` to combine the values into a string.
+
+```js
+const formatDuration = ms => {
+  if (ms < 0) ms = -ms;
+  const time = {
+    day: Math.floor(ms / 86400000),
+    hour: Math.floor(ms / 3600000) % 24,
+    minute: Math.floor(ms / 60000) % 60,
+    second: Math.floor(ms / 1000) % 60,
+    millisecond: Math.floor(ms) % 1000
+  };
+  return Object.entries(time)
+    .filter(val => val[1] !== 0)
+    .map(val => val[1] + ' ' + (val[1] !== 1 ? val[0] + 's' : val[0]))
+    .join(', ');
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-formatDuration(1001); // '1 second, 1 millisecond'
-formatDuration(34325055574); // '397 days, 6 hours, 44 minutes, 15 seconds, 574 milliseconds'
-```
+```js
+formatDuration(1001); // '1 second, 1 millisecond'
+formatDuration(34325055574); // '397 days, 6 hours, 44 minutes, 15 seconds, 574 milliseconds'
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### getDaysDiffBetweenDates
-
-Returns the difference (in days) between two dates.
-
-Calculate the difference (in days) between two `Date` objects.
-
+### getDaysDiffBetweenDates
+
+Returns the difference (in days) between two dates.
+
+Calculate the difference (in days) between two `Date` objects.
+
 ```js
 const getDaysDiffBetweenDates = (dateInitial, dateFinal) =>
   (dateFinal - dateInitial) / (1000 * 3600 * 24);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 getDaysDiffBetweenDates(new Date('2017-12-13'), new Date('2017-12-22')); // 9
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### JSONToDate
-
-Converts a JSON object to a date.
-
-Use `Date()`, to convert dates in JSON format to readable format (`dd/mm/yyyy`).
-
+### JSONToDate
+
+Converts a JSON object to a date.
+
+Use `Date()`, to convert dates in JSON format to readable format (`dd/mm/yyyy`).
+
 ```js
 const JSONToDate = arr => {
   const dt = new Date(parseInt(arr.toString().substr(6)));
   return `${dt.getDate()}/${dt.getMonth() + 1}/${dt.getFullYear()}`;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 JSONToDate(/Date(1489525200000)/); // "14/3/2017"
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### toEnglishDate
-
-Converts a date from American format to English format.
-
-Use `Date.toISOString()`, `split('T')` and `replace()` to convert a date from American format to the English format.
-Throws an error if the passed time cannot be converted to a date.
-
+### toEnglishDate
+
+Converts a date from American format to English format.
+
+Use `Date.toISOString()`, `split('T')` and `replace()` to convert a date from American format to the English format.
+Throws an error if the passed time cannot be converted to a date.
+
 ```js
 const toEnglishDate = time => {
   try {
@@ -2388,35 +2388,35 @@ const toEnglishDate = time => {
       .replace(/-/g, '/');
   } catch (e) {}
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 toEnglishDate('09/21/2010'); // '21/09/2010'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### tomorrow
-
-Results in a string representation of tomorrow's date.
-Use `new Date()` to get today's date, adding `86400000` of seconds to it(24 hours), using `toISOString` to convert Date object to string.
-
+### tomorrow
+
+Results in a string representation of tomorrow's date.
+Use `new Date()` to get today's date, adding `86400000` of seconds to it(24 hours), using `toISOString` to convert Date object to string.
+
 ```js
 const tomorrow = () => new Date(new Date().getTime() + 86400000).toISOString().split('T')[0];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 tomorrow(); // 2017-12-27 (if current date is 2017-12-26)
-```
+```
 
 </details>
 
@@ -2425,20 +2425,20 @@ tomorrow(); // 2017-12-27 (if current date is 2017-12-26)
 ---
  ## 🎛️ Function
 
-### chainAsync
-
-Chains asynchronous functions.
-
-Loop through an array of functions containing asynchronous events, calling `next` when each asynchronous event has completed.
-
+### chainAsync
+
+Chains asynchronous functions.
+
+Loop through an array of functions containing asynchronous events, calling `next` when each asynchronous event has completed.
+
 ```js
 const chainAsync = fns => {
   let curr = 0;
   const next = () => fns[curr++](next);
   next();
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -2452,24 +2452,24 @@ chainAsync([
     console.log('1 second');
   }
 ]);
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### compose
-
-Performs right-to-left function composition.
-
-Use `Array.reduce()` to perform right-to-left function composition.
-The last (rightmost) function can accept one or more arguments; the remaining functions must be unary.
-
+### compose
+
+Performs right-to-left function composition.
+
+Use `Array.reduce()` to perform right-to-left function composition.
+The last (rightmost) function can accept one or more arguments; the remaining functions must be unary.
+
 ```js
 const compose = (...fns) => fns.reduce((f, g) => (...args) => f(g(...args)));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -2478,191 +2478,191 @@ const add5 = x => x + 5;
 const multiply = (x, y) => x * y;
 const multiplyAndAdd5 = compose(add5, multiply);
 multiplyAndAdd5(5, 2); // 15
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### curry
-
-Curries a function.
-
-Use recursion.
-If the number of provided arguments (`args`) is sufficient, call the passed function `fn`.
-Otherwise, return a curried function `fn` that expects the rest of the arguments.
-If you want to curry a function that accepts a variable number of arguments (a variadic function, e.g. `Math.min()`), you can optionally pass the number of arguments to the second parameter `arity`.
-
+### curry
+
+Curries a function.
+
+Use recursion.
+If the number of provided arguments (`args`) is sufficient, call the passed function `fn`.
+Otherwise, return a curried function `fn` that expects the rest of the arguments.
+If you want to curry a function that accepts a variable number of arguments (a variadic function, e.g. `Math.min()`), you can optionally pass the number of arguments to the second parameter `arity`.
+
 ```js
 const curry = (fn, arity = fn.length, ...args) =>
   arity <= args.length ? fn(...args) : curry.bind(null, fn, arity, ...args);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 curry(Math.pow)(2)(10); // 1024
 curry(Math.min, 3)(10)(50)(2); // 2
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### defer
-
-Defers invoking a function until the current call stack has cleared.
-
-Use `setTimeout()` with a timeout of 1ms to add a new event to the browser event queue and allow the rendering engine to complete its work. Use the spread (`...`) operator to supply the function with an arbitrary number of arguments.
-
-```js
-const defer = (fn, ...args) => setTimeout(fn, 1, ...args);
-```
-
+### defer
+
+Defers invoking a function until the current call stack has cleared.
+
+Use `setTimeout()` with a timeout of 1ms to add a new event to the browser event queue and allow the rendering engine to complete its work. Use the spread (`...`) operator to supply the function with an arbitrary number of arguments.
+
+```js
+const defer = (fn, ...args) => setTimeout(fn, 1, ...args);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-// Example A:
-defer(console.log, 'a'), console.log('b'); // logs 'b' then 'a'
-
-// Example B:
-document.querySelector('#someElement').innerHTML = 'Hello';
-longRunningFunction(); //Browser will not update the HTML until this has finished
-defer(longRunningFunction); // Browser will update the HTML then run the function
-```
+```js
+// Example A:
+defer(console.log, 'a'), console.log('b'); // logs 'b' then 'a'
+
+// Example B:
+document.querySelector('#someElement').innerHTML = 'Hello';
+longRunningFunction(); //Browser will not update the HTML until this has finished
+defer(longRunningFunction); // Browser will update the HTML then run the function
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### functionName
-
-Logs the name of a function.
-
-Use `console.debug()` and the `name` property of the passed method to log the method's name to the `debug` channel of the console.
-
+### functionName
+
+Logs the name of a function.
+
+Use `console.debug()` and the `name` property of the passed method to log the method's name to the `debug` channel of the console.
+
 ```js
 const functionName = fn => (console.debug(fn.name), fn);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 functionName(Math.max); // max (logged in debug channel of console)
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### memoize
-
-Returns the memoized (cached) function.
-
-Create an empty cache by instantiating a new `Map` object.
-Return a function which takes a single argument to be supplied to the memoized function by first checking if the function's output for that specific input value is already cached, or store and return it if not. The `function` keyword must be used in order to allow the memoized function to have its `this` context changed if necessary.
-Allow access to the `cache` by setting it as a property on the returned function.
-
-```js
-const memoize = fn => {
-  const cache = new Map();
-  const cached = function(val) {
-    return cache.has(val) ? cache.get(val) : cache.set(val, fn.call(this, val)) && cache.get(val);
-  };
-  cached.cache = cache;
-  return cached;
-};
-```
-
+### memoize
+
+Returns the memoized (cached) function.
+
+Create an empty cache by instantiating a new `Map` object.
+Return a function which takes a single argument to be supplied to the memoized function by first checking if the function's output for that specific input value is already cached, or store and return it if not. The `function` keyword must be used in order to allow the memoized function to have its `this` context changed if necessary.
+Allow access to the `cache` by setting it as a property on the returned function.
+
+```js
+const memoize = fn => {
+  const cache = new Map();
+  const cached = function(val) {
+    return cache.has(val) ? cache.get(val) : cache.set(val, fn.call(this, val)) && cache.get(val);
+  };
+  cached.cache = cache;
+  return cached;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-// See the `anagrams` snippet.
-const anagramsCached = memoize(anagrams);
-anagramsCached('javascript'); // takes a long time
-anagramsCached('javascript'); // returns virtually instantly since it's now cached
-console.log(anagramsCached.cache); // The cached anagrams map
-```
+```js
+// See the `anagrams` snippet.
+const anagramsCached = memoize(anagrams);
+anagramsCached('javascript'); // takes a long time
+anagramsCached('javascript'); // returns virtually instantly since it's now cached
+console.log(anagramsCached.cache); // The cached anagrams map
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### once
-
-Ensures a function is called only once.
-
-Utilizing a closure, use a flag, `called`, and set it to `true` once the function is called for the first time, preventing it from being called again. In order to allow the function to have its `this` context changed (such as in an event listener), the `function` keyword must be used, and the supplied function must have the context applied.
-Allow the function to be supplied with an arbitrary number of arguments using the rest/spread (`...`) operator.
-
-```js
-const once = fn => {
-  let called = false;
-  return function(...args) {
-    if (called) return;
-    called = true;
-    return fn.apply(this, args);
-  };
-};
-```
-
+### once
+
+Ensures a function is called only once.
+
+Utilizing a closure, use a flag, `called`, and set it to `true` once the function is called for the first time, preventing it from being called again. In order to allow the function to have its `this` context changed (such as in an event listener), the `function` keyword must be used, and the supplied function must have the context applied.
+Allow the function to be supplied with an arbitrary number of arguments using the rest/spread (`...`) operator.
+
+```js
+const once = fn => {
+  let called = false;
+  return function(...args) {
+    if (called) return;
+    called = true;
+    return fn.apply(this, args);
+  };
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-const startApp = function(event) {
-  console.log(this, event); // document.body, MouseEvent
-};
-document.body.addEventListener('click', once(startApp)); // only runs `startApp` once upon click
-```
+```js
+const startApp = function(event) {
+  console.log(this, event); // document.body, MouseEvent
+};
+document.body.addEventListener('click', once(startApp)); // only runs `startApp` once upon click
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### runPromisesInSeries
-
-Runs an array of promises in series.
-
-Use `Array.reduce()` to create a promise chain, where each promise returns the next promise when resolved.
-
+### runPromisesInSeries
+
+Runs an array of promises in series.
+
+Use `Array.reduce()` to create a promise chain, where each promise returns the next promise when resolved.
+
 ```js
 const runPromisesInSeries = ps => ps.reduce((p, next) => p.then(next), Promise.resolve());
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const delay = d => new Promise(r => setTimeout(r, d));
 runPromisesInSeries([() => delay(1000), () => delay(2000)]); // Executes each promise sequentially, taking a total of 3 seconds to complete
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sleep
-
-Delays the execution of an asynchronous function.
-
-Delay executing part of an `async` function, by putting it to sleep, returning a `Promise`.
-
+### sleep
+
+Delays the execution of an asynchronous function.
+
+Delay executing part of an `async` function, by putting it to sleep, returning a `Promise`.
+
 ```js
 const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -2672,7 +2672,7 @@ async function sleepyWork() {
   await sleep(1000);
   console.log('I woke up after 1 second.');
 }
-```
+```
 
 </details>
 
@@ -2681,23 +2681,23 @@ async function sleepyWork() {
 ---
  ## 🔮 Logic
 
-### negate
-
-Negates a predicate function.
-
-Take a predicate function and apply `not` to it with its arguments.
-
+### negate
+
+Negates a predicate function.
+
+Take a predicate function and apply `not` to it with its arguments.
+
 ```js
 const negate = func => (...args) => !func(...args);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 filter([1, 2, 3, 4, 5, 6], negate(isEven)); // [1, 3, 5]
 negate(isOdd)(1); // false
-```
+```
 
 </details>
 
@@ -2706,183 +2706,183 @@ negate(isOdd)(1); // false
 ---
  ## ➗ Math
 
-### average
-
-Returns the average of an of two or more numbers/arrays.
-
-Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`, divide by the `length` of the array.
-
+### average
+
+Returns the average of an of two or more numbers/arrays.
+
+Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`, divide by the `length` of the array.
+
 ```js
 const average = (...arr) => {
   const nums = [].concat(...arr);
   return nums.reduce((acc, val) => acc + val, 0) / nums.length;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 average([1, 2, 3]); // 2
 average(1, 2, 3); // 2
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### clampNumber
-
-Clamps `num` within the inclusive range specified by the boundary values `a` and `b`.
-
-If `num` falls within the range, return `num`.
-Otherwise, return the nearest number in the range.
-
+### clampNumber
+
+Clamps `num` within the inclusive range specified by the boundary values `a` and `b`.
+
+If `num` falls within the range, return `num`.
+Otherwise, return the nearest number in the range.
+
 ```js
 const clampNumber = (num, a, b) => Math.max(Math.min(num, Math.max(a, b)), Math.min(a, b));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 clampNumber(2, 3, 5); // 3
 clampNumber(1, -1, -5); // -1
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### collatz
-
-Applies the Collatz algorithm.
-
-If `n` is even, return `n/2`. Otherwise, return `3n+1`.
-
+### collatz
+
+Applies the Collatz algorithm.
+
+If `n` is even, return `n/2`. Otherwise, return `3n+1`.
+
 ```js
 const collatz = n => (n % 2 == 0 ? n / 2 : 3 * n + 1);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 collatz(8); // 4
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### digitize
-
-Converts a number to an array of digits.
-
-Convert the number to a string, using spread operators in ES6(`[...string]`) build an array.
-Use `Array.map()` and `parseInt()` to transform each value to an integer.
-
+### digitize
+
+Converts a number to an array of digits.
+
+Convert the number to a string, using spread operators in ES6(`[...string]`) build an array.
+Use `Array.map()` and `parseInt()` to transform each value to an integer.
+
 ```js
 const digitize = n => [...('' + n)].map(i => parseInt(i));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 digitize(123); // [1, 2, 3]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### distance
-
-Returns the distance between two points.
-
-Use `Math.hypot()` to calculate the Euclidean distance between two points.
-
+### distance
+
+Returns the distance between two points.
+
+Use `Math.hypot()` to calculate the Euclidean distance between two points.
+
 ```js
 const distance = (x0, y0, x1, y1) => Math.hypot(x1 - x0, y1 - y0);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 distance(1, 1, 2, 3); // 2.23606797749979
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### elo
-
-Computes the new ratings between two or more opponents using the [Elo rating system](https://en.wikipedia.org/wiki/Elo_rating_system). It takes an array
-of pre-ratings and returns an array containing post-ratings.
-The array should be ordered from best performer to worst performer (winner -> loser).
-
-Use the exponent `**` operator and math operators to compute the expected score (chance of winning)
-of each opponent and compute the new rating for each. Loop through the ratings, using each permutation to compute the post-Elo rating for each player in a pairwise fashion. Omit the second argument to use the default K-factor of 32, or supply a custom K-factor value. For details on the third argument, see the last example.
-
-```js
-const elo = ([...ratings], kFactor = 32, selfRating) => {
-  const [a, b] = ratings;
-  const expectedScore = (self, opponent) => 1 / (1 + 10 ** ((opponent - self) / 400));
-  const newRating = (rating, i) =>
-    (selfRating || rating) + kFactor * (i - expectedScore(i ? a : b, i ? b : a));
-  if (ratings.length === 2) {
-    return [newRating(a, 1), newRating(b, 0)];
-  } else {
-    for (let i = 0; i < ratings.length; i++) {
-      let j = i;
-      while (j < ratings.length - 1) {
-        [ratings[i], ratings[j + 1]] = elo([ratings[i], ratings[j + 1]], kFactor);
-        j++;
-      }
-    }
-  }
-  return ratings;
-};
-```
-
+### elo
+
+Computes the new ratings between two or more opponents using the [Elo rating system](https://en.wikipedia.org/wiki/Elo_rating_system). It takes an array
+of pre-ratings and returns an array containing post-ratings.
+The array should be ordered from best performer to worst performer (winner -> loser).
+
+Use the exponent `**` operator and math operators to compute the expected score (chance of winning)
+of each opponent and compute the new rating for each. Loop through the ratings, using each permutation to compute the post-Elo rating for each player in a pairwise fashion. Omit the second argument to use the default K-factor of 32, or supply a custom K-factor value. For details on the third argument, see the last example.
+
+```js
+const elo = ([...ratings], kFactor = 32, selfRating) => {
+  const [a, b] = ratings;
+  const expectedScore = (self, opponent) => 1 / (1 + 10 ** ((opponent - self) / 400));
+  const newRating = (rating, i) =>
+    (selfRating || rating) + kFactor * (i - expectedScore(i ? a : b, i ? b : a));
+  if (ratings.length === 2) {
+    return [newRating(a, 1), newRating(b, 0)];
+  } else {
+    for (let i = 0; i < ratings.length; i++) {
+      let j = i;
+      while (j < ratings.length - 1) {
+        [ratings[i], ratings[j + 1]] = elo([ratings[i], ratings[j + 1]], kFactor);
+        j++;
+      }
+    }
+  }
+  return ratings;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-// Standard 1v1s
-elo([1200, 1200]); // [1216, 1184]
-elo([1200, 1200], 64); // [1232, 1168]
-// 4 player FFA, all same rank
-elo([1200, 1200, 1200, 1200]).map(Math.round); // [1246, 1215, 1185, 1154]
-/*
-For teams, each rating can adjusted based on own team's average rating vs. 
-average rating of opposing team, with the score being added to their
-own individual rating by supplying it as the third argument.
-*/
-```
+```js
+// Standard 1v1s
+elo([1200, 1200]); // [1216, 1184]
+elo([1200, 1200], 64); // [1232, 1168]
+// 4 player FFA, all same rank
+elo([1200, 1200, 1200, 1200]).map(Math.round); // [1246, 1215, 1185, 1154]
+/*
+For teams, each rating can adjusted based on own team's average rating vs. 
+average rating of opposing team, with the score being added to their
+own individual rating by supplying it as the third argument.
+*/
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### factorial
-
-Calculates the factorial of a number.
-
-Use recursion.
-If `n` is less than or equal to `1`, return `1`.
-Otherwise, return the product of `n` and the factorial of `n - 1`.
-Throws an exception if `n` is a negative number.
-
+### factorial
+
+Calculates the factorial of a number.
+
+Use recursion.
+If `n` is less than or equal to `1`, return `1`.
+Otherwise, return the product of `n` and the factorial of `n - 1`.
+Throws an exception if `n` is a negative number.
+
 ```js
 const factorial = n =>
   n < 0
@@ -2890,283 +2890,283 @@ const factorial = n =>
         throw new TypeError('Negative numbers are not allowed!');
       })()
     : n <= 1 ? 1 : n * factorial(n - 1);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 factorial(6); // 720
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### factors
-
-Returns the array of factors of the given `num`. 
-If the second argument is set to `true` returns only the prime factors of `num`.
-If `num` is `1` or `0` returns an empty array.
-If `num` is less than `0` returns all the factors of `-int` together with their additive inverses.
-
-Use `Array.from()`, `Array.map()` and `Array.filter()` to find all the factors of `num`.
-If given `num` is negative, use `Array.reduce()` to add the additive inverses to the array.
-Return all results if `primes` is `false`, else determine and return only the prime factors using `isPrime` and `Array.filter()`.
-Omit the second argument, `primes`, to return prime and non-prime factors by default.
-
-**Note**:- _Negative numbers are not considered prime._
-
-```js
-const factors = (num, primes = false) => {
-  const isPrime = num => {
-    const boundary = Math.floor(Math.sqrt(num));
-    for (var i = 2; i <= boundary; i++) if (num % i === 0) return false;
-    return num >= 2;
-  };
-  const isNeg = num < 0;
-  num = isNeg ? -num : num;
-  let array = Array.from({ length: num - 1 })
-    .map((val, i) => (num % (i + 2) === 0 ? i + 2 : false))
-    .filter(val => val);
-  if (isNeg)
-    array = array.reduce((acc, val) => {
-      acc.push(val);
-      acc.push(-val);
-      return acc;
-    }, []);
-  return primes ? array.filter(isPrime) : array;
-};
-```
-
+### factors
+
+Returns the array of factors of the given `num`. 
+If the second argument is set to `true` returns only the prime factors of `num`.
+If `num` is `1` or `0` returns an empty array.
+If `num` is less than `0` returns all the factors of `-int` together with their additive inverses.
+
+Use `Array.from()`, `Array.map()` and `Array.filter()` to find all the factors of `num`.
+If given `num` is negative, use `Array.reduce()` to add the additive inverses to the array.
+Return all results if `primes` is `false`, else determine and return only the prime factors using `isPrime` and `Array.filter()`.
+Omit the second argument, `primes`, to return prime and non-prime factors by default.
+
+**Note**:- _Negative numbers are not considered prime._
+
+```js
+const factors = (num, primes = false) => {
+  const isPrime = num => {
+    const boundary = Math.floor(Math.sqrt(num));
+    for (var i = 2; i <= boundary; i++) if (num % i === 0) return false;
+    return num >= 2;
+  };
+  const isNeg = num < 0;
+  num = isNeg ? -num : num;
+  let array = Array.from({ length: num - 1 })
+    .map((val, i) => (num % (i + 2) === 0 ? i + 2 : false))
+    .filter(val => val);
+  if (isNeg)
+    array = array.reduce((acc, val) => {
+      acc.push(val);
+      acc.push(-val);
+      return acc;
+    }, []);
+  return primes ? array.filter(isPrime) : array;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-factors(12); // [2,3,4,6,12]
-factors(12, true); // [2,3]
-factors(-12); // [2, -2, 3, -3, 4, -4, 6, -6, 12, -12]
-factors(-12, true); // [2,3]
-```
+```js
+factors(12); // [2,3,4,6,12]
+factors(12, true); // [2,3]
+factors(-12); // [2, -2, 3, -3, 4, -4, 6, -6, 12, -12]
+factors(-12, true); // [2,3]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### fibonacci
-
-Generates an array, containing the Fibonacci sequence, up until the nth term.
-
-Create an empty array of the specific length, initializing the first two values (`0` and `1`).
-Use `Array.reduce()` to add values into the array, using the sum of the last two values, except for the first two.
-
+### fibonacci
+
+Generates an array, containing the Fibonacci sequence, up until the nth term.
+
+Create an empty array of the specific length, initializing the first two values (`0` and `1`).
+Use `Array.reduce()` to add values into the array, using the sum of the last two values, except for the first two.
+
 ```js
 const fibonacci = n =>
   Array.from({ length: n }).reduce(
     (acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i),
     []
   );
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 fibonacci(6); // [0, 1, 1, 2, 3, 5]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### fibonacciCountUntilNum
-
-Returns the number of fibonnacci numbers up to `num`(`0` and `num` inclusive).
-
-Use a mathematical formula to calculate the number of fibonacci numbers until `num`.
-
+### fibonacciCountUntilNum
+
+Returns the number of fibonnacci numbers up to `num`(`0` and `num` inclusive).
+
+Use a mathematical formula to calculate the number of fibonacci numbers until `num`.
+
 ```js
 const fibonacciCountUntilNum = num =>
   Math.ceil(Math.log(num * Math.sqrt(5) + 1 / 2) / Math.log((Math.sqrt(5) + 1) / 2));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 fibonacciCountUntilNum(10); // 7
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### fibonacciUntilNum
-
-Generates an array, containing the Fibonacci sequence, up until the nth term.
-
-Create an empty array of the specific length, initializing the first two values (`0` and `1`).
-Use `Array.reduce()` to add values into the array, using the sum of the last two values, except for the first two.
-Uses a mathematical formula to calculate the length of the array required.
-
-```js
-const fibonacciUntilNum = num => {
-  let n = Math.ceil(Math.log(num * Math.sqrt(5) + 1 / 2) / Math.log((Math.sqrt(5) + 1) / 2));
-  return Array.from({ length: n }).reduce(
-    (acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i),
-    []
-  );
-};
-```
-
+### fibonacciUntilNum
+
+Generates an array, containing the Fibonacci sequence, up until the nth term.
+
+Create an empty array of the specific length, initializing the first two values (`0` and `1`).
+Use `Array.reduce()` to add values into the array, using the sum of the last two values, except for the first two.
+Uses a mathematical formula to calculate the length of the array required.
+
+```js
+const fibonacciUntilNum = num => {
+  let n = Math.ceil(Math.log(num * Math.sqrt(5) + 1 / 2) / Math.log((Math.sqrt(5) + 1) / 2));
+  return Array.from({ length: n }).reduce(
+    (acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i),
+    []
+  );
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-fibonacciUntilNum(10); // [ 0, 1, 1, 2, 3, 5, 8 ]
-```
+```js
+fibonacciUntilNum(10); // [ 0, 1, 1, 2, 3, 5, 8 ]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### gcd
-
-Calculates the greatest common divisor between two or more numbers/arrays.
-
-The inner `_gcd` function uses recursion.
-Base case is when `y` equals `0`. In this case, return `x`.
-Otherwise, return the GCD of `y` and the remainder of the division `x/y`.
-
-```js
-const gcd = (...arr) => {
-  const _gcd = (x, y) => (!y ? x : gcd(y, x % y));
-  return [].concat(...arr).reduce((a, b) => _gcd(a, b));
-};
-```
-
+### gcd
+
+Calculates the greatest common divisor between two or more numbers/arrays.
+
+The inner `_gcd` function uses recursion.
+Base case is when `y` equals `0`. In this case, return `x`.
+Otherwise, return the GCD of `y` and the remainder of the division `x/y`.
+
+```js
+const gcd = (...arr) => {
+  const _gcd = (x, y) => (!y ? x : gcd(y, x % y));
+  return [].concat(...arr).reduce((a, b) => _gcd(a, b));
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-gcd(8, 36); // 4
-```
+```js
+gcd(8, 36); // 4
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### geometricProgression
-
-Initializes an array containing the numbers in the specified range where `start` and `end` are inclusive and the ratio between two terms is `step`.
-Returns an error if `step` equals `1`.
-
-Use `Array.from()`, `Math.log()` and `Math.floor()` to create an array of the desired length, `Array.map()` to fill with the desired values in a range.
-Omit the second argument, `start`, to use a default value of `1`.
-Omit the third argument, `step`, to use a default value of `2`.
-
-```js
-const geometricProgression = (end, start = 1, step = 2) =>
-  Array.from({ length: Math.floor(Math.log(end / start) / Math.log(step)) + 1 }).map(
-    (v, i) => start * step ** i
-  );
-```
-
+### geometricProgression
+
+Initializes an array containing the numbers in the specified range where `start` and `end` are inclusive and the ratio between two terms is `step`.
+Returns an error if `step` equals `1`.
+
+Use `Array.from()`, `Math.log()` and `Math.floor()` to create an array of the desired length, `Array.map()` to fill with the desired values in a range.
+Omit the second argument, `start`, to use a default value of `1`.
+Omit the third argument, `step`, to use a default value of `2`.
+
+```js
+const geometricProgression = (end, start = 1, step = 2) =>
+  Array.from({ length: Math.floor(Math.log(end / start) / Math.log(step)) + 1 }).map(
+    (v, i) => start * step ** i
+  );
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-geometricProgression(256); // [1, 2, 4, 8, 16, 32, 64, 128, 256]
-geometricProgression(256, 3); // [3, 6, 12, 24, 48, 96, 192]
-geometricProgression(256, 1, 4); // [1, 4, 16, 64, 256]
-```
+```js
+geometricProgression(256); // [1, 2, 4, 8, 16, 32, 64, 128, 256]
+geometricProgression(256, 3); // [3, 6, 12, 24, 48, 96, 192]
+geometricProgression(256, 1, 4); // [1, 4, 16, 64, 256]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### hammingDistance
-
-Calculates the Hamming distance between two values.
-
-Use XOR operator (`^`) to find the bit difference between the two numbers, convert to a binary string using `toString(2)`.
-Count and return the number of `1`s in the string, using `match(/1/g)`.
-
+### hammingDistance
+
+Calculates the Hamming distance between two values.
+
+Use XOR operator (`^`) to find the bit difference between the two numbers, convert to a binary string using `toString(2)`.
+Count and return the number of `1`s in the string, using `match(/1/g)`.
+
 ```js
 const hammingDistance = (num1, num2) => ((num1 ^ num2).toString(2).match(/1/g) || '').length;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 hammingDistance(2, 3); // 1
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### howManyTimes
-
-Returns the number of times `num` can be divided by `divisor` (integer or fractional) without getting a fractional answer.
-Works for both negative and positive integers.
-
-If `divisor` is `-1` or `1` return `Infinity`.
-If `divisor` is `-0` or `0` return `0`.
-Otherwise, keep dividing `num` with `divisor` and incrementing `i`, while the result is an integer.
-Return the number of times the loop was executed, `i`.
-
-```js
-const howManyTimes = (num, divisor) => {
-  if (divisor === 1 || divisor === -1) return Infinity;
-  if (divisor === 0) return 0;
-  let i = 0;
-  while (Number.isInteger(num / divisor)) {
-    i++;
-    num = num / divisor;
-  }
-  return i;
-};
-```
-
+### howManyTimes
+
+Returns the number of times `num` can be divided by `divisor` (integer or fractional) without getting a fractional answer.
+Works for both negative and positive integers.
+
+If `divisor` is `-1` or `1` return `Infinity`.
+If `divisor` is `-0` or `0` return `0`.
+Otherwise, keep dividing `num` with `divisor` and incrementing `i`, while the result is an integer.
+Return the number of times the loop was executed, `i`.
+
+```js
+const howManyTimes = (num, divisor) => {
+  if (divisor === 1 || divisor === -1) return Infinity;
+  if (divisor === 0) return 0;
+  let i = 0;
+  while (Number.isInteger(num / divisor)) {
+    i++;
+    num = num / divisor;
+  }
+  return i;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-howManyTimes(100, 2); // 2
-howManyTimes(100, 2.5); // 2
-howManyTimes(100, 0); // 0
-howManyTimes(100, -1); // Infinity
-```
+```js
+howManyTimes(100, 2); // 2
+howManyTimes(100, 2.5); // 2
+howManyTimes(100, 0); // 0
+howManyTimes(100, -1); // Infinity
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### inRange
-
-Checks if the given number falls within the given range.
-
-Use arithmetic comparison to check if the given number is in the specified range.
-If the second parameter, `end`, is not specified, the range is considered to be from `0` to `start`.
-
+### inRange
+
+Checks if the given number falls within the given range.
+
+Use arithmetic comparison to check if the given number is in the specified range.
+If the second parameter, `end`, is not specified, the range is considered to be from `0` to `start`.
+
 ```js
 const inRange = (n, start, end = null) => {
   if (end && start > end) end = [start, (start = end)][0];
   return end == null ? n >= 0 && n < start : n >= start && n < end;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -3175,254 +3175,254 @@ inRange(3, 2, 5); // true
 inRange(3, 4); // true
 inRange(2, 3, 5); // false
 inrange(3, 2); // false
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isArmstrongNumber
-
-Checks if the given number is an Armstrong number or not.
-
-Convert the given number into an array of digits. Use the exponent operator (`**`) to get the appropriate power for each digit and sum them up. If the sum is equal to the number itself, return `true` otherwise `false`.
-
-```js
-const isArmstrongNumber = digits =>
-  (arr => arr.reduce((a, d) => a + parseInt(d) ** arr.length, 0) == digits)(
-    (digits + '').split('')
-  );
-```
-
+### isArmstrongNumber
+
+Checks if the given number is an Armstrong number or not.
+
+Convert the given number into an array of digits. Use the exponent operator (`**`) to get the appropriate power for each digit and sum them up. If the sum is equal to the number itself, return `true` otherwise `false`.
+
+```js
+const isArmstrongNumber = digits =>
+  (arr => arr.reduce((a, d) => a + parseInt(d) ** arr.length, 0) == digits)(
+    (digits + '').split('')
+  );
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isArmstrongNumber(1634); // true
-isArmstrongNumber(56); // false
-```
+```js
+isArmstrongNumber(1634); // true
+isArmstrongNumber(56); // false
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isDivisible
-
-Checks if the first numeric argument is divisible by the second one.
-
-Use the modulo operator (`%`) to check if the remainder is equal to `0`.
-
+### isDivisible
+
+Checks if the first numeric argument is divisible by the second one.
+
+Use the modulo operator (`%`) to check if the remainder is equal to `0`.
+
 ```js
 const isDivisible = (dividend, divisor) => dividend % divisor === 0;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 isDivisible(6, 3); // true
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isEven
-
-Returns `true` if the given number is even, `false` otherwise.
-
-Checks whether a number is odd or even using the modulo (`%`) operator.
-Returns `true` if the number is even, `false` if the number is odd.
-
+### isEven
+
+Returns `true` if the given number is even, `false` otherwise.
+
+Checks whether a number is odd or even using the modulo (`%`) operator.
+Returns `true` if the number is even, `false` if the number is odd.
+
 ```js
 const isEven = num => num % 2 === 0;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 isEven(3); // false
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isPrime
-
-Checks if the provided integer is a prime number.
-
-Check numbers from `2` to the square root of the given number.
-Return `false` if any of them divides the given number, else return `true`, unless the number is less than `2`.
-
-```js
-const isPrime = num => {
-  const boundary = Math.floor(Math.sqrt(num));
-  for (var i = 2; i <= boundary; i++) if (num % i == 0) return false;
-  return num >= 2;
-};
-```
-
+### isPrime
+
+Checks if the provided integer is a prime number.
+
+Check numbers from `2` to the square root of the given number.
+Return `false` if any of them divides the given number, else return `true`, unless the number is less than `2`.
+
+```js
+const isPrime = num => {
+  const boundary = Math.floor(Math.sqrt(num));
+  for (var i = 2; i <= boundary; i++) if (num % i == 0) return false;
+  return num >= 2;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isPrime(11); // true
-```
+```js
+isPrime(11); // true
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### lcm
-
-Returns the least common multiple of two or more numbers/arrays.
-
-Use the greatest common divisor (GCD) formula and `Math.abs()` to determine the least common multiple.
-The GCD formula uses recursion.
-
+### lcm
+
+Returns the least common multiple of two or more numbers/arrays.
+
+Use the greatest common divisor (GCD) formula and `Math.abs()` to determine the least common multiple.
+The GCD formula uses recursion.
+
 ```js
 const lcm = (...arr) => {
   const gcd = (x, y) => (!y ? x : gcd(y, x % y));
   const _lcm = (x, y) => x * y / gcd(x, y);
   return [].concat(...arr).reduce((a, b) => _lcm(a, b));
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 lcm(12, 7); // 84
 lcm([1, 3, 4], 5); // 60
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### luhnCheck
-
-Implementation of the [Luhn Algorithm](https://en.wikipedia.org/wiki/Luhn_algorithm) used to validate a variety of identification numbers, such as credit card numbers, IMEI numbers, National Provider Identifier numbers etc.
-
-Use `String.split('')`, `Array.reverse()` and `Array.map()` in combination with `parseInt()` to obtain an array of digits.
-Use `Array.splice(0,1)` to obtain the last digit.
-Use `Array.reduce()` to implement the Luhn Algorithm.
-Return `true` if `sum` is divisible by `10`, `false` otherwise.
-
-
-```js
-const luhnCheck = num => {
-  let arr = (num + '')
-    .split('')
-    .reverse()
-    .map(x => parseInt(x));
-  let lastDigit = arr.splice(0, 1)[0];
-  let sum = arr.reduce((acc, val, i) => (i % 2 !== 0 ? acc + val : acc + (val * 2) % 9 || 9), 0);
-  sum += lastDigit;
-  return sum % 10 === 0;
-};
-```
-
+### luhnCheck
+
+Implementation of the [Luhn Algorithm](https://en.wikipedia.org/wiki/Luhn_algorithm) used to validate a variety of identification numbers, such as credit card numbers, IMEI numbers, National Provider Identifier numbers etc.
+
+Use `String.split('')`, `Array.reverse()` and `Array.map()` in combination with `parseInt()` to obtain an array of digits.
+Use `Array.splice(0,1)` to obtain the last digit.
+Use `Array.reduce()` to implement the Luhn Algorithm.
+Return `true` if `sum` is divisible by `10`, `false` otherwise.
+
+
+```js
+const luhnCheck = num => {
+  let arr = (num + '')
+    .split('')
+    .reverse()
+    .map(x => parseInt(x));
+  let lastDigit = arr.splice(0, 1)[0];
+  let sum = arr.reduce((acc, val, i) => (i % 2 !== 0 ? acc + val : acc + (val * 2) % 9 || 9), 0);
+  sum += lastDigit;
+  return sum % 10 === 0;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-luhnCheck('4485275742308327'); // true
-luhnCheck(6011329933655299); //  true
-luhnCheck(123456789); // false
-```
+```js
+luhnCheck('4485275742308327'); // true
+luhnCheck(6011329933655299); //  true
+luhnCheck(123456789); // false
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### median
-
-Returns the median of an array of numbers.
-
-Find the middle of the array, use `Array.sort()` to sort the values.
-Return the number at the midpoint if `length` is odd, otherwise the average of the two middle numbers.
-
+### median
+
+Returns the median of an array of numbers.
+
+Find the middle of the array, use `Array.sort()` to sort the values.
+Return the number at the midpoint if `length` is odd, otherwise the average of the two middle numbers.
+
 ```js
 const median = arr => {
   const mid = Math.floor(arr.length / 2),
     nums = [...arr].sort((a, b) => a - b);
   return arr.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 median([5, 6, 50, 1, -5]); // 5
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### percentile
-
-Uses the percentile formula to calculate how many numbers in the given array are less or equal to the given value.
-
-Use `Array.reduce()` to calculate how many numbers are below the value and how many are the same value and apply the percentile formula.
-
+### percentile
+
+Uses the percentile formula to calculate how many numbers in the given array are less or equal to the given value.
+
+Use `Array.reduce()` to calculate how many numbers are below the value and how many are the same value and apply the percentile formula.
+
 ```js
 const percentile = (arr, val) =>
   100 * arr.reduce((acc, v) => acc + (v < val ? 1 : 0) + (v === val ? 0.5 : 0), 0) / arr.length;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 percentile([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], 6); // 55
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### powerset
-
-Returns the powerset of a given array of numbers.
-
-Use `Array.reduce()` combined with `Array.map()` to iterate over elements and combine into an array containing all combinations.
-
+### powerset
+
+Returns the powerset of a given array of numbers.
+
+Use `Array.reduce()` combined with `Array.map()` to iterate over elements and combine into an array containing all combinations.
+
 ```js
 const powerset = arr => arr.reduce((a, v) => a.concat(a.map(r => [v].concat(r))), [[]]);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 powerset([1, 2]); // [[], [1], [2], [2,1]]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### primes
-
-Generates primes up to a given number, using the Sieve of Eratosthenes.
-
-Generate an array from `2` to the given number. Use `Array.filter()` to filter out the values divisible by any number from `2` to the square root of the provided number.
-
+### primes
+
+Generates primes up to a given number, using the Sieve of Eratosthenes.
+
+Generate an array from `2` to the given number. Use `Array.filter()` to filter out the values divisible by any number from `2` to the square root of the provided number.
+
 ```js
 const primes = num => {
   let arr = Array.from({ length: num - 1 }).map((x, i) => i + 2),
@@ -3431,218 +3431,218 @@ const primes = num => {
   numsTillSqroot.forEach(x => (arr = arr.filter(y => y % x !== 0 || y == x)));
   return arr;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 primes(10); // [2,3,5,7]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### randomIntegerInRange
-
-Returns a random integer in the specified range.
-
-Use `Math.random()` to generate a random number and map it to the desired range, using `Math.floor()` to make it an integer.
-
+### randomIntegerInRange
+
+Returns a random integer in the specified range.
+
+Use `Math.random()` to generate a random number and map it to the desired range, using `Math.floor()` to make it an integer.
+
 ```js
 const randomIntegerInRange = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 randomIntegerInRange(0, 5); // 2
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### randomNumberInRange
-
-Returns a random number in the specified range.
-
-Use `Math.random()` to generate a random value, map it to the desired range using multiplication.
-
+### randomNumberInRange
+
+Returns a random number in the specified range.
+
+Use `Math.random()` to generate a random value, map it to the desired range using multiplication.
+
 ```js
 const randomNumberInRange = (min, max) => Math.random() * (max - min) + min;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 randomNumberInRange(2, 10); // 6.0211363285087005
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### round
-
-Rounds a number to a specified amount of digits.
-
-Use `Math.round()` and template literals to round the number to the specified number of digits.
-Omit the second argument, `decimals` to round to an integer.
-
+### round
+
+Rounds a number to a specified amount of digits.
+
+Use `Math.round()` and template literals to round the number to the specified number of digits.
+Omit the second argument, `decimals` to round to an integer.
+
 ```js
 const round = (n, decimals = 0) => Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 round(1.005, 2); // 1.01
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### solveRPN
-
-Solves the given mathematical expression in [reverse polish notation](https://en.wikipedia.org/wiki/Reverse_Polish_notation).
-Throws appropriate errors if there are unrecognized symbols or the expression is wrong. The valid operators are :- `+`,`-`,`*`,`/`,`^`,`**` (`^`&`**` are the exponential symbols and are same). This snippet does not supports any unary operators.
-
-Use a dictionary, `OPERATORS` to specify each operator's matching mathematical operation.
-Use `String.replace()` with a regular expression to replace `^` with `**`, `String.split()` to tokenize the string and `Array.filter()` to remove empty tokens.
-Use `Array.forEach()` to parse each `symbol`, evaluate it as a numeric value or operator and solve the mathematical expression.
-Numeric values are converted to floating point numbers and pushed to a `stack`, while operators are evaluated using the `OPERATORS` dictionary and pop elements from the `stack` to apply operations.
-
-```js
-const solveRPN = rpn => {
-  const OPERATORS = {
-    '*': (a, b) => a * b,
-    '+': (a, b) => a + b,
-    '-': (a, b) => a - b,
-    '/': (a, b) => a / b,
-    '**': (a, b) => a ** b
-  };
-  const [stack, solve] = [
-    [],
-    rpn
-      .replace(/\^/g, '**')
-      .split(/\s+/g)
-      .filter(el => !/\s+/.test(el) && el !== '')
-  ];
-  solve.forEach(symbol => {
-    if (!isNaN(parseFloat(symbol)) && isFinite(symbol)) {
-      stack.push(symbol);
-    } else if (Object.keys(OPERATORS).includes(symbol)) {
-      const [a, b] = [stack.pop(), stack.pop()];
-      stack.push(OPERATORS[symbol](parseFloat(b), parseFloat(a)));
-    } else {
-      throw `${symbol} is not a recognized symbol`;
-    }
-  });
-  if (stack.length === 1) return stack.pop();
-  else throw `${rpn} is not a proper RPN. Please check it and try again`;
-};
-```
-
+### solveRPN
+
+Solves the given mathematical expression in [reverse polish notation](https://en.wikipedia.org/wiki/Reverse_Polish_notation).
+Throws appropriate errors if there are unrecognized symbols or the expression is wrong. The valid operators are :- `+`,`-`,`*`,`/`,`^`,`**` (`^`&`**` are the exponential symbols and are same). This snippet does not supports any unary operators.
+
+Use a dictionary, `OPERATORS` to specify each operator's matching mathematical operation.
+Use `String.replace()` with a regular expression to replace `^` with `**`, `String.split()` to tokenize the string and `Array.filter()` to remove empty tokens.
+Use `Array.forEach()` to parse each `symbol`, evaluate it as a numeric value or operator and solve the mathematical expression.
+Numeric values are converted to floating point numbers and pushed to a `stack`, while operators are evaluated using the `OPERATORS` dictionary and pop elements from the `stack` to apply operations.
+
+```js
+const solveRPN = rpn => {
+  const OPERATORS = {
+    '*': (a, b) => a * b,
+    '+': (a, b) => a + b,
+    '-': (a, b) => a - b,
+    '/': (a, b) => a / b,
+    '**': (a, b) => a ** b
+  };
+  const [stack, solve] = [
+    [],
+    rpn
+      .replace(/\^/g, '**')
+      .split(/\s+/g)
+      .filter(el => !/\s+/.test(el) && el !== '')
+  ];
+  solve.forEach(symbol => {
+    if (!isNaN(parseFloat(symbol)) && isFinite(symbol)) {
+      stack.push(symbol);
+    } else if (Object.keys(OPERATORS).includes(symbol)) {
+      const [a, b] = [stack.pop(), stack.pop()];
+      stack.push(OPERATORS[symbol](parseFloat(b), parseFloat(a)));
+    } else {
+      throw `${symbol} is not a recognized symbol`;
+    }
+  });
+  if (stack.length === 1) return stack.pop();
+  else throw `${rpn} is not a proper RPN. Please check it and try again`;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-solveRPN('15 7 1 1 + - / 3 * 2 1 1 + + -'); // 5
-solveRPN('2 3 ^'); // 8
-```
+```js
+solveRPN('15 7 1 1 + - / 3 * 2 1 1 + + -'); // 5
+solveRPN('2 3 ^'); // 8
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### standardDeviation
-
-Returns the standard deviation of an array of numbers.
-
-Use `Array.reduce()` to calculate the mean, variance and the sum of the variance of the values, the variance of the values, then
-determine the standard deviation.
-You can omit the second argument to get the sample standard deviation or set it to `true` to get the population standard deviation.
-
-```js
-const standardDeviation = (arr, usePopulation = false) => {
-  const mean = arr.reduce((acc, val) => acc + val, 0) / arr.length;
-  return Math.sqrt(
-    arr.reduce((acc, val) => acc.concat((val - mean) ** 2), []).reduce((acc, val) => acc + val, 0) /
-      (arr.length - (usePopulation ? 0 : 1))
-  );
-};
-```
-
+### standardDeviation
+
+Returns the standard deviation of an array of numbers.
+
+Use `Array.reduce()` to calculate the mean, variance and the sum of the variance of the values, the variance of the values, then
+determine the standard deviation.
+You can omit the second argument to get the sample standard deviation or set it to `true` to get the population standard deviation.
+
+```js
+const standardDeviation = (arr, usePopulation = false) => {
+  const mean = arr.reduce((acc, val) => acc + val, 0) / arr.length;
+  return Math.sqrt(
+    arr.reduce((acc, val) => acc.concat((val - mean) ** 2), []).reduce((acc, val) => acc + val, 0) /
+      (arr.length - (usePopulation ? 0 : 1))
+  );
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-standardDeviation([10, 2, 38, 23, 38, 23, 21]); // 13.284434142114991 (sample)
-standardDeviation([10, 2, 38, 23, 38, 23, 21], true); // 12.29899614287479 (population)
-```
+```js
+standardDeviation([10, 2, 38, 23, 38, 23, 21]); // 13.284434142114991 (sample)
+standardDeviation([10, 2, 38, 23, 38, 23, 21], true); // 12.29899614287479 (population)
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sum
-
-Returns the sum of two or more numbers/arrays.
-
-Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`.
-
-```js
-const sum = (...arr) => [].concat(...arr).reduce((acc, val) => acc + val, 0);
-```
-
+### sum
+
+Returns the sum of two or more numbers/arrays.
+
+Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`.
+
+```js
+const sum = (...arr) => [].concat(...arr).reduce((acc, val) => acc + val, 0);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-sum([1, 2, 3, 4]); // 10
-```
+```js
+sum([1, 2, 3, 4]); // 10
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sumPower
-
-Returns the sum of the powers of all the numbers from `start` to `end` (both inclusive).
-
-Use `Array.fill()` to create an array of all the numbers in the target range, `Array.map()` and the exponent operator (`**`) to raise them to `power` and `Array.reduce()` to add them together.
-Omit the second argument, `power`, to use a default power of `2`.
-Omit the third argument, `start`, to use a default starting value of `1`.
-
-```js
-const sumPower = (end, power = 2, start = 1) =>
-  Array(end + 1 - start)
-    .fill(0)
-    .map((x, i) => (i + start) ** power)
-    .reduce((a, b) => a + b, 0);
-```
-
+### sumPower
+
+Returns the sum of the powers of all the numbers from `start` to `end` (both inclusive).
+
+Use `Array.fill()` to create an array of all the numbers in the target range, `Array.map()` and the exponent operator (`**`) to raise them to `power` and `Array.reduce()` to add them together.
+Omit the second argument, `power`, to use a default power of `2`.
+Omit the third argument, `start`, to use a default starting value of `1`.
+
+```js
+const sumPower = (end, power = 2, start = 1) =>
+  Array(end + 1 - start)
+    .fill(0)
+    .map((x, i) => (i + start) ** power)
+    .reduce((a, b) => a + b, 0);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-sumPower(10); // 385
-sumPower(10, 3); //3025
-sumPower(10, 3, 5); //2925
-```
+```js
+sumPower(10); // 385
+sumPower(10, 3); //3025
+sumPower(10, 3, 5); //2925
+```
 
 </details>
 
@@ -3651,87 +3651,87 @@ sumPower(10, 3, 5); //2925
 ---
  ## 📦 Node
 
-### hasFlags
-
-Check if the current process's arguments contain the specified flags.
-
-Use `Array.every()` and `Array.includes()` to check if `process.argv` contains all the specified flags.
-Use a regular expression to test if the specified flags are prefixed with `-` or `--` and prefix them accordingly.
-
-```js
-const hasFlags = (...flags) =>
-  flags.every(flag => process.argv.includes(/^-{1,2}/.test(flag) ? flag : '--' + flag));
-```
-
+### hasFlags
+
+Check if the current process's arguments contain the specified flags.
+
+Use `Array.every()` and `Array.includes()` to check if `process.argv` contains all the specified flags.
+Use a regular expression to test if the specified flags are prefixed with `-` or `--` and prefix them accordingly.
+
+```js
+const hasFlags = (...flags) =>
+  flags.every(flag => process.argv.includes(/^-{1,2}/.test(flag) ? flag : '--' + flag));
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-// node myScript.js -s --test --cool=true
-hasFlags('-s'); // true
-hasFlags('--test', 'cool=true', '-s'); // true
-hasFlags('special'); // false
-```
+```js
+// node myScript.js -s --test --cool=true
+hasFlags('-s'); // true
+hasFlags('--test', 'cool=true', '-s'); // true
+hasFlags('special'); // false
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isTravisCI
-
-Checks if the current environment is [Travis CI](https://travis-ci.org/).
-
-Checks if the current environment has the `TRAVIS` and `CI` environment variables ([reference](https://docs.travis-ci.com/user/environment-variables/#Default-Environment-Variables)).
-
-```js
-const isTravisCI = () => 'TRAVIS' in process.env && 'CI' in process.env;
-```
-
+### isTravisCI
+
+Checks if the current environment is [Travis CI](https://travis-ci.org/).
+
+Checks if the current environment has the `TRAVIS` and `CI` environment variables ([reference](https://docs.travis-ci.com/user/environment-variables/#Default-Environment-Variables)).
+
+```js
+const isTravisCI = () => 'TRAVIS' in process.env && 'CI' in process.env;
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isTravisCI(); // true (if code is running on Travis CI)
-```
+```js
+isTravisCI(); // true (if code is running on Travis CI)
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### JSONToFile
-
-Writes a JSON object to a file.
-
-Use `fs.writeFile()`, template literals and `JSON.stringify()` to write a `json` object to a `.json` file.
-
+### JSONToFile
+
+Writes a JSON object to a file.
+
+Use `fs.writeFile()`, template literals and `JSON.stringify()` to write a `json` object to a `.json` file.
+
 ```js
 const fs = require('fs');
 const JSONToFile = (obj, filename) =>
   fs.writeFile(`${filename}.json`, JSON.stringify(obj, null, 2));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 JSONToFile({ test: 'is passed' }, 'testJsonFile'); // writes the object to 'testJsonFile.json'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### readFileLines
-
-Returns an array of lines from the specified file.
-
-Use `readFileSync` function in `fs` node package to create a `Buffer` from a file.
-convert buffer to string using `toString(encoding)` function.
-creating an array from contents of file by `split`ing file content line by line (each `\n`).
-
+### readFileLines
+
+Returns an array of lines from the specified file.
+
+Use `readFileSync` function in `fs` node package to create a `Buffer` from a file.
+convert buffer to string using `toString(encoding)` function.
+creating an array from contents of file by `split`ing file content line by line (each `\n`).
+
 ```js
 const fs = require('fs');
 const readFileLines = filename =>
@@ -3739,71 +3739,71 @@ const readFileLines = filename =>
     .readFileSync(filename)
     .toString('UTF8')
     .split('\n');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
-/*
-contents of test.txt :
-  line1
-  line2
-  line3
-  ___________________________
+/*
+contents of test.txt :
+  line1
+  line2
+  line3
+  ___________________________
 */
 let arr = readFileLines('test.txt');
 console.log(arr); // ['line1', 'line2', 'line3']
-```
-
+```
+
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### untildify
-
-Converts a tilde path to an absolute path.
-
-Use `String.replace()` with a regular expression and `OS.homedir()` to replace the `~` in the start of the path with the home directory.
-
-```js
-const untildify = str => str.replace(/^~($|\/|\\)/, `${require('os').homedir()}$1`);
-```
-
+### untildify
+
+Converts a tilde path to an absolute path.
+
+Use `String.replace()` with a regular expression and `OS.homedir()` to replace the `~` in the start of the path with the home directory.
+
+```js
+const untildify = str => str.replace(/^~($|\/|\\)/, `${require('os').homedir()}$1`);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-untildify('~/node'); // '/Users/aUser/node'
-```
+```js
+untildify('~/node'); // '/Users/aUser/node'
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### UUIDGeneratorNode
-
-Generates a UUID in Node.JS.
-
-Use `crypto` API to generate a UUID, compliant with [RFC4122](https://www.ietf.org/rfc/rfc4122.txt) version 4.
-
+### UUIDGeneratorNode
+
+Generates a UUID in Node.JS.
+
+Use `crypto` API to generate a UUID, compliant with [RFC4122](https://www.ietf.org/rfc/rfc4122.txt) version 4.
+
 ```js
 const crypto = require('crypto');
 const UUIDGeneratorNode = () =>
   ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c =>
     (c ^ (crypto.randomBytes(1)[0] & (15 >> (c / 4)))).toString(16)
   );
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 UUIDGeneratorNode(); // '79c7c136-60ee-40a2-beb2-856f1feabefc'
-```
+```
 
 </details>
 
@@ -3812,13 +3812,13 @@ UUIDGeneratorNode(); // '79c7c136-60ee-40a2-beb2-856f1feabefc'
 ---
  ## 🗃️ Object
 
-### cleanObj
-
-Removes any properties except the ones specified from a JSON object.
-
-Use `Object.keys()` method to loop over given JSON object and deleting keys that are not `include`d in given array.
-Also if you give it a special key (`childIndicator`) it will search deeply inside it to apply function to inner objects too.
-
+### cleanObj
+
+Removes any properties except the ones specified from a JSON object.
+
+Use `Object.keys()` method to loop over given JSON object and deleting keys that are not `include`d in given array.
+Also if you give it a special key (`childIndicator`) it will search deeply inside it to apply function to inner objects too.
+
 ```js
 const cleanObj = (obj, keysToKeep = [], childIndicator) => {
   Object.keys(obj).forEach(key => {
@@ -3830,250 +3830,250 @@ const cleanObj = (obj, keysToKeep = [], childIndicator) => {
   });
   return obj;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const testObj = { a: 1, b: 2, children: { a: 1, b: 2 } };
 cleanObj(testObj, ['a'], 'children'); // { a: 1, children : { a: 1}}
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### invertKeyValues
-
-Inverts the key-value pairs of an object, without mutating it.
-
-Use `Object.keys()` and `Array.reduce()` to invert the key-value pairs of an object.
-
-```js
-const invertKeyValues = obj =>
-  Object.keys(obj).reduce((acc, key) => {
-    acc[obj[key]] = key;
-    return acc;
-  }, {});
-```
-
+### invertKeyValues
+
+Inverts the key-value pairs of an object, without mutating it.
+
+Use `Object.keys()` and `Array.reduce()` to invert the key-value pairs of an object.
+
+```js
+const invertKeyValues = obj =>
+  Object.keys(obj).reduce((acc, key) => {
+    acc[obj[key]] = key;
+    return acc;
+  }, {});
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-invertKeyValues({ name: 'John', age: 20 }); // { 20: 'age', John: 'name' }
-```
+```js
+invertKeyValues({ name: 'John', age: 20 }); // { 20: 'age', John: 'name' }
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### lowercaseKeys
-
-Creates a new object from the specified object, where all the keys are in lowercase.
-
-Use `Object.keys()` and `Array.reduce()` to create a new object from the specified object.
-Convert each key in the original object to lowercase, using `String.toLowerCase()`.
-
+### lowercaseKeys
+
+Creates a new object from the specified object, where all the keys are in lowercase.
+
+Use `Object.keys()` and `Array.reduce()` to create a new object from the specified object.
+Convert each key in the original object to lowercase, using `String.toLowerCase()`.
+
 ```js
 const lowercaseKeys = obj =>
   Object.keys(obj).reduce((acc, key) => {
     acc[key.toLowerCase()] = obj[key];
     return acc;
   }, {});
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const myObj = { Name: 'Adam', sUrnAME: 'Smith' };
 const myObjLower = lowercaseKeys(myObj); // {name: 'Adam', surname: 'Smith'};
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### objectFromPairs
-
-Creates an object from the given key-value pairs.
-
-Use `Array.reduce()` to create and combine key-value pairs.
-
+### objectFromPairs
+
+Creates an object from the given key-value pairs.
+
+Use `Array.reduce()` to create and combine key-value pairs.
+
 ```js
 const objectFromPairs = arr => arr.reduce((a, v) => ((a[v[0]] = v[1]), a), {});
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 objectFromPairs([['a', 1], ['b', 2]]); // {a: 1, b: 2}
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### objectToPairs
-
-Creates an array of key-value pair arrays from an object.
-
-Use `Object.keys()` and `Array.map()` to iterate over the object's keys and produce an array with key-value pairs.
-
+### objectToPairs
+
+Creates an array of key-value pair arrays from an object.
+
+Use `Object.keys()` and `Array.map()` to iterate over the object's keys and produce an array with key-value pairs.
+
 ```js
 const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 objectToPairs({ a: 1, b: 2 }); // [['a',1],['b',2]])
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### orderBy
-
-Returns a sorted array of objects ordered by properties and orders.
-
-Uses a custom implementation of sort, that reduces the props array argument with a default value of 0, it uses destructuring to swap the properties position depending on the order passed.
-If no orders array is passed it sort by 'asc' by default.
-
-```js
-const orderBy = (arr, props, orders) =>
-  [...arr].sort((a, b) =>
-    props.reduce((acc, prop, i) => {
-      if (acc === 0) {
-        const [p1, p2] = orders && orders[i] === 'desc' ? [b[prop], a[prop]] : [a[prop], b[prop]];
-        acc = p1 > p2 ? 1 : p1 < p2 ? -1 : 0;
-      }
-      return acc;
-    }, 0)
-  );
-```
-
+### orderBy
+
+Returns a sorted array of objects ordered by properties and orders.
+
+Uses a custom implementation of sort, that reduces the props array argument with a default value of 0, it uses destructuring to swap the properties position depending on the order passed.
+If no orders array is passed it sort by 'asc' by default.
+
+```js
+const orderBy = (arr, props, orders) =>
+  [...arr].sort((a, b) =>
+    props.reduce((acc, prop, i) => {
+      if (acc === 0) {
+        const [p1, p2] = orders && orders[i] === 'desc' ? [b[prop], a[prop]] : [a[prop], b[prop]];
+        acc = p1 > p2 ? 1 : p1 < p2 ? -1 : 0;
+      }
+      return acc;
+    }, 0)
+  );
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-const users = [{ name: 'fred', age: 48 }, { name: 'barney', age: 36 }, { name: 'fred', age: 40 }];
-orderBy(users, ['name', 'age'], ['asc', 'desc']); // [{name: 'barney', age: 36}, {name: 'fred', age: 48}, {name: 'fred', age: 40}]
-orderBy(users, ['name', 'age']); // [{name: 'barney', age: 36}, {name: 'fred', age: 40}, {name: 'fred', age: 48}]
-```
+```js
+const users = [{ name: 'fred', age: 48 }, { name: 'barney', age: 36 }, { name: 'fred', age: 40 }];
+orderBy(users, ['name', 'age'], ['asc', 'desc']); // [{name: 'barney', age: 36}, {name: 'fred', age: 48}, {name: 'fred', age: 40}]
+orderBy(users, ['name', 'age']); // [{name: 'barney', age: 36}, {name: 'fred', age: 40}, {name: 'fred', age: 48}]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### select
-
-Retrieve a property that indicated by the selector from an object.
-
-If the property does not exists returns `undefined`.
-
+### select
+
+Retrieve a property that indicated by the selector from an object.
+
+If the property does not exists returns `undefined`.
+
 ```js
 const select = (from, selector) =>
   selector.split('.').reduce((prev, cur) => prev && prev[cur], from);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const obj = { selector: { to: { val: 'val to select' } } };
 select(obj, 'selector.to.val'); // 'val to select'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### shallowClone
-
-Creates a shallow clone of an object.
-
-Use `Object.assign()` and an empty object (`{}`) to create a shallow clone of the original.
-
+### shallowClone
+
+Creates a shallow clone of an object.
+
+Use `Object.assign()` and an empty object (`{}`) to create a shallow clone of the original.
+
 ```js
 const shallowClone = obj => Object.assign({}, obj);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const a = { x: true, y: 1 };
 const b = shallowClone(a); // a !== b
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### size
-
-Get size of arrays, objects or strings.
-
-Get type of `value` (`array`, `object` or `string`). 
-Use `length` property for arrays. 
-Use `length` or `size` value if available or number of keys for objects. 
-Use `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) created from `value` for strings.
-
-Split strings into array of characters with `split('')` and return its length.
-
-```js
-const size = value =>
-  Array.isArray(value)
-    ? value.length
-    : value && typeof value === 'object'
-      ? value.size || value.length || Object.keys(value).length
-      : typeof value === 'string' ? new Blob([value]).size : 0;
-```
-
+### size
+
+Get size of arrays, objects or strings.
+
+Get type of `value` (`array`, `object` or `string`). 
+Use `length` property for arrays. 
+Use `length` or `size` value if available or number of keys for objects. 
+Use `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) created from `value` for strings.
+
+Split strings into array of characters with `split('')` and return its length.
+
+```js
+const size = value =>
+  Array.isArray(value)
+    ? value.length
+    : value && typeof value === 'object'
+      ? value.size || value.length || Object.keys(value).length
+      : typeof value === 'string' ? new Blob([value]).size : 0;
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-size([1, 2, 3, 4, 5]); // 5
-size('size'); // 4
-size({ one: 1, two: 2, three: 3 }); // 3
-```
+```js
+size([1, 2, 3, 4, 5]); // 5
+size('size'); // 4
+size({ one: 1, two: 2, three: 3 }); // 3
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### truthCheckCollection
-
-Checks if the predicate (second argument) is truthy on all elements of a collection (first argument).
-
-Use `Array.every()` to check if each passed object has the specified property and if it returns a truthy value.
-
+### truthCheckCollection
+
+Checks if the predicate (second argument) is truthy on all elements of a collection (first argument).
+
+Use `Array.every()` to check if each passed object has the specified property and if it returns a truthy value.
+
 ```js
 const truthCheckCollection = (collection, pre) => collection.every(obj => obj[pre]);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 truthCheckCollection([{ user: 'Tinky-Winky', sex: 'male' }, { user: 'Dipsy', sex: 'male' }], 'sex'); // true
-```
+```
 
 </details>
 
@@ -4082,141 +4082,141 @@ truthCheckCollection([{ user: 'Tinky-Winky', sex: 'male' }, { user: 'Dipsy', sex
 ---
  ## 📜 String
 
-### anagrams
-
-⚠️ **WARNING**: This function's execution time increases exponentially with each character. Anything more than 8 to 10 characters will cause your browser to hang as it tries to solve all the different combinations.
-
-Generates all anagrams of a string (contains duplicates).
-
-Use recursion.
-For each letter in the given string, create all the partial anagrams for the rest of its letters.
-Use `Array.map()` to combine the letter with each partial anagram, then `Array.reduce()` to combine all anagrams in one array.
-Base cases are for string `length` equal to `2` or `1`.
-
-```js
-const anagrams = str => {
-  if (str.length <= 2) return str.length === 2 ? [str, str[1] + str[0]] : [str];
-  return str
-    .split('')
-    .reduce(
-      (acc, letter, i) =>
-        acc.concat(anagrams(str.slice(0, i) + str.slice(i + 1)).map(val => letter + val)),
-      []
-    );
-};
-```
-
+### anagrams
+
+⚠️ **WARNING**: This function's execution time increases exponentially with each character. Anything more than 8 to 10 characters will cause your browser to hang as it tries to solve all the different combinations.
+
+Generates all anagrams of a string (contains duplicates).
+
+Use recursion.
+For each letter in the given string, create all the partial anagrams for the rest of its letters.
+Use `Array.map()` to combine the letter with each partial anagram, then `Array.reduce()` to combine all anagrams in one array.
+Base cases are for string `length` equal to `2` or `1`.
+
+```js
+const anagrams = str => {
+  if (str.length <= 2) return str.length === 2 ? [str, str[1] + str[0]] : [str];
+  return str
+    .split('')
+    .reduce(
+      (acc, letter, i) =>
+        acc.concat(anagrams(str.slice(0, i) + str.slice(i + 1)).map(val => letter + val)),
+      []
+    );
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-anagrams('abc'); // ['abc','acb','bac','bca','cab','cba']
-```
+```js
+anagrams('abc'); // ['abc','acb','bac','bca','cab','cba']
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### byteSize
-
-Returns the length of string.
-
-Convert a given string to a [`Blob` Object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) and find its `size`.
-
+### byteSize
+
+Returns the length of string.
+
+Convert a given string to a [`Blob` Object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) and find its `size`.
+
 ```js
 const byteSize = str => new Blob([str]).size;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 byteSize('😀'); // 4
 byteSize('Hello World'); // 11
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### capitalize
-
-Capitalizes the first letter of a string.
-
-Use destructuring and `toUpperCase()` to capitalize first letter, `...rest` to get array of characters after first letter and then `Array.join('')` to make it a string again.
-Omit the `lowerRest` parameter to keep the rest of the string intact, or set it to `true` to convert to lowercase.
-
-```js
-const capitalize = ([first, ...rest], lowerRest = false) =>
-  first.toUpperCase() + (lowerRest ? rest.join('').toLowerCase() : rest.join(''));
-```
-
+### capitalize
+
+Capitalizes the first letter of a string.
+
+Use destructuring and `toUpperCase()` to capitalize first letter, `...rest` to get array of characters after first letter and then `Array.join('')` to make it a string again.
+Omit the `lowerRest` parameter to keep the rest of the string intact, or set it to `true` to convert to lowercase.
+
+```js
+const capitalize = ([first, ...rest], lowerRest = false) =>
+  first.toUpperCase() + (lowerRest ? rest.join('').toLowerCase() : rest.join(''));
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-capitalize('fooBar'); // 'FooBar'
-capitalize('fooBar', true); // 'Foobar'
-```
+```js
+capitalize('fooBar'); // 'FooBar'
+capitalize('fooBar', true); // 'Foobar'
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### capitalizeEveryWord
-
-Capitalizes the first letter of every word in a string.
-
-Use `replace()` to match the first character of each word and `toUpperCase()` to capitalize it.
-
+### capitalizeEveryWord
+
+Capitalizes the first letter of every word in a string.
+
+Use `replace()` to match the first character of each word and `toUpperCase()` to capitalize it.
+
 ```js
 const capitalizeEveryWord = str => str.replace(/\b[a-z]/g, char => char.toUpperCase());
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 capitalizeEveryWord('hello world!'); // 'Hello World!'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### countVowels
-
-Retuns `number` of vowels in provided string.
-
-Use a regular expression to count the number of vowels `(A, E, I, O, U)` in a `string`.
-
+### countVowels
+
+Retuns `number` of vowels in provided string.
+
+Use a regular expression to count the number of vowels `(A, E, I, O, U)` in a `string`.
+
 ```js
 const countVowels = str => (str.match(/[aeiou]/gi) || []).length;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 countVowels('foobar'); // 3
 countVowels('gym'); // 0
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### escapeHTML
-
-Escapes a string for use in HTML.
-
-Use `String.replace()` with a regex that matches the characters that need to be escaped, using a callback function to replace each character instance with its associated escaped character using a dictionary (object).
-
+### escapeHTML
+
+Escapes a string for use in HTML.
+
+Use `String.replace()` with a regex that matches the characters that need to be escaped, using a callback function to replace each character instance with its associated escaped character using a dictionary (object).
+
 ```js
 const escapeHTML = str =>
   str.replace(
@@ -4230,57 +4230,57 @@ const escapeHTML = str =>
         '"': '&quot;'
       }[tag] || tag)
   );
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 escapeHTML('<a href="#">Me & you</a>'); // '&lt;a href=&quot;#&quot;&gt;Me &amp; you&lt;/a&gt;'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### escapeRegExp
-
-Escapes a string to use in a regular expression.
-
-Use `replace()` to escape special characters.
-
+### escapeRegExp
+
+Escapes a string to use in a regular expression.
+
+Use `replace()` to escape special characters.
+
 ```js
 const escapeRegExp = str => str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 escapeRegExp('(test)'); // \\(test\\)
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### fromCamelCase
-
-Converts a string from camelcase.
-
-Use `replace()` to remove underscores, hyphens, and spaces and convert words to camelcase.
-Omit the second argument to use a default separator of `_`.
-
+### fromCamelCase
+
+Converts a string from camelcase.
+
+Use `replace()` to remove underscores, hyphens, and spaces and convert words to camelcase.
+Omit the second argument to use a default separator of `_`.
+
 ```js
 const fromCamelCase = (str, separator = '_') =>
   str
     .replace(/([a-z\d])([A-Z])/g, '$1' + separator + '$2')
     .replace(/([A-Z]+)([A-Z][a-z\d]+)/g, '$1' + separator + '$2')
     .toLowerCase();
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -4288,72 +4288,72 @@ const fromCamelCase = (str, separator = '_') =>
 fromCamelCase('someDatabaseFieldName', ' '); // 'some database field name'
 fromCamelCase('someLabelThatNeedsToBeCamelized', '-'); // 'some-label-that-needs-to-be-camelized'
 fromCamelCase('someJavascriptProperty', '_'); // 'some_javascript_property'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isAbsoluteURL
-
-Returns `true` if the given string is an absolute URL, `false` otherwise.
-
-Use a regular expression to test if the string is an absolute URL.
-
-```js
-const isAbsoluteURL = str => /^[a-z][a-z0-9+.-]*:/.test(str);
-```
-
+### isAbsoluteURL
+
+Returns `true` if the given string is an absolute URL, `false` otherwise.
+
+Use a regular expression to test if the string is an absolute URL.
+
+```js
+const isAbsoluteURL = str => /^[a-z][a-z0-9+.-]*:/.test(str);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isAbsoluteURL('https://google.com'); // true
-isAbsoluteURL('ftp://www.myserver.net'); // true
-isAbsoluteURL('/foo/bar'); // false
-```
+```js
+isAbsoluteURL('https://google.com'); // true
+isAbsoluteURL('ftp://www.myserver.net'); // true
+isAbsoluteURL('/foo/bar'); // false
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### mask
-
-Replaces all but the last `num` of characters with the specified mask character.
-
-Use `String.slice()` to grab the portion of the characters that need to be masked and use `String.replace()` with a regex to replace every character with the mask character.
-Concatenate the masked characters with the remaining unmasked portion of the string.
-Omit the second argument, `num`, to keep a default of `4` characters unmasked. If `num` is negative, the unmasked characters will be at the start of the string.
-Omit the third argument, `mask`, to use a default character of `'*'` for the mask.
-
-```js
-const mask = (cc, num = 4, mask = '*') =>
-  ('' + cc).slice(0, -num).replace(/./g, mask) + ('' + cc).slice(-num);
-```
-
+### mask
+
+Replaces all but the last `num` of characters with the specified mask character.
+
+Use `String.slice()` to grab the portion of the characters that need to be masked and use `String.replace()` with a regex to replace every character with the mask character.
+Concatenate the masked characters with the remaining unmasked portion of the string.
+Omit the second argument, `num`, to keep a default of `4` characters unmasked. If `num` is negative, the unmasked characters will be at the start of the string.
+Omit the third argument, `mask`, to use a default character of `'*'` for the mask.
+
+```js
+const mask = (cc, num = 4, mask = '*') =>
+  ('' + cc).slice(0, -num).replace(/./g, mask) + ('' + cc).slice(-num);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-mask(1234567890); // '******7890'
-mask(1234567890, 3); // '*******890'
-mask(1234567890, -4, '$'); // '1234$$$$$$'
-```
+```js
+mask(1234567890); // '******7890'
+mask(1234567890, 3); // '*******890'
+mask(1234567890, -4, '$'); // '1234$$$$$$'
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### palindrome
-
-Returns `true` if the given string is a palindrome, `false` otherwise.
-
-Convert string `toLowerCase()` and use `replace()` to remove non-alphanumeric characters from it.
-Then, `split('')` into individual characters, `reverse()`, `join('')` and compare to the original, unreversed string, after converting it `tolowerCase()`.
-
+### palindrome
+
+Returns `true` if the given string is a palindrome, `false` otherwise.
+
+Convert string `toLowerCase()` and use `replace()` to remove non-alphanumeric characters from it.
+Then, `split('')` into individual characters, `reverse()`, `join('')` and compare to the original, unreversed string, after converting it `tolowerCase()`.
+
 ```js
 const palindrome = str => {
   const s = str.toLowerCase().replace(/[\W_]/g, '');
@@ -4365,164 +4365,164 @@ const palindrome = str => {
       .join('')
   );
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 palindrome('taco cat'); // true
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### pluralize
-
-Returns the singular or plural form of the word based on the input number. If the first argument is an `object`, it will use a closure by returning a function that can auto-pluralize words that don't simply end in `s` if the supplied dictionary contains the word.
-
-If `num` is either `-1` or `1`, return the singular form of the word. If `num` is any other number, return the plural form. Omit the third argument to use the default of the singular word + `s`, or supply a custom pluralized word when necessary. If the first argument is an `object`, utilize a closure by returning a function which can use the supplied dictionary to resolve the correct plural form of the word.
-
-```js
-const pluralize = (val, word, plural = word + 's') => {
-  const _pluralize = (num, word, plural = word + 's') =>
-    [1, -1].includes(Number(num)) ? word : plural;
-  if (typeof val === 'object') return (num, word) => _pluralize(num, word, val[word]);
-  return _pluralize(val, word, plural);
-};
-```
-
+### pluralize
+
+Returns the singular or plural form of the word based on the input number. If the first argument is an `object`, it will use a closure by returning a function that can auto-pluralize words that don't simply end in `s` if the supplied dictionary contains the word.
+
+If `num` is either `-1` or `1`, return the singular form of the word. If `num` is any other number, return the plural form. Omit the third argument to use the default of the singular word + `s`, or supply a custom pluralized word when necessary. If the first argument is an `object`, utilize a closure by returning a function which can use the supplied dictionary to resolve the correct plural form of the word.
+
+```js
+const pluralize = (val, word, plural = word + 's') => {
+  const _pluralize = (num, word, plural = word + 's') =>
+    [1, -1].includes(Number(num)) ? word : plural;
+  if (typeof val === 'object') return (num, word) => _pluralize(num, word, val[word]);
+  return _pluralize(val, word, plural);
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-pluralize(0, 'apple'); // 'apples'
-pluralize(1, 'apple'); // 'apple'
-pluralize(2, 'apple'); // 'apples'
-pluralize(2, 'person', 'people'); // 'people'
-
-const PLURALS = {
-  person: 'people',
-  radius: 'radii'
-};
-const autoPluralize = pluralize(PLURALS);
-autoPluralize(2, 'person'); // 'people'
-```
+```js
+pluralize(0, 'apple'); // 'apples'
+pluralize(1, 'apple'); // 'apple'
+pluralize(2, 'apple'); // 'apples'
+pluralize(2, 'person', 'people'); // 'people'
+
+const PLURALS = {
+  person: 'people',
+  radius: 'radii'
+};
+const autoPluralize = pluralize(PLURALS);
+autoPluralize(2, 'person'); // 'people'
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### repeatString
-
-Repeats a string n times using `String.repeat()`
-
-If no string is provided the default is `""` and the default number of times is 2.
-
+### repeatString
+
+Repeats a string n times using `String.repeat()`
+
+If no string is provided the default is `""` and the default number of times is 2.
+
 ```js
 const repeatString = (str = '', num = 2) => {
   return num >= 0 ? str.repeat(num) : str;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 repeatString('abc', 3); // 'abcabcabc'
 repeatString('abc'); // 'abcabc'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### reverseString
-
-Reverses a string.
-
-Use `split('')` and `Array.reverse()` to reverse the order of the characters in the string.
-Combine characters to get a string using `join('')`.
-
+### reverseString
+
+Reverses a string.
+
+Use `split('')` and `Array.reverse()` to reverse the order of the characters in the string.
+Combine characters to get a string using `join('')`.
+
 ```js
 const reverseString = str =>
   str
     .split('')
     .reverse()
     .join('');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 reverseString('foobar'); // 'raboof'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sortCharactersInString
-
-Alphabetically sorts the characters in a string.
-
-Split the string using `split('')`, `Array.sort()` utilizing `localeCompare()`, recombine using `join('')`.
-
+### sortCharactersInString
+
+Alphabetically sorts the characters in a string.
+
+Split the string using `split('')`, `Array.sort()` utilizing `localeCompare()`, recombine using `join('')`.
+
 ```js
 const sortCharactersInString = str =>
   str
     .split('')
     .sort((a, b) => a.localeCompare(b))
     .join('');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 sortCharactersInString('cabbage'); // 'aabbceg'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### splitLines
-
-Splits a multiline string into an array of lines.
-
-Use `String.split()` and a regular expression to match line breaks and create an array.
-
+### splitLines
+
+Splits a multiline string into an array of lines.
+
+Use `String.split()` and a regular expression to match line breaks and create an array.
+
 ```js
 const splitLines = str => str.split(/\r?\n/);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 splitLines('This\nis a\nmultiline\nstring.\n'); // ['This', 'is a', 'multiline', 'string' , '']
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### toCamelCase
-
-Converts a string to camelcase.
-
-Break the string into words and combine them capitalizing the first letter of each word.
-For more detailed explanation of this Regex, [visit this Site](https://regex101.com/r/bMCgAB/1).
-
+### toCamelCase
+
+Converts a string to camelcase.
+
+Break the string into words and combine them capitalizing the first letter of each word.
+For more detailed explanation of this Regex, [visit this Site](https://regex101.com/r/bMCgAB/1).
+
 ```js
 const toCamelCase = str => {
   let s =
@@ -4533,8 +4533,8 @@ const toCamelCase = str => {
       .join('');
   return s.slice(0, 1).toLowerCase() + s.slice(1);
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -4543,20 +4543,20 @@ toCamelCase('some_database_field_name'); // 'someDatabaseFieldName'
 toCamelCase('Some label that needs to be camelized'); // 'someLabelThatNeedsToBeCamelized'
 toCamelCase('some-javascript-property'); // 'someJavascriptProperty'
 toCamelCase('some-mixed_string with spaces_underscores-and-hyphens'); // 'someMixedStringWithSpacesUnderscoresAndHyphens'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### toKebabCase
-
-Converts a string to kebab case.
-
-Break the string into words and combine them using `-` as a separator.
-For more detailed explanation of this Regex, [visit this Site](https://regex101.com/r/bMCgAB/1).
-
+### toKebabCase
+
+Converts a string to kebab case.
+
+Break the string into words and combine them using `-` as a separator.
+For more detailed explanation of this Regex, [visit this Site](https://regex101.com/r/bMCgAB/1).
+
 ```js
 const toKebabCase = str =>
   str &&
@@ -4564,8 +4564,8 @@ const toKebabCase = str =>
     .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
     .map(x => x.toLowerCase())
     .join('-');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -4575,75 +4575,75 @@ toKebabCase('some text'); // 'some-text'
 toKebabCase('some-mixed_string With spaces_underscores-and-hyphens'); // 'some-mixed-string-with-spaces-underscores-and-hyphens'
 toKebabCase('AllThe-small Things'); // "all-the-small-things"
 toKebabCase('IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML'); // "i-am-listening-to-fm-while-loading-different-url-on-my-browser-and-also-editing-xml-and-html"
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### toSnakeCase
-
-Converts a string to snake case.
-
-Break the string into words and combine them using `_` as a separator.
-For more detailed explanation of this Regex, [visit this Site](https://regex101.com/r/bMCgAB/1).
-
-```js
-const toSnakeCase = str =>
-  str &&
-  str
-    .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
-    .map(x => x.toLowerCase())
-    .join('_');
-```
-
+### toSnakeCase
+
+Converts a string to snake case.
+
+Break the string into words and combine them using `_` as a separator.
+For more detailed explanation of this Regex, [visit this Site](https://regex101.com/r/bMCgAB/1).
+
+```js
+const toSnakeCase = str =>
+  str &&
+  str
+    .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
+    .map(x => x.toLowerCase())
+    .join('_');
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-toSnakeCase('camelCase'); // 'camel_case'
-toSnakeCase('some text'); // 'some_text'
-toSnakeCase('some-mixed_string With spaces_underscores-and-hyphens'); // 'some_mixed_string_with_spaces_underscores_and_hyphens'
-toSnakeCase('AllThe-small Things'); // "all_the_smal_things"
-toSnakeCase('IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML'); // "i_am_listening_to_fm_while_loading_different_url_on_my_browser_and_also_editing_some_xml_and_html"
-```
+```js
+toSnakeCase('camelCase'); // 'camel_case'
+toSnakeCase('some text'); // 'some_text'
+toSnakeCase('some-mixed_string With spaces_underscores-and-hyphens'); // 'some_mixed_string_with_spaces_underscores_and_hyphens'
+toSnakeCase('AllThe-small Things'); // "all_the_smal_things"
+toSnakeCase('IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML'); // "i_am_listening_to_fm_while_loading_different_url_on_my_browser_and_also_editing_some_xml_and_html"
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### truncateString
-
-Truncates a string up to a specified length.
-
-Determine if the string's `length` is greater than `num`.
-Return the string truncated to the desired length, with `...` appended to the end or the original string.
-
+### truncateString
+
+Truncates a string up to a specified length.
+
+Determine if the string's `length` is greater than `num`.
+Return the string truncated to the desired length, with `...` appended to the end or the original string.
+
 ```js
 const truncateString = (str, num) =>
   str.length > num ? str.slice(0, num > 3 ? num - 3 : num) + '...' : str;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 truncateString('boomerang', 7); // 'boom...'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### unescapeHTML
-
-Unescapes escaped HTML characters.
-
-Use `String.replace()` with a regex that matches the characters that need to be unescaped, using a callback function to replace each escaped character instance with its associated unescaped character using a dictionary (object).
-
+### unescapeHTML
+
+Unescapes escaped HTML characters.
+
+Use `String.replace()` with a regex that matches the characters that need to be unescaped, using a callback function to replace each escaped character instance with its associated unescaped character using a dictionary (object).
+
 ```js
 const unescapeHTML = str =>
   str.replace(
@@ -4657,38 +4657,38 @@ const unescapeHTML = str =>
         '&quot;': '"'
       }[tag] || tag)
   );
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 unescapeHTML('&lt;a href=&quot;#&quot;&gt;Me &amp; you&lt;/a&gt;'); // '<a href="#">Me & you</a>'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### words
-
-Converts a given string into an array of words.
-
-Use `String.split()` with a supplied pattern (defaults to non-alpha as a regex) to convert to an array of strings. Use `Array.filter()` to remove any empty strings.
-Omit the second argument to use the default regex.
-
+### words
+
+Converts a given string into an array of words.
+
+Use `String.split()` with a supplied pattern (defaults to non-alpha as a regex) to convert to an array of strings. Use `Array.filter()` to remove any empty strings.
+Omit the second argument to use the default regex.
+
 ```js
 const words = (str, pattern = /[^a-zA-Z-]+/) => str.split(pattern).filter(Boolean);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 words('I love javaScript!!'); // ["I", "love", "javaScript"]
 words('python, javaScript & coffee'); // ["python", "javaScript", "coffee"]
-```
+```
 
 </details>
 
@@ -4697,80 +4697,80 @@ words('python, javaScript & coffee'); // ["python", "javaScript", "coffee"]
 ---
  ## 🔧 Utility
 
-### cloneRegExp
-
-Clones a regular expression.
-
-Use `new RegExp()`, `RegExp.source` and `RegExp.flags` to clone the given regular expression.
-
-```js
-const cloneRegExp = regExp => new RegExp(regExp.source, regExp.flags);
-```
-
+### cloneRegExp
+
+Clones a regular expression.
+
+Use `new RegExp()`, `RegExp.source` and `RegExp.flags` to clone the given regular expression.
+
+```js
+const cloneRegExp = regExp => new RegExp(regExp.source, regExp.flags);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-const regExp = /lorem ipsum/gi;
-const regExp2 = cloneRegExp(regExp); // /lorem ipsum/gi
-```
+```js
+const regExp = /lorem ipsum/gi;
+const regExp2 = cloneRegExp(regExp); // /lorem ipsum/gi
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### coalesce
-
-Returns the first non-null/undefined argument.
-
-Use `Array.find()` to return the first non `null`/`undefined` argument.
-
+### coalesce
+
+Returns the first non-null/undefined argument.
+
+Use `Array.find()` to return the first non `null`/`undefined` argument.
+
 ```js
 const coalesce = (...args) => args.find(_ => ![undefined, null].includes(_));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 coalesce(null, undefined, '', NaN, 'Waldo'); // ""
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### coalesceFactory
-
-Returns a customized coalesce function that returns the first argument that returns `true` from the provided argument validation function.
-
-Use `Array.find()` to return the first argument that returns `true` from the provided argument validation function.
-
+### coalesceFactory
+
+Returns a customized coalesce function that returns the first argument that returns `true` from the provided argument validation function.
+
+Use `Array.find()` to return the first argument that returns `true` from the provided argument validation function.
+
 ```js
 const coalesceFactory = valid => (...args) => args.find(valid);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const customCoalesce = coalesceFactory(_ => ![null, undefined, '', NaN].includes(_));
 customCoalesce(undefined, null, NaN, '', 'Waldo'); // "Waldo"
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### extendHex
-
-Extends a 3-digit color code to a 6-digit color code.
-
-Use `Array.map()`, `split()` and `Array.join()` to join the mapped array for converting a 3-digit RGB notated hexadecimal color-code to the 6-digit form.
-`String.slice()` is used to remove `#` from string start since it's added once.
+### extendHex
+
+Extends a 3-digit color code to a 6-digit color code.
+
+Use `Array.map()`, `split()` and `Array.join()` to join the mapped array for converting a 3-digit RGB notated hexadecimal color-code to the 6-digit form.
+`String.slice()` is used to remove `#` from string start since it's added once.
 ```js
 const extendHex = shortHex =>
   '#' +
@@ -4779,76 +4779,76 @@ const extendHex = shortHex =>
     .split('')
     .map(x => x + x)
     .join('');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 extendHex('#03f'); // '#0033ff'
 extendHex('05a'); // '#0055aa'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### getType
-
-Returns the native type of a value.
-
-Returns lowercased constructor name of value, "undefined" or "null" if value is undefined or null
-
+### getType
+
+Returns the native type of a value.
+
+Returns lowercased constructor name of value, "undefined" or "null" if value is undefined or null
+
 ```js
 const getType = v =>
   v === undefined ? 'undefined' : v === null ? 'null' : v.constructor.name.toLowerCase();
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 getType(new Set([1, 2, 3])); // 'Set'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### getURLParameters
-
-Returns an object containing the parameters of the current URL.
-
-Use `match()` with an appropriate regular expression to get all key-value pairs, `Array.reduce()` to map and combine them into a single object.
-Pass `location.search` as the argument to apply to the current `url`.
-
+### getURLParameters
+
+Returns an object containing the parameters of the current URL.
+
+Use `match()` with an appropriate regular expression to get all key-value pairs, `Array.reduce()` to map and combine them into a single object.
+Pass `location.search` as the argument to apply to the current `url`.
+
 ```js
 const getURLParameters = url =>
   url
     .match(/([^?=&]+)(=([^&]*))/g)
     .reduce((a, v) => ((a[v.slice(0, v.indexOf('='))] = v.slice(v.indexOf('=') + 1)), a), {});
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 getURLParameters('http://url.com/page?name=Adam&surname=Smith'); // {name: 'Adam', surname: 'Smith'}
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### hexToRGB
-
-Converts a color code to a `rgb()` or `rgba()` string if alpha value is provided.
-
-Use bitwise right-shift operator and mask bits with `&` (and) operator to convert a hexadecimal color code (with or without prefixed with `#`) to a string with the RGB values. If it's 3-digit color code, first convert to 6-digit version. If an alpha value is provided alongside 6-digit hex, give `rgba()` string in return.
-
+### hexToRGB
+
+Converts a color code to a `rgb()` or `rgba()` string if alpha value is provided.
+
+Use bitwise right-shift operator and mask bits with `&` (and) operator to convert a hexadecimal color code (with or without prefixed with `#`) to a string with the RGB values. If it's 3-digit color code, first convert to 6-digit version. If an alpha value is provided alongside 6-digit hex, give `rgba()` string in return.
+
 ```js
 const hexToRGB = hex => {
   let alpha = false,
@@ -4869,8 +4869,8 @@ const hexToRGB = hex => {
     ')'
   );
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -4878,145 +4878,145 @@ const hexToRGB = hex => {
 hexToRGB('#27ae60ff'); // 'rgba(39, 174, 96, 255)'
 hexToRGB('27ae60'); // 'rgb(39, 174, 96)'
 hexToRGB('#fff'); // 'rgb(255, 255, 255)'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isArray
-
-Checks if the given argument is an array.
-
-Use `Array.isArray()` to check if a value is classified as an array.
-
+### isArray
+
+Checks if the given argument is an array.
+
+Use `Array.isArray()` to check if a value is classified as an array.
+
 ```js
 const isArray = val => !!val && Array.isArray(val);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 isArray(null); // false
 isArray([1]); // true
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isArrayLike
-
-Checks if the provided argument is array-like (i.e. is iterable).
-
-Use the spread operator (`...`) to check if the provided argument is iterable inside a `try... catch` block and the comma operator (`,`) to return the appropriate value.
-
-```js
-const isArrayLike = val => {
-  try {
-    return [...val], true;
-  } catch (e) {
-    return false;
-  }
-};
-```
-
+### isArrayLike
+
+Checks if the provided argument is array-like (i.e. is iterable).
+
+Use the spread operator (`...`) to check if the provided argument is iterable inside a `try... catch` block and the comma operator (`,`) to return the appropriate value.
+
+```js
+const isArrayLike = val => {
+  try {
+    return [...val], true;
+  } catch (e) {
+    return false;
+  }
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isArrayLike(document.querySelectorAll('.className')); // true
-isArrayLike('abc'); // true
-isArrayLike(null); // false
-```
+```js
+isArrayLike(document.querySelectorAll('.className')); // true
+isArrayLike('abc'); // true
+isArrayLike(null); // false
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isBoolean
-
-Checks if the given argument is a native boolean element.
-
-Use `typeof` to check if a value is classified as a boolean primitive.
-
+### isBoolean
+
+Checks if the given argument is a native boolean element.
+
+Use `typeof` to check if a value is classified as a boolean primitive.
+
 ```js
 const isBoolean = val => typeof val === 'boolean';
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 isBoolean(null); // false
 isBoolean(false); // true
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isFunction
-
-Checks if the given argument is a function.
-
-Use `typeof` to check if a value is classified as a function primitive.
-
-```js
-const isFunction = val => typeof val === 'function';
-```
-
+### isFunction
+
+Checks if the given argument is a function.
+
+Use `typeof` to check if a value is classified as a function primitive.
+
+```js
+const isFunction = val => typeof val === 'function';
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isFunction(null); // false
-isFunction('x'); // false
-isFunction(x => x); // true
-```
+```js
+isFunction(null); // false
+isFunction('x'); // false
+isFunction(x => x); // true
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isNull
-
-Returns `true` if the specified value is `null`, `false` otherwise.
-
-Use the strict equality operator to check if the value and of `val` are equal to `null`.
-
-```js
-const isNull = val => val === null;
-```
-
+### isNull
+
+Returns `true` if the specified value is `null`, `false` otherwise.
+
+Use the strict equality operator to check if the value and of `val` are equal to `null`.
+
+```js
+const isNull = val => val === null;
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isNull(null); // true
-```
+```js
+isNull(null); // true
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isNumber
-
-Checks if the given argument is a number.
-
-Use `typeof` to check if a value is classified as a number primitive.
-
+### isNumber
+
+Checks if the given argument is a number.
+
+Use `typeof` to check if a value is classified as a number primitive.
+
 ```js
 const isNumber = val => typeof val === 'number';
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -5030,228 +5030,228 @@ isNumber(1); // true
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isPrimitive
-
-Returns a boolean determining if the supplied value is primitive or not.
-
-Use `Array.includes()` on an array of type strings which are not primitive,
-supplying the type using `typeof`.
-Since `typeof null` evaluates to `'object'`, it needs to be directly compared.
-
-```js
-const isPrimitive = val => !['object', 'function'].includes(typeof val) || val === null;
-```
-
+### isPrimitive
+
+Returns a boolean determining if the supplied value is primitive or not.
+
+Use `Array.includes()` on an array of type strings which are not primitive,
+supplying the type using `typeof`.
+Since `typeof null` evaluates to `'object'`, it needs to be directly compared.
+
+```js
+const isPrimitive = val => !['object', 'function'].includes(typeof val) || val === null;
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isPrimitive(null); // true
-isPrimitive(50); // true
-isPrimitive('Hello!'); // true
-isPrimitive(false); // true
-isPrimitive(Symbol()); // true
-isPrimitive([]); // false
-```
+```js
+isPrimitive(null); // true
+isPrimitive(50); // true
+isPrimitive('Hello!'); // true
+isPrimitive(false); // true
+isPrimitive(Symbol()); // true
+isPrimitive([]); // false
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isPromiseLike
-
-Returns `true` if an object looks like a [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise), `false` otherwise.
-
-Check if the object is not `null`, its `typeof` matches either `object` or `function` and if it has a `.then` property, which is also a `function`.
-
-```js
-const isPromiseLike = obj =>
-  obj !== null &&
-  (typeof obj === 'object' || typeof obj === 'function') &&
-  typeof obj.then === 'function';
-```
-
+### isPromiseLike
+
+Returns `true` if an object looks like a [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise), `false` otherwise.
+
+Check if the object is not `null`, its `typeof` matches either `object` or `function` and if it has a `.then` property, which is also a `function`.
+
+```js
+const isPromiseLike = obj =>
+  obj !== null &&
+  (typeof obj === 'object' || typeof obj === 'function') &&
+  typeof obj.then === 'function';
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isPromiseLike({
-  then: function() {
-    return '';
-  }
-}); // true
-isPromiseLike(null); // false
-isPromiseLike({}); // false
-```
+```js
+isPromiseLike({
+  then: function() {
+    return '';
+  }
+}); // true
+isPromiseLike(null); // false
+isPromiseLike({}); // false
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isString
-
-Checks if the given argument is a string.
-
-Use `typeof` to check if a value is classified as a string primitive.
-
+### isString
+
+Checks if the given argument is a string.
+
+Use `typeof` to check if a value is classified as a string primitive.
+
 ```js
 const isString = val => typeof val === 'string';
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 isString('10'); // true
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isSymbol
-
-Checks if the given argument is a symbol.
-
-Use `typeof` to check if a value is classified as a symbol primitive.
-
+### isSymbol
+
+Checks if the given argument is a symbol.
+
+Use `typeof` to check if a value is classified as a symbol primitive.
+
 ```js
 const isSymbol = val => typeof val === 'symbol';
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 isSymbol(Symbol('x')); // true
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isValidJSON
-
-Checks if the provided argument is a valid JSON.
-
-Use `JSON.parse()` and a `try... catch` block to check if the provided argument is a valid JSON.
-
-```js
-const isValidJSON = obj => {
-  try {
-    JSON.parse(obj);
-    return true;
-  } catch (e) {
-    return false;
-  }
-};
-```
-
+### isValidJSON
+
+Checks if the provided argument is a valid JSON.
+
+Use `JSON.parse()` and a `try... catch` block to check if the provided argument is a valid JSON.
+
+```js
+const isValidJSON = obj => {
+  try {
+    JSON.parse(obj);
+    return true;
+  } catch (e) {
+    return false;
+  }
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isValidJSON('{"name":"Adam","age":20}'); // true
-isValidJSON('{"name":"Adam",age:"20"}'); // false
-isValidJSON(null); // true
-```
+```js
+isValidJSON('{"name":"Adam","age":20}'); // true
+isValidJSON('{"name":"Adam",age:"20"}'); // false
+isValidJSON(null); // true
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### prettyBytes
-
-Converts a number in bytes to a human-readable string.
-
-Use an array dictionary of units to be accessed based on the exponent.
-Use `Number.toPrecision()` to truncate the number to a certain number of digits.
-Return the prettified string by building it up, taking into account the supplied options and whether it is negative or not.
-Omit the second argument, `precision`, to use a default precision of `3` digits.
-Omit the third argument, `addSpace`, to add space between the number and unit by default.
-
-```js
-const prettyBytes = (num, precision = 3, addSpace = true) => {
-  const UNITS = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
-  if (Math.abs(num) < 1) return num + (addSpace ? ' ' : '') + UNITS[0];
-  const exponent = Math.min(Math.floor(Math.log10(num < 0 ? -num : num) / 3), UNITS.length - 1);
-  const n = Number(((num < 0 ? -num : num) / 1000 ** exponent).toPrecision(precision));
-  return (num < 0 ? '-' : '') + n + (addSpace ? ' ' : '') + UNITS[exponent];
-};
-```
-
+### prettyBytes
+
+Converts a number in bytes to a human-readable string.
+
+Use an array dictionary of units to be accessed based on the exponent.
+Use `Number.toPrecision()` to truncate the number to a certain number of digits.
+Return the prettified string by building it up, taking into account the supplied options and whether it is negative or not.
+Omit the second argument, `precision`, to use a default precision of `3` digits.
+Omit the third argument, `addSpace`, to add space between the number and unit by default.
+
+```js
+const prettyBytes = (num, precision = 3, addSpace = true) => {
+  const UNITS = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
+  if (Math.abs(num) < 1) return num + (addSpace ? ' ' : '') + UNITS[0];
+  const exponent = Math.min(Math.floor(Math.log10(num < 0 ? -num : num) / 3), UNITS.length - 1);
+  const n = Number(((num < 0 ? -num : num) / 1000 ** exponent).toPrecision(precision));
+  return (num < 0 ? '-' : '') + n + (addSpace ? ' ' : '') + UNITS[exponent];
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-prettyBytes(1000); // 1 KB
-prettyBytes(-27145424323.5821, 5); // -27.145 GB
-prettyBytes(123456789, 3, false); // 123MB
-```
+```js
+prettyBytes(1000); // 1 KB
+prettyBytes(-27145424323.5821, 5); // -27.145 GB
+prettyBytes(123456789, 3, false); // 123MB
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### randomHexColorCode
-
-Generates a random hexadecimal color code.
-
-Use `Math.random` to generate a random 24-bit(6x4bits) hexadecimal number. Use bit shifting and then convert it to an hexadecimal String using `toString(16)`.
-
+### randomHexColorCode
+
+Generates a random hexadecimal color code.
+
+Use `Math.random` to generate a random 24-bit(6x4bits) hexadecimal number. Use bit shifting and then convert it to an hexadecimal String using `toString(16)`.
+
 ```js
 const randomHexColorCode = () => {
   let n = ((Math.random() * 0xfffff) | 0).toString(16);
   return '#' + (n.length !== 6 ? ((Math.random() * 0xf) | 0).toString(16) + n : n);
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 randomHexColorCode(); // "#e34155"
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### RGBToHex
-
-Converts the values of RGB components to a color code.
-
-Convert given RGB parameters to hexadecimal string using bitwise left-shift operator (`<<`) and `toString(16)`, then `padStart(6,'0')` to get a 6-digit hexadecimal value.
-
+### RGBToHex
+
+Converts the values of RGB components to a color code.
+
+Convert given RGB parameters to hexadecimal string using bitwise left-shift operator (`<<`) and `toString(16)`, then `padStart(6,'0')` to get a 6-digit hexadecimal value.
+
 ```js
 const RGBToHex = (r, g, b) => ((r << 16) + (g << 8) + b).toString(16).padStart(6, '0');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 RGBToHex(255, 165, 1); // 'ffa501'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sbdm
-
-This algorithm is a simple hash-algorithm that hashes it input string `s` into a whole number.
-
-Use `split('')` and `Array.reduce()` to create a hash of the input string, utilizing bit shifting.
-
+### sbdm
+
+This algorithm is a simple hash-algorithm that hashes it input string `s` into a whole number.
+
+Use `split('')` and `Array.reduce()` to create a hash of the input string, utilizing bit shifting.
+
 ```js
 const sdbm = str => {
   let arr = str.split('');
@@ -5261,26 +5261,26 @@ const sdbm = str => {
     0
   );
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 console.log(sdbm('name')); // -3521204949
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### timeTaken
-
-Measures the time taken by a function to execute.
-
-Use `console.time()` and `console.timeEnd()` to measure the difference between the start and end times to determine how long the callback took to execute.
-
+### timeTaken
+
+Measures the time taken by a function to execute.
+
+Use `console.time()` and `console.timeEnd()` to measure the difference between the start and end times to determine how long the callback took to execute.
+
 ```js
 const timeTaken = callback => {
   console.time('timeTaken');
@@ -5288,48 +5288,48 @@ const timeTaken = callback => {
   console.timeEnd('timeTaken');
   return r;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 timeTaken(() => Math.pow(2, 10)); // 1024, (logged): timeTaken: 0.02099609375ms
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### toDecimalMark
-
-Use `toLocaleString()` to convert a float-point arithmetic to the [Decimal mark](https://en.wikipedia.org/wiki/Decimal_mark) form. It makes a comma separated string from a number.
-
+### toDecimalMark
+
+Use `toLocaleString()` to convert a float-point arithmetic to the [Decimal mark](https://en.wikipedia.org/wiki/Decimal_mark) form. It makes a comma separated string from a number.
+
  ```js
 const toDecimalMark = num => num.toLocaleString('en-US');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 toDecimalMark(12305030388.9087); // "12,305,030,388.9087"
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### toOrdinalSuffix
-
-Adds an ordinal suffix to a number.
-
-Use the modulo operator (`%`) to find values of single and tens digits.
-Find which ordinal pattern digits match.
-If digit is found in teens pattern, use teens ordinal.
-
+### toOrdinalSuffix
+
+Adds an ordinal suffix to a number.
+
+Use the modulo operator (`%`) to find values of single and tens digits.
+Find which ordinal pattern digits match.
+If digit is found in teens pattern, use teens ordinal.
+
 ```js
 const toOrdinalSuffix = num => {
   const int = parseInt(num),
@@ -5341,79 +5341,79 @@ const toOrdinalSuffix = num => {
     ? int + ordinals[digits[0] - 1]
     : int + ordinals[3];
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 toOrdinalSuffix('123'); // "123rd"
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### validateNumber
-
-Returns `true` if the given value is a number, `false` otherwise.
-
-Use `!isNaN` in combination with `parseFloat()` to check if the argument is a number.
-Use `isFinite()` to check if the number is finite.
-Use `Number()` to check if the coercion holds.
-
+### validateNumber
+
+Returns `true` if the given value is a number, `false` otherwise.
+
+Use `!isNaN` in combination with `parseFloat()` to check if the argument is a number.
+Use `isFinite()` to check if the number is finite.
+Use `Number()` to check if the coercion holds.
+
 ```js
 const validateNumber = n => !isNaN(parseFloat(n)) && isFinite(n) && Number(n) == n;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 validateNumber('10'); // true
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### yesNo
-
-Returns `true` if the string is `y`/`yes` or `false` if the string is `n`/`no`.
-
-Use `RegExp.test()` to check if the string evaluates to `y/yes` or `n/no`.
-Omit the second argument, `def` to set the default answer as `no`.
-
-```js
-const yesNo = (val, def = false) =>
-  /^(y|yes)$/i.test(val) ? true : /^(n|no)$/i.test(val) ? false : def;
-```
-
+### yesNo
+
+Returns `true` if the string is `y`/`yes` or `false` if the string is `n`/`no`.
+
+Use `RegExp.test()` to check if the string evaluates to `y/yes` or `n/no`.
+Omit the second argument, `def` to set the default answer as `no`.
+
+```js
+const yesNo = (val, def = false) =>
+  /^(y|yes)$/i.test(val) ? true : /^(n|no)$/i.test(val) ? false : def;
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-yesNo('Y'); // true
-yesNo('yes'); // true
-yesNo('No'); // false
-yesNo('Foo', true); // true
-```
+```js
+yesNo('Y'); // true
+yesNo('yes'); // true
+yesNo('No'); // false
+yesNo('Foo', true); // true
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-## Collaborators
-
-| [<img src="https://github.com/Chalarangelo.png" width="100px;"/>](https://github.com/Chalarangelo)<br/> [<sub>Angelos Chalaris</sub>](https://github.com/Chalarangelo) | [<img src="https://github.com/Pl4gue.png" width="100px;"/>](https://github.com/Pl4gue)<br/> [<sub>David Wu</sub>](https://github.com/Pl4gue) | [<img src="https://github.com/fejes713.png" width="100px;"/>](https://github.com/fejes713)<br/> [<sub>Stefan Feješ</sub>](https://github.com/fejes713)  | [<img src="https://github.com/kingdavidmartins.png" width="100px;"/>](https://github.com/kingdavidmartins)<br/> [<sub>King David Martins</sub>](https://github.com/iamsoorena) | [<img src="https://github.com/iamsoorena.png" width="100px;"/>](https://github.com/iamsoorena)<br/> [<sub>Soorena Soleimani</sub>](https://github.com/iamsoorena) |
-| --- | --- | --- | --- | --- |
-| [<img src="https://github.com/elderhsouza.png" width="100px;"/>](https://github.com/elderhsouza)<br/> [<sub>Elder Henrique Souza</sub>](https://github.com/elderhsouza) | [<img src="https://github.com/skatcat31.png" width="100px;"/>](https://github.com/skatcat31)<br/> [<sub>Robert Mennell</sub>](https://github.com/skatcat31) | [<img src="https://github.com/atomiks.png" width="100px;"/>](https://github.com/atomiks)<br/> [<sub>atomiks</sub>](https://github.com/atomiks)  |
-
-
-## Credits
-
-*Icons made by [Smashicons](https://www.flaticon.com/authors/smashicons) from [www.flaticon.com](https://www.flaticon.com/) is licensed by [CC 3.0 BY](http://creativecommons.org/licenses/by/3.0/).*
+## Collaborators
+
+| [<img src="https://github.com/Chalarangelo.png" width="100px;"/>](https://github.com/Chalarangelo)<br/> [<sub>Angelos Chalaris</sub>](https://github.com/Chalarangelo) | [<img src="https://github.com/Pl4gue.png" width="100px;"/>](https://github.com/Pl4gue)<br/> [<sub>David Wu</sub>](https://github.com/Pl4gue) | [<img src="https://github.com/fejes713.png" width="100px;"/>](https://github.com/fejes713)<br/> [<sub>Stefan Feješ</sub>](https://github.com/fejes713)  | [<img src="https://github.com/kingdavidmartins.png" width="100px;"/>](https://github.com/kingdavidmartins)<br/> [<sub>King David Martins</sub>](https://github.com/iamsoorena) | [<img src="https://github.com/iamsoorena.png" width="100px;"/>](https://github.com/iamsoorena)<br/> [<sub>Soorena Soleimani</sub>](https://github.com/iamsoorena) |
+| --- | --- | --- | --- | --- |
+| [<img src="https://github.com/elderhsouza.png" width="100px;"/>](https://github.com/elderhsouza)<br/> [<sub>Elder Henrique Souza</sub>](https://github.com/elderhsouza) | [<img src="https://github.com/skatcat31.png" width="100px;"/>](https://github.com/skatcat31)<br/> [<sub>Robert Mennell</sub>](https://github.com/skatcat31) | [<img src="https://github.com/atomiks.png" width="100px;"/>](https://github.com/atomiks)<br/> [<sub>atomiks</sub>](https://github.com/atomiks)  |
+
+
+## Credits
+
+*Icons made by [Smashicons](https://www.flaticon.com/authors/smashicons) from [www.flaticon.com](https://www.flaticon.com/) is licensed by [CC 3.0 BY](http://creativecommons.org/licenses/by/3.0/).*
 
diff --git a/snippets/RGBToHex.md b/snippets/RGBToHex.md
index 1a566c82a..4b3f6b35f 100644
--- a/snippets/RGBToHex.md
+++ b/snippets/RGBToHex.md
@@ -2,7 +2,7 @@
 
 Converts the values of RGB components to a color code.
 
-Convert given RGB parameters to hexadecimal string using bitwise left-shift operator (`<<`) and `toString(16)`, then `padStart(6,'0')` to get a 6-digit hexadecimal value.
+Convert given RGB parameters to hexadecimal string using bitwise left-shift operator (`<<`) and `toString(16)`, then `String.padStart(6,'0')` to get a 6-digit hexadecimal value.
 
 ```js
 const RGBToHex = (r, g, b) => ((r << 16) + (g << 8) + b).toString(16).padStart(6, '0');
diff --git a/snippets/average.md b/snippets/average.md
index 6eccc0636..fff5dd5a6 100644
--- a/snippets/average.md
+++ b/snippets/average.md
@@ -1,17 +1,14 @@
 ### average
 
-Returns the average of an of two or more numbers/arrays.
+Returns the average of an of two or more numbers.
 
 Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`, divide by the `length` of the array.
 
 ```js
-const average = (...arr) => {
-  const nums = [].concat(...arr);
-  return nums.reduce((acc, val) => acc + val, 0) / nums.length;
-};
+const average = (...nums) => [...nums].reduce((acc, val) => acc + val, 0) / nums.length;
 ```
 
 ```js
-average([1, 2, 3]); // 2
+average(...[1, 2, 3]); // 2
 average(1, 2, 3); // 2
 ```
diff --git a/snippets/byteSize.md b/snippets/byteSize.md
index 5693da1ab..459ee3796 100644
--- a/snippets/byteSize.md
+++ b/snippets/byteSize.md
@@ -1,6 +1,6 @@
 ### byteSize
 
-Returns the length of string.
+Returns the length of a string in bytes.
 
 Convert a given string to a [`Blob` Object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) and find its `size`.
 
diff --git a/snippets/capitalize.md b/snippets/capitalize.md
index f9a26e7be..c56616e51 100644
--- a/snippets/capitalize.md
+++ b/snippets/capitalize.md
@@ -2,7 +2,7 @@
 
 Capitalizes the first letter of a string.
 
-Use destructuring and `toUpperCase()` to capitalize first letter, `...rest` to get array of characters after first letter and then `Array.join('')` to make it a string again.
+Use array destructuring and `String.toUpperCase()` to capitalize first letter, `...rest` to get array of characters after first letter and then `Array.join('')` to make it a string again.
 Omit the `lowerRest` parameter to keep the rest of the string intact, or set it to `true` to convert to lowercase.
 
 ```js
diff --git a/snippets/capitalizeEveryWord.md b/snippets/capitalizeEveryWord.md
index d02d2296f..845553aa3 100644
--- a/snippets/capitalizeEveryWord.md
+++ b/snippets/capitalizeEveryWord.md
@@ -2,7 +2,7 @@
 
 Capitalizes the first letter of every word in a string.
 
-Use `replace()` to match the first character of each word and `toUpperCase()` to capitalize it.
+Use `String.replace()` to match the first character of each word and `String.toUpperCase()` to capitalize it.
 
 ```js
 const capitalizeEveryWord = str => str.replace(/\b[a-z]/g, char => char.toUpperCase());
diff --git a/snippets/cleanObj.md b/snippets/cleanObj.md
index b53a42806..e068deb10 100644
--- a/snippets/cleanObj.md
+++ b/snippets/cleanObj.md
@@ -2,8 +2,8 @@
 
 Removes any properties except the ones specified from a JSON object.
 
-Use `Object.keys()` method to loop over given JSON object and deleting keys that are not `include`d in given array.
-Also if you give it a special key (`childIndicator`) it will search deeply inside it to apply function to inner objects too.
+Use `Object.keys()` method to loop over given JSON object and deleting keys that are not included in given array.
+If you pass a special key,`childIndicator`, it will search deeply apply the function to inner objects, too.
 
 ```js
 const cleanObj = (obj, keysToKeep = [], childIndicator) => {
diff --git a/snippets/countOccurrences.md b/snippets/countOccurrences.md
index 927631f6f..b6e0d2aad 100644
--- a/snippets/countOccurrences.md
+++ b/snippets/countOccurrences.md
@@ -5,7 +5,7 @@ Counts the occurrences of a value in an array.
 Use `Array.reduce()` to increment a counter each time you encounter the specific value inside the array.
 
 ```js
-const countOccurrences = (arr, value) => arr.reduce((a, v) => (v === value ? a + 1 : a + 0), 0);
+const countOccurrences = (arr, val) => arr.reduce((a, v) => (v === val ? a + 1 : a + 0), 0);
 ```
 
 ```js
diff --git a/snippets/elo.md b/snippets/elo.md
index e08171878..622cdc981 100644
--- a/snippets/elo.md
+++ b/snippets/elo.md
@@ -4,8 +4,10 @@ Computes the new ratings between two or more opponents using the [Elo rating sys
 of pre-ratings and returns an array containing post-ratings.
 The array should be ordered from best performer to worst performer (winner -> loser).
 
-Use the exponent `**` operator and math operators to compute the expected score (chance of winning)
-of each opponent and compute the new rating for each. Loop through the ratings, using each permutation to compute the post-Elo rating for each player in a pairwise fashion. Omit the second argument to use the default K-factor of 32, or supply a custom K-factor value. For details on the third argument, see the last example.
+Use the exponent `**` operator and math operators to compute the expected score (chance of winning).
+of each opponent and compute the new rating for each.
+Loop through the ratings, using each permutation to compute the post-Elo rating for each player in a pairwise fashion. 
+Omit the second argument to use the default `kFactor` of 32.
 
 ```js
 const elo = ([...ratings], kFactor = 32, selfRating) => {
@@ -35,7 +37,7 @@ elo([1200, 1200], 64); // [1232, 1168]
 // 4 player FFA, all same rank
 elo([1200, 1200, 1200, 1200]).map(Math.round); // [1246, 1215, 1185, 1154]
 /*
-For teams, each rating can adjusted based on own team's average rating vs. 
+For teams, each rating can adjusted based on own team's average rating vs.
 average rating of opposing team, with the score being added to their
 own individual rating by supplying it as the third argument.
 */
diff --git a/snippets/escapeHTML.md b/snippets/escapeHTML.md
index 2db4cf0c0..85c772621 100644
--- a/snippets/escapeHTML.md
+++ b/snippets/escapeHTML.md
@@ -2,7 +2,7 @@
 
 Escapes a string for use in HTML.
 
-Use `String.replace()` with a regex that matches the characters that need to be escaped, using a callback function to replace each character instance with its associated escaped character using a dictionary (object).
+Use `String.replace()` with a regexp that matches the characters that need to be escaped, using a callback function to replace each character instance with its associated escaped character using a dictionary (object).
 
 ```js
 const escapeHTML = str =>
diff --git a/snippets/escapeRegExp.md b/snippets/escapeRegExp.md
index e83e13667..52a6aa3a2 100644
--- a/snippets/escapeRegExp.md
+++ b/snippets/escapeRegExp.md
@@ -2,7 +2,7 @@
 
 Escapes a string to use in a regular expression.
 
-Use `replace()` to escape special characters.
+Use `String.replace()` to escape special characters.
 
 ```js
 const escapeRegExp = str => str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
diff --git a/snippets/extendHex.md b/snippets/extendHex.md
index 39ca049fe..57231ee07 100644
--- a/snippets/extendHex.md
+++ b/snippets/extendHex.md
@@ -2,8 +2,9 @@
 
 Extends a 3-digit color code to a 6-digit color code.
 
-Use `Array.map()`, `split()` and `Array.join()` to join the mapped array for converting a 3-digit RGB notated hexadecimal color-code to the 6-digit form.
-`String.slice()` is used to remove `#` from string start since it's added once.
+Use `Array.map()`, `String.split()` and `Array.join()` to join the mapped array for converting a 3-digit RGB notated hexadecimal color-code to the 6-digit form.
+`Array.slice()` is used to remove `#` from string start since it's added once.
+
 ```js
 const extendHex = shortHex =>
   '#' +
diff --git a/snippets/flatten.md b/snippets/flatten.md
index dd90ca3be..a31bbe2d0 100644
--- a/snippets/flatten.md
+++ b/snippets/flatten.md
@@ -2,7 +2,7 @@
 
 Flattens an array.
 
-Use a new array and concatenate it with the spread input array causing a shallow denesting of any contained arrays.
+Use a new array, `Array.concat()` and the spread operator (`...`) to cause a shallow denesting of any contained arrays.
 
 ```js
 const flatten = arr => [].concat(...arr);
diff --git a/snippets/flip.md b/snippets/flip.md
index 3ab12dd78..bcc66e500 100644
--- a/snippets/flip.md
+++ b/snippets/flip.md
@@ -1,6 +1,6 @@
 ### flip
 
-Flip takes a function as an argument, then makes the first argument the last
+Flip takes a function as an argument, then makes the first argument the last.
 
 Return a closure that takes variadic inputs, and splices the last argument to make it the first argument before applying the rest.
 
diff --git a/snippets/fromCamelCase.md b/snippets/fromCamelCase.md
index d67b37d4a..503fcdeeb 100644
--- a/snippets/fromCamelCase.md
+++ b/snippets/fromCamelCase.md
@@ -2,8 +2,8 @@
 
 Converts a string from camelcase.
 
-Use `replace()` to remove underscores, hyphens, and spaces and convert words to camelcase.
-Omit the second argument to use a default separator of `_`.
+Use `String.replace()` to remove underscores, hyphens, and spaces and convert words to camelcase.
+Omit the second argument to use a default `separator` of `_`.
 
 ```js
 const fromCamelCase = (str, separator = '_') =>
diff --git a/snippets/gcd.md b/snippets/gcd.md
index 39ab41b6e..c1406bb62 100644
--- a/snippets/gcd.md
+++ b/snippets/gcd.md
@@ -9,10 +9,11 @@ Otherwise, return the GCD of `y` and the remainder of the division `x/y`.
 ```js
 const gcd = (...arr) => {
   const _gcd = (x, y) => (!y ? x : gcd(y, x % y));
-  return [].concat(...arr).reduce((a, b) => _gcd(a, b));
+  return [...arr].reduce((a, b) => _gcd(a, b));
 };
 ```
 
 ```js
 gcd(8, 36); // 4
+gcd(...[12,8,32]); // 4
 ```
diff --git a/snippets/getType.md b/snippets/getType.md
index 612c248fa..ae3d9268a 100644
--- a/snippets/getType.md
+++ b/snippets/getType.md
@@ -2,7 +2,7 @@
 
 Returns the native type of a value.
 
-Returns lowercased constructor name of value, "undefined" or "null" if value is undefined or null
+Returns lowercased constructor name of value, `"undefined"` or `"null"` if value is `undefined` or `null`.
 
 ```js
 const getType = v =>
diff --git a/snippets/getURLParameters.md b/snippets/getURLParameters.md
index 69138e57f..cf601b0f5 100644
--- a/snippets/getURLParameters.md
+++ b/snippets/getURLParameters.md
@@ -2,7 +2,7 @@
 
 Returns an object containing the parameters of the current URL.
 
-Use `match()` with an appropriate regular expression to get all key-value pairs, `Array.reduce()` to map and combine them into a single object.
+Use `String.match()` with an appropriate regular expression to get all key-value pairs, `Array.reduce()` to map and combine them into a single object.
 Pass `location.search` as the argument to apply to the current `url`.
 
 ```js
diff --git a/snippets/initializeArrayWithValues.md b/snippets/initializeArrayWithValues.md
index b91496068..46880dd45 100644
--- a/snippets/initializeArrayWithValues.md
+++ b/snippets/initializeArrayWithValues.md
@@ -3,10 +3,10 @@
 Initializes and fills an array with the specified values.
 
 Use `Array(n)` to create an array of the desired length, `fill(v)` to fill it with the desired values.
-You can omit `value` to use a default value of `0`.
+You can omit `val` to use a default value of `0`.
 
 ```js
-const initializeArrayWithValues = (n, value = 0) => Array(n).fill(value);
+const initializeArrayWithValues = (n, val = 0) => Array(n).fill(val);
 ```
 
 ```js
diff --git a/snippets/isArray.md b/snippets/isArray.md
index ebe1efecc..def452a89 100644
--- a/snippets/isArray.md
+++ b/snippets/isArray.md
@@ -5,10 +5,9 @@ Checks if the given argument is an array.
 Use `Array.isArray()` to check if a value is classified as an array.
 
 ```js
-const isArray = val => !!val && Array.isArray(val);
+const isArray = val => Array.isArray(val);
 ```
 
 ```js
-isArray(null); // false
 isArray([1]); // true
 ```
diff --git a/snippets/isFunction.md b/snippets/isFunction.md
index e507bb9e5..0cf8ee580 100644
--- a/snippets/isFunction.md
+++ b/snippets/isFunction.md
@@ -9,7 +9,6 @@ const isFunction = val => typeof val === 'function';
 ```
 
 ```js
-isFunction(null); // false
 isFunction('x'); // false
 isFunction(x => x); // true
 ```
diff --git a/snippets/lcm.md b/snippets/lcm.md
index 4b560f29d..cbd86c264 100644
--- a/snippets/lcm.md
+++ b/snippets/lcm.md
@@ -1,6 +1,6 @@
 ### lcm
 
-Returns the least common multiple of two or more numbers/arrays.
+Returns the least common multiple of two or more numbers.
 
 Use the greatest common divisor (GCD) formula and `Math.abs()` to determine the least common multiple.
 The GCD formula uses recursion.
@@ -9,11 +9,11 @@ The GCD formula uses recursion.
 const lcm = (...arr) => {
   const gcd = (x, y) => (!y ? x : gcd(y, x % y));
   const _lcm = (x, y) => x * y / gcd(x, y);
-  return [].concat(...arr).reduce((a, b) => _lcm(a, b));
+  return [...arr].reduce((a, b) => _lcm(a, b));
 };
 ```
 
 ```js
 lcm(12, 7); // 84
-lcm([1, 3, 4], 5); // 60
+lcm(...[1, 3, 4, 5]); // 60
 ```
diff --git a/snippets/mask.md b/snippets/mask.md
index 7257e76fc..7cdf3d104 100644
--- a/snippets/mask.md
+++ b/snippets/mask.md
@@ -2,7 +2,7 @@
 
 Replaces all but the last `num` of characters with the specified mask character.
 
-Use `String.slice()` to grab the portion of the characters that need to be masked and use `String.replace()` with a regex to replace every character with the mask character.
+Use `String.slice()` to grab the portion of the characters that need to be masked and use `String.replace()` with a regexp to replace every character with the mask character.
 Concatenate the masked characters with the remaining unmasked portion of the string.
 Omit the second argument, `num`, to keep a default of `4` characters unmasked. If `num` is negative, the unmasked characters will be at the start of the string.
 Omit the third argument, `mask`, to use a default character of `'*'` for the mask.
diff --git a/snippets/negate.md b/snippets/negate.md
index b8e4b4ab4..9c621990e 100644
--- a/snippets/negate.md
+++ b/snippets/negate.md
@@ -2,7 +2,7 @@
 
 Negates a predicate function.
 
-Take a predicate function and apply `not` to it with its arguments.
+Take a predicate function and apply the not operator (`!`) to it with its arguments.
 
 ```js
 const negate = func => (...args) => !func(...args);
diff --git a/snippets/orderBy.md b/snippets/orderBy.md
index 5bed5a07e..fb8c99310 100644
--- a/snippets/orderBy.md
+++ b/snippets/orderBy.md
@@ -2,8 +2,8 @@
 
 Returns a sorted array of objects ordered by properties and orders.
 
-Uses a custom implementation of sort, that reduces the props array argument with a default value of 0, it uses destructuring to swap the properties position depending on the order passed.
-If no orders array is passed it sort by 'asc' by default.
+Uses `Array.sort()`, `Array.reduce()` on the `props` array with a default value of `0`, use array destructuring to swap the properties position depending on the order passed.
+If no `orders` array is passed it sort by `'asc'` by default.
 
 ```js
 const orderBy = (arr, props, orders) =>
diff --git a/snippets/palindrome.md b/snippets/palindrome.md
index e5d4601e4..4db143f65 100644
--- a/snippets/palindrome.md
+++ b/snippets/palindrome.md
@@ -2,8 +2,8 @@
 
 Returns `true` if the given string is a palindrome, `false` otherwise.
 
-Convert string `toLowerCase()` and use `replace()` to remove non-alphanumeric characters from it.
-Then, `split('')` into individual characters, `reverse()`, `join('')` and compare to the original, unreversed string, after converting it `tolowerCase()`.
+Convert string `String.toLowerCase()` and use `String.replace()` to remove non-alphanumeric characters from it.
+Then, `String.split('')` into individual characters, `Array.reverse()`, `String.join('')` and compare to the original, unreversed string, after converting it `String.tolowerCase()`.
 
 ```js
 const palindrome = str => {
diff --git a/snippets/repeatString.md b/snippets/repeatString.md
deleted file mode 100644
index 221883ecf..000000000
--- a/snippets/repeatString.md
+++ /dev/null
@@ -1,16 +0,0 @@
-### repeatString
-
-Repeats a string n times using `String.repeat()`
-
-If no string is provided the default is `""` and the default number of times is 2.
-
-```js
-const repeatString = (str = '', num = 2) => {
-  return num >= 0 ? str.repeat(num) : str;
-};
-```
-
-```js
-repeatString('abc', 3); // 'abcabcabc'
-repeatString('abc'); // 'abcabc'
-```
diff --git a/snippets/reverseString.md b/snippets/reverseString.md
index 95935d47c..ad33f0a4c 100644
--- a/snippets/reverseString.md
+++ b/snippets/reverseString.md
@@ -2,13 +2,12 @@
 
 Reverses a string.
 
-Use `split('')` and `Array.reverse()` to reverse the order of the characters in the string.
-Combine characters to get a string using `join('')`.
+Use the spread operator (`...`) and `Array.reverse()` to reverse the order of the characters in the string.
+Combine characters to get a string using `String.join('')`.
 
 ```js
 const reverseString = str =>
-  str
-    .split('')
+  [..str]
     .reverse()
     .join('');
 ```
diff --git a/snippets/sdbm.md b/snippets/sdbm.md
index d64fd2f67..17231a9f2 100644
--- a/snippets/sdbm.md
+++ b/snippets/sdbm.md
@@ -1,8 +1,8 @@
 ### sbdm
 
-This algorithm is a simple hash-algorithm that hashes it input string `s` into a whole number.
+Hashes the input string into a whole number.
 
-Use `split('')` and `Array.reduce()` to create a hash of the input string, utilizing bit shifting.
+Use `String.split('')` and `Array.reduce()` to create a hash of the input string, utilizing bit shifting.
 
 ```js
 const sdbm = str => {
diff --git a/snippets/select.md b/snippets/select.md
index 6cb60448b..e000a3cec 100644
--- a/snippets/select.md
+++ b/snippets/select.md
@@ -1,6 +1,6 @@
 ### select
 
-Retrieve a property that indicated by the selector from an object.
+Retrieve a property indicated by the selector from an object.
 
 If the property does not exists returns `undefined`.
 
diff --git a/snippets/setStyle.md b/snippets/setStyle.md
index ef70e78ad..b85c5207c 100644
--- a/snippets/setStyle.md
+++ b/snippets/setStyle.md
@@ -2,10 +2,10 @@
 
 Sets the value of a CSS rule for the specified element.
 
-Use `element.style` to set the value of the CSS rule for the specified element to `value`.
+Use `element.style` to set the value of the CSS rule for the specified element to `val`.
 
 ```js
-const setStyle = (el, ruleName, value) => (el.style[ruleName] = value);
+const setStyle = (el, ruleName, val) => (el.style[ruleName] = val);
 ```
 
 ```js
diff --git a/snippets/shuffle.md b/snippets/shuffle.md
index 97b25e8cf..c5ee974d2 100644
--- a/snippets/shuffle.md
+++ b/snippets/shuffle.md
@@ -2,7 +2,7 @@
 
 Randomizes the order of the values of an array, returning a new array.
 
-Uses the Fisher-Yates algorithm to reorder the elements of the array, based on the [Lodash implementation](https://github.com/lodash/lodash/blob/b2ea6b1cd251796dcb5f9700c4911a7b6223920b/shuffle.js), but as a pure function.
+Uses the [Fisher-Yates algorithm](https://github.com/chalarangelo/30-seconds-of-code#shuffle) to reorder the elements of the array.
 
 ```js
 const shuffle = ([...arr]) => {
diff --git a/snippets/similarity.md b/snippets/similarity.md
index 7aade10ef..1736aebcd 100644
--- a/snippets/similarity.md
+++ b/snippets/similarity.md
@@ -2,7 +2,7 @@
 
 Returns an array of elements that appear in both arrays.
 
-Use `filter()` to remove values that are not part of `values`, determined using `includes()`.
+Use `Array.filter()` to remove values that are not part of `values`, determined using `Array.includes()`.
 
 ```js
 const similarity = (arr, values) => arr.filter(v => values.includes(v));
diff --git a/snippets/size.md b/snippets/size.md
index 1c3127929..04a5ff478 100644
--- a/snippets/size.md
+++ b/snippets/size.md
@@ -2,20 +2,20 @@
 
 Get size of arrays, objects or strings.
 
-Get type of `value` (`array`, `object` or `string`). 
-Use `length` property for arrays. 
-Use `length` or `size` value if available or number of keys for objects. 
-Use `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) created from `value` for strings.
+Get type of `val` (`array`, `object` or `string`). 
+Use `length` property for arrays.
+Use `length` or `size` value if available or number of keys for objects.
+Use `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) created from `val` for strings.
 
 Split strings into array of characters with `split('')` and return its length.
 
 ```js
-const size = value =>
-  Array.isArray(value)
-    ? value.length
-    : value && typeof value === 'object'
-      ? value.size || value.length || Object.keys(value).length
-      : typeof value === 'string' ? new Blob([value]).size : 0;
+const size = val =>
+  Array.isArray(val)
+    ? val.length
+    : val && typeof val === 'object'
+      ? val.size || val.length || Object.keys(val).length
+      : typeof val === 'string' ? new Blob([val]).size : 0;
 ```
 
 ```js
diff --git a/snippets/sortCharactersInString.md b/snippets/sortCharactersInString.md
index e9b8c50ae..9ca8c4af3 100644
--- a/snippets/sortCharactersInString.md
+++ b/snippets/sortCharactersInString.md
@@ -2,12 +2,11 @@
 
 Alphabetically sorts the characters in a string.
 
-Split the string using `split('')`, `Array.sort()` utilizing `localeCompare()`, recombine using `join('')`.
+Use the spread operator (`...`), `Array.sort()` and  `String.localeCompare()` to sort the characters in `str`, recombine using `String.join('')`.
 
 ```js
 const sortCharactersInString = str =>
-  str
-    .split('')
+  [...str]
     .sort((a, b) => a.localeCompare(b))
     .join('');
 ```
diff --git a/snippets/sum.md b/snippets/sum.md
index a69aa3d4f..0c03ab736 100644
--- a/snippets/sum.md
+++ b/snippets/sum.md
@@ -5,9 +5,9 @@ Returns the sum of two or more numbers/arrays.
 Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`.
 
 ```js
-const sum = (...arr) => [].concat(...arr).reduce((acc, val) => acc + val, 0);
+const sum = (...arr) => [...arr].reduce((acc, val) => acc + val, 0);
 ```
 
 ```js
-sum([1, 2, 3, 4]); // 10
+sum(...[1, 2, 3, 4]); // 10
 ```
diff --git a/snippets/tail.md b/snippets/tail.md
index ed2a1458b..49cba196c 100644
--- a/snippets/tail.md
+++ b/snippets/tail.md
@@ -2,7 +2,7 @@
 
 Returns all elements in an array except for the first one.
 
-Return `arr.slice(1)` if the array's `length` is more than `1`, otherwise, return the whole array.
+Return `Array.slice(1)` if the array's `length` is more than `1`, otherwise, return the whole array.
 
 ```js
 const tail = arr => (arr.length > 1 ? arr.slice(1) : arr);
diff --git a/snippets/toCamelCase.md b/snippets/toCamelCase.md
index 489c045f3..393082f77 100644
--- a/snippets/toCamelCase.md
+++ b/snippets/toCamelCase.md
@@ -2,8 +2,7 @@
 
 Converts a string to camelcase.
 
-Break the string into words and combine them capitalizing the first letter of each word.
-For more detailed explanation of this Regex, [visit this Site](https://regex101.com/r/bMCgAB/1).
+Break the string into words and combine them capitalizing the first letter of each word, using a regexp.
 
 ```js
 const toCamelCase = str => {
diff --git a/snippets/toKebabCase.md b/snippets/toKebabCase.md
index 0c506eb21..4e456982e 100644
--- a/snippets/toKebabCase.md
+++ b/snippets/toKebabCase.md
@@ -2,8 +2,7 @@
 
 Converts a string to kebab case.
 
-Break the string into words and combine them using `-` as a separator.
-For more detailed explanation of this Regex, [visit this Site](https://regex101.com/r/bMCgAB/1).
+Break the string into words and combine them adding `-` as a separator, using a regexp.
 
 ```js
 const toKebabCase = str =>
diff --git a/snippets/toSnakeCase.md b/snippets/toSnakeCase.md
index 983095f47..d21d40222 100644
--- a/snippets/toSnakeCase.md
+++ b/snippets/toSnakeCase.md
@@ -2,8 +2,7 @@
 
 Converts a string to snake case.
 
-Break the string into words and combine them using `_` as a separator.
-For more detailed explanation of this Regex, [visit this Site](https://regex101.com/r/bMCgAB/1).
+Break the string into words and combine them adding `_` as a separator, using a regexp.
 
 ```js
 const toSnakeCase = str =>
diff --git a/snippets/tomorrow.md b/snippets/tomorrow.md
index 5b4614424..3bd5a6412 100644
--- a/snippets/tomorrow.md
+++ b/snippets/tomorrow.md
@@ -1,7 +1,7 @@
 ### tomorrow
 
 Results in a string representation of tomorrow's date.
-Use `new Date()` to get today's date, adding `86400000` of seconds to it(24 hours), using `toISOString` to convert Date object to string.
+Use `new Date()` to get today's date, adding `86400000` of seconds to it(24 hours), using `Date.toISOString()` to convert Date object to string.
 
 ```js
 const tomorrow = () => new Date(new Date().getTime() + 86400000).toISOString().split('T')[0];
diff --git a/snippets/truncateString.md b/snippets/truncateString.md
index faded5500..951343be9 100644
--- a/snippets/truncateString.md
+++ b/snippets/truncateString.md
@@ -3,7 +3,7 @@
 Truncates a string up to a specified length.
 
 Determine if the string's `length` is greater than `num`.
-Return the string truncated to the desired length, with `...` appended to the end or the original string.
+Return the string truncated to the desired length, with `'...'` appended to the end or the original string.
 
 ```js
 const truncateString = (str, num) =>
diff --git a/snippets/validateNumber.md b/snippets/validateNumber.md
index e41370a1e..17a5987d1 100644
--- a/snippets/validateNumber.md
+++ b/snippets/validateNumber.md
@@ -2,7 +2,7 @@
 
 Returns `true` if the given value is a number, `false` otherwise.
 
-Use `!isNaN` in combination with `parseFloat()` to check if the argument is a number.
+Use `!isNaN()` in combination with `parseFloat()` to check if the argument is a number.
 Use `isFinite()` to check if the number is finite.
 Use `Number()` to check if the coercion holds.
 
diff --git a/snippets/words.md b/snippets/words.md
index bc5f9cee3..425bfbf71 100644
--- a/snippets/words.md
+++ b/snippets/words.md
@@ -2,8 +2,8 @@
 
 Converts a given string into an array of words.
 
-Use `String.split()` with a supplied pattern (defaults to non-alpha as a regex) to convert to an array of strings. Use `Array.filter()` to remove any empty strings.
-Omit the second argument to use the default regex.
+Use `String.split()` with a supplied pattern (defaults to non-alpha as a regexp) to convert to an array of strings. Use `Array.filter()` to remove any empty strings.
+Omit the second argument to use the default regexp.
 
 ```js
 const words = (str, pattern = /[^a-zA-Z-]+/) => str.split(pattern).filter(Boolean);
diff --git a/snippets/JSONToDate.md b/snippets_archive/JSONToDate.md
similarity index 100%
rename from snippets/JSONToDate.md
rename to snippets_archive/JSONToDate.md
diff --git a/snippets/collatz.md b/snippets_archive/collatz.md
similarity index 100%
rename from snippets/collatz.md
rename to snippets_archive/collatz.md
diff --git a/snippets/factors.md b/snippets_archive/factors.md
similarity index 100%
rename from snippets/factors.md
rename to snippets_archive/factors.md
diff --git a/snippets/fibonacciCountUntilNum.md b/snippets_archive/fibonacciCountUntilNum.md
similarity index 100%
rename from snippets/fibonacciCountUntilNum.md
rename to snippets_archive/fibonacciCountUntilNum.md
diff --git a/snippets/fibonacciUntilNum.md b/snippets_archive/fibonacciUntilNum.md
similarity index 100%
rename from snippets/fibonacciUntilNum.md
rename to snippets_archive/fibonacciUntilNum.md
diff --git a/snippets/howManyTimes.md b/snippets_archive/howManyTimes.md
similarity index 100%
rename from snippets/howManyTimes.md
rename to snippets_archive/howManyTimes.md
diff --git a/snippets/isArmstrongNumber.md b/snippets_archive/isArmstrongNumber.md
similarity index 100%
rename from snippets/isArmstrongNumber.md
rename to snippets_archive/isArmstrongNumber.md
diff --git a/snippets/quickSort.md b/snippets_archive/quickSort.md
similarity index 100%
rename from snippets/quickSort.md
rename to snippets_archive/quickSort.md
diff --git a/snippets/solveRPN.md b/snippets_archive/solveRPN.md
similarity index 100%
rename from snippets/solveRPN.md
rename to snippets_archive/solveRPN.md
diff --git a/snippets/speechSynthesis.md b/snippets_archive/speechSynthesis.md
similarity index 100%
rename from snippets/speechSynthesis.md
rename to snippets_archive/speechSynthesis.md
diff --git a/tag_database b/tag_database
index dc0014097..ca925c056 100644
--- a/tag_database
+++ b/tag_database
@@ -1,186 +1,176 @@
-anagrams:string
-arrayToHtmlList:browser
-average:math
+anagrams:string,recursion
+arrayToHtmlList:browser,array
+average:math,array
 bottomVisible:browser
 byteSize:string
-call:adapter
-capitalize:string
-capitalizeEveryWord:string
+call:adapter,function
+capitalize:string,array
+capitalizeEveryWord:string,regexp
 chainAsync:function
 chunk:array
 clampNumber:math
-cleanObj:object
-cloneRegExp:utility
+cleanObj:object,json
+cloneRegExp:utility,regexp
 coalesce:utility
 coalesceFactory:utility
-collatz:math
-collectInto:adapter
+collectInto:adapter,function,array
 compact:array
 compose:function
-copyToClipboard:browser
+copyToClipboard:browser,string,advanced
 countOccurrences:array
 countVowels:string
-currentURL:browser
-curry:function
-deepFlatten:array
+currentURL:browser,url
+curry:function,recursion
+deepFlatten:array,recursion
 defer:function
 detectDeviceType:browser
-difference:array
-differenceWith:array
-digitize:math
+difference:array,math
+differenceWith:array,function
+digitize:math,array
 distance:math
 distinctValuesOfArray:array
-dropElements:array
+dropElements:array,function
 dropRight:array
 elementIsVisibleInViewport:browser
-elo:math
-escapeHTML:string
-escapeRegExp:string
+elo:math,array,advanced
+escapeHTML:string,browser,regexp
+escapeRegExp:string,regexp
 everyNth:array
-extendHex:utility
-factorial:math
-factors:math
-fibonacci:math
-fibonacciCountUntilNum:math
-fibonacciUntilNum:math
+extendHex:utility,string
+factorial:math,recursion
+fibonacci:math,array
 filterNonUnique:array
 flatten:array
-flattenDepth:array
-flip:adapter
-formatDuration:date
+flattenDepth:array,recursion
+flip:adapter,function
+formatDuration:date,math,string,utility
 fromCamelCase:string
-functionName:function
-gcd:math
+functionName:function,utility
+gcd:math,recursion
 geometricProgression:math
 getDaysDiffBetweenDates:date
 getScrollPosition:browser
-getStyle:browser
-getType:utility
-getURLParameters:utility
+getStyle:browser,css
+getType:type
+getURLParameters:utility,browser,string,url
 groupBy:array
 hammingDistance:math
-hasClass:browser
+hasClass:browser,css
 hasFlags:node
 head:array
-hexToRGB:utility
-hide:browser
-howManyTimes:math
-httpsRedirect:browser
+hexToRGB:utility,string,math,advanced
+hide:browser,css
+httpsRedirect:browser,url
 initial:array
 initialize2DArray:array
-initializeArrayWithRange:array
-initializeArrayWithValues:array
+initializeArrayWithRange:array,math
+initializeArrayWithValues:array,amth
 inRange:math
-intersection:array
+intersection:array,math
 invertKeyValues:object
-isAbsoluteURL:string
-isArmstrongNumber:math
-isArray:utility
-isArrayLike:utility
-isBoolean:utility
+isAbsoluteURL:string,utility,browser,url
+isArray:type,array
+isArrayLike:type,array
+isBoolean:type
 isDivisible:math
 isEven:math
-isFunction:utility
-isNull:utility
-isNumber:utility
+isFunction:type,function
+isNull:type
+isNumber:type,math
 isPrime:math
-isPrimitive:utility
-isPromiseLike:utility
+isPrimitive:type,function,array,string
+isPromiseLike:type,function,promise
 isSorted:array
-isString:utility
-isSymbol:utility
+isString:type,string
+isSymbol:type
 isTravisCI:node
-isValidJSON:utility
+isValidJSON:type,json
 join:array
-JSONToDate:date
-JSONToFile:node
+JSONToFile:node,json
 last:array
-lcm:math
+lcm:math,recursion
 lowercaseKeys:object
-luhnCheck:math
-mapObject:array
-mask:string
-maxN:array
-median:math
+luhnCheck:math,utility
+mapObject:array,object
+mask:string,utility,regexp
+maxN:array,math
+median:math,array
 memoize:function
-minN:array
-negate:logic
+minN:array,amth
+negate:logic,function
 nthElement:array
-objectFromPairs:object
-objectToPairs:object
+objectFromPairs:object,array
+objectToPairs:object,array
 once:function
-onUserInputChange:browser
-orderBy:object
+onUserInputChange:browser,advanced
+orderBy:object,array
 palindrome:string
 percentile:math
 pick:array
-pipeFunctions:adapter
+pipeFunctions:adapter,function
 pluralize:string
 powerset:math
-prettyBytes:utility
-primes:math
-promisify:adapter
+prettyBytes:utility,string,math
+primes:math,array
+promisify:adapter,function,promise
 pull:array
 pullAtIndex:array
 pullAtValue:array
-quickSort:array
-randomHexColorCode:utility
-randomIntegerInRange:math
-randomNumberInRange:math
-readFileLines:node
-redirect:browser
+randomHexColorCode:utility,random
+randomIntegerInRange:math,utility,random
+randomNumberInRange:math,utility,random
+readFileLines:node,array,string
+redirect:browser,url
 reducedFilter:array
 remove:array
 repeatString:string
-reverseString:string
+reverseString:string,array
 RGBToHex:utility
 round:math
-runAsync:browser
-runPromisesInSeries:function
-sample:array
-sampleSize:array
+runAsync:browser,function,advanced,promise,url
+runPromisesInSeries:function,promise
+sample:array,random
+sampleSize:array,random
 scrollToTop:browser
-sdbm:utility
+sdbm:math,utility
 select:object
 setStyle:browser
 shallowClone:object
-show:browser
-shuffle:array
-similarity:array
-size:object
-sleep:function
-solveRPN:math
+show:browser,css
+shuffle:array,random
+similarity:array,math
+size:object,array,string
+sleep:function,promise
 sortCharactersInString:string
-sortedIndex:array
-speechSynthesis:browser
+sortedIndex:array,math
 splitLines:string
 spreadOver:adapter
-standardDeviation:math
-sum:math
+standardDeviation:math,array
+sum:math,array
 sumPower:math
-symmetricDifference:array
+symmetricDifference:array,math
 tail:array
 take:array
 takeRight:array
 timeTaken:utility
-toCamelCase:string
-toDecimalMark:utility
-toEnglishDate:date
+toCamelCase:string,regexp
+toDecimalMark:utility,math
+toEnglishDate:date,string
 toggleClass:browser
-toKebabCase:string
+toKebabCase:string,regexp
 tomorrow:date
-toOrdinalSuffix:utility
-toSnakeCase:string
+toOrdinalSuffix:utility,math
+toSnakeCase:string,regexp
 truncateString:string
-truthCheckCollection:object
-unescapeHTML:string
-union:array
-untildify:node
-UUIDGeneratorBrowser:browser
-UUIDGeneratorNode:node
-validateNumber:utility
+truthCheckCollection:object,logic,array
+unescapeHTML:string,browser
+union:array,math
+untildify:node,string
+UUIDGeneratorBrowser:browser,utility,random
+UUIDGeneratorNode:node,utility,random
+validateNumber:utility,math
 without:array
-words:string
-yesNo:utility
+words:string,regexp
+yesNo:utility,regexp
 zip:array
-zipObject:array
+zipObject:array,object

From a9246df780d45212149138d8042bc5fe9c006aa6 Mon Sep 17 00:00:00 2001
From: 30secondsofcode <30secondsofcode@gmail.com>
Date: Fri, 5 Jan 2018 14:41:29 +0000
Subject: [PATCH 10/14] Travis build: 1041

---
 README.md                          | 5074 +++++++++++++---------------
 docs/index.html                    |  338 +-
 snippets/gcd.md                    |    2 +-
 snippets/reverseString.md          |    1 +
 snippets/sortCharactersInString.md |    5 +-
 tag_database                       |    1 -
 6 files changed, 2431 insertions(+), 2990 deletions(-)

diff --git a/README.md b/README.md
index 3ef0c0593..7248a6bee 100644
--- a/README.md
+++ b/README.md
@@ -1,74 +1,3 @@
-<<<<<<< HEAD
-![Logo](/logo.png)
-
-# 30 seconds of code
-
-[![License](https://img.shields.io/badge/license-CC0--1.0-blue.svg)](https://github.com/Chalarangelo/30-seconds-of-code/blob/master/LICENSE) [![npm Downloads](https://img.shields.io/npm/dt/30-seconds-of-code.svg)](https://www.npmjs.com/package/30-seconds-of-code) [![npm Version](https://img.shields.io/npm/v/30-seconds-of-code.svg)](https://www.npmjs.com/package/30-seconds-of-code) [![Gitter chat](https://img.shields.io/badge/chat-on%20gitter-4FB999.svg)](https://gitter.im/30-seconds-of-code/Lobby) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](http://makeapullrequest.com) [![Travis Build](https://travis-ci.org/Chalarangelo/30-seconds-of-code.svg?branch=master)](https://travis-ci.org/Chalarangelo/30-seconds-of-code) [![Insight.io](https://img.shields.io/badge/insight.io-Ready-brightgreen.svg)](https://insight.io/github.com/Chalarangelo/30-seconds-of-code/tree/master/?source=0) [![js-semistandard-style](https://img.shields.io/badge/code%20style-semistandard-brightgreen.svg)](https://github.com/Flet/semistandard) [![ProductHunt](https://img.shields.io/badge/producthunt-vote-orange.svg)](https://www.producthunt.com/posts/30-seconds-of-code)
-
-
-> Curated collection of useful JavaScript snippets that you can understand in 30 seconds or less.
-
-
-- Use <kbd>Ctrl</kbd> + <kbd>F</kbd> or <kbd>command</kbd> + <kbd>F</kbd> to search for a snippet.
-- Contributions welcome, please read the [contribution guide](CONTRIBUTING.md).
-- Snippets are written in ES6, use the [Babel transpiler](https://babeljs.io/) to ensure backwards-compatibility.
-- You can import these snippets into your text editor of choice (VSCode, Atom, Sublime) using the files found in [this repo](https://github.com/Rob-Rychs/30-seconds-of-code-texteditorsnippets).
-- You can import these snippets into Alfred 3, using [this file](https://github.com/lslvxy/30-seconds-of-code-alfredsnippets).
-
-#### Package
-
-⚠️ **WARNING:** Snippets are not production ready.
-
-You can find a package with all the snippets on [npm](https://www.npmjs.com/package/30-seconds-of-code).
-
-```
-npm install 30-seconds-of-code
-```
-
-CDN links
-- [ES2017 Full (UMD)](https://unpkg.com/30-seconds-of-code)
-- [ES5 Minified (UMD)](https://unpkg.com/30-seconds-of-code/dist/_30s.es5.min.js)
-
-<details>
-
-**Browser**
-
-> IMPORTANT: replace the `src` with the full version link and desired target spec (such as ES5 minified)):
-
-```html
-<script src="https://unpkg.com/30-seconds-of-code"></script>
-<script>
-  _30s.average(1, 2, 3);
-</script>
-```
-
-**Node**
-
-```js
-// CommonJS
-const _30s = require('30-seconds-of-code');
-_30s.average(1, 2, 3);
-
-// ES Modules
-import _30s from '30-seconds-of-code';
-_30s.average(1, 2, 3);
-```
-
-To import snippets directly:
-
-```js
-// CommonJS
-const { average } = require('30-seconds-of-code');
-average(1, 2, 3);
-
-// ES Modules
-import { average } from '30-seconds-of-code';
-average(1, 2, 3);
-```
-</details>
-
-## Table of Contents
-=======
 ![Logo](/logo.png)
 
 # 30 seconds of code
@@ -138,7 +67,6 @@ average(1, 2, 3);
 </details>
 
 ## Table of Contents
->>>>>>> master
 
 ### 🔌 Adapter
 
@@ -190,7 +118,6 @@ average(1, 2, 3);
 * [`pull`](#pull)
 * [`pullAtIndex`](#pullatindex)
 * [`pullAtValue`](#pullatvalue)
-* [`quickSort`](#quicksort)
 * [`reducedFilter`](#reducedfilter)
 * [`remove`](#remove)
 * [`sample`](#sample)
@@ -231,7 +158,6 @@ average(1, 2, 3);
 * [`scrollToTop`](#scrolltotop)
 * [`setStyle`](#setstyle)
 * [`show`](#show)
-* [`speechSynthesis`](#speechsynthesis)
 * [`toggleClass`](#toggleclass)
 * [`UUIDGeneratorBrowser`](#uuidgeneratorbrowser)
 
@@ -244,7 +170,6 @@ average(1, 2, 3);
 
 * [`formatDuration`](#formatduration)
 * [`getDaysDiffBetweenDates`](#getdaysdiffbetweendates)
-* [`JSONToDate`](#jsontodate)
 * [`toEnglishDate`](#toenglishdate)
 * [`tomorrow`](#tomorrow)
 
@@ -283,21 +208,15 @@ average(1, 2, 3);
 
 * [`average`](#average)
 * [`clampNumber`](#clampnumber)
-* [`collatz`](#collatz)
 * [`digitize`](#digitize)
 * [`distance`](#distance)
 * [`elo`](#elo)
 * [`factorial`](#factorial)
-* [`factors`](#factors)
 * [`fibonacci`](#fibonacci)
-* [`fibonacciCountUntilNum`](#fibonaccicountuntilnum)
-* [`fibonacciUntilNum`](#fibonacciuntilnum)
 * [`gcd`](#gcd)
 * [`geometricProgression`](#geometricprogression)
 * [`hammingDistance`](#hammingdistance)
-* [`howManyTimes`](#howmanytimes)
 * [`inRange`](#inrange)
-* [`isArmstrongNumber`](#isarmstrongnumber)
 * [`isDivisible`](#isdivisible)
 * [`isEven`](#iseven)
 * [`isPrime`](#isprime)
@@ -310,7 +229,7 @@ average(1, 2, 3);
 * [`randomIntegerInRange`](#randomintegerinrange)
 * [`randomNumberInRange`](#randomnumberinrange)
 * [`round`](#round)
-* [`solveRPN`](#solverpn)
+* [`sdbm`](#sdbm)
 * [`standardDeviation`](#standarddeviation)
 * [`sum`](#sum)
 * [`sumPower`](#sumpower)
@@ -366,7 +285,6 @@ average(1, 2, 3);
 * [`mask`](#mask)
 * [`palindrome`](#palindrome)
 * [`pluralize`](#pluralize)
-* [`repeatString`](#repeatstring)
 * [`reverseString`](#reversestring)
 * [`sortCharactersInString`](#sortcharactersinstring)
 * [`splitLines`](#splitlines)
@@ -379,18 +297,12 @@ average(1, 2, 3);
 
 </details>
 
-### 🔧 Utility
+###  Type
 
 <details>
 <summary>View contents</summary>
 
-* [`cloneRegExp`](#cloneregexp)
-* [`coalesce`](#coalesce)
-* [`coalesceFactory`](#coalescefactory)
-* [`extendHex`](#extendhex)
 * [`getType`](#gettype)
-* [`getURLParameters`](#geturlparameters)
-* [`hexToRGB`](#hextorgb)
 * [`isArray`](#isarray)
 * [`isArrayLike`](#isarraylike)
 * [`isBoolean`](#isboolean)
@@ -402,10 +314,23 @@ average(1, 2, 3);
 * [`isString`](#isstring)
 * [`isSymbol`](#issymbol)
 * [`isValidJSON`](#isvalidjson)
+
+</details>
+
+### 🔧 Utility
+
+<details>
+<summary>View contents</summary>
+
+* [`cloneRegExp`](#cloneregexp)
+* [`coalesce`](#coalesce)
+* [`coalesceFactory`](#coalescefactory)
+* [`extendHex`](#extendhex)
+* [`getURLParameters`](#geturlparameters)
+* [`hexToRGB`](#hextorgb)
 * [`prettyBytes`](#prettybytes)
 * [`randomHexColorCode`](#randomhexcolorcode)
 * [`RGBToHex`](#rgbtohex)
-* [`sdbm`](#sdbm)
 * [`timeTaken`](#timetaken)
 * [`toDecimalMark`](#todecimalmark)
 * [`toOrdinalSuffix`](#toordinalsuffix)
@@ -473,7 +398,7 @@ Pall(p1, p2, p3).then(console.log);
 
 ### flip
 
-Flip takes a function as an argument, then makes the first argument the last
+Flip takes a function as an argument, then makes the first argument the last.
 
 Return a closure that takes variadic inputs, and splices the last argument to make it the first argument before applying the rest.
 
@@ -499,17 +424,17 @@ Object.assign(b, a); // == b
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### pipeFunctions
-
-Performs left-to-right function composition.
-
-Use `Array.reduce()` with the spread operator (`...`) to perform left-to-right function composition.
-The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.
-
+### pipeFunctions
+
+Performs left-to-right function composition.
+
+Use `Array.reduce()` with the spread operator (`...`) to perform left-to-right function composition.
+The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.
+
 ```js
 const pipeFunctions = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args)));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -518,36 +443,36 @@ const add5 = x => x + 5;
 const multiply = (x, y) => x * y;
 const multiplyAndAdd5 = pipeFunctions(multiply, add5);
 multiplyAndAdd5(5, 2); // 15
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### promisify
-
-Converts an asynchronous function to return a promise.
-
-Use currying to return a function returning a `Promise` that calls the original function.
-Use the `...rest` operator to pass in all the parameters.
-
-*In Node 8+, you can use [`util.promisify`](https://nodejs.org/api/util.html#util_util_promisify_original)*
-
+### promisify
+
+Converts an asynchronous function to return a promise.
+
+Use currying to return a function returning a `Promise` that calls the original function.
+Use the `...rest` operator to pass in all the parameters.
+
+*In Node 8+, you can use [`util.promisify`](https://nodejs.org/api/util.html#util_util_promisify_original)*
+
 ```js
 const promisify = func => (...args) =>
   new Promise((resolve, reject) =>
     func(...args, (err, result) => (err ? reject(err) : resolve(result)))
   );
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const delay = promisify((d, cb) => setTimeout(cb, d));
 delay(2000).then(() => console.log('Hi!')); // // Promise resolves after 2s
-```
+```
 
 </details>
 
@@ -579,206 +504,206 @@ arrayMax([1, 2, 3]); // 3
 ---
  ## 📚 Array
 
-### chunk
-
-Chunks an array into smaller arrays of a specified size.
-
-Use `Array.from()` to create a new array, that fits the number of chunks that will be produced.
-Use `Array.slice()` to map each element of the new array to a chunk the length of `size`.
-If the original array can't be split evenly, the final chunk will contain the remaining elements.
-
+### chunk
+
+Chunks an array into smaller arrays of a specified size.
+
+Use `Array.from()` to create a new array, that fits the number of chunks that will be produced.
+Use `Array.slice()` to map each element of the new array to a chunk the length of `size`.
+If the original array can't be split evenly, the final chunk will contain the remaining elements.
+
 ```js
 const chunk = (arr, size) =>
   Array.from({ length: Math.ceil(arr.length / size) }, (v, i) =>
     arr.slice(i * size, i * size + size)
   );
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 chunk([1, 2, 3, 4, 5], 2); // [[1,2],[3,4],[5]]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### compact
-
-Removes falsey values from an array.
-
-Use `Array.filter()` to filter out falsey values (`false`, `null`, `0`, `""`, `undefined`, and `NaN`).
-
+### compact
+
+Removes falsey values from an array.
+
+Use `Array.filter()` to filter out falsey values (`false`, `null`, `0`, `""`, `undefined`, and `NaN`).
+
 ```js
 const compact = arr => arr.filter(Boolean);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 compact([0, 1, false, 2, '', 3, 'a', 'e' * 23, NaN, 's', 34]); // [ 1, 2, 3, 'a', 's', 34 ]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### countOccurrences
-
-Counts the occurrences of a value in an array.
-
-Use `Array.reduce()` to increment a counter each time you encounter the specific value inside the array.
-
+### countOccurrences
+
+Counts the occurrences of a value in an array.
+
+Use `Array.reduce()` to increment a counter each time you encounter the specific value inside the array.
+
 ```js
-const countOccurrences = (arr, value) => arr.reduce((a, v) => (v === value ? a + 1 : a + 0), 0);
-```
-
+const countOccurrences = (arr, val) => arr.reduce((a, v) => (v === val ? a + 1 : a + 0), 0);
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 countOccurrences([1, 1, 2, 1, 2, 3], 1); // 3
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### deepFlatten
-
-Deep flattens an array.
-
-Use recursion.
-Use `Array.concat()` with an empty array (`[]`) and the spread operator (`...`) to flatten an array.
-Recursively flatten each element that is an array.
-
+### deepFlatten
+
+Deep flattens an array.
+
+Use recursion.
+Use `Array.concat()` with an empty array (`[]`) and the spread operator (`...`) to flatten an array.
+Recursively flatten each element that is an array.
+
 ```js
 const deepFlatten = arr => [].concat(...arr.map(v => (Array.isArray(v) ? deepFlatten(v) : v)));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 deepFlatten([1, [2], [[3], 4], 5]); // [1,2,3,4,5]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### difference
-
-Returns the difference between two arrays.
-
-Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values not contained in `b`.
-
+### difference
+
+Returns the difference between two arrays.
+
+Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values not contained in `b`.
+
 ```js
 const difference = (a, b) => {
   const s = new Set(b);
   return a.filter(x => !s.has(x));
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 difference([1, 2, 3], [1, 2, 4]); // [3]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### differenceWith
-
-Filters out all values from an array for which the comparator function does not return `true`.
-
-Use `Array.filter()` and `Array.findIndex()` to find the appropriate values.
-
-```js
-const differenceWith = (arr, val, comp) => arr.filter(a => val.findIndex(b => comp(a, b)) === -1);
-```
-
+### differenceWith
+
+Filters out all values from an array for which the comparator function does not return `true`.
+
+Use `Array.filter()` and `Array.findIndex()` to find the appropriate values.
+
+```js
+const differenceWith = (arr, val, comp) => arr.filter(a => val.findIndex(b => comp(a, b)) === -1);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-differenceWith([1, 1.2, 1.5, 3, 0], [1.9, 3, 0], (a, b) => Math.round(a) === Math.round(b)); // [1, 1.2]
-```
+```js
+differenceWith([1, 1.2, 1.5, 3, 0], [1.9, 3, 0], (a, b) => Math.round(a) === Math.round(b)); // [1, 1.2]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### distinctValuesOfArray
-
-Returns all the distinct values of an array.
-
-Use ES6 `Set` and the `...rest` operator to discard all duplicated values.
-
+### distinctValuesOfArray
+
+Returns all the distinct values of an array.
+
+Use ES6 `Set` and the `...rest` operator to discard all duplicated values.
+
 ```js
 const distinctValuesOfArray = arr => [...new Set(arr)];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 distinctValuesOfArray([1, 2, 2, 3, 4, 4, 5]); // [1,2,3,4,5]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### dropElements
-
-Removes elements in an array until the passed function returns `true`. Returns the remaining elements in the array.
-
-Loop through the array, using `Array.slice()` to drop the first element of the array until the returned value from the function is `true`.
-Returns the remaining elements.
-
+### dropElements
+
+Removes elements in an array until the passed function returns `true`. Returns the remaining elements in the array.
+
+Loop through the array, using `Array.slice()` to drop the first element of the array until the returned value from the function is `true`.
+Returns the remaining elements.
+
 ```js
 const dropElements = (arr, func) => {
   while (arr.length > 0 && !func(arr[0])) arr = arr.slice(1);
   return arr;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 dropElements([1, 2, 3, 4], n => n >= 3); // [3,4]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### dropRight
-
-Returns a new array with `n` elements removed from the right.
-
-Use `Array.slice()` to slice the remove the specified number of elements from the right.
-
+### dropRight
+
+Returns a new array with `n` elements removed from the right.
+
+Use `Array.slice()` to slice the remove the specified number of elements from the right.
+
 ```js
 const dropRight = (arr, n = 1) => arr.slice(0, -n);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -786,497 +711,497 @@ const dropRight = (arr, n = 1) => arr.slice(0, -n);
 dropRight([1, 2, 3]); // [1,2]
 dropRight([1, 2, 3], 2); // [1]
 dropRight([1, 2, 3], 42); // []
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### everyNth
-
-Returns every nth element in an array.
-
-Use `Array.filter()` to create a new array that contains every nth element of a given array.
-
+### everyNth
+
+Returns every nth element in an array.
+
+Use `Array.filter()` to create a new array that contains every nth element of a given array.
+
 ```js
 const everyNth = (arr, nth) => arr.filter((e, i) => i % nth === nth - 1);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 everyNth([1, 2, 3, 4, 5, 6], 2); // [ 2, 4, 6 ]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### filterNonUnique
-
-Filters out the non-unique values in an array.
-
-Use `Array.filter()` for an array containing only the unique values.
-
+### filterNonUnique
+
+Filters out the non-unique values in an array.
+
+Use `Array.filter()` for an array containing only the unique values.
+
 ```js
 const filterNonUnique = arr => arr.filter(i => arr.indexOf(i) === arr.lastIndexOf(i));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 filterNonUnique([1, 2, 2, 3, 4, 4, 5]); // [1,3,5]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### flatten
-
-Flattens an array.
-
-Use a new array and concatenate it with the spread input array causing a shallow denesting of any contained arrays.
-
+### flatten
+
+Flattens an array.
+
+Use a new array, `Array.concat()` and the spread operator (`...`) to cause a shallow denesting of any contained arrays.
+
 ```js
 const flatten = arr => [].concat(...arr);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 flatten([1, [2], 3, 4]); // [1,2,3,4]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### flattenDepth
-
-Flattens an array up to the specified depth.
-
-Use recursion, decrementing `depth` by 1 for each level of depth.
-Use `Array.reduce()` and `Array.concat()` to merge elements or arrays.
-Base case, for `depth` equal to `1` stops recursion.
-Omit the second element, `depth` to flatten only to a depth of `1` (single flatten).
-
+### flattenDepth
+
+Flattens an array up to the specified depth.
+
+Use recursion, decrementing `depth` by 1 for each level of depth.
+Use `Array.reduce()` and `Array.concat()` to merge elements or arrays.
+Base case, for `depth` equal to `1` stops recursion.
+Omit the second element, `depth` to flatten only to a depth of `1` (single flatten).
+
 ```js
 const flattenDepth = (arr, depth = 1) =>
   depth != 1
     ? arr.reduce((a, v) => a.concat(Array.isArray(v) ? flattenDepth(v, depth - 1) : v), [])
     : arr.reduce((a, v) => a.concat(v), []);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 flattenDepth([1, [2], 3, 4]); // [1,2,3,4]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### groupBy
-
-Groups the elements of an array based on the given function.
-
-Use `Array.map()` to map the values of an array to a function or property name.
-Use `Array.reduce()` to create an object, where the keys are produced from the mapped results.
-
+### groupBy
+
+Groups the elements of an array based on the given function.
+
+Use `Array.map()` to map the values of an array to a function or property name.
+Use `Array.reduce()` to create an object, where the keys are produced from the mapped results.
+
 ```js
 const groupBy = (arr, func) =>
   arr.map(typeof func === 'function' ? func : val => val[func]).reduce((acc, val, i) => {
     acc[val] = (acc[val] || []).concat(arr[i]);
     return acc;
   }, {});
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 groupBy([6.1, 4.2, 6.3], Math.floor); // {4: [4.2], 6: [6.1, 6.3]}
 groupBy(['one', 'two', 'three'], 'length'); // {3: ['one', 'two'], 5: ['three']}
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### head
-
-Returns the head of a list.
-
-Use `arr[0]` to return the first element of the passed array.
-
+### head
+
+Returns the head of a list.
+
+Use `arr[0]` to return the first element of the passed array.
+
 ```js
 const head = arr => arr[0];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 head([1, 2, 3]); // 1
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### initial
-
-Returns all the elements of an array except the last one.
-
-Use `arr.slice(0,-1)` to return all but the last element of the array.
-
+### initial
+
+Returns all the elements of an array except the last one.
+
+Use `arr.slice(0,-1)` to return all but the last element of the array.
+
 ```js
 const initial = arr => arr.slice(0, -1);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 initial([1, 2, 3]); // [1,2]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### initialize2DArray
-
-Initializes a 2D array of given width and height and value.
-
-Use `Array.map()` to generate h rows where each is a new array of size w initialize with value. If the value is not provided, default to `null`.
-
+### initialize2DArray
+
+Initializes a 2D array of given width and height and value.
+
+Use `Array.map()` to generate h rows where each is a new array of size w initialize with value. If the value is not provided, default to `null`.
+
 ```js
 const initialize2DArray = (w, h, val = null) =>
   Array(h)
     .fill()
     .map(() => Array(w).fill(val));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 initialize2DArray(2, 2, 0); // [[0,0], [0,0]]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### initializeArrayWithRange
-
-Initializes an array containing the numbers in the specified range where `start` and `end` are inclusive with there common difference `step`.
-
-Use `Array.from(Math.ceil((end+1-start)/step))` to create an array of the desired length(the amounts of elements is equal to `(end-start)/step` or `(end+1-start)/step` for inclusive end), `Array.map()` to fill with the desired values in a range.
-You can omit `start` to use a default value of `0`.
-You can omit `step` to use a default value of `1`.
-
-```js
-const initializeArrayWithRange = (end, start = 0, step = 1) =>
-  Array.from({ length: Math.ceil((end + 1 - start) / step) }).map((v, i) => i * step + start);
-```
-
+### initializeArrayWithRange
+
+Initializes an array containing the numbers in the specified range where `start` and `end` are inclusive with there common difference `step`.
+
+Use `Array.from(Math.ceil((end+1-start)/step))` to create an array of the desired length(the amounts of elements is equal to `(end-start)/step` or `(end+1-start)/step` for inclusive end), `Array.map()` to fill with the desired values in a range.
+You can omit `start` to use a default value of `0`.
+You can omit `step` to use a default value of `1`.
+
+```js
+const initializeArrayWithRange = (end, start = 0, step = 1) =>
+  Array.from({ length: Math.ceil((end + 1 - start) / step) }).map((v, i) => i * step + start);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-initializeArrayWithRange(5); // [0,1,2,3,4,5]
-initializeArrayWithRange(7, 3); // [3,4,5,6,7]
-initializeArrayWithRange(9, 0, 2); // [0,2,4,6,8]
-```
+```js
+initializeArrayWithRange(5); // [0,1,2,3,4,5]
+initializeArrayWithRange(7, 3); // [3,4,5,6,7]
+initializeArrayWithRange(9, 0, 2); // [0,2,4,6,8]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### initializeArrayWithValues
-
-Initializes and fills an array with the specified values.
-
-Use `Array(n)` to create an array of the desired length, `fill(v)` to fill it with the desired values.
-You can omit `value` to use a default value of `0`.
-
+### initializeArrayWithValues
+
+Initializes and fills an array with the specified values.
+
+Use `Array(n)` to create an array of the desired length, `fill(v)` to fill it with the desired values.
+You can omit `val` to use a default value of `0`.
+
 ```js
-const initializeArrayWithValues = (n, value = 0) => Array(n).fill(value);
-```
-
+const initializeArrayWithValues = (n, val = 0) => Array(n).fill(val);
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 initializeArrayWithValues(5, 2); // [2,2,2,2,2]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### intersection
-
-Returns a list of elements that exist in both arrays.
-
-Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values contained in `b`.
-
+### intersection
+
+Returns a list of elements that exist in both arrays.
+
+Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values contained in `b`.
+
 ```js
 const intersection = (a, b) => {
   const s = new Set(b);
   return a.filter(x => s.has(x));
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 intersection([1, 2, 3], [4, 3, 2]); // [2,3]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isSorted
-
-Returns `1` if the array is sorted in ascending order, `-1` if it is sorted in descending order or `0` if it is not sorted.
-
-Calculate the ordering `direction` for the first two elements.
-Use `Object.entries()` to loop over array objects and compare them in pairs.
-Return `0` if the `direction` changes or the `direction` if the last element is reached.
-
-```js
-const isSorted = arr => {
-  const direction = arr[0] > arr[1] ? -1 : 1;
-  for (let [i, val] of arr.entries())
-    if (i === arr.length - 1) return direction;
-    else if ((val - arr[i + 1]) * direction > 0) return 0;
-};
-```
-
+### isSorted
+
+Returns `1` if the array is sorted in ascending order, `-1` if it is sorted in descending order or `0` if it is not sorted.
+
+Calculate the ordering `direction` for the first two elements.
+Use `Object.entries()` to loop over array objects and compare them in pairs.
+Return `0` if the `direction` changes or the `direction` if the last element is reached.
+
+```js
+const isSorted = arr => {
+  const direction = arr[0] > arr[1] ? -1 : 1;
+  for (let [i, val] of arr.entries())
+    if (i === arr.length - 1) return direction;
+    else if ((val - arr[i + 1]) * direction > 0) return 0;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isSorted([0, 1, 2, 2]); // 1
-isSorted([4, 3, 2]); // -1
-isSorted([4, 3, 5]); // 0
-```
+```js
+isSorted([0, 1, 2, 2]); // 1
+isSorted([4, 3, 2]); // -1
+isSorted([4, 3, 5]); // 0
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### join
-
-Joins all elements of an array into a string and returns this string. Uses a separator and an end separator.
-
-Use `Array.reduce()` to combine elements into a string.
-Omit the second argument, `separator`, to use a default separator of `','`.
-Omit the third argument, `end`, to use the same value as `separator` by default.
-
-```js
-const join = (arr, separator = ',', end = separator) =>
-  arr.reduce(
-    (acc, val, i) =>
-      i == arr.length - 2
-        ? acc + val + end
-        : i == arr.length - 1 ? acc + val : acc + val + separator,
-    ''
-  );
-```
-
+### join
+
+Joins all elements of an array into a string and returns this string. Uses a separator and an end separator.
+
+Use `Array.reduce()` to combine elements into a string.
+Omit the second argument, `separator`, to use a default separator of `','`.
+Omit the third argument, `end`, to use the same value as `separator` by default.
+
+```js
+const join = (arr, separator = ',', end = separator) =>
+  arr.reduce(
+    (acc, val, i) =>
+      i == arr.length - 2
+        ? acc + val + end
+        : i == arr.length - 1 ? acc + val : acc + val + separator,
+    ''
+  );
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-join(['pen', 'pineapple', 'apple', 'pen'], ',', '&'); // "pen,pineapple,apple&pen"
-join(['pen', 'pineapple', 'apple', 'pen'], ','); // "pen,pineapple,apple,pen"
-join(['pen', 'pineapple', 'apple', 'pen']); // "pen,pineapple,apple,pen"
-```
+```js
+join(['pen', 'pineapple', 'apple', 'pen'], ',', '&'); // "pen,pineapple,apple&pen"
+join(['pen', 'pineapple', 'apple', 'pen'], ','); // "pen,pineapple,apple,pen"
+join(['pen', 'pineapple', 'apple', 'pen']); // "pen,pineapple,apple,pen"
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### last
-
-Returns the last element in an array.
-
-Use `arr.length - 1` to compute the index of the last element of the given array and returning it.
-
+### last
+
+Returns the last element in an array.
+
+Use `arr.length - 1` to compute the index of the last element of the given array and returning it.
+
 ```js
 const last = arr => arr[arr.length - 1];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 last([1, 2, 3]); // 3
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### mapObject
-
-Maps the values of an array to an object using a function, where the key-value pairs consist of the original value as the key and the mapped value.
-
-Use an anonymous inner function scope to declare an undefined memory space, using closures to store a return value. Use a new `Array` to store the array with a map of the function over its data set and a comma operator to return a second step, without needing to move from one context to another (due to closures and order of operations).
-
+### mapObject
+
+Maps the values of an array to an object using a function, where the key-value pairs consist of the original value as the key and the mapped value.
+
+Use an anonymous inner function scope to declare an undefined memory space, using closures to store a return value. Use a new `Array` to store the array with a map of the function over its data set and a comma operator to return a second step, without needing to move from one context to another (due to closures and order of operations).
+
 ```js
 const mapObject = (arr, fn) =>
   (a => (
     (a = [arr, arr.map(fn)]), a[0].reduce((acc, val, ind) => ((acc[val] = a[1][ind]), acc), {})
   ))();
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const squareIt = arr => mapObject(arr, a => a * a);
 squareIt([1, 2, 3]); // { 1: 1, 2: 4, 3: 9 }
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### maxN
-
-Returns the `n` maximum elements from the provided array. If `n` is greater than or equal to the provided array's length, then return the original array(sorted in descending order).
-
-Use `Array.sort()` combined with the spread operator (`...`) to create a shallow clone of the array and sort it in descending order.
-Use `Array.slice()` to get the specified number of elements.
-Omit the second argument, `n`, to get a one-element array.
-
-```js
-const maxN = (arr, n = 1) => [...arr].sort((a, b) => b - a).slice(0, n);
-```
-
+### maxN
+
+Returns the `n` maximum elements from the provided array. If `n` is greater than or equal to the provided array's length, then return the original array(sorted in descending order).
+
+Use `Array.sort()` combined with the spread operator (`...`) to create a shallow clone of the array and sort it in descending order.
+Use `Array.slice()` to get the specified number of elements.
+Omit the second argument, `n`, to get a one-element array.
+
+```js
+const maxN = (arr, n = 1) => [...arr].sort((a, b) => b - a).slice(0, n);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-maxN([1, 2, 3]); // [3]
-maxN([1, 2, 3], 2); // [3,2]
-```
+```js
+maxN([1, 2, 3]); // [3]
+maxN([1, 2, 3], 2); // [3,2]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### minN
-
-Returns the `n` minimum elements from the provided array. If `n` is greater than or equal to the provided array's length, then return the original array(sorted in ascending order).
-
-Use `Array.sort()` combined with the spread operator (`...`) to create a shallow clone of the array and sort it in ascending order.
-Use `Array.slice()` to get the specified number of elements.
-Omit the second argument, `n`, to get a one-element array.
-
-```js
-const minN = (arr, n = 1) => [...arr].sort((a, b) => a - b).slice(0, n);
-```
+### minN
+
+Returns the `n` minimum elements from the provided array. If `n` is greater than or equal to the provided array's length, then return the original array(sorted in ascending order).
+
+Use `Array.sort()` combined with the spread operator (`...`) to create a shallow clone of the array and sort it in ascending order.
+Use `Array.slice()` to get the specified number of elements.
+Omit the second argument, `n`, to get a one-element array.
+
+```js
+const minN = (arr, n = 1) => [...arr].sort((a, b) => a - b).slice(0, n);
+```
 <details>
 <summary>Examples</summary>
 
-```js
-minN([1, 2, 3]); // [1]
-minN([1, 2, 3], 2); // [1,2]
-```
+```js
+minN([1, 2, 3]); // [1]
+minN([1, 2, 3], 2); // [1,2]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### nthElement
-
-Returns the nth element of an array.
-
-Use `Array.slice()` to get an array containing the nth element at the first place.
-If the index is out of bounds, return `[]`.
-Omit the second argument, `n`, to get the first element of the array.
-
+### nthElement
+
+Returns the nth element of an array.
+
+Use `Array.slice()` to get an array containing the nth element at the first place.
+If the index is out of bounds, return `[]`.
+Omit the second argument, `n`, to get the first element of the array.
+
 ```js
 const nthElement = (arr, n = 0) => (n > 0 ? arr.slice(n, n + 1) : arr.slice(n))[0];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 nthElement(['a', 'b', 'c'], 1); // 'b'
 nthElement(['a', 'b', 'b'], -3); // 'a'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### pick
-
-Picks the key-value pairs corresponding to the given keys from an object.
-
-Use `Array.reduce()` to convert the filtered/picked keys back to an object with the corresponding key-value pair if the key exists in the obj.
-
+### pick
+
+Picks the key-value pairs corresponding to the given keys from an object.
+
+Use `Array.reduce()` to convert the filtered/picked keys back to an object with the corresponding key-value pair if the key exists in the obj.
+
 ```js
 const pick = (obj, arr) =>
   arr.reduce((acc, curr) => (curr in obj && (acc[curr] = obj[curr]), acc), {});
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 pick({ a: 1, b: '2', c: 3 }, ['a', 'c']); // { 'a': 1, 'c': 3 }
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### pull
-
-Mutates the original array to filter out the values specified.
-
-Use `Array.filter()` and `Array.includes()` to pull out the values that are not needed.
-Use `Array.length = 0` to mutate the passed in an array by resetting it's length to zero and `Array.push()` to re-populate it with only the pulled values.
-
-_(For a snippet that does not mutate the original array see [`without`](#without))_
-
+### pull
+
+Mutates the original array to filter out the values specified.
+
+Use `Array.filter()` and `Array.includes()` to pull out the values that are not needed.
+Use `Array.length = 0` to mutate the passed in an array by resetting it's length to zero and `Array.push()` to re-populate it with only the pulled values.
+
+_(For a snippet that does not mutate the original array see [`without`](#without))_
+
 ```js
 const pull = (arr, ...args) => {
   let argState = Array.isArray(args[0]) ? args[0] : args;
@@ -1284,29 +1209,29 @@ const pull = (arr, ...args) => {
   arr.length = 0;
   pulled.forEach(v => arr.push(v));
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 let myArray = ['a', 'b', 'c', 'a', 'b', 'c'];
 pull(myArray, 'a', 'c'); // myArray = [ 'b', 'b' ]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### pullAtIndex
-
-Mutates the original array to filter out the values at the specified indexes.
-
-Use `Array.filter()` and `Array.includes()` to pull out the values that are not needed.
-Use `Array.length = 0` to mutate the passed in an array by resetting it's length to zero and `Array.push()` to re-populate it with only the pulled values.
-Use `Array.push()` to keep track of pulled values
-
+### pullAtIndex
+
+Mutates the original array to filter out the values at the specified indexes.
+
+Use `Array.filter()` and `Array.includes()` to pull out the values that are not needed.
+Use `Array.length = 0` to mutate the passed in an array by resetting it's length to zero and `Array.push()` to re-populate it with only the pulled values.
+Use `Array.push()` to keep track of pulled values
+
 ```js
 const pullAtIndex = (arr, pullArr) => {
   let removed = [];
@@ -1317,29 +1242,29 @@ const pullAtIndex = (arr, pullArr) => {
   pulled.forEach(v => arr.push(v));
   return removed;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 let myArray = ['a', 'b', 'c', 'd'];
 let pulled = pullAtIndex(myArray, [1, 3]); // myArray = [ 'a', 'c' ] , pulled = [ 'b', 'd' ]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### pullAtValue
-
-Mutates the original array to filter out the values specified. Returns the removed elements.
-
-Use `Array.filter()` and `Array.includes()` to pull out the values that are not needed.
-Use `Array.length = 0` to mutate the passed in an array by resetting it's length to zero and `Array.push()` to re-populate it with only the pulled values.
-Use `Array.push()` to keep track of pulled values
-
+### pullAtValue
+
+Mutates the original array to filter out the values specified. Returns the removed elements.
+
+Use `Array.filter()` and `Array.includes()` to pull out the values that are not needed.
+Use `Array.length = 0` to mutate the passed in an array by resetting it's length to zero and `Array.push()` to re-populate it with only the pulled values.
+Use `Array.push()` to keep track of pulled values
+
 ```js
 const pullAtValue = (arr, pullArr) => {
   let removed = [],
@@ -1349,102 +1274,70 @@ const pullAtValue = (arr, pullArr) => {
   mutateTo.forEach(v => arr.push(v));
   return removed;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 let myArray = ['a', 'b', 'c', 'd'];
 let pulled = pullAtValue(myArray, ['b', 'd']); // myArray = [ 'a', 'c' ] , pulled = [ 'b', 'd' ]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### quickSort
-
-QuickSort an Array (ascending sort by default).
-
-Use recursion. 
-Use `Array.filter` and spread operator (`...`) to create an array that all elements with values less than the pivot come before the pivot, and all elements with values greater than the pivot come after it. 
-If the parameter `desc` is truthy, return array sorts in descending order.
-
+### reducedFilter
+
+Filter an array of objects based on a condition while also filtering out unspecified keys.
+
+Use `Array.filter()` to filter the array based on the predicate `fn` so that it returns the objects for which the condition returned a truthy value. 
+On the filtered array, use `Array.map()` to return the new object using `Array.reduce()` to filter out the keys which were not supplied as the `keys` argument.
+
 ```js
-const quickSort = ([n, ...nums], desc) =>
-  isNaN(n)
-    ? []
-    : [
-        ...quickSort(nums.filter(v => (desc ? v > n : v <= n)), desc),
-        n,
-        ...quickSort(nums.filter(v => (!desc ? v > n : v <= n)), desc)
-      ];
-```
-
+const reducedFilter = (data, keys, fn) =>
+  data.filter(fn).map(el =>
+    keys.reduce((acc, key) => {
+      acc[key] = el[key];
+      return acc;
+    }, {})
+  );
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
-quickSort([4, 1, 3, 2]); // [1,2,3,4]
-quickSort([4, 1, 3, 2], true); // [4,3,2,1]
-```
+const data = [
+  {
+    id: 1,
+    name: 'john',
+    age: 24
+  },
+  {
+    id: 2,
+    name: 'mike',
+    age: 50
+  }
+];
+
+reducedFilter(data, ['id', 'name'], item => item.age > 24); // [{ id: 2, name: 'mike'}]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### reducedFilter
-
-Filter an array of objects based on a condition while also filtering out unspecified keys.
-
-Use `Array.filter()` to filter the array based on the predicate `fn` so that it returns the objects for which the condition returned a truthy value. 
-On the filtered array, use `Array.map()` to return the new object using `Array.reduce()` to filter out the keys which were not supplied as the `keys` argument.
-
-```js
-const reducedFilter = (data, keys, fn) =>
-  data.filter(fn).map(el =>
-    keys.reduce((acc, key) => {
-      acc[key] = el[key];
-      return acc;
-    }, {})
-  );
-```
-
-<details>
-<summary>Examples</summary>
+### remove
 
-```js
-const data = [
-  {
-    id: 1,
-    name: 'john',
-    age: 24
-  },
-  {
-    id: 2,
-    name: 'mike',
-    age: 50
-  }
-];
-
-reducedFilter(data, ['id', 'name'], item => item.age > 24); // [{ id: 2, name: 'mike'}]
-```
+Removes elements from an array for which the given function returns `false`.
 
-</details>
+Use `Array.filter()` to find array elements that return truthy values and `Array.reduce()` to remove elements using `Array.splice()`.
+The `func` is invoked with three arguments (`value, index, array`).
 
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### remove
-
-Removes elements from an array for which the given function returns `false`.
-
-Use `Array.filter()` to find array elements that return truthy values and `Array.reduce()` to remove elements using `Array.splice()`.
-The `func` is invoked with three arguments (`value, index, array`).
-
 ```js
 const remove = (arr, func) =>
   Array.isArray(arr)
@@ -1453,304 +1346,304 @@ const remove = (arr, func) =>
         return acc.concat(val);
       }, [])
     : [];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 remove([1, 2, 3, 4], n => n % 2 == 0); // [2, 4]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sample
-
-Returns a random element from an array.
-
-Use `Math.random()` to generate a random number, multiply it by `length` and round it of to the nearest whole number using `Math.floor()`.
-This method also works with strings.
-
+### sample
+
+Returns a random element from an array.
+
+Use `Math.random()` to generate a random number, multiply it by `length` and round it of to the nearest whole number using `Math.floor()`.
+This method also works with strings.
+
 ```js
 const sample = arr => arr[Math.floor(Math.random() * arr.length)];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 sample([3, 7, 9, 11]); // 9
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sampleSize
-
-Gets `n` random elements at unique keys from `array` up to the size of `array`.
-
-Shuffle the array using the [Fisher-Yates algorithm](https://github.com/chalarangelo/30-seconds-of-code#shuffle).
-Use `Array.slice()` to get the first `n` elements.
-Omit the second argument, `n` to get only one element at random from the array.
-
-```js
-const sampleSize = ([...arr], n = 1) => {
-  let m = arr.length;
-  while (m) {
-    const i = Math.floor(Math.random() * m--);
-    [arr[m], arr[i]] = [arr[i], arr[m]];
-  }
-  return arr.slice(0, n);
-};
-```
-
+### sampleSize
+
+Gets `n` random elements at unique keys from `array` up to the size of `array`.
+
+Shuffle the array using the [Fisher-Yates algorithm](https://github.com/chalarangelo/30-seconds-of-code#shuffle).
+Use `Array.slice()` to get the first `n` elements.
+Omit the second argument, `n` to get only one element at random from the array.
+
+```js
+const sampleSize = ([...arr], n = 1) => {
+  let m = arr.length;
+  while (m) {
+    const i = Math.floor(Math.random() * m--);
+    [arr[m], arr[i]] = [arr[i], arr[m]];
+  }
+  return arr.slice(0, n);
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-sampleSize([1, 2, 3], 2); // [3,1]
-sampleSize([1, 2, 3], 4); // [2,3,1]
-```
+```js
+sampleSize([1, 2, 3], 2); // [3,1]
+sampleSize([1, 2, 3], 4); // [2,3,1]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### shuffle
-
-Randomizes the order of the values of an array, returning a new array.
-
-Uses the Fisher-Yates algorithm to reorder the elements of the array, based on the [Lodash implementation](https://github.com/lodash/lodash/blob/b2ea6b1cd251796dcb5f9700c4911a7b6223920b/shuffle.js), but as a pure function.
-
-```js
-const shuffle = ([...arr]) => {
-  let m = arr.length;
-  while (m) {
-    const i = Math.floor(Math.random() * m--);
-    [arr[m], arr[i]] = [arr[i], arr[m]];
-  }
-  return arr;
-};
-```
-
+### shuffle
+
+Randomizes the order of the values of an array, returning a new array.
+
+Uses the [Fisher-Yates algorithm](https://github.com/chalarangelo/30-seconds-of-code#shuffle) to reorder the elements of the array.
+
+```js
+const shuffle = ([...arr]) => {
+  let m = arr.length;
+  while (m) {
+    const i = Math.floor(Math.random() * m--);
+    [arr[m], arr[i]] = [arr[i], arr[m]];
+  }
+  return arr;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-const foo = [1, 2, 3];
-shuffle(foo); // [2,3,1], foo = [1,2,3]
-```
+```js
+const foo = [1, 2, 3];
+shuffle(foo); // [2,3,1], foo = [1,2,3]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### similarity
-
-Returns an array of elements that appear in both arrays.
-
-Use `filter()` to remove values that are not part of `values`, determined using `includes()`.
-
+### similarity
+
+Returns an array of elements that appear in both arrays.
+
+Use `Array.filter()` to remove values that are not part of `values`, determined using `Array.includes()`.
+
 ```js
 const similarity = (arr, values) => arr.filter(v => values.includes(v));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 similarity([1, 2, 3], [1, 2, 4]); // [1,2]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sortedIndex
-
-Returns the lowest index at which value should be inserted into array in order to maintain its sort order.
-
-Check if the array is sorted in descending order (loosely).
-Use `Array.findIndex()` to find the appropriate index where the element should be inserted.
-
-```js
-const sortedIndex = (arr, n) => {
-  const isDescending = arr[0] > arr[arr.length - 1];
-  const index = arr.findIndex(el => (isDescending ? n >= el : n <= el));
-  return index === -1 ? arr.length : index;
-};
-```
-
+### sortedIndex
+
+Returns the lowest index at which value should be inserted into array in order to maintain its sort order.
+
+Check if the array is sorted in descending order (loosely).
+Use `Array.findIndex()` to find the appropriate index where the element should be inserted.
+
+```js
+const sortedIndex = (arr, n) => {
+  const isDescending = arr[0] > arr[arr.length - 1];
+  const index = arr.findIndex(el => (isDescending ? n >= el : n <= el));
+  return index === -1 ? arr.length : index;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-sortedIndex([5, 3, 2, 1], 4); // 1
-sortedIndex([30, 50], 40); // 1
-```
+```js
+sortedIndex([5, 3, 2, 1], 4); // 1
+sortedIndex([30, 50], 40); // 1
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### symmetricDifference
-
-Returns the symmetric difference between two arrays.
-
-Create a `Set` from each array, then use `Array.filter()` on each of them to only keep values not contained in the other.
-
+### symmetricDifference
+
+Returns the symmetric difference between two arrays.
+
+Create a `Set` from each array, then use `Array.filter()` on each of them to only keep values not contained in the other.
+
 ```js
 const symmetricDifference = (a, b) => {
   const sA = new Set(a),
     sB = new Set(b);
   return [...a.filter(x => !sB.has(x)), ...b.filter(x => !sA.has(x))];
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 symmetricDifference([1, 2, 3], [1, 2, 4]); // [3,4]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### tail
-
-Returns all elements in an array except for the first one.
-
-Return `arr.slice(1)` if the array's `length` is more than `1`, otherwise, return the whole array.
-
+### tail
+
+Returns all elements in an array except for the first one.
+
+Return `Array.slice(1)` if the array's `length` is more than `1`, otherwise, return the whole array.
+
 ```js
 const tail = arr => (arr.length > 1 ? arr.slice(1) : arr);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 tail([1, 2, 3]); // [2,3]
 tail([1]); // [1]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### take
-
-Returns an array with n elements removed from the beginning.
-
-Use `Array.slice()` to create a slice of the array with `n` elements taken from the beginning.
-
+### take
+
+Returns an array with n elements removed from the beginning.
+
+Use `Array.slice()` to create a slice of the array with `n` elements taken from the beginning.
+
 ```js
 const take = (arr, n = 1) => arr.slice(0, n);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 take([1, 2, 3], 5); // [1, 2, 3]
 take([1, 2, 3], 0); // []
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### takeRight
-
-Returns an array with n elements removed from the end.
-
-Use `Array.slice()` to create a slice of the array with `n` elements taken from the end.
-
+### takeRight
+
+Returns an array with n elements removed from the end.
+
+Use `Array.slice()` to create a slice of the array with `n` elements taken from the end.
+
 ```js
 const takeRight = (arr, n = 1) => arr.slice(arr.length - n, arr.length);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 takeRight([1, 2, 3], 2); // [ 2, 3 ]
 takeRight([1, 2, 3]); // [3]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### union
-
-Returns every element that exists in any of the two arrays once.
-
-Create a `Set` with all values of `a` and `b` and convert to an array.
-
+### union
+
+Returns every element that exists in any of the two arrays once.
+
+Create a `Set` with all values of `a` and `b` and convert to an array.
+
 ```js
 const union = (a, b) => Array.from(new Set([...a, ...b]));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 union([1, 2, 3], [4, 3, 2]); // [1,2,3,4]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### without
-
-Filters out the elements of an array, that have one of the specified values.
-
-Use `Array.filter()` to create an array excluding(using `!Array.includes()`) all given values.
-
-_(For a snippet that mutates the original array see [`pull`](#pull))_
-
+### without
+
+Filters out the elements of an array, that have one of the specified values.
+
+Use `Array.filter()` to create an array excluding(using `!Array.includes()`) all given values.
+
+_(For a snippet that mutates the original array see [`pull`](#pull))_
+
 ```js
 const without = (arr, ...args) => arr.filter(v => !args.includes(v));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 without([2, 1, 2, 3], 1, 2); // [3]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### zip
-
-Creates an array of elements, grouped based on the position in the original arrays.
-
-Use `Math.max.apply()` to get the longest array in the arguments.
-Creates an array with that length as return value and use `Array.from()` with a map-function to create an array of grouped elements.
-If lengths of the argument-arrays vary, `undefined` is used where no value could be found.
-
+### zip
+
+Creates an array of elements, grouped based on the position in the original arrays.
+
+Use `Math.max.apply()` to get the longest array in the arguments.
+Creates an array with that length as return value and use `Array.from()` with a map-function to create an array of grouped elements.
+If lengths of the argument-arrays vary, `undefined` is used where no value could be found.
+
 ```js
 const zip = (...arrays) => {
   const maxLength = Math.max(...arrays.map(x => x.length));
@@ -1758,39 +1651,39 @@ const zip = (...arrays) => {
     return Array.from({ length: arrays.length }, (_, k) => arrays[k][i]);
   });
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 zip(['a', 'b'], [1, 2], [true, false]); // [['a', 1, true], ['b', 2, false]]
 zip(['a'], [1, 2], [true, false]); // [['a', 1, true], [undefined, 2, false]]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### zipObject
-
-Given an array of valid property identifiers and an array of values, return an object associating the properties to the values.
-
-Since an object can have undefined values but not undefined property pointers, the array of properties is used to decide the structure of the resulting object using `Array.reduce()`.
-
+### zipObject
+
+Given an array of valid property identifiers and an array of values, return an object associating the properties to the values.
+
+Since an object can have undefined values but not undefined property pointers, the array of properties is used to decide the structure of the resulting object using `Array.reduce()`.
+
 ```js
 const zipObject = (props, values) =>
   props.reduce((obj, prop, index) => ((obj[prop] = values[index]), obj), {});
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 zipObject(['a', 'b', 'c'], [1, 2]); // {a: 1, b: 2, c: undefined}
 zipObject(['a', 'b'], [1, 2, 3]); // {a: 1, b: 2}
-```
+```
 
 </details>
 
@@ -1799,7 +1692,7 @@ zipObject(['a', 'b'], [1, 2, 3]); // {a: 1, b: 2}
 ---
  ## 🌐 Browser
 
-### arrayToHtmlList ![advanced](/advanced.svg)
+### arrayToHtmlList
 
 Converts the given array elements into `<li>` tags and appends them to the list of the given id.
 
@@ -1822,128 +1715,128 @@ arrayToHtmlList(['item 1', 'item 2'], 'myListID');
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### bottomVisible
-
-Returns `true` if the bottom of the page is visible, `false` otherwise.
-
-Use `scrollY`, `scrollHeight` and `clientHeight` to determine if the bottom of the page is visible.
-
+### bottomVisible
+
+Returns `true` if the bottom of the page is visible, `false` otherwise.
+
+Use `scrollY`, `scrollHeight` and `clientHeight` to determine if the bottom of the page is visible.
+
 ```js
 const bottomVisible = () =>
   document.documentElement.clientHeight + window.scrollY >=
   (document.documentElement.scrollHeight || document.documentElement.clientHeight);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 bottomVisible(); // true
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### copyToClipboard
-
-Copy a string to the clipboard. Only works as a result of user action (i.e. inside a `click` event listener).
-
-Create a new `<textarea>` element, fill it with the supplied data and add it to the HTML document.
-Use `Selection.getRangeAt()`to store the selected range (if any).
-Use `document.execCommand('copy')` to copy to the clipboard.
-Remove the `<textarea>` element from the HTML document.
-Finally, use `Selection().addRange()` to recover the original selected range (if any).
-
-```js
-const copyToClipboard = str => {
-  const el = document.createElement('textarea');
-  el.value = str;
-  el.setAttribute('readonly', '');
-  el.style.position = 'absolute';
-  el.style.left = '-9999px';
-  document.body.appendChild(el);
-  const selected =
-    document.getSelection().rangeCount > 0 ? document.getSelection().getRangeAt(0) : false;
-  el.select();
-  document.execCommand('copy');
-  document.body.removeChild(el);
-  if (selected) {
-    document.getSelection().removeAllRanges();
-    document.getSelection().addRange(selected);
-  }
-};
-```
-
+### copyToClipboard ![advanced](/advanced.svg)
+
+Copy a string to the clipboard. Only works as a result of user action (i.e. inside a `click` event listener).
+
+Create a new `<textarea>` element, fill it with the supplied data and add it to the HTML document.
+Use `Selection.getRangeAt()`to store the selected range (if any).
+Use `document.execCommand('copy')` to copy to the clipboard.
+Remove the `<textarea>` element from the HTML document.
+Finally, use `Selection().addRange()` to recover the original selected range (if any).
+
+```js
+const copyToClipboard = str => {
+  const el = document.createElement('textarea');
+  el.value = str;
+  el.setAttribute('readonly', '');
+  el.style.position = 'absolute';
+  el.style.left = '-9999px';
+  document.body.appendChild(el);
+  const selected =
+    document.getSelection().rangeCount > 0 ? document.getSelection().getRangeAt(0) : false;
+  el.select();
+  document.execCommand('copy');
+  document.body.removeChild(el);
+  if (selected) {
+    document.getSelection().removeAllRanges();
+    document.getSelection().addRange(selected);
+  }
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-copyToClipboard('Lorem ipsum'); // 'Lorem ipsum' copied to clipboard.
-```
+```js
+copyToClipboard('Lorem ipsum'); // 'Lorem ipsum' copied to clipboard.
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### currentURL
-
-Returns the current URL.
-
-Use `window.location.href` to get current URL.
-
+### currentURL
+
+Returns the current URL.
+
+Use `window.location.href` to get current URL.
+
 ```js
 const currentURL = () => window.location.href;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 currentURL(); // 'https://google.com'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### detectDeviceType
-
-Detects wether the website is being opened in a mobile device or a desktop/laptop.
-
-Use a regular expression to test the `navigator.userAgent` property to figure out if the device is a mobile device or a desktop/laptop.
-
+### detectDeviceType
+
+Detects wether the website is being opened in a mobile device or a desktop/laptop.
+
+Use a regular expression to test the `navigator.userAgent` property to figure out if the device is a mobile device or a desktop/laptop.
+
 ```js
 const detectDeviceType = () =>
   /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)
     ? 'Mobile'
     : 'Desktop';
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 detectDeviceType(); // "Mobile" or "Desktop"
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### elementIsVisibleInViewport
-
-Returns `true` if the element specified is visible in the viewport, `false` otherwise.
-
-Use `Element.getBoundingClientRect()` and the `window.inner(Width|Height)` values
-to determine if a given element is visible in the viewport.
-Omit the second argument to determine if the element is entirely visible, or specify `true` to determine if
-it is partially visible.
-
+### elementIsVisibleInViewport
+
+Returns `true` if the element specified is visible in the viewport, `false` otherwise.
+
+Use `Element.getBoundingClientRect()` and the `window.inner(Width|Height)` values
+to determine if a given element is visible in the viewport.
+Omit the second argument to determine if the element is entirely visible, or specify `true` to determine if
+it is partially visible.
+
 ```js
 const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
   const { top, left, bottom, right } = el.getBoundingClientRect();
@@ -1953,8 +1846,8 @@ const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
         ((left > 0 && left < innerWidth) || (right > 0 && right < innerWidth))
     : top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -1962,137 +1855,137 @@ const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
 // e.g. 100x100 viewport and a 10x10px element at position {top: -1, left: 0, bottom: 9, right: 10}
 elementIsVisibleInViewport(el); // false - (not fully visible)
 elementIsVisibleInViewport(el, true); // true - (partially visible)
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### getScrollPosition
-
-Returns the scroll position of the current page.
-
-Use `pageXOffset` and `pageYOffset` if they are defined, otherwise `scrollLeft` and `scrollTop`.
-You can omit `el` to use a default value of `window`.
-
+### getScrollPosition
+
+Returns the scroll position of the current page.
+
+Use `pageXOffset` and `pageYOffset` if they are defined, otherwise `scrollLeft` and `scrollTop`.
+You can omit `el` to use a default value of `window`.
+
 ```js
 const getScrollPosition = (el = window) => ({
   x: el.pageXOffset !== undefined ? el.pageXOffset : el.scrollLeft,
   y: el.pageYOffset !== undefined ? el.pageYOffset : el.scrollTop
 });
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 getScrollPosition(); // {x: 0, y: 200}
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### getStyle
-
-Returns the value of a CSS rule for the specified element.
-
-Use `Window.getComputedStyle()` to get the value of the CSS rule for the specified element.
-
+### getStyle
+
+Returns the value of a CSS rule for the specified element.
+
+Use `Window.getComputedStyle()` to get the value of the CSS rule for the specified element.
+
 ```js
 const getStyle = (el, ruleName) => getComputedStyle(el)[ruleName];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 getStyle(document.querySelector('p'), 'font-size'); // '16px'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### hasClass
-
-Returns `true` if the element has the specified class, `false` otherwise.
-
-Use `element.classList.contains()` to check if the element has the specified class.
-
+### hasClass
+
+Returns `true` if the element has the specified class, `false` otherwise.
+
+Use `element.classList.contains()` to check if the element has the specified class.
+
 ```js
 const hasClass = (el, className) => el.classList.contains(className);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 hasClass(document.querySelector('p.special'), 'special'); // true
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### hide
-
-Hides all the elements specified.
-
-Use the spread operator (`...`) and `Array.forEach()` to apply `display: none` to each element specified.
-
+### hide
+
+Hides all the elements specified.
+
+Use the spread operator (`...`) and `Array.forEach()` to apply `display: none` to each element specified.
+
 ```js
 const hide = (...el) => [...el].forEach(e => (e.style.display = 'none'));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 hide(document.querySelectorAll('img')); // Hides all <img> elements on the page
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### httpsRedirect
-
-Redirects the page to HTTPS if its currently in HTTP. Also, pressing the back button doesn't take it back to the HTTP page as its replaced in the history.
-
-Use `location.protocol` to get the protocol currently being used. If it's not HTTPS, use `location.replace()` to replace the existing page with the HTTPS version of the page. Use `location.href` to get the full address, split it with `String.split()` and remove the protocol part of the URL.  
-
-```js
-const httpsRedirect = () => {
-  if (location.protocol !== 'https:') location.replace('https://' + location.href.split('//')[1]);
-};
-```
-
+### httpsRedirect
+
+Redirects the page to HTTPS if its currently in HTTP. Also, pressing the back button doesn't take it back to the HTTP page as its replaced in the history.
+
+Use `location.protocol` to get the protocol currently being used. If it's not HTTPS, use `location.replace()` to replace the existing page with the HTTPS version of the page. Use `location.href` to get the full address, split it with `String.split()` and remove the protocol part of the URL.  
+
+```js
+const httpsRedirect = () => {
+  if (location.protocol !== 'https:') location.replace('https://' + location.href.split('//')[1]);
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-httpsRedirect(); // If you are on http://mydomain.com, you are redirected to https://mydomain.com
-```
+```js
+httpsRedirect(); // If you are on http://mydomain.com, you are redirected to https://mydomain.com
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### onUserInputChange
-
-Run the callback whenever the user input type changes (`mouse` or `touch`). Useful for enabling/disabling code depending on the input device. This process is dynamic and works with hybrid devices (e.g. touchscreen laptops).
-
-Use two event listeners. Assume `mouse` input initially and bind a `touchstart` event listener to the document. 
-On `touchstart`, add a `mousemove` event listener to listen for two consecutive `mousemove` events firing within 20ms, using `performance.now()`.
-Run the callback with the input type as an argument in either of these situations.
-
+### onUserInputChange ![advanced](/advanced.svg)
+
+Run the callback whenever the user input type changes (`mouse` or `touch`). Useful for enabling/disabling code depending on the input device. This process is dynamic and works with hybrid devices (e.g. touchscreen laptops).
+
+Use two event listeners. Assume `mouse` input initially and bind a `touchstart` event listener to the document. 
+On `touchstart`, add a `mousemove` event listener to listen for two consecutive `mousemove` events firing within 20ms, using `performance.now()`.
+Run the callback with the input type as an argument in either of these situations.
+
 ```js
 const onUserInputChange = callback => {
   let type = 'mouse',
@@ -2108,8 +2001,8 @@ const onUserInputChange = callback => {
     (type = 'touch'), callback(type), document.addEventListener('mousemove', mousemoveHandler);
   });
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -2117,102 +2010,102 @@ const onUserInputChange = callback => {
 onUserInputChange(type => {
   console.log('The user is now using', type, 'as an input method.');
 });
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### redirect
-
-Redirects to a specified URL.
-
-Use `window.location.href` or `window.location.replace()` to redirect to `url`.
-Pass a second argument to simulate a link click (`true` - default) or an HTTP redirect (`false`).
-
+### redirect
+
+Redirects to a specified URL.
+
+Use `window.location.href` or `window.location.replace()` to redirect to `url`.
+Pass a second argument to simulate a link click (`true` - default) or an HTTP redirect (`false`).
+
 ```js
 const redirect = (url, asLink = true) =>
   asLink ? (window.location.href = url) : window.location.replace(url);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 redirect('https://google.com');
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### runAsync
-
-Runs a function in a separate thread by using a [Web Worker](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers), allowing long running functions to not block the UI.
-
-Create a new `Worker` using a `Blob` object URL, the contents of which should be the stringified version of the supplied function.
-Immediately post the return value of calling the function back.
-Return a promise, listening for `onmessage` and `onerror` events and resolving the data posted back from the worker, or throwing an error.
-
-```js
-const runAsync = fn => {
-  const blob = `var fn = ${fn.toString()}; postMessage(fn());`;
-  const worker = new Worker(
-    URL.createObjectURL(new Blob([blob]), {
-      type: 'application/javascript; charset=utf-8'
-    })
-  );
-  return new Promise((res, rej) => {
-    worker.onmessage = ({ data }) => {
-      res(data), worker.terminate();
-    };
-    worker.onerror = err => {
-      rej(err), worker.terminate();
-    };
-  });
-};
-```
-
+### runAsync ![advanced](/advanced.svg)
+
+Runs a function in a separate thread by using a [Web Worker](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers), allowing long running functions to not block the UI.
+
+Create a new `Worker` using a `Blob` object URL, the contents of which should be the stringified version of the supplied function.
+Immediately post the return value of calling the function back.
+Return a promise, listening for `onmessage` and `onerror` events and resolving the data posted back from the worker, or throwing an error.
+
+```js
+const runAsync = fn => {
+  const blob = `var fn = ${fn.toString()}; postMessage(fn());`;
+  const worker = new Worker(
+    URL.createObjectURL(new Blob([blob]), {
+      type: 'application/javascript; charset=utf-8'
+    })
+  );
+  return new Promise((res, rej) => {
+    worker.onmessage = ({ data }) => {
+      res(data), worker.terminate();
+    };
+    worker.onerror = err => {
+      rej(err), worker.terminate();
+    };
+  });
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-const longRunningFunction = () => {
-  let result = 0;
-  for (let i = 0; i < 1000; i++) {
-    for (let j = 0; j < 700; j++) {
-      for (let k = 0; k < 300; k++) {
-        result = result + i + j + k;
-      }
-    }
-  }
-  return result;
-};
-/*
-  NOTE: Since the function is running in a different context, closures are not supported.
-  The function supplied to `runAsync` gets stringified, so everything becomes literal.
-  All variables and functions must be defined inside.
-*/
-runAsync(longRunningFunction).then(console.log); // 209685000000
-runAsync(() => 10 ** 3).then(console.log); // 1000
-let outsideVariable = 50;
-runAsync(() => typeof outsideVariable).then(console.log); // 'undefined'
-```
+```js
+const longRunningFunction = () => {
+  let result = 0;
+  for (let i = 0; i < 1000; i++) {
+    for (let j = 0; j < 700; j++) {
+      for (let k = 0; k < 300; k++) {
+        result = result + i + j + k;
+      }
+    }
+  }
+  return result;
+};
+/*
+  NOTE: Since the function is running in a different context, closures are not supported.
+  The function supplied to `runAsync` gets stringified, so everything becomes literal.
+  All variables and functions must be defined inside.
+*/
+runAsync(longRunningFunction).then(console.log); // 209685000000
+runAsync(() => 10 ** 3).then(console.log); // 1000
+let outsideVariable = 50;
+runAsync(() => typeof outsideVariable).then(console.log); // 'undefined'
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### scrollToTop
-
-Smooth-scrolls to the top of the page.
-
-Get distance from top using `document.documentElement.scrollTop` or `document.body.scrollTop`.
-Scroll by a fraction of the distance from the top. Use `window.requestAnimationFrame()` to animate the scrolling.
-
+### scrollToTop
+
+Smooth-scrolls to the top of the page.
+
+Get distance from top using `document.documentElement.scrollTop` or `document.body.scrollTop`.
+Scroll by a fraction of the distance from the top. Use `window.requestAnimationFrame()` to animate the scrolling.
+
 ```js
 const scrollToTop = () => {
   const c = document.documentElement.scrollTop || document.body.scrollTop;
@@ -2221,134 +2114,105 @@ const scrollToTop = () => {
     window.scrollTo(0, c - c / 8);
   }
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 scrollToTop();
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### setStyle
-
-Sets the value of a CSS rule for the specified element.
-
-Use `element.style` to set the value of the CSS rule for the specified element to `value`.
-
+### setStyle
+
+Sets the value of a CSS rule for the specified element.
+
+Use `element.style` to set the value of the CSS rule for the specified element to `val`.
+
 ```js
-const setStyle = (el, ruleName, value) => (el.style[ruleName] = value);
-```
-
+const setStyle = (el, ruleName, val) => (el.style[ruleName] = val);
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 setStyle(document.querySelector('p'), 'font-size', '20px'); // The first <p> element on the page will have a font-size of 20px
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### show
-
-Shows all the elements specified.
-
-Use the spread operator (`...`) and `Array.forEach()` to clear the `display` property for each element specified.
-
+### show
+
+Shows all the elements specified.
+
+Use the spread operator (`...`) and `Array.forEach()` to clear the `display` property for each element specified.
+
 ```js
 const show = (...el) => [...el].forEach(e => (e.style.display = ''));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 show(document.querySelectorAll('img')); // Shows all <img> elements on the page
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### speechSynthesis
-
-Performs speech synthesis (experimental).
-
-Use `SpeechSynthesisUtterance.voice` and `window.speechSynthesis.getVoices()` to convert a message to speech.
-Use `window.speechSynthesis.speak()` to play the message.
-
-Learn more about the [SpeechSynthesisUtterance interface of the Web Speech API](https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesisUtterance).
-
-```js
-const speechSynthesis = message => {
-  const msg = new SpeechSynthesisUtterance(message);
-  msg.voice = window.speechSynthesis.getVoices()[0];
-  window.speechSynthesis.speak(msg);
-};
-```
-
-<details>
-<summary>Examples</summary>
+### toggleClass
 
-```js
-speechSynthesis('Hello, World'); // // plays the message
-```
+Toggle a class for an element.
 
-</details>
+Use `element.classList.toggle()` to toggle the specified class for the element.
 
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### toggleClass
-
-Toggle a class for an element.
-
-Use `element.classList.toggle()` to toggle the specified class for the element.
-
 ```js
 const toggleClass = (el, className) => el.classList.toggle(className);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 toggleClass(document.querySelector('p.special'), 'special'); // The paragraph will not have the 'special' class anymore
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### UUIDGeneratorBrowser
-
-Generates a UUID in a browser.
-
-Use `crypto` API to generate a UUID, compliant with [RFC4122](https://www.ietf.org/rfc/rfc4122.txt) version 4.
-
+### UUIDGeneratorBrowser
+
+Generates a UUID in a browser.
+
+Use `crypto` API to generate a UUID, compliant with [RFC4122](https://www.ietf.org/rfc/rfc4122.txt) version 4.
+
 ```js
 const UUIDGeneratorBrowser = () =>
   ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c =>
     (c ^ (crypto.getRandomValues(new Uint8Array(1))[0] & (15 >> (c / 4)))).toString(16)
   );
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 UUIDGeneratorBrowser(); // '7982fcfe-5721-4632-bede-6000885be57d'
-```
+```
 
 </details>
 
@@ -2357,100 +2221,75 @@ UUIDGeneratorBrowser(); // '7982fcfe-5721-4632-bede-6000885be57d'
 ---
  ## ⏱️ Date
 
-### formatDuration
-
-Returns the human readable format of the given number of milliseconds.
-
-Divide `ms` with the appropriate values to obtain the appropriate values for `day`, `hour`, `minute`, `second` and `millisecond`.
-Use `Object.entries()` with `Array.filter()` to keep only non-zero values.
-Use `Array.map()` to create the string for each value, pluralizing appropriately.
-Use `String.join(', ')` to combine the values into a string.
-
-```js
-const formatDuration = ms => {
-  if (ms < 0) ms = -ms;
-  const time = {
-    day: Math.floor(ms / 86400000),
-    hour: Math.floor(ms / 3600000) % 24,
-    minute: Math.floor(ms / 60000) % 60,
-    second: Math.floor(ms / 1000) % 60,
-    millisecond: Math.floor(ms) % 1000
-  };
-  return Object.entries(time)
-    .filter(val => val[1] !== 0)
-    .map(val => val[1] + ' ' + (val[1] !== 1 ? val[0] + 's' : val[0]))
-    .join(', ');
-};
-```
-
+### formatDuration
+
+Returns the human readable format of the given number of milliseconds.
+
+Divide `ms` with the appropriate values to obtain the appropriate values for `day`, `hour`, `minute`, `second` and `millisecond`.
+Use `Object.entries()` with `Array.filter()` to keep only non-zero values.
+Use `Array.map()` to create the string for each value, pluralizing appropriately.
+Use `String.join(', ')` to combine the values into a string.
+
+```js
+const formatDuration = ms => {
+  if (ms < 0) ms = -ms;
+  const time = {
+    day: Math.floor(ms / 86400000),
+    hour: Math.floor(ms / 3600000) % 24,
+    minute: Math.floor(ms / 60000) % 60,
+    second: Math.floor(ms / 1000) % 60,
+    millisecond: Math.floor(ms) % 1000
+  };
+  return Object.entries(time)
+    .filter(val => val[1] !== 0)
+    .map(val => val[1] + ' ' + (val[1] !== 1 ? val[0] + 's' : val[0]))
+    .join(', ');
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-formatDuration(1001); // '1 second, 1 millisecond'
-formatDuration(34325055574); // '397 days, 6 hours, 44 minutes, 15 seconds, 574 milliseconds'
-```
+```js
+formatDuration(1001); // '1 second, 1 millisecond'
+formatDuration(34325055574); // '397 days, 6 hours, 44 minutes, 15 seconds, 574 milliseconds'
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### getDaysDiffBetweenDates
-
-Returns the difference (in days) between two dates.
-
-Calculate the difference (in days) between two `Date` objects.
-
+### getDaysDiffBetweenDates
+
+Returns the difference (in days) between two dates.
+
+Calculate the difference (in days) between two `Date` objects.
+
 ```js
 const getDaysDiffBetweenDates = (dateInitial, dateFinal) =>
   (dateFinal - dateInitial) / (1000 * 3600 * 24);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 getDaysDiffBetweenDates(new Date('2017-12-13'), new Date('2017-12-22')); // 9
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### JSONToDate
-
-Converts a JSON object to a date.
-
-Use `Date()`, to convert dates in JSON format to readable format (`dd/mm/yyyy`).
-
-```js
-const JSONToDate = arr => {
-  const dt = new Date(parseInt(arr.toString().substr(6)));
-  return `${dt.getDate()}/${dt.getMonth() + 1}/${dt.getFullYear()}`;
-};
-```
-
-<details>
-<summary>Examples</summary>
+### toEnglishDate
 
-```js
-JSONToDate(/Date(1489525200000)/); // "14/3/2017"
-```
+Converts a date from American format to English format.
 
-</details>
+Use `Date.toISOString()`, `split('T')` and `replace()` to convert a date from American format to the English format.
+Throws an error if the passed time cannot be converted to a date.
 
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### toEnglishDate
-
-Converts a date from American format to English format.
-
-Use `Date.toISOString()`, `split('T')` and `replace()` to convert a date from American format to the English format.
-Throws an error if the passed time cannot be converted to a date.
-
 ```js
 const toEnglishDate = time => {
   try {
@@ -2460,35 +2299,35 @@ const toEnglishDate = time => {
       .replace(/-/g, '/');
   } catch (e) {}
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 toEnglishDate('09/21/2010'); // '21/09/2010'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### tomorrow
-
-Results in a string representation of tomorrow's date.
-Use `new Date()` to get today's date, adding `86400000` of seconds to it(24 hours), using `toISOString` to convert Date object to string.
-
+### tomorrow
+
+Results in a string representation of tomorrow's date.
+Use `new Date()` to get today's date, adding `86400000` of seconds to it(24 hours), using `Date.toISOString()` to convert Date object to string.
+
 ```js
 const tomorrow = () => new Date(new Date().getTime() + 86400000).toISOString().split('T')[0];
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 tomorrow(); // 2017-12-27 (if current date is 2017-12-26)
-```
+```
 
 </details>
 
@@ -2497,20 +2336,20 @@ tomorrow(); // 2017-12-27 (if current date is 2017-12-26)
 ---
  ## 🎛️ Function
 
-### chainAsync
-
-Chains asynchronous functions.
-
-Loop through an array of functions containing asynchronous events, calling `next` when each asynchronous event has completed.
-
+### chainAsync
+
+Chains asynchronous functions.
+
+Loop through an array of functions containing asynchronous events, calling `next` when each asynchronous event has completed.
+
 ```js
 const chainAsync = fns => {
   let curr = 0;
   const next = () => fns[curr++](next);
   next();
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -2524,24 +2363,24 @@ chainAsync([
     console.log('1 second');
   }
 ]);
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### compose
-
-Performs right-to-left function composition.
-
-Use `Array.reduce()` to perform right-to-left function composition.
-The last (rightmost) function can accept one or more arguments; the remaining functions must be unary.
-
+### compose
+
+Performs right-to-left function composition.
+
+Use `Array.reduce()` to perform right-to-left function composition.
+The last (rightmost) function can accept one or more arguments; the remaining functions must be unary.
+
 ```js
 const compose = (...fns) => fns.reduce((f, g) => (...args) => f(g(...args)));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -2550,191 +2389,191 @@ const add5 = x => x + 5;
 const multiply = (x, y) => x * y;
 const multiplyAndAdd5 = compose(add5, multiply);
 multiplyAndAdd5(5, 2); // 15
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### curry
-
-Curries a function.
-
-Use recursion.
-If the number of provided arguments (`args`) is sufficient, call the passed function `fn`.
-Otherwise, return a curried function `fn` that expects the rest of the arguments.
-If you want to curry a function that accepts a variable number of arguments (a variadic function, e.g. `Math.min()`), you can optionally pass the number of arguments to the second parameter `arity`.
-
+### curry
+
+Curries a function.
+
+Use recursion.
+If the number of provided arguments (`args`) is sufficient, call the passed function `fn`.
+Otherwise, return a curried function `fn` that expects the rest of the arguments.
+If you want to curry a function that accepts a variable number of arguments (a variadic function, e.g. `Math.min()`), you can optionally pass the number of arguments to the second parameter `arity`.
+
 ```js
 const curry = (fn, arity = fn.length, ...args) =>
   arity <= args.length ? fn(...args) : curry.bind(null, fn, arity, ...args);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 curry(Math.pow)(2)(10); // 1024
 curry(Math.min, 3)(10)(50)(2); // 2
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### defer
-
-Defers invoking a function until the current call stack has cleared.
-
-Use `setTimeout()` with a timeout of 1ms to add a new event to the browser event queue and allow the rendering engine to complete its work. Use the spread (`...`) operator to supply the function with an arbitrary number of arguments.
-
-```js
-const defer = (fn, ...args) => setTimeout(fn, 1, ...args);
-```
-
+### defer
+
+Defers invoking a function until the current call stack has cleared.
+
+Use `setTimeout()` with a timeout of 1ms to add a new event to the browser event queue and allow the rendering engine to complete its work. Use the spread (`...`) operator to supply the function with an arbitrary number of arguments.
+
+```js
+const defer = (fn, ...args) => setTimeout(fn, 1, ...args);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-// Example A:
-defer(console.log, 'a'), console.log('b'); // logs 'b' then 'a'
-
-// Example B:
-document.querySelector('#someElement').innerHTML = 'Hello';
-longRunningFunction(); //Browser will not update the HTML until this has finished
-defer(longRunningFunction); // Browser will update the HTML then run the function
-```
+```js
+// Example A:
+defer(console.log, 'a'), console.log('b'); // logs 'b' then 'a'
+
+// Example B:
+document.querySelector('#someElement').innerHTML = 'Hello';
+longRunningFunction(); //Browser will not update the HTML until this has finished
+defer(longRunningFunction); // Browser will update the HTML then run the function
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### functionName
-
-Logs the name of a function.
-
-Use `console.debug()` and the `name` property of the passed method to log the method's name to the `debug` channel of the console.
-
+### functionName
+
+Logs the name of a function.
+
+Use `console.debug()` and the `name` property of the passed method to log the method's name to the `debug` channel of the console.
+
 ```js
 const functionName = fn => (console.debug(fn.name), fn);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 functionName(Math.max); // max (logged in debug channel of console)
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### memoize
-
-Returns the memoized (cached) function.
-
-Create an empty cache by instantiating a new `Map` object.
-Return a function which takes a single argument to be supplied to the memoized function by first checking if the function's output for that specific input value is already cached, or store and return it if not. The `function` keyword must be used in order to allow the memoized function to have its `this` context changed if necessary.
-Allow access to the `cache` by setting it as a property on the returned function.
-
-```js
-const memoize = fn => {
-  const cache = new Map();
-  const cached = function(val) {
-    return cache.has(val) ? cache.get(val) : cache.set(val, fn.call(this, val)) && cache.get(val);
-  };
-  cached.cache = cache;
-  return cached;
-};
-```
-
+### memoize
+
+Returns the memoized (cached) function.
+
+Create an empty cache by instantiating a new `Map` object.
+Return a function which takes a single argument to be supplied to the memoized function by first checking if the function's output for that specific input value is already cached, or store and return it if not. The `function` keyword must be used in order to allow the memoized function to have its `this` context changed if necessary.
+Allow access to the `cache` by setting it as a property on the returned function.
+
+```js
+const memoize = fn => {
+  const cache = new Map();
+  const cached = function(val) {
+    return cache.has(val) ? cache.get(val) : cache.set(val, fn.call(this, val)) && cache.get(val);
+  };
+  cached.cache = cache;
+  return cached;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-// See the `anagrams` snippet.
-const anagramsCached = memoize(anagrams);
-anagramsCached('javascript'); // takes a long time
-anagramsCached('javascript'); // returns virtually instantly since it's now cached
-console.log(anagramsCached.cache); // The cached anagrams map
-```
+```js
+// See the `anagrams` snippet.
+const anagramsCached = memoize(anagrams);
+anagramsCached('javascript'); // takes a long time
+anagramsCached('javascript'); // returns virtually instantly since it's now cached
+console.log(anagramsCached.cache); // The cached anagrams map
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### once
-
-Ensures a function is called only once.
-
-Utilizing a closure, use a flag, `called`, and set it to `true` once the function is called for the first time, preventing it from being called again. In order to allow the function to have its `this` context changed (such as in an event listener), the `function` keyword must be used, and the supplied function must have the context applied.
-Allow the function to be supplied with an arbitrary number of arguments using the rest/spread (`...`) operator.
-
-```js
-const once = fn => {
-  let called = false;
-  return function(...args) {
-    if (called) return;
-    called = true;
-    return fn.apply(this, args);
-  };
-};
-```
-
+### once
+
+Ensures a function is called only once.
+
+Utilizing a closure, use a flag, `called`, and set it to `true` once the function is called for the first time, preventing it from being called again. In order to allow the function to have its `this` context changed (such as in an event listener), the `function` keyword must be used, and the supplied function must have the context applied.
+Allow the function to be supplied with an arbitrary number of arguments using the rest/spread (`...`) operator.
+
+```js
+const once = fn => {
+  let called = false;
+  return function(...args) {
+    if (called) return;
+    called = true;
+    return fn.apply(this, args);
+  };
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-const startApp = function(event) {
-  console.log(this, event); // document.body, MouseEvent
-};
-document.body.addEventListener('click', once(startApp)); // only runs `startApp` once upon click
-```
+```js
+const startApp = function(event) {
+  console.log(this, event); // document.body, MouseEvent
+};
+document.body.addEventListener('click', once(startApp)); // only runs `startApp` once upon click
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### runPromisesInSeries
-
-Runs an array of promises in series.
-
-Use `Array.reduce()` to create a promise chain, where each promise returns the next promise when resolved.
-
+### runPromisesInSeries
+
+Runs an array of promises in series.
+
+Use `Array.reduce()` to create a promise chain, where each promise returns the next promise when resolved.
+
 ```js
 const runPromisesInSeries = ps => ps.reduce((p, next) => p.then(next), Promise.resolve());
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const delay = d => new Promise(r => setTimeout(r, d));
 runPromisesInSeries([() => delay(1000), () => delay(2000)]); // Executes each promise sequentially, taking a total of 3 seconds to complete
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sleep
-
-Delays the execution of an asynchronous function.
-
-Delay executing part of an `async` function, by putting it to sleep, returning a `Promise`.
-
+### sleep
+
+Delays the execution of an asynchronous function.
+
+Delay executing part of an `async` function, by putting it to sleep, returning a `Promise`.
+
 ```js
 const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -2744,7 +2583,7 @@ async function sleepyWork() {
   await sleep(1000);
   console.log('I woke up after 1 second.');
 }
-```
+```
 
 </details>
 
@@ -2753,23 +2592,23 @@ async function sleepyWork() {
 ---
  ## 🔮 Logic
 
-### negate
-
-Negates a predicate function.
-
-Take a predicate function and apply `not` to it with its arguments.
-
+### negate
+
+Negates a predicate function.
+
+Take a predicate function and apply the not operator (`!`) to it with its arguments.
+
 ```js
 const negate = func => (...args) => !func(...args);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 filter([1, 2, 3, 4, 5, 6], negate(isEven)); // [1, 3, 5]
 negate(isOdd)(1); // false
-```
+```
 
 </details>
 
@@ -2778,183 +2617,160 @@ negate(isOdd)(1); // false
 ---
  ## ➗ Math
 
-### average
-
-Returns the average of an of two or more numbers/arrays.
-
-Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`, divide by the `length` of the array.
-
+### average
+
+Returns the average of an of two or more numbers.
+
+Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`, divide by the `length` of the array.
+
 ```js
-const average = (...arr) => {
-  const nums = [].concat(...arr);
-  return nums.reduce((acc, val) => acc + val, 0) / nums.length;
-};
-```
-
+const average = (...nums) => [...nums].reduce((acc, val) => acc + val, 0) / nums.length;
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
-average([1, 2, 3]); // 2
+average(...[1, 2, 3]); // 2
 average(1, 2, 3); // 2
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### clampNumber
-
-Clamps `num` within the inclusive range specified by the boundary values `a` and `b`.
-
-If `num` falls within the range, return `num`.
-Otherwise, return the nearest number in the range.
-
+### clampNumber
+
+Clamps `num` within the inclusive range specified by the boundary values `a` and `b`.
+
+If `num` falls within the range, return `num`.
+Otherwise, return the nearest number in the range.
+
 ```js
 const clampNumber = (num, a, b) => Math.max(Math.min(num, Math.max(a, b)), Math.min(a, b));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 clampNumber(2, 3, 5); // 3
 clampNumber(1, -1, -5); // -1
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### collatz
-
-Applies the Collatz algorithm.
-
-If `n` is even, return `n/2`. Otherwise, return `3n+1`.
-
-```js
-const collatz = n => (n % 2 == 0 ? n / 2 : 3 * n + 1);
-```
-
-<details>
-<summary>Examples</summary>
+### digitize
 
-```js
-collatz(8); // 4
-```
+Converts a number to an array of digits.
 
-</details>
+Convert the number to a string, using spread operators in ES6(`[...string]`) build an array.
+Use `Array.map()` and `parseInt()` to transform each value to an integer.
 
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### digitize
-
-Converts a number to an array of digits.
-
-Convert the number to a string, using spread operators in ES6(`[...string]`) build an array.
-Use `Array.map()` and `parseInt()` to transform each value to an integer.
-
 ```js
 const digitize = n => [...('' + n)].map(i => parseInt(i));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 digitize(123); // [1, 2, 3]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### distance
-
-Returns the distance between two points.
-
-Use `Math.hypot()` to calculate the Euclidean distance between two points.
-
+### distance
+
+Returns the distance between two points.
+
+Use `Math.hypot()` to calculate the Euclidean distance between two points.
+
 ```js
 const distance = (x0, y0, x1, y1) => Math.hypot(x1 - x0, y1 - y0);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 distance(1, 1, 2, 3); // 2.23606797749979
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### elo
-
-Computes the new ratings between two or more opponents using the [Elo rating system](https://en.wikipedia.org/wiki/Elo_rating_system). It takes an array
-of pre-ratings and returns an array containing post-ratings.
-The array should be ordered from best performer to worst performer (winner -> loser).
-
-Use the exponent `**` operator and math operators to compute the expected score (chance of winning)
-of each opponent and compute the new rating for each. Loop through the ratings, using each permutation to compute the post-Elo rating for each player in a pairwise fashion. Omit the second argument to use the default K-factor of 32, or supply a custom K-factor value. For details on the third argument, see the last example.
-
-```js
-const elo = ([...ratings], kFactor = 32, selfRating) => {
-  const [a, b] = ratings;
-  const expectedScore = (self, opponent) => 1 / (1 + 10 ** ((opponent - self) / 400));
-  const newRating = (rating, i) =>
-    (selfRating || rating) + kFactor * (i - expectedScore(i ? a : b, i ? b : a));
-  if (ratings.length === 2) {
-    return [newRating(a, 1), newRating(b, 0)];
-  } else {
-    for (let i = 0; i < ratings.length; i++) {
-      let j = i;
-      while (j < ratings.length - 1) {
-        [ratings[i], ratings[j + 1]] = elo([ratings[i], ratings[j + 1]], kFactor);
-        j++;
-      }
-    }
-  }
-  return ratings;
-};
-```
-
+### elo ![advanced](/advanced.svg)
+
+Computes the new ratings between two or more opponents using the [Elo rating system](https://en.wikipedia.org/wiki/Elo_rating_system). It takes an array
+of pre-ratings and returns an array containing post-ratings.
+The array should be ordered from best performer to worst performer (winner -> loser).
+
+Use the exponent `**` operator and math operators to compute the expected score (chance of winning).
+of each opponent and compute the new rating for each.
+Loop through the ratings, using each permutation to compute the post-Elo rating for each player in a pairwise fashion. 
+Omit the second argument to use the default `kFactor` of 32.
+
+```js
+const elo = ([...ratings], kFactor = 32, selfRating) => {
+  const [a, b] = ratings;
+  const expectedScore = (self, opponent) => 1 / (1 + 10 ** ((opponent - self) / 400));
+  const newRating = (rating, i) =>
+    (selfRating || rating) + kFactor * (i - expectedScore(i ? a : b, i ? b : a));
+  if (ratings.length === 2) {
+    return [newRating(a, 1), newRating(b, 0)];
+  } else {
+    for (let i = 0; i < ratings.length; i++) {
+      let j = i;
+      while (j < ratings.length - 1) {
+        [ratings[i], ratings[j + 1]] = elo([ratings[i], ratings[j + 1]], kFactor);
+        j++;
+      }
+    }
+  }
+  return ratings;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-// Standard 1v1s
-elo([1200, 1200]); // [1216, 1184]
-elo([1200, 1200], 64); // [1232, 1168]
-// 4 player FFA, all same rank
-elo([1200, 1200, 1200, 1200]).map(Math.round); // [1246, 1215, 1185, 1154]
-/*
-For teams, each rating can adjusted based on own team's average rating vs. 
-average rating of opposing team, with the score being added to their
-own individual rating by supplying it as the third argument.
-*/
-```
+```js
+// Standard 1v1s
+elo([1200, 1200]); // [1216, 1184]
+elo([1200, 1200], 64); // [1232, 1168]
+// 4 player FFA, all same rank
+elo([1200, 1200, 1200, 1200]).map(Math.round); // [1246, 1215, 1185, 1154]
+/*
+For teams, each rating can adjusted based on own team's average rating vs.
+average rating of opposing team, with the score being added to their
+own individual rating by supplying it as the third argument.
+*/
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### factorial
-
-Calculates the factorial of a number.
-
-Use recursion.
-If `n` is less than or equal to `1`, return `1`.
-Otherwise, return the product of `n` and the factorial of `n - 1`.
-Throws an exception if `n` is a negative number.
-
+### factorial
+
+Calculates the factorial of a number.
+
+Use recursion.
+If `n` is less than or equal to `1`, return `1`.
+Otherwise, return the product of `n` and the factorial of `n - 1`.
+Throws an exception if `n` is a negative number.
+
 ```js
 const factorial = n =>
   n < 0
@@ -2962,283 +2778,142 @@ const factorial = n =>
         throw new TypeError('Negative numbers are not allowed!');
       })()
     : n <= 1 ? 1 : n * factorial(n - 1);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 factorial(6); // 720
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### factors
-
-Returns the array of factors of the given `num`. 
-If the second argument is set to `true` returns only the prime factors of `num`.
-If `num` is `1` or `0` returns an empty array.
-If `num` is less than `0` returns all the factors of `-int` together with their additive inverses.
-
-Use `Array.from()`, `Array.map()` and `Array.filter()` to find all the factors of `num`.
-If given `num` is negative, use `Array.reduce()` to add the additive inverses to the array.
-Return all results if `primes` is `false`, else determine and return only the prime factors using `isPrime` and `Array.filter()`.
-Omit the second argument, `primes`, to return prime and non-prime factors by default.
-
-**Note**:- _Negative numbers are not considered prime._
-
-```js
-const factors = (num, primes = false) => {
-  const isPrime = num => {
-    const boundary = Math.floor(Math.sqrt(num));
-    for (var i = 2; i <= boundary; i++) if (num % i === 0) return false;
-    return num >= 2;
-  };
-  const isNeg = num < 0;
-  num = isNeg ? -num : num;
-  let array = Array.from({ length: num - 1 })
-    .map((val, i) => (num % (i + 2) === 0 ? i + 2 : false))
-    .filter(val => val);
-  if (isNeg)
-    array = array.reduce((acc, val) => {
-      acc.push(val);
-      acc.push(-val);
-      return acc;
-    }, []);
-  return primes ? array.filter(isPrime) : array;
-};
-```
-
-<details>
-<summary>Examples</summary>
+### fibonacci
 
-```js
-factors(12); // [2,3,4,6,12]
-factors(12, true); // [2,3]
-factors(-12); // [2, -2, 3, -3, 4, -4, 6, -6, 12, -12]
-factors(-12, true); // [2,3]
-```
+Generates an array, containing the Fibonacci sequence, up until the nth term.
 
-</details>
+Create an empty array of the specific length, initializing the first two values (`0` and `1`).
+Use `Array.reduce()` to add values into the array, using the sum of the last two values, except for the first two.
 
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### fibonacci
-
-Generates an array, containing the Fibonacci sequence, up until the nth term.
-
-Create an empty array of the specific length, initializing the first two values (`0` and `1`).
-Use `Array.reduce()` to add values into the array, using the sum of the last two values, except for the first two.
-
 ```js
 const fibonacci = n =>
   Array.from({ length: n }).reduce(
     (acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i),
     []
   );
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 fibonacci(6); // [0, 1, 1, 2, 3, 5]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### fibonacciCountUntilNum
-
-Returns the number of fibonnacci numbers up to `num`(`0` and `num` inclusive).
-
-Use a mathematical formula to calculate the number of fibonacci numbers until `num`.
-
+### gcd
+
+Calculates the greatest common divisor between two or more numbers/arrays.
+
+The inner `_gcd` function uses recursion.
+Base case is when `y` equals `0`. In this case, return `x`.
+Otherwise, return the GCD of `y` and the remainder of the division `x/y`.
+
 ```js
-const fibonacciCountUntilNum = num =>
-  Math.ceil(Math.log(num * Math.sqrt(5) + 1 / 2) / Math.log((Math.sqrt(5) + 1) / 2));
-```
-
+const gcd = (...arr) => {
+  const _gcd = (x, y) => (!y ? x : gcd(y, x % y));
+  return [...arr].reduce((a, b) => _gcd(a, b));
+};
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
-fibonacciCountUntilNum(10); // 7
-```
+gcd(8, 36); // 4
+gcd(...[12, 8, 32]); // 4
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### fibonacciUntilNum
-
-Generates an array, containing the Fibonacci sequence, up until the nth term.
-
-Create an empty array of the specific length, initializing the first two values (`0` and `1`).
-Use `Array.reduce()` to add values into the array, using the sum of the last two values, except for the first two.
-Uses a mathematical formula to calculate the length of the array required.
-
-```js
-const fibonacciUntilNum = num => {
-  let n = Math.ceil(Math.log(num * Math.sqrt(5) + 1 / 2) / Math.log((Math.sqrt(5) + 1) / 2));
-  return Array.from({ length: n }).reduce(
-    (acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i),
-    []
-  );
-};
-```
-
+### geometricProgression
+
+Initializes an array containing the numbers in the specified range where `start` and `end` are inclusive and the ratio between two terms is `step`.
+Returns an error if `step` equals `1`.
+
+Use `Array.from()`, `Math.log()` and `Math.floor()` to create an array of the desired length, `Array.map()` to fill with the desired values in a range.
+Omit the second argument, `start`, to use a default value of `1`.
+Omit the third argument, `step`, to use a default value of `2`.
+
+```js
+const geometricProgression = (end, start = 1, step = 2) =>
+  Array.from({ length: Math.floor(Math.log(end / start) / Math.log(step)) + 1 }).map(
+    (v, i) => start * step ** i
+  );
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-fibonacciUntilNum(10); // [ 0, 1, 1, 2, 3, 5, 8 ]
-```
+```js
+geometricProgression(256); // [1, 2, 4, 8, 16, 32, 64, 128, 256]
+geometricProgression(256, 3); // [3, 6, 12, 24, 48, 96, 192]
+geometricProgression(256, 1, 4); // [1, 4, 16, 64, 256]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### gcd
-
-Calculates the greatest common divisor between two or more numbers/arrays.
-
-The inner `_gcd` function uses recursion.
-Base case is when `y` equals `0`. In this case, return `x`.
-Otherwise, return the GCD of `y` and the remainder of the division `x/y`.
-
-```js
-const gcd = (...arr) => {
-  const _gcd = (x, y) => (!y ? x : gcd(y, x % y));
-  return [].concat(...arr).reduce((a, b) => _gcd(a, b));
-};
-```
-
-<details>
-<summary>Examples</summary>
+### hammingDistance
 
-```js
-gcd(8, 36); // 4
-```
+Calculates the Hamming distance between two values.
 
-</details>
+Use XOR operator (`^`) to find the bit difference between the two numbers, convert to a binary string using `toString(2)`.
+Count and return the number of `1`s in the string, using `match(/1/g)`.
 
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### geometricProgression
-
-Initializes an array containing the numbers in the specified range where `start` and `end` are inclusive and the ratio between two terms is `step`.
-Returns an error if `step` equals `1`.
-
-Use `Array.from()`, `Math.log()` and `Math.floor()` to create an array of the desired length, `Array.map()` to fill with the desired values in a range.
-Omit the second argument, `start`, to use a default value of `1`.
-Omit the third argument, `step`, to use a default value of `2`.
-
-```js
-const geometricProgression = (end, start = 1, step = 2) =>
-  Array.from({ length: Math.floor(Math.log(end / start) / Math.log(step)) + 1 }).map(
-    (v, i) => start * step ** i
-  );
-```
-
-<details>
-<summary>Examples</summary>
-
-```js
-geometricProgression(256); // [1, 2, 4, 8, 16, 32, 64, 128, 256]
-geometricProgression(256, 3); // [3, 6, 12, 24, 48, 96, 192]
-geometricProgression(256, 1, 4); // [1, 4, 16, 64, 256]
-```
-
-</details>
-
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### hammingDistance
-
-Calculates the Hamming distance between two values.
-
-Use XOR operator (`^`) to find the bit difference between the two numbers, convert to a binary string using `toString(2)`.
-Count and return the number of `1`s in the string, using `match(/1/g)`.
-
 ```js
 const hammingDistance = (num1, num2) => ((num1 ^ num2).toString(2).match(/1/g) || '').length;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 hammingDistance(2, 3); // 1
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### howManyTimes
-
-Returns the number of times `num` can be divided by `divisor` (integer or fractional) without getting a fractional answer.
-Works for both negative and positive integers.
-
-If `divisor` is `-1` or `1` return `Infinity`.
-If `divisor` is `-0` or `0` return `0`.
-Otherwise, keep dividing `num` with `divisor` and incrementing `i`, while the result is an integer.
-Return the number of times the loop was executed, `i`.
-
-```js
-const howManyTimes = (num, divisor) => {
-  if (divisor === 1 || divisor === -1) return Infinity;
-  if (divisor === 0) return 0;
-  let i = 0;
-  while (Number.isInteger(num / divisor)) {
-    i++;
-    num = num / divisor;
-  }
-  return i;
-};
-```
-
-<details>
-<summary>Examples</summary>
+### inRange
 
-```js
-howManyTimes(100, 2); // 2
-howManyTimes(100, 2.5); // 2
-howManyTimes(100, 0); // 0
-howManyTimes(100, -1); // Infinity
-```
+Checks if the given number falls within the given range.
 
-</details>
+Use arithmetic comparison to check if the given number is in the specified range.
+If the second parameter, `end`, is not specified, the range is considered to be from `0` to `start`.
 
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### inRange
-
-Checks if the given number falls within the given range.
-
-Use arithmetic comparison to check if the given number is in the specified range.
-If the second parameter, `end`, is not specified, the range is considered to be from `0` to `start`.
-
 ```js
 const inRange = (n, start, end = null) => {
   if (end && start > end) end = [start, (start = end)][0];
   return end == null ? n >= 0 && n < start : n >= start && n < end;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -3247,254 +2922,228 @@ inRange(3, 2, 5); // true
 inRange(3, 4); // true
 inRange(2, 3, 5); // false
 inrange(3, 2); // false
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isArmstrongNumber
-
-Checks if the given number is an Armstrong number or not.
-
-Convert the given number into an array of digits. Use the exponent operator (`**`) to get the appropriate power for each digit and sum them up. If the sum is equal to the number itself, return `true` otherwise `false`.
-
-```js
-const isArmstrongNumber = digits =>
-  (arr => arr.reduce((a, d) => a + parseInt(d) ** arr.length, 0) == digits)(
-    (digits + '').split('')
-  );
-```
-
-<details>
-<summary>Examples</summary>
+### isDivisible
 
-```js
-isArmstrongNumber(1634); // true
-isArmstrongNumber(56); // false
-```
+Checks if the first numeric argument is divisible by the second one.
 
-</details>
+Use the modulo operator (`%`) to check if the remainder is equal to `0`.
 
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### isDivisible
-
-Checks if the first numeric argument is divisible by the second one.
-
-Use the modulo operator (`%`) to check if the remainder is equal to `0`.
-
 ```js
 const isDivisible = (dividend, divisor) => dividend % divisor === 0;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 isDivisible(6, 3); // true
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isEven
-
-Returns `true` if the given number is even, `false` otherwise.
-
-Checks whether a number is odd or even using the modulo (`%`) operator.
-Returns `true` if the number is even, `false` if the number is odd.
-
+### isEven
+
+Returns `true` if the given number is even, `false` otherwise.
+
+Checks whether a number is odd or even using the modulo (`%`) operator.
+Returns `true` if the number is even, `false` if the number is odd.
+
 ```js
 const isEven = num => num % 2 === 0;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 isEven(3); // false
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isPrime
-
-Checks if the provided integer is a prime number.
-
-Check numbers from `2` to the square root of the given number.
-Return `false` if any of them divides the given number, else return `true`, unless the number is less than `2`.
-
-```js
-const isPrime = num => {
-  const boundary = Math.floor(Math.sqrt(num));
-  for (var i = 2; i <= boundary; i++) if (num % i == 0) return false;
-  return num >= 2;
-};
-```
-
+### isPrime
+
+Checks if the provided integer is a prime number.
+
+Check numbers from `2` to the square root of the given number.
+Return `false` if any of them divides the given number, else return `true`, unless the number is less than `2`.
+
+```js
+const isPrime = num => {
+  const boundary = Math.floor(Math.sqrt(num));
+  for (var i = 2; i <= boundary; i++) if (num % i == 0) return false;
+  return num >= 2;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isPrime(11); // true
-```
+```js
+isPrime(11); // true
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### lcm
-
-Returns the least common multiple of two or more numbers/arrays.
-
-Use the greatest common divisor (GCD) formula and `Math.abs()` to determine the least common multiple.
-The GCD formula uses recursion.
-
+### lcm
+
+Returns the least common multiple of two or more numbers.
+
+Use the greatest common divisor (GCD) formula and `Math.abs()` to determine the least common multiple.
+The GCD formula uses recursion.
+
 ```js
 const lcm = (...arr) => {
   const gcd = (x, y) => (!y ? x : gcd(y, x % y));
   const _lcm = (x, y) => x * y / gcd(x, y);
-  return [].concat(...arr).reduce((a, b) => _lcm(a, b));
+  return [...arr].reduce((a, b) => _lcm(a, b));
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 lcm(12, 7); // 84
-lcm([1, 3, 4], 5); // 60
-```
+lcm(...[1, 3, 4, 5]); // 60
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### luhnCheck
-
-Implementation of the [Luhn Algorithm](https://en.wikipedia.org/wiki/Luhn_algorithm) used to validate a variety of identification numbers, such as credit card numbers, IMEI numbers, National Provider Identifier numbers etc.
-
-Use `String.split('')`, `Array.reverse()` and `Array.map()` in combination with `parseInt()` to obtain an array of digits.
-Use `Array.splice(0,1)` to obtain the last digit.
-Use `Array.reduce()` to implement the Luhn Algorithm.
-Return `true` if `sum` is divisible by `10`, `false` otherwise.
-
-
-```js
-const luhnCheck = num => {
-  let arr = (num + '')
-    .split('')
-    .reverse()
-    .map(x => parseInt(x));
-  let lastDigit = arr.splice(0, 1)[0];
-  let sum = arr.reduce((acc, val, i) => (i % 2 !== 0 ? acc + val : acc + (val * 2) % 9 || 9), 0);
-  sum += lastDigit;
-  return sum % 10 === 0;
-};
-```
-
+### luhnCheck
+
+Implementation of the [Luhn Algorithm](https://en.wikipedia.org/wiki/Luhn_algorithm) used to validate a variety of identification numbers, such as credit card numbers, IMEI numbers, National Provider Identifier numbers etc.
+
+Use `String.split('')`, `Array.reverse()` and `Array.map()` in combination with `parseInt()` to obtain an array of digits.
+Use `Array.splice(0,1)` to obtain the last digit.
+Use `Array.reduce()` to implement the Luhn Algorithm.
+Return `true` if `sum` is divisible by `10`, `false` otherwise.
+
+
+```js
+const luhnCheck = num => {
+  let arr = (num + '')
+    .split('')
+    .reverse()
+    .map(x => parseInt(x));
+  let lastDigit = arr.splice(0, 1)[0];
+  let sum = arr.reduce((acc, val, i) => (i % 2 !== 0 ? acc + val : acc + (val * 2) % 9 || 9), 0);
+  sum += lastDigit;
+  return sum % 10 === 0;
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-luhnCheck('4485275742308327'); // true
-luhnCheck(6011329933655299); //  true
-luhnCheck(123456789); // false
-```
+```js
+luhnCheck('4485275742308327'); // true
+luhnCheck(6011329933655299); //  true
+luhnCheck(123456789); // false
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### median
-
-Returns the median of an array of numbers.
-
-Find the middle of the array, use `Array.sort()` to sort the values.
-Return the number at the midpoint if `length` is odd, otherwise the average of the two middle numbers.
-
+### median
+
+Returns the median of an array of numbers.
+
+Find the middle of the array, use `Array.sort()` to sort the values.
+Return the number at the midpoint if `length` is odd, otherwise the average of the two middle numbers.
+
 ```js
 const median = arr => {
   const mid = Math.floor(arr.length / 2),
     nums = [...arr].sort((a, b) => a - b);
   return arr.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 median([5, 6, 50, 1, -5]); // 5
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### percentile
-
-Uses the percentile formula to calculate how many numbers in the given array are less or equal to the given value.
-
-Use `Array.reduce()` to calculate how many numbers are below the value and how many are the same value and apply the percentile formula.
-
+### percentile
+
+Uses the percentile formula to calculate how many numbers in the given array are less or equal to the given value.
+
+Use `Array.reduce()` to calculate how many numbers are below the value and how many are the same value and apply the percentile formula.
+
 ```js
 const percentile = (arr, val) =>
   100 * arr.reduce((acc, v) => acc + (v < val ? 1 : 0) + (v === val ? 0.5 : 0), 0) / arr.length;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 percentile([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], 6); // 55
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### powerset
-
-Returns the powerset of a given array of numbers.
-
-Use `Array.reduce()` combined with `Array.map()` to iterate over elements and combine into an array containing all combinations.
-
+### powerset
+
+Returns the powerset of a given array of numbers.
+
+Use `Array.reduce()` combined with `Array.map()` to iterate over elements and combine into an array containing all combinations.
+
 ```js
 const powerset = arr => arr.reduce((a, v) => a.concat(a.map(r => [v].concat(r))), [[]]);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 powerset([1, 2]); // [[], [1], [2], [2,1]]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### primes
-
-Generates primes up to a given number, using the Sieve of Eratosthenes.
-
-Generate an array from `2` to the given number. Use `Array.filter()` to filter out the values divisible by any number from `2` to the square root of the provided number.
-
+### primes
+
+Generates primes up to a given number, using the Sieve of Eratosthenes.
+
+Generate an array from `2` to the given number. Use `Array.filter()` to filter out the values divisible by any number from `2` to the square root of the provided number.
+
 ```js
 const primes = num => {
   let arr = Array.from({ length: num - 1 }).map((x, i) => i + 2),
@@ -3503,218 +3152,193 @@ const primes = num => {
   numsTillSqroot.forEach(x => (arr = arr.filter(y => y % x !== 0 || y == x)));
   return arr;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 primes(10); // [2,3,5,7]
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### randomIntegerInRange
-
-Returns a random integer in the specified range.
-
-Use `Math.random()` to generate a random number and map it to the desired range, using `Math.floor()` to make it an integer.
-
+### randomIntegerInRange
+
+Returns a random integer in the specified range.
+
+Use `Math.random()` to generate a random number and map it to the desired range, using `Math.floor()` to make it an integer.
+
 ```js
 const randomIntegerInRange = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 randomIntegerInRange(0, 5); // 2
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### randomNumberInRange
-
-Returns a random number in the specified range.
-
-Use `Math.random()` to generate a random value, map it to the desired range using multiplication.
-
+### randomNumberInRange
+
+Returns a random number in the specified range.
+
+Use `Math.random()` to generate a random value, map it to the desired range using multiplication.
+
 ```js
 const randomNumberInRange = (min, max) => Math.random() * (max - min) + min;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 randomNumberInRange(2, 10); // 6.0211363285087005
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### round
-
-Rounds a number to a specified amount of digits.
-
-Use `Math.round()` and template literals to round the number to the specified number of digits.
-Omit the second argument, `decimals` to round to an integer.
-
+### round
+
+Rounds a number to a specified amount of digits.
+
+Use `Math.round()` and template literals to round the number to the specified number of digits.
+Omit the second argument, `decimals` to round to an integer.
+
 ```js
 const round = (n, decimals = 0) => Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 round(1.005, 2); // 1.01
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### solveRPN
-
-Solves the given mathematical expression in [reverse polish notation](https://en.wikipedia.org/wiki/Reverse_Polish_notation).
-Throws appropriate errors if there are unrecognized symbols or the expression is wrong. The valid operators are :- `+`,`-`,`*`,`/`,`^`,`**` (`^`&`**` are the exponential symbols and are same). This snippet does not supports any unary operators.
-
-Use a dictionary, `OPERATORS` to specify each operator's matching mathematical operation.
-Use `String.replace()` with a regular expression to replace `^` with `**`, `String.split()` to tokenize the string and `Array.filter()` to remove empty tokens.
-Use `Array.forEach()` to parse each `symbol`, evaluate it as a numeric value or operator and solve the mathematical expression.
-Numeric values are converted to floating point numbers and pushed to a `stack`, while operators are evaluated using the `OPERATORS` dictionary and pop elements from the `stack` to apply operations.
-
-```js
-const solveRPN = rpn => {
-  const OPERATORS = {
-    '*': (a, b) => a * b,
-    '+': (a, b) => a + b,
-    '-': (a, b) => a - b,
-    '/': (a, b) => a / b,
-    '**': (a, b) => a ** b
-  };
-  const [stack, solve] = [
-    [],
-    rpn
-      .replace(/\^/g, '**')
-      .split(/\s+/g)
-      .filter(el => !/\s+/.test(el) && el !== '')
-  ];
-  solve.forEach(symbol => {
-    if (!isNaN(parseFloat(symbol)) && isFinite(symbol)) {
-      stack.push(symbol);
-    } else if (Object.keys(OPERATORS).includes(symbol)) {
-      const [a, b] = [stack.pop(), stack.pop()];
-      stack.push(OPERATORS[symbol](parseFloat(b), parseFloat(a)));
-    } else {
-      throw `${symbol} is not a recognized symbol`;
-    }
-  });
-  if (stack.length === 1) return stack.pop();
-  else throw `${rpn} is not a proper RPN. Please check it and try again`;
-};
-```
-
+### sbdm
+
+Hashes the input string into a whole number.
+
+Use `String.split('')` and `Array.reduce()` to create a hash of the input string, utilizing bit shifting.
+
+```js
+const sdbm = str => {
+  let arr = str.split('');
+  return arr.reduce(
+    (hashCode, currentVal) =>
+      (hashCode = currentVal.charCodeAt(0) + (hashCode << 6) + (hashCode << 16) - hashCode),
+    0
+  );
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-solveRPN('15 7 1 1 + - / 3 * 2 1 1 + + -'); // 5
-solveRPN('2 3 ^'); // 8
-```
+```js
+console.log(sdbm('name')); // -3521204949
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### standardDeviation
-
-Returns the standard deviation of an array of numbers.
-
-Use `Array.reduce()` to calculate the mean, variance and the sum of the variance of the values, the variance of the values, then
-determine the standard deviation.
-You can omit the second argument to get the sample standard deviation or set it to `true` to get the population standard deviation.
-
-```js
-const standardDeviation = (arr, usePopulation = false) => {
-  const mean = arr.reduce((acc, val) => acc + val, 0) / arr.length;
-  return Math.sqrt(
-    arr.reduce((acc, val) => acc.concat((val - mean) ** 2), []).reduce((acc, val) => acc + val, 0) /
-      (arr.length - (usePopulation ? 0 : 1))
-  );
-};
-```
-
+### standardDeviation
+
+Returns the standard deviation of an array of numbers.
+
+Use `Array.reduce()` to calculate the mean, variance and the sum of the variance of the values, the variance of the values, then
+determine the standard deviation.
+You can omit the second argument to get the sample standard deviation or set it to `true` to get the population standard deviation.
+
+```js
+const standardDeviation = (arr, usePopulation = false) => {
+  const mean = arr.reduce((acc, val) => acc + val, 0) / arr.length;
+  return Math.sqrt(
+    arr.reduce((acc, val) => acc.concat((val - mean) ** 2), []).reduce((acc, val) => acc + val, 0) /
+      (arr.length - (usePopulation ? 0 : 1))
+  );
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-standardDeviation([10, 2, 38, 23, 38, 23, 21]); // 13.284434142114991 (sample)
-standardDeviation([10, 2, 38, 23, 38, 23, 21], true); // 12.29899614287479 (population)
-```
+```js
+standardDeviation([10, 2, 38, 23, 38, 23, 21]); // 13.284434142114991 (sample)
+standardDeviation([10, 2, 38, 23, 38, 23, 21], true); // 12.29899614287479 (population)
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sum
-
-Returns the sum of two or more numbers/arrays.
-
-Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`.
-
-```js
-const sum = (...arr) => [].concat(...arr).reduce((acc, val) => acc + val, 0);
-```
-
+### sum
+
+Returns the sum of two or more numbers/arrays.
+
+Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`.
+
+```js
+const sum = (...arr) => [...arr].reduce((acc, val) => acc + val, 0);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-sum([1, 2, 3, 4]); // 10
-```
+```js
+sum(...[1, 2, 3, 4]); // 10
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sumPower
-
-Returns the sum of the powers of all the numbers from `start` to `end` (both inclusive).
-
-Use `Array.fill()` to create an array of all the numbers in the target range, `Array.map()` and the exponent operator (`**`) to raise them to `power` and `Array.reduce()` to add them together.
-Omit the second argument, `power`, to use a default power of `2`.
-Omit the third argument, `start`, to use a default starting value of `1`.
-
-```js
-const sumPower = (end, power = 2, start = 1) =>
-  Array(end + 1 - start)
-    .fill(0)
-    .map((x, i) => (i + start) ** power)
-    .reduce((a, b) => a + b, 0);
-```
-
+### sumPower
+
+Returns the sum of the powers of all the numbers from `start` to `end` (both inclusive).
+
+Use `Array.fill()` to create an array of all the numbers in the target range, `Array.map()` and the exponent operator (`**`) to raise them to `power` and `Array.reduce()` to add them together.
+Omit the second argument, `power`, to use a default power of `2`.
+Omit the third argument, `start`, to use a default starting value of `1`.
+
+```js
+const sumPower = (end, power = 2, start = 1) =>
+  Array(end + 1 - start)
+    .fill(0)
+    .map((x, i) => (i + start) ** power)
+    .reduce((a, b) => a + b, 0);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-sumPower(10); // 385
-sumPower(10, 3); //3025
-sumPower(10, 3, 5); //2925
-```
+```js
+sumPower(10); // 385
+sumPower(10, 3); //3025
+sumPower(10, 3, 5); //2925
+```
 
 </details>
 
@@ -3723,87 +3347,87 @@ sumPower(10, 3, 5); //2925
 ---
  ## 📦 Node
 
-### hasFlags
-
-Check if the current process's arguments contain the specified flags.
-
-Use `Array.every()` and `Array.includes()` to check if `process.argv` contains all the specified flags.
-Use a regular expression to test if the specified flags are prefixed with `-` or `--` and prefix them accordingly.
-
-```js
-const hasFlags = (...flags) =>
-  flags.every(flag => process.argv.includes(/^-{1,2}/.test(flag) ? flag : '--' + flag));
-```
-
+### hasFlags
+
+Check if the current process's arguments contain the specified flags.
+
+Use `Array.every()` and `Array.includes()` to check if `process.argv` contains all the specified flags.
+Use a regular expression to test if the specified flags are prefixed with `-` or `--` and prefix them accordingly.
+
+```js
+const hasFlags = (...flags) =>
+  flags.every(flag => process.argv.includes(/^-{1,2}/.test(flag) ? flag : '--' + flag));
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-// node myScript.js -s --test --cool=true
-hasFlags('-s'); // true
-hasFlags('--test', 'cool=true', '-s'); // true
-hasFlags('special'); // false
-```
+```js
+// node myScript.js -s --test --cool=true
+hasFlags('-s'); // true
+hasFlags('--test', 'cool=true', '-s'); // true
+hasFlags('special'); // false
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isTravisCI
-
-Checks if the current environment is [Travis CI](https://travis-ci.org/).
-
-Checks if the current environment has the `TRAVIS` and `CI` environment variables ([reference](https://docs.travis-ci.com/user/environment-variables/#Default-Environment-Variables)).
-
-```js
-const isTravisCI = () => 'TRAVIS' in process.env && 'CI' in process.env;
-```
-
+### isTravisCI
+
+Checks if the current environment is [Travis CI](https://travis-ci.org/).
+
+Checks if the current environment has the `TRAVIS` and `CI` environment variables ([reference](https://docs.travis-ci.com/user/environment-variables/#Default-Environment-Variables)).
+
+```js
+const isTravisCI = () => 'TRAVIS' in process.env && 'CI' in process.env;
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isTravisCI(); // true (if code is running on Travis CI)
-```
+```js
+isTravisCI(); // true (if code is running on Travis CI)
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### JSONToFile
-
-Writes a JSON object to a file.
-
-Use `fs.writeFile()`, template literals and `JSON.stringify()` to write a `json` object to a `.json` file.
-
+### JSONToFile
+
+Writes a JSON object to a file.
+
+Use `fs.writeFile()`, template literals and `JSON.stringify()` to write a `json` object to a `.json` file.
+
 ```js
 const fs = require('fs');
 const JSONToFile = (obj, filename) =>
   fs.writeFile(`${filename}.json`, JSON.stringify(obj, null, 2));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 JSONToFile({ test: 'is passed' }, 'testJsonFile'); // writes the object to 'testJsonFile.json'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### readFileLines
-
-Returns an array of lines from the specified file.
-
-Use `readFileSync` function in `fs` node package to create a `Buffer` from a file.
-convert buffer to string using `toString(encoding)` function.
-creating an array from contents of file by `split`ing file content line by line (each `\n`).
-
+### readFileLines
+
+Returns an array of lines from the specified file.
+
+Use `readFileSync` function in `fs` node package to create a `Buffer` from a file.
+convert buffer to string using `toString(encoding)` function.
+creating an array from contents of file by `split`ing file content line by line (each `\n`).
+
 ```js
 const fs = require('fs');
 const readFileLines = filename =>
@@ -3811,71 +3435,71 @@ const readFileLines = filename =>
     .readFileSync(filename)
     .toString('UTF8')
     .split('\n');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
-/*
-contents of test.txt :
-  line1
-  line2
-  line3
-  ___________________________
+/*
+contents of test.txt :
+  line1
+  line2
+  line3
+  ___________________________
 */
 let arr = readFileLines('test.txt');
 console.log(arr); // ['line1', 'line2', 'line3']
-```
-
+```
+
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### untildify
-
-Converts a tilde path to an absolute path.
-
-Use `String.replace()` with a regular expression and `OS.homedir()` to replace the `~` in the start of the path with the home directory.
-
-```js
-const untildify = str => str.replace(/^~($|\/|\\)/, `${require('os').homedir()}$1`);
-```
-
+### untildify
+
+Converts a tilde path to an absolute path.
+
+Use `String.replace()` with a regular expression and `OS.homedir()` to replace the `~` in the start of the path with the home directory.
+
+```js
+const untildify = str => str.replace(/^~($|\/|\\)/, `${require('os').homedir()}$1`);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-untildify('~/node'); // '/Users/aUser/node'
-```
+```js
+untildify('~/node'); // '/Users/aUser/node'
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### UUIDGeneratorNode
-
-Generates a UUID in Node.JS.
-
-Use `crypto` API to generate a UUID, compliant with [RFC4122](https://www.ietf.org/rfc/rfc4122.txt) version 4.
-
+### UUIDGeneratorNode
+
+Generates a UUID in Node.JS.
+
+Use `crypto` API to generate a UUID, compliant with [RFC4122](https://www.ietf.org/rfc/rfc4122.txt) version 4.
+
 ```js
 const crypto = require('crypto');
 const UUIDGeneratorNode = () =>
   ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c =>
     (c ^ (crypto.randomBytes(1)[0] & (15 >> (c / 4)))).toString(16)
   );
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 UUIDGeneratorNode(); // '79c7c136-60ee-40a2-beb2-856f1feabefc'
-```
+```
 
 </details>
 
@@ -3884,13 +3508,13 @@ UUIDGeneratorNode(); // '79c7c136-60ee-40a2-beb2-856f1feabefc'
 ---
  ## 🗃️ Object
 
-### cleanObj
-
-Removes any properties except the ones specified from a JSON object.
-
-Use `Object.keys()` method to loop over given JSON object and deleting keys that are not `include`d in given array.
-Also if you give it a special key (`childIndicator`) it will search deeply inside it to apply function to inner objects too.
-
+### cleanObj
+
+Removes any properties except the ones specified from a JSON object.
+
+Use `Object.keys()` method to loop over given JSON object and deleting keys that are not included in given array.
+If you pass a special key,`childIndicator`, it will search deeply apply the function to inner objects, too.
+
 ```js
 const cleanObj = (obj, keysToKeep = [], childIndicator) => {
   Object.keys(obj).forEach(key => {
@@ -3902,250 +3526,250 @@ const cleanObj = (obj, keysToKeep = [], childIndicator) => {
   });
   return obj;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const testObj = { a: 1, b: 2, children: { a: 1, b: 2 } };
 cleanObj(testObj, ['a'], 'children'); // { a: 1, children : { a: 1}}
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### invertKeyValues
-
-Inverts the key-value pairs of an object, without mutating it.
-
-Use `Object.keys()` and `Array.reduce()` to invert the key-value pairs of an object.
-
-```js
-const invertKeyValues = obj =>
-  Object.keys(obj).reduce((acc, key) => {
-    acc[obj[key]] = key;
-    return acc;
-  }, {});
-```
-
+### invertKeyValues
+
+Inverts the key-value pairs of an object, without mutating it.
+
+Use `Object.keys()` and `Array.reduce()` to invert the key-value pairs of an object.
+
+```js
+const invertKeyValues = obj =>
+  Object.keys(obj).reduce((acc, key) => {
+    acc[obj[key]] = key;
+    return acc;
+  }, {});
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-invertKeyValues({ name: 'John', age: 20 }); // { 20: 'age', John: 'name' }
-```
+```js
+invertKeyValues({ name: 'John', age: 20 }); // { 20: 'age', John: 'name' }
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### lowercaseKeys
-
-Creates a new object from the specified object, where all the keys are in lowercase.
-
-Use `Object.keys()` and `Array.reduce()` to create a new object from the specified object.
-Convert each key in the original object to lowercase, using `String.toLowerCase()`.
-
+### lowercaseKeys
+
+Creates a new object from the specified object, where all the keys are in lowercase.
+
+Use `Object.keys()` and `Array.reduce()` to create a new object from the specified object.
+Convert each key in the original object to lowercase, using `String.toLowerCase()`.
+
 ```js
 const lowercaseKeys = obj =>
   Object.keys(obj).reduce((acc, key) => {
     acc[key.toLowerCase()] = obj[key];
     return acc;
   }, {});
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const myObj = { Name: 'Adam', sUrnAME: 'Smith' };
 const myObjLower = lowercaseKeys(myObj); // {name: 'Adam', surname: 'Smith'};
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### objectFromPairs
-
-Creates an object from the given key-value pairs.
-
-Use `Array.reduce()` to create and combine key-value pairs.
-
+### objectFromPairs
+
+Creates an object from the given key-value pairs.
+
+Use `Array.reduce()` to create and combine key-value pairs.
+
 ```js
 const objectFromPairs = arr => arr.reduce((a, v) => ((a[v[0]] = v[1]), a), {});
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 objectFromPairs([['a', 1], ['b', 2]]); // {a: 1, b: 2}
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### objectToPairs
-
-Creates an array of key-value pair arrays from an object.
-
-Use `Object.keys()` and `Array.map()` to iterate over the object's keys and produce an array with key-value pairs.
-
+### objectToPairs
+
+Creates an array of key-value pair arrays from an object.
+
+Use `Object.keys()` and `Array.map()` to iterate over the object's keys and produce an array with key-value pairs.
+
 ```js
 const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 objectToPairs({ a: 1, b: 2 }); // [['a',1],['b',2]])
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### orderBy
-
-Returns a sorted array of objects ordered by properties and orders.
-
-Uses a custom implementation of sort, that reduces the props array argument with a default value of 0, it uses destructuring to swap the properties position depending on the order passed.
-If no orders array is passed it sort by 'asc' by default.
-
-```js
-const orderBy = (arr, props, orders) =>
-  [...arr].sort((a, b) =>
-    props.reduce((acc, prop, i) => {
-      if (acc === 0) {
-        const [p1, p2] = orders && orders[i] === 'desc' ? [b[prop], a[prop]] : [a[prop], b[prop]];
-        acc = p1 > p2 ? 1 : p1 < p2 ? -1 : 0;
-      }
-      return acc;
-    }, 0)
-  );
-```
-
+### orderBy
+
+Returns a sorted array of objects ordered by properties and orders.
+
+Uses `Array.sort()`, `Array.reduce()` on the `props` array with a default value of `0`, use array destructuring to swap the properties position depending on the order passed.
+If no `orders` array is passed it sort by `'asc'` by default.
+
+```js
+const orderBy = (arr, props, orders) =>
+  [...arr].sort((a, b) =>
+    props.reduce((acc, prop, i) => {
+      if (acc === 0) {
+        const [p1, p2] = orders && orders[i] === 'desc' ? [b[prop], a[prop]] : [a[prop], b[prop]];
+        acc = p1 > p2 ? 1 : p1 < p2 ? -1 : 0;
+      }
+      return acc;
+    }, 0)
+  );
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-const users = [{ name: 'fred', age: 48 }, { name: 'barney', age: 36 }, { name: 'fred', age: 40 }];
-orderBy(users, ['name', 'age'], ['asc', 'desc']); // [{name: 'barney', age: 36}, {name: 'fred', age: 48}, {name: 'fred', age: 40}]
-orderBy(users, ['name', 'age']); // [{name: 'barney', age: 36}, {name: 'fred', age: 40}, {name: 'fred', age: 48}]
-```
+```js
+const users = [{ name: 'fred', age: 48 }, { name: 'barney', age: 36 }, { name: 'fred', age: 40 }];
+orderBy(users, ['name', 'age'], ['asc', 'desc']); // [{name: 'barney', age: 36}, {name: 'fred', age: 48}, {name: 'fred', age: 40}]
+orderBy(users, ['name', 'age']); // [{name: 'barney', age: 36}, {name: 'fred', age: 40}, {name: 'fred', age: 48}]
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### select
-
-Retrieve a property that indicated by the selector from an object.
-
-If the property does not exists returns `undefined`.
-
+### select
+
+Retrieve a property indicated by the selector from an object.
+
+If the property does not exists returns `undefined`.
+
 ```js
 const select = (from, selector) =>
   selector.split('.').reduce((prev, cur) => prev && prev[cur], from);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const obj = { selector: { to: { val: 'val to select' } } };
 select(obj, 'selector.to.val'); // 'val to select'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### shallowClone
-
-Creates a shallow clone of an object.
-
-Use `Object.assign()` and an empty object (`{}`) to create a shallow clone of the original.
-
+### shallowClone
+
+Creates a shallow clone of an object.
+
+Use `Object.assign()` and an empty object (`{}`) to create a shallow clone of the original.
+
 ```js
 const shallowClone = obj => Object.assign({}, obj);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const a = { x: true, y: 1 };
 const b = shallowClone(a); // a !== b
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### size
-
-Get size of arrays, objects or strings.
-
-Get type of `value` (`array`, `object` or `string`). 
-Use `length` property for arrays. 
-Use `length` or `size` value if available or number of keys for objects. 
-Use `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) created from `value` for strings.
-
-Split strings into array of characters with `split('')` and return its length.
-
-```js
-const size = value =>
-  Array.isArray(value)
-    ? value.length
-    : value && typeof value === 'object'
-      ? value.size || value.length || Object.keys(value).length
-      : typeof value === 'string' ? new Blob([value]).size : 0;
-```
-
+### size
+
+Get size of arrays, objects or strings.
+
+Get type of `val` (`array`, `object` or `string`). 
+Use `length` property for arrays.
+Use `length` or `size` value if available or number of keys for objects.
+Use `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) created from `val` for strings.
+
+Split strings into array of characters with `split('')` and return its length.
+
+```js
+const size = val =>
+  Array.isArray(val)
+    ? val.length
+    : val && typeof val === 'object'
+      ? val.size || val.length || Object.keys(val).length
+      : typeof val === 'string' ? new Blob([val]).size : 0;
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-size([1, 2, 3, 4, 5]); // 5
-size('size'); // 4
-size({ one: 1, two: 2, three: 3 }); // 3
-```
+```js
+size([1, 2, 3, 4, 5]); // 5
+size('size'); // 4
+size({ one: 1, two: 2, three: 3 }); // 3
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### truthCheckCollection
-
-Checks if the predicate (second argument) is truthy on all elements of a collection (first argument).
-
-Use `Array.every()` to check if each passed object has the specified property and if it returns a truthy value.
-
+### truthCheckCollection
+
+Checks if the predicate (second argument) is truthy on all elements of a collection (first argument).
+
+Use `Array.every()` to check if each passed object has the specified property and if it returns a truthy value.
+
 ```js
 const truthCheckCollection = (collection, pre) => collection.every(obj => obj[pre]);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 truthCheckCollection([{ user: 'Tinky-Winky', sex: 'male' }, { user: 'Dipsy', sex: 'male' }], 'sex'); // true
-```
+```
 
 </details>
 
@@ -4154,141 +3778,141 @@ truthCheckCollection([{ user: 'Tinky-Winky', sex: 'male' }, { user: 'Dipsy', sex
 ---
  ## 📜 String
 
-### anagrams
-
-⚠️ **WARNING**: This function's execution time increases exponentially with each character. Anything more than 8 to 10 characters will cause your browser to hang as it tries to solve all the different combinations.
-
-Generates all anagrams of a string (contains duplicates).
-
-Use recursion.
-For each letter in the given string, create all the partial anagrams for the rest of its letters.
-Use `Array.map()` to combine the letter with each partial anagram, then `Array.reduce()` to combine all anagrams in one array.
-Base cases are for string `length` equal to `2` or `1`.
-
-```js
-const anagrams = str => {
-  if (str.length <= 2) return str.length === 2 ? [str, str[1] + str[0]] : [str];
-  return str
-    .split('')
-    .reduce(
-      (acc, letter, i) =>
-        acc.concat(anagrams(str.slice(0, i) + str.slice(i + 1)).map(val => letter + val)),
-      []
-    );
-};
-```
-
+### anagrams
+
+⚠️ **WARNING**: This function's execution time increases exponentially with each character. Anything more than 8 to 10 characters will cause your browser to hang as it tries to solve all the different combinations.
+
+Generates all anagrams of a string (contains duplicates).
+
+Use recursion.
+For each letter in the given string, create all the partial anagrams for the rest of its letters.
+Use `Array.map()` to combine the letter with each partial anagram, then `Array.reduce()` to combine all anagrams in one array.
+Base cases are for string `length` equal to `2` or `1`.
+
+```js
+const anagrams = str => {
+  if (str.length <= 2) return str.length === 2 ? [str, str[1] + str[0]] : [str];
+  return str
+    .split('')
+    .reduce(
+      (acc, letter, i) =>
+        acc.concat(anagrams(str.slice(0, i) + str.slice(i + 1)).map(val => letter + val)),
+      []
+    );
+};
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-anagrams('abc'); // ['abc','acb','bac','bca','cab','cba']
-```
+```js
+anagrams('abc'); // ['abc','acb','bac','bca','cab','cba']
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### byteSize
-
-Returns the length of string.
-
-Convert a given string to a [`Blob` Object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) and find its `size`.
-
+### byteSize
+
+Returns the length of a string in bytes.
+
+Convert a given string to a [`Blob` Object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) and find its `size`.
+
 ```js
 const byteSize = str => new Blob([str]).size;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 byteSize('😀'); // 4
 byteSize('Hello World'); // 11
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### capitalize
-
-Capitalizes the first letter of a string.
-
-Use destructuring and `toUpperCase()` to capitalize first letter, `...rest` to get array of characters after first letter and then `Array.join('')` to make it a string again.
-Omit the `lowerRest` parameter to keep the rest of the string intact, or set it to `true` to convert to lowercase.
-
-```js
-const capitalize = ([first, ...rest], lowerRest = false) =>
-  first.toUpperCase() + (lowerRest ? rest.join('').toLowerCase() : rest.join(''));
-```
-
+### capitalize
+
+Capitalizes the first letter of a string.
+
+Use array destructuring and `String.toUpperCase()` to capitalize first letter, `...rest` to get array of characters after first letter and then `Array.join('')` to make it a string again.
+Omit the `lowerRest` parameter to keep the rest of the string intact, or set it to `true` to convert to lowercase.
+
+```js
+const capitalize = ([first, ...rest], lowerRest = false) =>
+  first.toUpperCase() + (lowerRest ? rest.join('').toLowerCase() : rest.join(''));
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-capitalize('fooBar'); // 'FooBar'
-capitalize('fooBar', true); // 'Foobar'
-```
+```js
+capitalize('fooBar'); // 'FooBar'
+capitalize('fooBar', true); // 'Foobar'
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### capitalizeEveryWord
-
-Capitalizes the first letter of every word in a string.
-
-Use `replace()` to match the first character of each word and `toUpperCase()` to capitalize it.
-
+### capitalizeEveryWord
+
+Capitalizes the first letter of every word in a string.
+
+Use `String.replace()` to match the first character of each word and `String.toUpperCase()` to capitalize it.
+
 ```js
 const capitalizeEveryWord = str => str.replace(/\b[a-z]/g, char => char.toUpperCase());
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 capitalizeEveryWord('hello world!'); // 'Hello World!'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### countVowels
-
-Retuns `number` of vowels in provided string.
-
-Use a regular expression to count the number of vowels `(A, E, I, O, U)` in a `string`.
-
+### countVowels
+
+Retuns `number` of vowels in provided string.
+
+Use a regular expression to count the number of vowels `(A, E, I, O, U)` in a `string`.
+
 ```js
 const countVowels = str => (str.match(/[aeiou]/gi) || []).length;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 countVowels('foobar'); // 3
 countVowels('gym'); // 0
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### escapeHTML
-
-Escapes a string for use in HTML.
-
-Use `String.replace()` with a regex that matches the characters that need to be escaped, using a callback function to replace each character instance with its associated escaped character using a dictionary (object).
-
+### escapeHTML
+
+Escapes a string for use in HTML.
+
+Use `String.replace()` with a regexp that matches the characters that need to be escaped, using a callback function to replace each character instance with its associated escaped character using a dictionary (object).
+
 ```js
 const escapeHTML = str =>
   str.replace(
@@ -4302,57 +3926,57 @@ const escapeHTML = str =>
         '"': '&quot;'
       }[tag] || tag)
   );
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 escapeHTML('<a href="#">Me & you</a>'); // '&lt;a href=&quot;#&quot;&gt;Me &amp; you&lt;/a&gt;'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### escapeRegExp
-
-Escapes a string to use in a regular expression.
-
-Use `replace()` to escape special characters.
-
+### escapeRegExp
+
+Escapes a string to use in a regular expression.
+
+Use `String.replace()` to escape special characters.
+
 ```js
 const escapeRegExp = str => str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 escapeRegExp('(test)'); // \\(test\\)
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### fromCamelCase
-
-Converts a string from camelcase.
-
-Use `replace()` to remove underscores, hyphens, and spaces and convert words to camelcase.
-Omit the second argument to use a default separator of `_`.
-
+### fromCamelCase
+
+Converts a string from camelcase.
+
+Use `String.replace()` to remove underscores, hyphens, and spaces and convert words to camelcase.
+Omit the second argument to use a default `separator` of `_`.
+
 ```js
 const fromCamelCase = (str, separator = '_') =>
   str
     .replace(/([a-z\d])([A-Z])/g, '$1' + separator + '$2')
     .replace(/([A-Z]+)([A-Z][a-z\d]+)/g, '$1' + separator + '$2')
     .toLowerCase();
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -4360,72 +3984,72 @@ const fromCamelCase = (str, separator = '_') =>
 fromCamelCase('someDatabaseFieldName', ' '); // 'some database field name'
 fromCamelCase('someLabelThatNeedsToBeCamelized', '-'); // 'some-label-that-needs-to-be-camelized'
 fromCamelCase('someJavascriptProperty', '_'); // 'some_javascript_property'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isAbsoluteURL
-
-Returns `true` if the given string is an absolute URL, `false` otherwise.
-
-Use a regular expression to test if the string is an absolute URL.
-
-```js
-const isAbsoluteURL = str => /^[a-z][a-z0-9+.-]*:/.test(str);
-```
-
+### isAbsoluteURL
+
+Returns `true` if the given string is an absolute URL, `false` otherwise.
+
+Use a regular expression to test if the string is an absolute URL.
+
+```js
+const isAbsoluteURL = str => /^[a-z][a-z0-9+.-]*:/.test(str);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-isAbsoluteURL('https://google.com'); // true
-isAbsoluteURL('ftp://www.myserver.net'); // true
-isAbsoluteURL('/foo/bar'); // false
-```
+```js
+isAbsoluteURL('https://google.com'); // true
+isAbsoluteURL('ftp://www.myserver.net'); // true
+isAbsoluteURL('/foo/bar'); // false
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### mask
-
-Replaces all but the last `num` of characters with the specified mask character.
-
-Use `String.slice()` to grab the portion of the characters that need to be masked and use `String.replace()` with a regex to replace every character with the mask character.
-Concatenate the masked characters with the remaining unmasked portion of the string.
-Omit the second argument, `num`, to keep a default of `4` characters unmasked. If `num` is negative, the unmasked characters will be at the start of the string.
-Omit the third argument, `mask`, to use a default character of `'*'` for the mask.
-
-```js
-const mask = (cc, num = 4, mask = '*') =>
-  ('' + cc).slice(0, -num).replace(/./g, mask) + ('' + cc).slice(-num);
-```
-
+### mask
+
+Replaces all but the last `num` of characters with the specified mask character.
+
+Use `String.slice()` to grab the portion of the characters that need to be masked and use `String.replace()` with a regexp to replace every character with the mask character.
+Concatenate the masked characters with the remaining unmasked portion of the string.
+Omit the second argument, `num`, to keep a default of `4` characters unmasked. If `num` is negative, the unmasked characters will be at the start of the string.
+Omit the third argument, `mask`, to use a default character of `'*'` for the mask.
+
+```js
+const mask = (cc, num = 4, mask = '*') =>
+  ('' + cc).slice(0, -num).replace(/./g, mask) + ('' + cc).slice(-num);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-mask(1234567890); // '******7890'
-mask(1234567890, 3); // '*******890'
-mask(1234567890, -4, '$'); // '1234$$$$$$'
-```
+```js
+mask(1234567890); // '******7890'
+mask(1234567890, 3); // '*******890'
+mask(1234567890, -4, '$'); // '1234$$$$$$'
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### palindrome
-
-Returns `true` if the given string is a palindrome, `false` otherwise.
-
-Convert string `toLowerCase()` and use `replace()` to remove non-alphanumeric characters from it.
-Then, `split('')` into individual characters, `reverse()`, `join('')` and compare to the original, unreversed string, after converting it `tolowerCase()`.
-
+### palindrome
+
+Returns `true` if the given string is a palindrome, `false` otherwise.
+
+Convert string `String.toLowerCase()` and use `String.replace()` to remove non-alphanumeric characters from it.
+Then, `String.split('')` into individual characters, `Array.reverse()`, `String.join('')` and compare to the original, unreversed string, after converting it `String.tolowerCase()`.
+
 ```js
 const palindrome = str => {
   const s = str.toLowerCase().replace(/[\W_]/g, '');
@@ -4437,164 +4061,134 @@ const palindrome = str => {
       .join('')
   );
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 palindrome('taco cat'); // true
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### pluralize
-
-Returns the singular or plural form of the word based on the input number. If the first argument is an `object`, it will use a closure by returning a function that can auto-pluralize words that don't simply end in `s` if the supplied dictionary contains the word.
-
-If `num` is either `-1` or `1`, return the singular form of the word. If `num` is any other number, return the plural form. Omit the third argument to use the default of the singular word + `s`, or supply a custom pluralized word when necessary. If the first argument is an `object`, utilize a closure by returning a function which can use the supplied dictionary to resolve the correct plural form of the word.
-
-```js
-const pluralize = (val, word, plural = word + 's') => {
-  const _pluralize = (num, word, plural = word + 's') =>
-    [1, -1].includes(Number(num)) ? word : plural;
-  if (typeof val === 'object') return (num, word) => _pluralize(num, word, val[word]);
-  return _pluralize(val, word, plural);
-};
-```
-
-<details>
-<summary>Examples</summary>
+### pluralize
 
-```js
-pluralize(0, 'apple'); // 'apples'
-pluralize(1, 'apple'); // 'apple'
-pluralize(2, 'apple'); // 'apples'
-pluralize(2, 'person', 'people'); // 'people'
-
-const PLURALS = {
-  person: 'people',
-  radius: 'radii'
-};
-const autoPluralize = pluralize(PLURALS);
-autoPluralize(2, 'person'); // 'people'
-```
+Returns the singular or plural form of the word based on the input number. If the first argument is an `object`, it will use a closure by returning a function that can auto-pluralize words that don't simply end in `s` if the supplied dictionary contains the word.
 
-</details>
+If `num` is either `-1` or `1`, return the singular form of the word. If `num` is any other number, return the plural form. Omit the third argument to use the default of the singular word + `s`, or supply a custom pluralized word when necessary. If the first argument is an `object`, utilize a closure by returning a function which can use the supplied dictionary to resolve the correct plural form of the word.
 
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### repeatString
-
-Repeats a string n times using `String.repeat()`
-
-If no string is provided the default is `""` and the default number of times is 2.
-
 ```js
-const repeatString = (str = '', num = 2) => {
-  return num >= 0 ? str.repeat(num) : str;
+const pluralize = (val, word, plural = word + 's') => {
+  const _pluralize = (num, word, plural = word + 's') =>
+    [1, -1].includes(Number(num)) ? word : plural;
+  if (typeof val === 'object') return (num, word) => _pluralize(num, word, val[word]);
+  return _pluralize(val, word, plural);
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
-repeatString('abc', 3); // 'abcabcabc'
-repeatString('abc'); // 'abcabc'
-```
+pluralize(0, 'apple'); // 'apples'
+pluralize(1, 'apple'); // 'apple'
+pluralize(2, 'apple'); // 'apples'
+pluralize(2, 'person', 'people'); // 'people'
+
+const PLURALS = {
+  person: 'people',
+  radius: 'radii'
+};
+const autoPluralize = pluralize(PLURALS);
+autoPluralize(2, 'person'); // 'people'
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### reverseString
-
-Reverses a string.
-
-Use `split('')` and `Array.reverse()` to reverse the order of the characters in the string.
-Combine characters to get a string using `join('')`.
-
+### reverseString
+
+Reverses a string.
+
+Use the spread operator (`...`) and `Array.reverse()` to reverse the order of the characters in the string.
+Combine characters to get a string using `String.join('')`.
+
 ```js
+
 const reverseString = str =>
-  str
-    .split('')
+  [..str]
     .reverse()
     .join('');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 reverseString('foobar'); // 'raboof'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sortCharactersInString
-
-Alphabetically sorts the characters in a string.
-
-Split the string using `split('')`, `Array.sort()` utilizing `localeCompare()`, recombine using `join('')`.
-
+### sortCharactersInString
+
+Alphabetically sorts the characters in a string.
+
+Use the spread operator (`...`), `Array.sort()` and  `String.localeCompare()` to sort the characters in `str`, recombine using `String.join('')`.
+
 ```js
-const sortCharactersInString = str =>
-  str
-    .split('')
-    .sort((a, b) => a.localeCompare(b))
-    .join('');
-```
-
+const sortCharactersInString = str => [...str].sort((a, b) => a.localeCompare(b)).join('');
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 sortCharactersInString('cabbage'); // 'aabbceg'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### splitLines
-
-Splits a multiline string into an array of lines.
-
-Use `String.split()` and a regular expression to match line breaks and create an array.
-
+### splitLines
+
+Splits a multiline string into an array of lines.
+
+Use `String.split()` and a regular expression to match line breaks and create an array.
+
 ```js
 const splitLines = str => str.split(/\r?\n/);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 splitLines('This\nis a\nmultiline\nstring.\n'); // ['This', 'is a', 'multiline', 'string' , '']
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### toCamelCase
-
-Converts a string to camelcase.
-
-Break the string into words and combine them capitalizing the first letter of each word.
-For more detailed explanation of this Regex, [visit this Site](https://regex101.com/r/bMCgAB/1).
-
+### toCamelCase
+
+Converts a string to camelcase.
+
+Break the string into words and combine them capitalizing the first letter of each word, using a regexp.
+
 ```js
 const toCamelCase = str => {
   let s =
@@ -4605,8 +4199,8 @@ const toCamelCase = str => {
       .join('');
   return s.slice(0, 1).toLowerCase() + s.slice(1);
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -4615,20 +4209,19 @@ toCamelCase('some_database_field_name'); // 'someDatabaseFieldName'
 toCamelCase('Some label that needs to be camelized'); // 'someLabelThatNeedsToBeCamelized'
 toCamelCase('some-javascript-property'); // 'someJavascriptProperty'
 toCamelCase('some-mixed_string with spaces_underscores-and-hyphens'); // 'someMixedStringWithSpacesUnderscoresAndHyphens'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### toKebabCase
-
-Converts a string to kebab case.
-
-Break the string into words and combine them using `-` as a separator.
-For more detailed explanation of this Regex, [visit this Site](https://regex101.com/r/bMCgAB/1).
-
+### toKebabCase
+
+Converts a string to kebab case.
+
+Break the string into words and combine them adding `-` as a separator, using a regexp.
+
 ```js
 const toKebabCase = str =>
   str &&
@@ -4636,8 +4229,8 @@ const toKebabCase = str =>
     .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
     .map(x => x.toLowerCase())
     .join('-');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -4647,75 +4240,74 @@ toKebabCase('some text'); // 'some-text'
 toKebabCase('some-mixed_string With spaces_underscores-and-hyphens'); // 'some-mixed-string-with-spaces-underscores-and-hyphens'
 toKebabCase('AllThe-small Things'); // "all-the-small-things"
 toKebabCase('IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML'); // "i-am-listening-to-fm-while-loading-different-url-on-my-browser-and-also-editing-xml-and-html"
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### toSnakeCase
-
-Converts a string to snake case.
-
-Break the string into words and combine them using `_` as a separator.
-For more detailed explanation of this Regex, [visit this Site](https://regex101.com/r/bMCgAB/1).
-
-```js
-const toSnakeCase = str =>
-  str &&
-  str
-    .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
-    .map(x => x.toLowerCase())
-    .join('_');
-```
-
+### toSnakeCase
+
+Converts a string to snake case.
+
+Break the string into words and combine them adding `_` as a separator, using a regexp.
+
+```js
+const toSnakeCase = str =>
+  str &&
+  str
+    .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
+    .map(x => x.toLowerCase())
+    .join('_');
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-toSnakeCase('camelCase'); // 'camel_case'
-toSnakeCase('some text'); // 'some_text'
-toSnakeCase('some-mixed_string With spaces_underscores-and-hyphens'); // 'some_mixed_string_with_spaces_underscores_and_hyphens'
-toSnakeCase('AllThe-small Things'); // "all_the_smal_things"
-toSnakeCase('IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML'); // "i_am_listening_to_fm_while_loading_different_url_on_my_browser_and_also_editing_some_xml_and_html"
-```
+```js
+toSnakeCase('camelCase'); // 'camel_case'
+toSnakeCase('some text'); // 'some_text'
+toSnakeCase('some-mixed_string With spaces_underscores-and-hyphens'); // 'some_mixed_string_with_spaces_underscores_and_hyphens'
+toSnakeCase('AllThe-small Things'); // "all_the_smal_things"
+toSnakeCase('IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML'); // "i_am_listening_to_fm_while_loading_different_url_on_my_browser_and_also_editing_some_xml_and_html"
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### truncateString
-
-Truncates a string up to a specified length.
-
-Determine if the string's `length` is greater than `num`.
-Return the string truncated to the desired length, with `...` appended to the end or the original string.
-
+### truncateString
+
+Truncates a string up to a specified length.
+
+Determine if the string's `length` is greater than `num`.
+Return the string truncated to the desired length, with `'...'` appended to the end or the original string.
+
 ```js
 const truncateString = (str, num) =>
   str.length > num ? str.slice(0, num > 3 ? num - 3 : num) + '...' : str;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 truncateString('boomerang', 7); // 'boom...'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### unescapeHTML
-
-Unescapes escaped HTML characters.
-
-Use `String.replace()` with a regex that matches the characters that need to be unescaped, using a callback function to replace each escaped character instance with its associated unescaped character using a dictionary (object).
-
+### unescapeHTML
+
+Unescapes escaped HTML characters.
+
+Use `String.replace()` with a regex that matches the characters that need to be unescaped, using a callback function to replace each escaped character instance with its associated unescaped character using a dictionary (object).
+
 ```js
 const unescapeHTML = str =>
   str.replace(
@@ -4729,38 +4321,341 @@ const unescapeHTML = str =>
         '&quot;': '"'
       }[tag] || tag)
   );
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 unescapeHTML('&lt;a href=&quot;#&quot;&gt;Me &amp; you&lt;/a&gt;'); // '<a href="#">Me & you</a>'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### words
-
-Converts a given string into an array of words.
-
-Use `String.split()` with a supplied pattern (defaults to non-alpha as a regex) to convert to an array of strings. Use `Array.filter()` to remove any empty strings.
-Omit the second argument to use the default regex.
-
+### words
+
+Converts a given string into an array of words.
+
+Use `String.split()` with a supplied pattern (defaults to non-alpha as a regexp) to convert to an array of strings. Use `Array.filter()` to remove any empty strings.
+Omit the second argument to use the default regexp.
+
 ```js
 const words = (str, pattern = /[^a-zA-Z-]+/) => str.split(pattern).filter(Boolean);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 words('I love javaScript!!'); // ["I", "love", "javaScript"]
 words('python, javaScript & coffee'); // ["python", "javaScript", "coffee"]
-```
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+---
+ ##  Type
+
+### getType
+
+Returns the native type of a value.
+
+Returns lowercased constructor name of value, `"undefined"` or `"null"` if value is `undefined` or `null`.
+
+```js
+const getType = v =>
+  v === undefined ? 'undefined' : v === null ? 'null' : v.constructor.name.toLowerCase();
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+getType(new Set([1, 2, 3])); // 'Set'
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
+### isArray
+
+Checks if the given argument is an array.
+
+Use `Array.isArray()` to check if a value is classified as an array.
+
+```js
+const isArray = val => Array.isArray(val);
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+isArray([1]); // true
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
+### isArrayLike
+
+Checks if the provided argument is array-like (i.e. is iterable).
+
+Use the spread operator (`...`) to check if the provided argument is iterable inside a `try... catch` block and the comma operator (`,`) to return the appropriate value.
+
+```js
+const isArrayLike = val => {
+  try {
+    return [...val], true;
+  } catch (e) {
+    return false;
+  }
+};
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+isArrayLike(document.querySelectorAll('.className')); // true
+isArrayLike('abc'); // true
+isArrayLike(null); // false
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
+### isBoolean
+
+Checks if the given argument is a native boolean element.
+
+Use `typeof` to check if a value is classified as a boolean primitive.
+
+```js
+const isBoolean = val => typeof val === 'boolean';
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+isBoolean(null); // false
+isBoolean(false); // true
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
+### isFunction
+
+Checks if the given argument is a function.
+
+Use `typeof` to check if a value is classified as a function primitive.
+
+```js
+const isFunction = val => typeof val === 'function';
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+isFunction('x'); // false
+isFunction(x => x); // true
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
+### isNull
+
+Returns `true` if the specified value is `null`, `false` otherwise.
+
+Use the strict equality operator to check if the value and of `val` are equal to `null`.
+
+```js
+const isNull = val => val === null;
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+isNull(null); // true
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
+### isNumber
+
+Checks if the given argument is a number.
+
+Use `typeof` to check if a value is classified as a number primitive.
+
+```js
+const isNumber = val => typeof val === 'number';
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+isNumber('1'); // false
+isNumber(1); // true
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
+### isPrimitive
+
+Returns a boolean determining if the supplied value is primitive or not.
+
+Use `Array.includes()` on an array of type strings which are not primitive,
+supplying the type using `typeof`.
+Since `typeof null` evaluates to `'object'`, it needs to be directly compared.
+
+```js
+const isPrimitive = val => !['object', 'function'].includes(typeof val) || val === null;
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+isPrimitive(null); // true
+isPrimitive(50); // true
+isPrimitive('Hello!'); // true
+isPrimitive(false); // true
+isPrimitive(Symbol()); // true
+isPrimitive([]); // false
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
+### isPromiseLike
+
+Returns `true` if an object looks like a [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise), `false` otherwise.
+
+Check if the object is not `null`, its `typeof` matches either `object` or `function` and if it has a `.then` property, which is also a `function`.
+
+```js
+const isPromiseLike = obj =>
+  obj !== null &&
+  (typeof obj === 'object' || typeof obj === 'function') &&
+  typeof obj.then === 'function';
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+isPromiseLike({
+  then: function() {
+    return '';
+  }
+}); // true
+isPromiseLike(null); // false
+isPromiseLike({}); // false
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
+### isString
+
+Checks if the given argument is a string.
+
+Use `typeof` to check if a value is classified as a string primitive.
+
+```js
+const isString = val => typeof val === 'string';
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+isString('10'); // true
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
+### isSymbol
+
+Checks if the given argument is a symbol.
+
+Use `typeof` to check if a value is classified as a symbol primitive.
+
+```js
+const isSymbol = val => typeof val === 'symbol';
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+isSymbol(Symbol('x')); // true
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
+### isValidJSON
+
+Checks if the provided argument is a valid JSON.
+
+Use `JSON.parse()` and a `try... catch` block to check if the provided argument is a valid JSON.
+
+```js
+const isValidJSON = obj => {
+  try {
+    JSON.parse(obj);
+    return true;
+  } catch (e) {
+    return false;
+  }
+};
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+isValidJSON('{"name":"Adam","age":20}'); // true
+isValidJSON('{"name":"Adam",age:"20"}'); // false
+isValidJSON(null); // true
+```
 
 </details>
 
@@ -4769,80 +4664,81 @@ words('python, javaScript & coffee'); // ["python", "javaScript", "coffee"]
 ---
  ## 🔧 Utility
 
-### cloneRegExp
-
-Clones a regular expression.
-
-Use `new RegExp()`, `RegExp.source` and `RegExp.flags` to clone the given regular expression.
-
-```js
-const cloneRegExp = regExp => new RegExp(regExp.source, regExp.flags);
-```
-
+### cloneRegExp
+
+Clones a regular expression.
+
+Use `new RegExp()`, `RegExp.source` and `RegExp.flags` to clone the given regular expression.
+
+```js
+const cloneRegExp = regExp => new RegExp(regExp.source, regExp.flags);
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-const regExp = /lorem ipsum/gi;
-const regExp2 = cloneRegExp(regExp); // /lorem ipsum/gi
-```
+```js
+const regExp = /lorem ipsum/gi;
+const regExp2 = cloneRegExp(regExp); // /lorem ipsum/gi
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### coalesce
-
-Returns the first non-null/undefined argument.
-
-Use `Array.find()` to return the first non `null`/`undefined` argument.
-
+### coalesce
+
+Returns the first non-null/undefined argument.
+
+Use `Array.find()` to return the first non `null`/`undefined` argument.
+
 ```js
 const coalesce = (...args) => args.find(_ => ![undefined, null].includes(_));
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 coalesce(null, undefined, '', NaN, 'Waldo'); // ""
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### coalesceFactory
-
-Returns a customized coalesce function that returns the first argument that returns `true` from the provided argument validation function.
-
-Use `Array.find()` to return the first argument that returns `true` from the provided argument validation function.
-
+### coalesceFactory
+
+Returns a customized coalesce function that returns the first argument that returns `true` from the provided argument validation function.
+
+Use `Array.find()` to return the first argument that returns `true` from the provided argument validation function.
+
 ```js
 const coalesceFactory = valid => (...args) => args.find(valid);
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 const customCoalesce = coalesceFactory(_ => ![null, undefined, '', NaN].includes(_));
 customCoalesce(undefined, null, NaN, '', 'Waldo'); // "Waldo"
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### extendHex
-
-Extends a 3-digit color code to a 6-digit color code.
-
-Use `Array.map()`, `split()` and `Array.join()` to join the mapped array for converting a 3-digit RGB notated hexadecimal color-code to the 6-digit form.
-`String.slice()` is used to remove `#` from string start since it's added once.
+### extendHex
+
+Extends a 3-digit color code to a 6-digit color code.
+
+Use `Array.map()`, `String.split()` and `Array.join()` to join the mapped array for converting a 3-digit RGB notated hexadecimal color-code to the 6-digit form.
+`Array.slice()` is used to remove `#` from string start since it's added once.
+
 ```js
 const extendHex = shortHex =>
   '#' +
@@ -4851,76 +4747,53 @@ const extendHex = shortHex =>
     .split('')
     .map(x => x + x)
     .join('');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 extendHex('#03f'); // '#0033ff'
 extendHex('05a'); // '#0055aa'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### getType
-
-Returns the native type of a value.
-
-Returns lowercased constructor name of value, "undefined" or "null" if value is undefined or null
-
-```js
-const getType = v =>
-  v === undefined ? 'undefined' : v === null ? 'null' : v.constructor.name.toLowerCase();
-```
-
-<details>
-<summary>Examples</summary>
+### getURLParameters
 
-```js
-getType(new Set([1, 2, 3])); // 'Set'
-```
+Returns an object containing the parameters of the current URL.
 
-</details>
+Use `String.match()` with an appropriate regular expression to get all key-value pairs, `Array.reduce()` to map and combine them into a single object.
+Pass `location.search` as the argument to apply to the current `url`.
 
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### getURLParameters
-
-Returns an object containing the parameters of the current URL.
-
-Use `match()` with an appropriate regular expression to get all key-value pairs, `Array.reduce()` to map and combine them into a single object.
-Pass `location.search` as the argument to apply to the current `url`.
-
 ```js
 const getURLParameters = url =>
   url
     .match(/([^?=&]+)(=([^&]*))/g)
     .reduce((a, v) => ((a[v.slice(0, v.indexOf('='))] = v.slice(v.indexOf('=') + 1)), a), {});
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 getURLParameters('http://url.com/page?name=Adam&surname=Smith'); // {name: 'Adam', surname: 'Smith'}
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### hexToRGB
-
-Converts a color code to a `rgb()` or `rgba()` string if alpha value is provided.
-
-Use bitwise right-shift operator and mask bits with `&` (and) operator to convert a hexadecimal color code (with or without prefixed with `#`) to a string with the RGB values. If it's 3-digit color code, first convert to 6-digit version. If an alpha value is provided alongside 6-digit hex, give `rgba()` string in return.
-
+### hexToRGB ![advanced](/advanced.svg)
+
+Converts a color code to a `rgb()` or `rgba()` string if alpha value is provided.
+
+Use bitwise right-shift operator and mask bits with `&` (and) operator to convert a hexadecimal color code (with or without prefixed with `#`) to a string with the RGB values. If it's 3-digit color code, first convert to 6-digit version. If an alpha value is provided alongside 6-digit hex, give `rgba()` string in return.
+
 ```js
 const hexToRGB = hex => {
   let alpha = false,
@@ -4941,8 +4814,8 @@ const hexToRGB = hex => {
     ')'
   );
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
@@ -4950,151 +4823,6 @@ const hexToRGB = hex => {
 hexToRGB('#27ae60ff'); // 'rgba(39, 174, 96, 255)'
 hexToRGB('27ae60'); // 'rgb(39, 174, 96)'
 hexToRGB('#fff'); // 'rgb(255, 255, 255)'
-```
-
-</details>
-
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### isArray
-
-Checks if the given argument is an array.
-
-Use `Array.isArray()` to check if a value is classified as an array.
-
-```js
-const isArray = val => !!val && Array.isArray(val);
-```
-
-<details>
-<summary>Examples</summary>
-
-```js
-isArray(null); // false
-isArray([1]); // true
-```
-
-</details>
-
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### isArrayLike
-
-Checks if the provided argument is array-like (i.e. is iterable).
-
-Use the spread operator (`...`) to check if the provided argument is iterable inside a `try... catch` block and the comma operator (`,`) to return the appropriate value.
-
-```js
-const isArrayLike = val => {
-  try {
-    return [...val], true;
-  } catch (e) {
-    return false;
-  }
-};
-```
-
-<details>
-<summary>Examples</summary>
-
-```js
-isArrayLike(document.querySelectorAll('.className')); // true
-isArrayLike('abc'); // true
-isArrayLike(null); // false
-```
-
-</details>
-
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### isBoolean
-
-Checks if the given argument is a native boolean element.
-
-Use `typeof` to check if a value is classified as a boolean primitive.
-
-```js
-const isBoolean = val => typeof val === 'boolean';
-```
-
-<details>
-<summary>Examples</summary>
-
-```js
-isBoolean(null); // false
-isBoolean(false); // true
-```
-
-</details>
-
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### isFunction
-
-Checks if the given argument is a function.
-
-Use `typeof` to check if a value is classified as a function primitive.
-
-```js
-const isFunction = val => typeof val === 'function';
-```
-
-<details>
-<summary>Examples</summary>
-
-```js
-isFunction(null); // false
-isFunction('x'); // false
-isFunction(x => x); // true
-```
-
-</details>
-
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### isNull
-
-Returns `true` if the specified value is `null`, `false` otherwise.
-
-Use the strict equality operator to check if the value and of `val` are equal to `null`.
-
-```js
-const isNull = val => val === null;
-```
-
-<details>
-<summary>Examples</summary>
-
-```js
-isNull(null); // true
-```
-
-</details>
-
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### isNumber
-
-Checks if the given argument is a number.
-
-Use `typeof` to check if a value is classified as a number primitive.
-
-```js
-const isNumber = val => typeof val === 'number';
-```
-
-<details>
-<summary>Examples</summary>
-
-```js
-isNumber('1'); // false
-isNumber(1); // true
 ```
 
 </details>
@@ -5102,257 +4830,93 @@ isNumber(1); // true
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isPrimitive
-
-Returns a boolean determining if the supplied value is primitive or not.
-
-Use `Array.includes()` on an array of type strings which are not primitive,
-supplying the type using `typeof`.
-Since `typeof null` evaluates to `'object'`, it needs to be directly compared.
-
-```js
-const isPrimitive = val => !['object', 'function'].includes(typeof val) || val === null;
-```
-
-<details>
-<summary>Examples</summary>
+### prettyBytes
 
-```js
-isPrimitive(null); // true
-isPrimitive(50); // true
-isPrimitive('Hello!'); // true
-isPrimitive(false); // true
-isPrimitive(Symbol()); // true
-isPrimitive([]); // false
-```
+Converts a number in bytes to a human-readable string.
 
-</details>
+Use an array dictionary of units to be accessed based on the exponent.
+Use `Number.toPrecision()` to truncate the number to a certain number of digits.
+Return the prettified string by building it up, taking into account the supplied options and whether it is negative or not.
+Omit the second argument, `precision`, to use a default precision of `3` digits.
+Omit the third argument, `addSpace`, to add space between the number and unit by default.
 
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### isPromiseLike
-
-Returns `true` if an object looks like a [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise), `false` otherwise.
-
-Check if the object is not `null`, its `typeof` matches either `object` or `function` and if it has a `.then` property, which is also a `function`.
-
-```js
-const isPromiseLike = obj =>
-  obj !== null &&
-  (typeof obj === 'object' || typeof obj === 'function') &&
-  typeof obj.then === 'function';
-```
-
-<details>
-<summary>Examples</summary>
-
-```js
-isPromiseLike({
-  then: function() {
-    return '';
-  }
-}); // true
-isPromiseLike(null); // false
-isPromiseLike({}); // false
-```
-
-</details>
-
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### isString
-
-Checks if the given argument is a string.
-
-Use `typeof` to check if a value is classified as a string primitive.
-
 ```js
-const isString = val => typeof val === 'string';
-```
-
+const prettyBytes = (num, precision = 3, addSpace = true) => {
+  const UNITS = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
+  if (Math.abs(num) < 1) return num + (addSpace ? ' ' : '') + UNITS[0];
+  const exponent = Math.min(Math.floor(Math.log10(num < 0 ? -num : num) / 3), UNITS.length - 1);
+  const n = Number(((num < 0 ? -num : num) / 1000 ** exponent).toPrecision(precision));
+  return (num < 0 ? '-' : '') + n + (addSpace ? ' ' : '') + UNITS[exponent];
+};
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
-isString('10'); // true
-```
+prettyBytes(1000); // 1 KB
+prettyBytes(-27145424323.5821, 5); // -27.145 GB
+prettyBytes(123456789, 3, false); // 123MB
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### isSymbol
-
-Checks if the given argument is a symbol.
-
-Use `typeof` to check if a value is classified as a symbol primitive.
-
-```js
-const isSymbol = val => typeof val === 'symbol';
-```
-
-<details>
-<summary>Examples</summary>
+### randomHexColorCode
 
-```js
-isSymbol(Symbol('x')); // true
-```
+Generates a random hexadecimal color code.
 
-</details>
+Use `Math.random` to generate a random 24-bit(6x4bits) hexadecimal number. Use bit shifting and then convert it to an hexadecimal String using `toString(16)`.
 
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### isValidJSON
-
-Checks if the provided argument is a valid JSON.
-
-Use `JSON.parse()` and a `try... catch` block to check if the provided argument is a valid JSON.
-
-```js
-const isValidJSON = obj => {
-  try {
-    JSON.parse(obj);
-    return true;
-  } catch (e) {
-    return false;
-  }
-};
-```
-
-<details>
-<summary>Examples</summary>
-
-```js
-isValidJSON('{"name":"Adam","age":20}'); // true
-isValidJSON('{"name":"Adam",age:"20"}'); // false
-isValidJSON(null); // true
-```
-
-</details>
-
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### prettyBytes
-
-Converts a number in bytes to a human-readable string.
-
-Use an array dictionary of units to be accessed based on the exponent.
-Use `Number.toPrecision()` to truncate the number to a certain number of digits.
-Return the prettified string by building it up, taking into account the supplied options and whether it is negative or not.
-Omit the second argument, `precision`, to use a default precision of `3` digits.
-Omit the third argument, `addSpace`, to add space between the number and unit by default.
-
-```js
-const prettyBytes = (num, precision = 3, addSpace = true) => {
-  const UNITS = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
-  if (Math.abs(num) < 1) return num + (addSpace ? ' ' : '') + UNITS[0];
-  const exponent = Math.min(Math.floor(Math.log10(num < 0 ? -num : num) / 3), UNITS.length - 1);
-  const n = Number(((num < 0 ? -num : num) / 1000 ** exponent).toPrecision(precision));
-  return (num < 0 ? '-' : '') + n + (addSpace ? ' ' : '') + UNITS[exponent];
-};
-```
-
-<details>
-<summary>Examples</summary>
-
-```js
-prettyBytes(1000); // 1 KB
-prettyBytes(-27145424323.5821, 5); // -27.145 GB
-prettyBytes(123456789, 3, false); // 123MB
-```
-
-</details>
-
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### randomHexColorCode
-
-Generates a random hexadecimal color code.
-
-Use `Math.random` to generate a random 24-bit(6x4bits) hexadecimal number. Use bit shifting and then convert it to an hexadecimal String using `toString(16)`.
-
 ```js
 const randomHexColorCode = () => {
   let n = ((Math.random() * 0xfffff) | 0).toString(16);
   return '#' + (n.length !== 6 ? ((Math.random() * 0xf) | 0).toString(16) + n : n);
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 randomHexColorCode(); // "#e34155"
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### RGBToHex
-
-Converts the values of RGB components to a color code.
-
-Convert given RGB parameters to hexadecimal string using bitwise left-shift operator (`<<`) and `toString(16)`, then `padStart(6,'0')` to get a 6-digit hexadecimal value.
-
+### RGBToHex
+
+Converts the values of RGB components to a color code.
+
+Convert given RGB parameters to hexadecimal string using bitwise left-shift operator (`<<`) and `toString(16)`, then `String.padStart(6,'0')` to get a 6-digit hexadecimal value.
+
 ```js
 const RGBToHex = (r, g, b) => ((r << 16) + (g << 8) + b).toString(16).padStart(6, '0');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 RGBToHex(255, 165, 1); // 'ffa501'
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### sbdm
-
-This algorithm is a simple hash-algorithm that hashes it input string `s` into a whole number.
-
-Use `split('')` and `Array.reduce()` to create a hash of the input string, utilizing bit shifting.
-
-```js
-const sdbm = str => {
-  let arr = str.split('');
-  return arr.reduce(
-    (hashCode, currentVal) =>
-      (hashCode = currentVal.charCodeAt(0) + (hashCode << 6) + (hashCode << 16) - hashCode),
-    0
-  );
-};
-```
-
-<details>
-<summary>Examples</summary>
+### timeTaken
 
-```js
-console.log(sdbm('name')); // -3521204949
-```
+Measures the time taken by a function to execute.
 
-</details>
+Use `console.time()` and `console.timeEnd()` to measure the difference between the start and end times to determine how long the callback took to execute.
 
-<br>[⬆ Back to top](#table-of-contents)
-
-
-### timeTaken
-
-Measures the time taken by a function to execute.
-
-Use `console.time()` and `console.timeEnd()` to measure the difference between the start and end times to determine how long the callback took to execute.
-
 ```js
 const timeTaken = callback => {
   console.time('timeTaken');
@@ -5360,48 +4924,48 @@ const timeTaken = callback => {
   console.timeEnd('timeTaken');
   return r;
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 timeTaken(() => Math.pow(2, 10)); // 1024, (logged): timeTaken: 0.02099609375ms
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### toDecimalMark
-
-Use `toLocaleString()` to convert a float-point arithmetic to the [Decimal mark](https://en.wikipedia.org/wiki/Decimal_mark) form. It makes a comma separated string from a number.
-
+### toDecimalMark
+
+Use `toLocaleString()` to convert a float-point arithmetic to the [Decimal mark](https://en.wikipedia.org/wiki/Decimal_mark) form. It makes a comma separated string from a number.
+
  ```js
 const toDecimalMark = num => num.toLocaleString('en-US');
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 toDecimalMark(12305030388.9087); // "12,305,030,388.9087"
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### toOrdinalSuffix
-
-Adds an ordinal suffix to a number.
-
-Use the modulo operator (`%`) to find values of single and tens digits.
-Find which ordinal pattern digits match.
-If digit is found in teens pattern, use teens ordinal.
-
+### toOrdinalSuffix
+
+Adds an ordinal suffix to a number.
+
+Use the modulo operator (`%`) to find values of single and tens digits.
+Find which ordinal pattern digits match.
+If digit is found in teens pattern, use teens ordinal.
+
 ```js
 const toOrdinalSuffix = num => {
   const int = parseInt(num),
@@ -5413,79 +4977,79 @@ const toOrdinalSuffix = num => {
     ? int + ordinals[digits[0] - 1]
     : int + ordinals[3];
 };
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 toOrdinalSuffix('123'); // "123rd"
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### validateNumber
-
-Returns `true` if the given value is a number, `false` otherwise.
-
-Use `!isNaN` in combination with `parseFloat()` to check if the argument is a number.
-Use `isFinite()` to check if the number is finite.
-Use `Number()` to check if the coercion holds.
-
+### validateNumber
+
+Returns `true` if the given value is a number, `false` otherwise.
+
+Use `!isNaN()` in combination with `parseFloat()` to check if the argument is a number.
+Use `isFinite()` to check if the number is finite.
+Use `Number()` to check if the coercion holds.
+
 ```js
 const validateNumber = n => !isNaN(parseFloat(n)) && isFinite(n) && Number(n) == n;
-```
-
+```
+
 <details>
 <summary>Examples</summary>
 
 ```js
 validateNumber('10'); // true
-```
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-### yesNo
-
-Returns `true` if the string is `y`/`yes` or `false` if the string is `n`/`no`.
-
-Use `RegExp.test()` to check if the string evaluates to `y/yes` or `n/no`.
-Omit the second argument, `def` to set the default answer as `no`.
-
-```js
-const yesNo = (val, def = false) =>
-  /^(y|yes)$/i.test(val) ? true : /^(n|no)$/i.test(val) ? false : def;
-```
-
+### yesNo
+
+Returns `true` if the string is `y`/`yes` or `false` if the string is `n`/`no`.
+
+Use `RegExp.test()` to check if the string evaluates to `y/yes` or `n/no`.
+Omit the second argument, `def` to set the default answer as `no`.
+
+```js
+const yesNo = (val, def = false) =>
+  /^(y|yes)$/i.test(val) ? true : /^(n|no)$/i.test(val) ? false : def;
+```
+
 <details>
 <summary>Examples</summary>
 
-```js
-yesNo('Y'); // true
-yesNo('yes'); // true
-yesNo('No'); // false
-yesNo('Foo', true); // true
-```
+```js
+yesNo('Y'); // true
+yesNo('yes'); // true
+yesNo('No'); // false
+yesNo('Foo', true); // true
+```
 
 </details>
 
 <br>[⬆ Back to top](#table-of-contents)
 
 
-## Collaborators
-
-| [<img src="https://github.com/Chalarangelo.png" width="100px;"/>](https://github.com/Chalarangelo)<br/> [<sub>Angelos Chalaris</sub>](https://github.com/Chalarangelo) | [<img src="https://github.com/Pl4gue.png" width="100px;"/>](https://github.com/Pl4gue)<br/> [<sub>David Wu</sub>](https://github.com/Pl4gue) | [<img src="https://github.com/fejes713.png" width="100px;"/>](https://github.com/fejes713)<br/> [<sub>Stefan Feješ</sub>](https://github.com/fejes713)  | [<img src="https://github.com/kingdavidmartins.png" width="100px;"/>](https://github.com/kingdavidmartins)<br/> [<sub>King David Martins</sub>](https://github.com/iamsoorena) | [<img src="https://github.com/iamsoorena.png" width="100px;"/>](https://github.com/iamsoorena)<br/> [<sub>Soorena Soleimani</sub>](https://github.com/iamsoorena) |
-| --- | --- | --- | --- | --- |
-| [<img src="https://github.com/elderhsouza.png" width="100px;"/>](https://github.com/elderhsouza)<br/> [<sub>Elder Henrique Souza</sub>](https://github.com/elderhsouza) | [<img src="https://github.com/skatcat31.png" width="100px;"/>](https://github.com/skatcat31)<br/> [<sub>Robert Mennell</sub>](https://github.com/skatcat31) | [<img src="https://github.com/atomiks.png" width="100px;"/>](https://github.com/atomiks)<br/> [<sub>atomiks</sub>](https://github.com/atomiks)  |
-
-
-## Credits
-
-*Icons made by [Smashicons](https://www.flaticon.com/authors/smashicons) from [www.flaticon.com](https://www.flaticon.com/) is licensed by [CC 3.0 BY](http://creativecommons.org/licenses/by/3.0/).*
+## Collaborators
+
+| [<img src="https://github.com/Chalarangelo.png" width="100px;"/>](https://github.com/Chalarangelo)<br/> [<sub>Angelos Chalaris</sub>](https://github.com/Chalarangelo) | [<img src="https://github.com/Pl4gue.png" width="100px;"/>](https://github.com/Pl4gue)<br/> [<sub>David Wu</sub>](https://github.com/Pl4gue) | [<img src="https://github.com/fejes713.png" width="100px;"/>](https://github.com/fejes713)<br/> [<sub>Stefan Feješ</sub>](https://github.com/fejes713)  | [<img src="https://github.com/kingdavidmartins.png" width="100px;"/>](https://github.com/kingdavidmartins)<br/> [<sub>King David Martins</sub>](https://github.com/iamsoorena) | [<img src="https://github.com/iamsoorena.png" width="100px;"/>](https://github.com/iamsoorena)<br/> [<sub>Soorena Soleimani</sub>](https://github.com/iamsoorena) |
+| --- | --- | --- | --- | --- |
+| [<img src="https://github.com/elderhsouza.png" width="100px;"/>](https://github.com/elderhsouza)<br/> [<sub>Elder Henrique Souza</sub>](https://github.com/elderhsouza) | [<img src="https://github.com/skatcat31.png" width="100px;"/>](https://github.com/skatcat31)<br/> [<sub>Robert Mennell</sub>](https://github.com/skatcat31) | [<img src="https://github.com/atomiks.png" width="100px;"/>](https://github.com/atomiks)<br/> [<sub>atomiks</sub>](https://github.com/atomiks)  |
+
+
+## Credits
+
+*Icons made by [Smashicons](https://www.flaticon.com/authors/smashicons) from [www.flaticon.com](https://www.flaticon.com/) is licensed by [CC 3.0 BY](http://creativecommons.org/licenses/by/3.0/).*
 
diff --git a/docs/index.html b/docs/index.html
index 6f76914f9..5395dd4f0 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -40,7 +40,7 @@
             },1700);
           }
         }, false);
-      }</script></head><body onload="loader()"><a href="https://github.com/Chalarangelo/30-seconds-of-code" class="github-corner" aria-label="View source on Github"><svg width="90" height="90" viewBox="0 0 250 250" style="fill:#151513;color:#fff;position:absolute;top:0;border:0;right:0" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin:130px 106px" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style><header style="height:5.5rem"><h1 class="logo"><img src="favicon.png" style="height:4rem" alt="logo"/><span id="title">&nbsp;30 seconds of code</span> <small>Curated collection of useful JavaScript snippets that you can understand in 30 seconds or less.</small></h1><label for="doc-drawer-checkbox" class="button drawer-toggle" id="menu-toggle"></label></header><div class="row" style="height:calc(100vh - 5.875rem);overflow:hidden"><input id="doc-drawer-checkbox" class="drawer" value="on" type="checkbox"><nav class="col-md-4 col-lg-3" style="border-top:0"><div class="group"><input class="search" type="text" id="searchInput" onkeyup="search(this)"><label id="search-label">Search for snippet...</label></div><label for="doc-drawer-checkbox" class="button drawer-close"></label><h3>Adapter</h3><a class="sublink-1" tags="adapter" href="#call">call</a> <a class="sublink-1" tags="adapter" href="#collectinto">collectInto</a> <a class="sublink-1" tags="adapter" href="#flip">flip</a> <a class="sublink-1" tags="adapter" href="#pipefunctions">pipeFunctions</a> <a class="sublink-1" tags="adapter" href="#promisify">promisify</a> <a class="sublink-1" tags="adapter" href="#spreadover">spreadOver</a><h3>Array</h3><a class="sublink-1" tags="array" href="#chunk">chunk</a> <a class="sublink-1" tags="array" href="#compact">compact</a> <a class="sublink-1" tags="array" href="#countoccurrences">countOccurrences</a> <a class="sublink-1" tags="array" href="#deepflatten">deepFlatten</a> <a class="sublink-1" tags="array" href="#difference">difference</a> <a class="sublink-1" tags="array" href="#differencewith">differenceWith</a> <a class="sublink-1" tags="array" href="#distinctvaluesofarray">distinctValuesOfArray</a> <a class="sublink-1" tags="array" href="#dropelements">dropElements</a> <a class="sublink-1" tags="array" href="#dropright">dropRight</a> <a class="sublink-1" tags="array" href="#everynth">everyNth</a> <a class="sublink-1" tags="array" href="#filternonunique">filterNonUnique</a> <a class="sublink-1" tags="array" href="#flatten">flatten</a> <a class="sublink-1" tags="array" href="#flattendepth">flattenDepth</a> <a class="sublink-1" tags="array" href="#groupby">groupBy</a> <a class="sublink-1" tags="array" href="#head">head</a> <a class="sublink-1" tags="array" href="#initial">initial</a> <a class="sublink-1" tags="array" href="#initialize2darray">initialize2DArray</a> <a class="sublink-1" tags="array" href="#initializearraywithrange">initializeArrayWithRange</a> <a class="sublink-1" tags="array" href="#initializearraywithvalues">initializeArrayWithValues</a> <a class="sublink-1" tags="array" href="#intersection">intersection</a> <a class="sublink-1" tags="array" href="#issorted">isSorted</a> <a class="sublink-1" tags="array" href="#join">join</a> <a class="sublink-1" tags="array" href="#last">last</a> <a class="sublink-1" tags="array" href="#mapobject">mapObject</a> <a class="sublink-1" tags="array" href="#maxn">maxN</a> <a class="sublink-1" tags="array" href="#minn">minN</a> <a class="sublink-1" tags="array" href="#nthelement">nthElement</a> <a class="sublink-1" tags="array" href="#pick">pick</a> <a class="sublink-1" tags="array" href="#pull">pull</a> <a class="sublink-1" tags="array" href="#pullatindex">pullAtIndex</a> <a class="sublink-1" tags="array" href="#pullatvalue">pullAtValue</a> <a class="sublink-1" tags="array" href="#quicksort">quickSort</a> <a class="sublink-1" tags="array" href="#reducedfilter">reducedFilter</a> <a class="sublink-1" tags="array" href="#remove">remove</a> <a class="sublink-1" tags="array" href="#sample">sample</a> <a class="sublink-1" tags="array" href="#samplesize">sampleSize</a> <a class="sublink-1" tags="array" href="#shuffle">shuffle</a> <a class="sublink-1" tags="array" href="#similarity">similarity</a> <a class="sublink-1" tags="array" href="#sortedindex">sortedIndex</a> <a class="sublink-1" tags="array" href="#symmetricdifference">symmetricDifference</a> <a class="sublink-1" tags="array" href="#tail">tail</a> <a class="sublink-1" tags="array" href="#take">take</a> <a class="sublink-1" tags="array" href="#takeright">takeRight</a> <a class="sublink-1" tags="array" href="#union">union</a> <a class="sublink-1" tags="array" href="#without">without</a> <a class="sublink-1" tags="array" href="#zip">zip</a> <a class="sublink-1" tags="array" href="#zipobject">zipObject</a><h3>Browser</h3><a class="sublink-1" tags="browser" href="#arraytohtmllist">arrayToHtmlList</a> <a class="sublink-1" tags="browser" href="#bottomvisible">bottomVisible</a> <a class="sublink-1" tags="browser" href="#copytoclipboard">copyToClipboard</a> <a class="sublink-1" tags="browser" href="#currenturl">currentURL</a> <a class="sublink-1" tags="browser" href="#detectdevicetype">detectDeviceType</a> <a class="sublink-1" tags="browser" href="#elementisvisibleinviewport">elementIsVisibleInViewport</a> <a class="sublink-1" tags="browser" href="#getscrollposition">getScrollPosition</a> <a class="sublink-1" tags="browser" href="#getstyle">getStyle</a> <a class="sublink-1" tags="browser" href="#hasclass">hasClass</a> <a class="sublink-1" tags="browser" href="#hide">hide</a> <a class="sublink-1" tags="browser" href="#httpsredirect">httpsRedirect</a> <a class="sublink-1" tags="browser" href="#onuserinputchange">onUserInputChange</a> <a class="sublink-1" tags="browser" href="#redirect">redirect</a> <a class="sublink-1" tags="browser" href="#runasync">runAsync</a> <a class="sublink-1" tags="browser" href="#scrolltotop">scrollToTop</a> <a class="sublink-1" tags="browser" href="#setstyle">setStyle</a> <a class="sublink-1" tags="browser" href="#show">show</a> <a class="sublink-1" tags="browser" href="#speechsynthesis">speechSynthesis</a> <a class="sublink-1" tags="browser" href="#toggleclass">toggleClass</a> <a class="sublink-1" tags="browser" href="#uuidgeneratorbrowser">UUIDGeneratorBrowser</a><h3>Date</h3><a class="sublink-1" tags="date" href="#formatduration">formatDuration</a> <a class="sublink-1" tags="date" href="#getdaysdiffbetweendates">getDaysDiffBetweenDates</a> <a class="sublink-1" tags="date" href="#jsontodate">JSONToDate</a> <a class="sublink-1" tags="date" href="#toenglishdate">toEnglishDate</a> <a class="sublink-1" tags="date" href="#tomorrow">tomorrow</a><h3>Function</h3><a class="sublink-1" tags="function" href="#chainasync">chainAsync</a> <a class="sublink-1" tags="function" href="#compose">compose</a> <a class="sublink-1" tags="function" href="#curry">curry</a> <a class="sublink-1" tags="function" href="#defer">defer</a> <a class="sublink-1" tags="function" href="#functionname">functionName</a> <a class="sublink-1" tags="function" href="#memoize">memoize</a> <a class="sublink-1" tags="function" href="#once">once</a> <a class="sublink-1" tags="function" href="#runpromisesinseries">runPromisesInSeries</a> <a class="sublink-1" tags="function" href="#sleep">sleep</a><h3>Logic</h3><a class="sublink-1" tags="logic" href="#negate">negate</a><h3>Math</h3><a class="sublink-1" tags="math" href="#average">average</a> <a class="sublink-1" tags="math" href="#clampnumber">clampNumber</a> <a class="sublink-1" tags="math" href="#collatz">collatz</a> <a class="sublink-1" tags="math" href="#digitize">digitize</a> <a class="sublink-1" tags="math" href="#distance">distance</a> <a class="sublink-1" tags="math" href="#elo">elo</a> <a class="sublink-1" tags="math" href="#factorial">factorial</a> <a class="sublink-1" tags="math" href="#factors">factors</a> <a class="sublink-1" tags="math" href="#fibonacci">fibonacci</a> <a class="sublink-1" tags="math" href="#fibonaccicountuntilnum">fibonacciCountUntilNum</a> <a class="sublink-1" tags="math" href="#fibonacciuntilnum">fibonacciUntilNum</a> <a class="sublink-1" tags="math" href="#gcd">gcd</a> <a class="sublink-1" tags="math" href="#geometricprogression">geometricProgression</a> <a class="sublink-1" tags="math" href="#hammingdistance">hammingDistance</a> <a class="sublink-1" tags="math" href="#howmanytimes">howManyTimes</a> <a class="sublink-1" tags="math" href="#inrange">inRange</a> <a class="sublink-1" tags="math" href="#isarmstrongnumber">isArmstrongNumber</a> <a class="sublink-1" tags="math" href="#isdivisible">isDivisible</a> <a class="sublink-1" tags="math" href="#iseven">isEven</a> <a class="sublink-1" tags="math" href="#isprime">isPrime</a> <a class="sublink-1" tags="math" href="#lcm">lcm</a> <a class="sublink-1" tags="math" href="#luhncheck">luhnCheck</a> <a class="sublink-1" tags="math" href="#median">median</a> <a class="sublink-1" tags="math" href="#percentile">percentile</a> <a class="sublink-1" tags="math" href="#powerset">powerset</a> <a class="sublink-1" tags="math" href="#primes">primes</a> <a class="sublink-1" tags="math" href="#randomintegerinrange">randomIntegerInRange</a> <a class="sublink-1" tags="math" href="#randomnumberinrange">randomNumberInRange</a> <a class="sublink-1" tags="math" href="#round">round</a> <a class="sublink-1" tags="math" href="#solverpn">solveRPN</a> <a class="sublink-1" tags="math" href="#standarddeviation">standardDeviation</a> <a class="sublink-1" tags="math" href="#sum">sum</a> <a class="sublink-1" tags="math" href="#sumpower">sumPower</a><h3>Node</h3><a class="sublink-1" tags="node" href="#hasflags">hasFlags</a> <a class="sublink-1" tags="node" href="#istravisci">isTravisCI</a> <a class="sublink-1" tags="node" href="#jsontofile">JSONToFile</a> <a class="sublink-1" tags="node" href="#readfilelines">readFileLines</a> <a class="sublink-1" tags="node" href="#untildify">untildify</a> <a class="sublink-1" tags="node" href="#uuidgeneratornode">UUIDGeneratorNode</a><h3>Object</h3><a class="sublink-1" tags="object" href="#cleanobj">cleanObj</a> <a class="sublink-1" tags="object" href="#invertkeyvalues">invertKeyValues</a> <a class="sublink-1" tags="object" href="#lowercasekeys">lowercaseKeys</a> <a class="sublink-1" tags="object" href="#objectfrompairs">objectFromPairs</a> <a class="sublink-1" tags="object" href="#objecttopairs">objectToPairs</a> <a class="sublink-1" tags="object" href="#orderby">orderBy</a> <a class="sublink-1" tags="object" href="#select">select</a> <a class="sublink-1" tags="object" href="#shallowclone">shallowClone</a> <a class="sublink-1" tags="object" href="#size">size</a> <a class="sublink-1" tags="object" href="#truthcheckcollection">truthCheckCollection</a><h3>String</h3><a class="sublink-1" tags="string" href="#anagrams">anagrams</a> <a class="sublink-1" tags="string" href="#bytesize">byteSize</a> <a class="sublink-1" tags="string" href="#capitalize">capitalize</a> <a class="sublink-1" tags="string" href="#capitalizeeveryword">capitalizeEveryWord</a> <a class="sublink-1" tags="string" href="#countvowels">countVowels</a> <a class="sublink-1" tags="string" href="#escapehtml">escapeHTML</a> <a class="sublink-1" tags="string" href="#escaperegexp">escapeRegExp</a> <a class="sublink-1" tags="string" href="#fromcamelcase">fromCamelCase</a> <a class="sublink-1" tags="string" href="#isabsoluteurl">isAbsoluteURL</a> <a class="sublink-1" tags="string" href="#mask">mask</a> <a class="sublink-1" tags="string" href="#palindrome">palindrome</a> <a class="sublink-1" tags="string" href="#pluralize">pluralize</a> <a class="sublink-1" tags="string" href="#repeatstring">repeatString</a> <a class="sublink-1" tags="string" href="#reversestring">reverseString</a> <a class="sublink-1" tags="string" href="#sortcharactersinstring">sortCharactersInString</a> <a class="sublink-1" tags="string" href="#splitlines">splitLines</a> <a class="sublink-1" tags="string" href="#tocamelcase">toCamelCase</a> <a class="sublink-1" tags="string" href="#tokebabcase">toKebabCase</a> <a class="sublink-1" tags="string" href="#tosnakecase">toSnakeCase</a> <a class="sublink-1" tags="string" href="#truncatestring">truncateString</a> <a class="sublink-1" tags="string" href="#unescapehtml">unescapeHTML</a> <a class="sublink-1" tags="string" href="#words">words</a><h3>Utility</h3><a class="sublink-1" tags="utility" href="#cloneregexp">cloneRegExp</a> <a class="sublink-1" tags="utility" href="#coalesce">coalesce</a> <a class="sublink-1" tags="utility" href="#coalescefactory">coalesceFactory</a> <a class="sublink-1" tags="utility" href="#extendhex">extendHex</a> <a class="sublink-1" tags="utility" href="#gettype">getType</a> <a class="sublink-1" tags="utility" href="#geturlparameters">getURLParameters</a> <a class="sublink-1" tags="utility" href="#hextorgb">hexToRGB</a> <a class="sublink-1" tags="utility" href="#isarray">isArray</a> <a class="sublink-1" tags="utility" href="#isarraylike">isArrayLike</a> <a class="sublink-1" tags="utility" href="#isboolean">isBoolean</a> <a class="sublink-1" tags="utility" href="#isfunction">isFunction</a> <a class="sublink-1" tags="utility" href="#isnull">isNull</a> <a class="sublink-1" tags="utility" href="#isnumber">isNumber</a> <a class="sublink-1" tags="utility" href="#isprimitive">isPrimitive</a> <a class="sublink-1" tags="utility" href="#ispromiselike">isPromiseLike</a> <a class="sublink-1" tags="utility" href="#isstring">isString</a> <a class="sublink-1" tags="utility" href="#issymbol">isSymbol</a> <a class="sublink-1" tags="utility" href="#isvalidjson">isValidJSON</a> <a class="sublink-1" tags="utility" href="#prettybytes">prettyBytes</a> <a class="sublink-1" tags="utility" href="#randomhexcolorcode">randomHexColorCode</a> <a class="sublink-1" tags="utility" href="#rgbtohex">RGBToHex</a> <a class="sublink-1" tags="utility" href="#sdbm">sdbm</a> <a class="sublink-1" tags="utility" href="#timetaken">timeTaken</a> <a class="sublink-1" tags="utility" href="#todecimalmark">toDecimalMark</a> <a class="sublink-1" tags="utility" href="#toordinalsuffix">toOrdinalSuffix</a> <a class="sublink-1" tags="utility" href="#validatenumber">validateNumber</a> <a class="sublink-1" tags="utility" href="#yesno">yesNo</a></nav><main class="col-sm-12 col-md-8 col-lg-9" style="height:100%;overflow-y:auto;background:#eceef2;padding:0"><a id="top">&nbsp;</a><h2 style="text-align:center">Adapter</h2><div class="card fluid"><h3 id="call" class="section double-padded">call</h3><div class="section double-padded"><p>Given a key and a set of arguments, call them when given a context. Primarily useful in composition.</p><p>Use a closure to call a stored key with stored arguments.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">call</span> <span class="token operator">=</span> <span class="token punctuation">(</span>key<span class="token punctuation">,</span> <span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> context <span class="token operator">=></span> context<span class="token punctuation">[</span>key<span class="token punctuation">](</span><span class="token operator">...</span>args<span class="token punctuation">);</span>
+      }</script></head><body onload="loader()"><a href="https://github.com/Chalarangelo/30-seconds-of-code" class="github-corner" aria-label="View source on Github"><svg width="90" height="90" viewBox="0 0 250 250" style="fill:#151513;color:#fff;position:absolute;top:0;border:0;right:0" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin:130px 106px" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style><header style="height:5.5rem"><h1 class="logo"><img src="favicon.png" style="height:4rem" alt="logo"/><span id="title">&nbsp;30 seconds of code</span> <small>Curated collection of useful JavaScript snippets that you can understand in 30 seconds or less.</small></h1><label for="doc-drawer-checkbox" class="button drawer-toggle" id="menu-toggle"></label></header><div class="row" style="height:calc(100vh - 5.875rem);overflow:hidden"><input id="doc-drawer-checkbox" class="drawer" value="on" type="checkbox"><nav class="col-md-4 col-lg-3" style="border-top:0"><div class="group"><input class="search" type="text" id="searchInput" onkeyup="search(this)"><label id="search-label">Search for snippet...</label></div><label for="doc-drawer-checkbox" class="button drawer-close"></label><h3>Adapter</h3><a class="sublink-1" tags="adapter,function" href="#call">call</a> <a class="sublink-1" tags="adapter,function,array" href="#collectinto">collectInto</a> <a class="sublink-1" tags="adapter,function" href="#flip">flip</a> <a class="sublink-1" tags="adapter,function" href="#pipefunctions">pipeFunctions</a> <a class="sublink-1" tags="adapter,function,promise" href="#promisify">promisify</a> <a class="sublink-1" tags="adapter" href="#spreadover">spreadOver</a><h3>Array</h3><a class="sublink-1" tags="array" href="#chunk">chunk</a> <a class="sublink-1" tags="array" href="#compact">compact</a> <a class="sublink-1" tags="array" href="#countoccurrences">countOccurrences</a> <a class="sublink-1" tags="array,recursion" href="#deepflatten">deepFlatten</a> <a class="sublink-1" tags="array,math" href="#difference">difference</a> <a class="sublink-1" tags="array,function" href="#differencewith">differenceWith</a> <a class="sublink-1" tags="array" href="#distinctvaluesofarray">distinctValuesOfArray</a> <a class="sublink-1" tags="array,function" href="#dropelements">dropElements</a> <a class="sublink-1" tags="array" href="#dropright">dropRight</a> <a class="sublink-1" tags="array" href="#everynth">everyNth</a> <a class="sublink-1" tags="array" href="#filternonunique">filterNonUnique</a> <a class="sublink-1" tags="array" href="#flatten">flatten</a> <a class="sublink-1" tags="array,recursion" href="#flattendepth">flattenDepth</a> <a class="sublink-1" tags="array" href="#groupby">groupBy</a> <a class="sublink-1" tags="array" href="#head">head</a> <a class="sublink-1" tags="array" href="#initial">initial</a> <a class="sublink-1" tags="array" href="#initialize2darray">initialize2DArray</a> <a class="sublink-1" tags="array,math" href="#initializearraywithrange">initializeArrayWithRange</a> <a class="sublink-1" tags="array,amth" href="#initializearraywithvalues">initializeArrayWithValues</a> <a class="sublink-1" tags="array,math" href="#intersection">intersection</a> <a class="sublink-1" tags="array" href="#issorted">isSorted</a> <a class="sublink-1" tags="array" href="#join">join</a> <a class="sublink-1" tags="array" href="#last">last</a> <a class="sublink-1" tags="array,object" href="#mapobject">mapObject</a> <a class="sublink-1" tags="array,math" href="#maxn">maxN</a> <a class="sublink-1" tags="array,amth" href="#minn">minN</a> <a class="sublink-1" tags="array" href="#nthelement">nthElement</a> <a class="sublink-1" tags="array" href="#pick">pick</a> <a class="sublink-1" tags="array" href="#pull">pull</a> <a class="sublink-1" tags="array" href="#pullatindex">pullAtIndex</a> <a class="sublink-1" tags="array" href="#pullatvalue">pullAtValue</a> <a class="sublink-1" tags="array" href="#reducedfilter">reducedFilter</a> <a class="sublink-1" tags="array" href="#remove">remove</a> <a class="sublink-1" tags="array,random" href="#sample">sample</a> <a class="sublink-1" tags="array,random" href="#samplesize">sampleSize</a> <a class="sublink-1" tags="array,random" href="#shuffle">shuffle</a> <a class="sublink-1" tags="array,math" href="#similarity">similarity</a> <a class="sublink-1" tags="array,math" href="#sortedindex">sortedIndex</a> <a class="sublink-1" tags="array,math" href="#symmetricdifference">symmetricDifference</a> <a class="sublink-1" tags="array" href="#tail">tail</a> <a class="sublink-1" tags="array" href="#take">take</a> <a class="sublink-1" tags="array" href="#takeright">takeRight</a> <a class="sublink-1" tags="array,math" href="#union">union</a> <a class="sublink-1" tags="array" href="#without">without</a> <a class="sublink-1" tags="array" href="#zip">zip</a> <a class="sublink-1" tags="array,object" href="#zipobject">zipObject</a><h3>Browser</h3><a class="sublink-1" tags="browser,array" href="#arraytohtmllist">arrayToHtmlList</a> <a class="sublink-1" tags="browser" href="#bottomvisible">bottomVisible</a> <a class="sublink-1" tags="browser,string,advanced" href="#copytoclipboard">copyToClipboard</a> <a class="sublink-1" tags="browser,url" href="#currenturl">currentURL</a> <a class="sublink-1" tags="browser" href="#detectdevicetype">detectDeviceType</a> <a class="sublink-1" tags="browser" href="#elementisvisibleinviewport">elementIsVisibleInViewport</a> <a class="sublink-1" tags="browser" href="#getscrollposition">getScrollPosition</a> <a class="sublink-1" tags="browser,css" href="#getstyle">getStyle</a> <a class="sublink-1" tags="browser,css" href="#hasclass">hasClass</a> <a class="sublink-1" tags="browser,css" href="#hide">hide</a> <a class="sublink-1" tags="browser,url" href="#httpsredirect">httpsRedirect</a> <a class="sublink-1" tags="browser,advanced" href="#onuserinputchange">onUserInputChange</a> <a class="sublink-1" tags="browser,url" href="#redirect">redirect</a> <a class="sublink-1" tags="browser,function,advanced,promise,url" href="#runasync">runAsync</a> <a class="sublink-1" tags="browser" href="#scrolltotop">scrollToTop</a> <a class="sublink-1" tags="browser" href="#setstyle">setStyle</a> <a class="sublink-1" tags="browser,css" href="#show">show</a> <a class="sublink-1" tags="browser" href="#toggleclass">toggleClass</a> <a class="sublink-1" tags="browser,utility,random" href="#uuidgeneratorbrowser">UUIDGeneratorBrowser</a><h3>Date</h3><a class="sublink-1" tags="date,math,string,utility" href="#formatduration">formatDuration</a> <a class="sublink-1" tags="date" href="#getdaysdiffbetweendates">getDaysDiffBetweenDates</a> <a class="sublink-1" tags="date,string" href="#toenglishdate">toEnglishDate</a> <a class="sublink-1" tags="date" href="#tomorrow">tomorrow</a><h3>Function</h3><a class="sublink-1" tags="function" href="#chainasync">chainAsync</a> <a class="sublink-1" tags="function" href="#compose">compose</a> <a class="sublink-1" tags="function,recursion" href="#curry">curry</a> <a class="sublink-1" tags="function" href="#defer">defer</a> <a class="sublink-1" tags="function,utility" href="#functionname">functionName</a> <a class="sublink-1" tags="function" href="#memoize">memoize</a> <a class="sublink-1" tags="function" href="#once">once</a> <a class="sublink-1" tags="function,promise" href="#runpromisesinseries">runPromisesInSeries</a> <a class="sublink-1" tags="function,promise" href="#sleep">sleep</a><h3>Logic</h3><a class="sublink-1" tags="logic,function" href="#negate">negate</a><h3>Math</h3><a class="sublink-1" tags="math,array" href="#average">average</a> <a class="sublink-1" tags="math" href="#clampnumber">clampNumber</a> <a class="sublink-1" tags="math,array" href="#digitize">digitize</a> <a class="sublink-1" tags="math" href="#distance">distance</a> <a class="sublink-1" tags="math,array,advanced" href="#elo">elo</a> <a class="sublink-1" tags="math,recursion" href="#factorial">factorial</a> <a class="sublink-1" tags="math,array" href="#fibonacci">fibonacci</a> <a class="sublink-1" tags="math,recursion" href="#gcd">gcd</a> <a class="sublink-1" tags="math" href="#geometricprogression">geometricProgression</a> <a class="sublink-1" tags="math" href="#hammingdistance">hammingDistance</a> <a class="sublink-1" tags="math" href="#inrange">inRange</a> <a class="sublink-1" tags="math" href="#isdivisible">isDivisible</a> <a class="sublink-1" tags="math" href="#iseven">isEven</a> <a class="sublink-1" tags="math" href="#isprime">isPrime</a> <a class="sublink-1" tags="math,recursion" href="#lcm">lcm</a> <a class="sublink-1" tags="math,utility" href="#luhncheck">luhnCheck</a> <a class="sublink-1" tags="math,array" href="#median">median</a> <a class="sublink-1" tags="math" href="#percentile">percentile</a> <a class="sublink-1" tags="math" href="#powerset">powerset</a> <a class="sublink-1" tags="math,array" href="#primes">primes</a> <a class="sublink-1" tags="math,utility,random" href="#randomintegerinrange">randomIntegerInRange</a> <a class="sublink-1" tags="math,utility,random" href="#randomnumberinrange">randomNumberInRange</a> <a class="sublink-1" tags="math" href="#round">round</a> <a class="sublink-1" tags="math,utility" href="#sdbm">sdbm</a> <a class="sublink-1" tags="math,array" href="#standarddeviation">standardDeviation</a> <a class="sublink-1" tags="math,array" href="#sum">sum</a> <a class="sublink-1" tags="math" href="#sumpower">sumPower</a><h3>Node</h3><a class="sublink-1" tags="node" href="#hasflags">hasFlags</a> <a class="sublink-1" tags="node" href="#istravisci">isTravisCI</a> <a class="sublink-1" tags="node,json" href="#jsontofile">JSONToFile</a> <a class="sublink-1" tags="node,array,string" href="#readfilelines">readFileLines</a> <a class="sublink-1" tags="node,string" href="#untildify">untildify</a> <a class="sublink-1" tags="node,utility,random" href="#uuidgeneratornode">UUIDGeneratorNode</a><h3>Object</h3><a class="sublink-1" tags="object,json" href="#cleanobj">cleanObj</a> <a class="sublink-1" tags="object" href="#invertkeyvalues">invertKeyValues</a> <a class="sublink-1" tags="object" href="#lowercasekeys">lowercaseKeys</a> <a class="sublink-1" tags="object,array" href="#objectfrompairs">objectFromPairs</a> <a class="sublink-1" tags="object,array" href="#objecttopairs">objectToPairs</a> <a class="sublink-1" tags="object,array" href="#orderby">orderBy</a> <a class="sublink-1" tags="object" href="#select">select</a> <a class="sublink-1" tags="object" href="#shallowclone">shallowClone</a> <a class="sublink-1" tags="object,array,string" href="#size">size</a> <a class="sublink-1" tags="object,logic,array" href="#truthcheckcollection">truthCheckCollection</a><h3>String</h3><a class="sublink-1" tags="string,recursion" href="#anagrams">anagrams</a> <a class="sublink-1" tags="string" href="#bytesize">byteSize</a> <a class="sublink-1" tags="string,array" href="#capitalize">capitalize</a> <a class="sublink-1" tags="string,regexp" href="#capitalizeeveryword">capitalizeEveryWord</a> <a class="sublink-1" tags="string" href="#countvowels">countVowels</a> <a class="sublink-1" tags="string,browser,regexp" href="#escapehtml">escapeHTML</a> <a class="sublink-1" tags="string,regexp" href="#escaperegexp">escapeRegExp</a> <a class="sublink-1" tags="string" href="#fromcamelcase">fromCamelCase</a> <a class="sublink-1" tags="string,utility,browser,url" href="#isabsoluteurl">isAbsoluteURL</a> <a class="sublink-1" tags="string,utility,regexp" href="#mask">mask</a> <a class="sublink-1" tags="string" href="#palindrome">palindrome</a> <a class="sublink-1" tags="string" href="#pluralize">pluralize</a> <a class="sublink-1" tags="string,array" href="#reversestring">reverseString</a> <a class="sublink-1" tags="string" href="#sortcharactersinstring">sortCharactersInString</a> <a class="sublink-1" tags="string" href="#splitlines">splitLines</a> <a class="sublink-1" tags="string,regexp" href="#tocamelcase">toCamelCase</a> <a class="sublink-1" tags="string,regexp" href="#tokebabcase">toKebabCase</a> <a class="sublink-1" tags="string,regexp" href="#tosnakecase">toSnakeCase</a> <a class="sublink-1" tags="string" href="#truncatestring">truncateString</a> <a class="sublink-1" tags="string,browser" href="#unescapehtml">unescapeHTML</a> <a class="sublink-1" tags="string,regexp" href="#words">words</a><h3>Type</h3><a class="sublink-1" tags="type" href="#gettype">getType</a> <a class="sublink-1" tags="type,array" href="#isarray">isArray</a> <a class="sublink-1" tags="type,array" href="#isarraylike">isArrayLike</a> <a class="sublink-1" tags="type" href="#isboolean">isBoolean</a> <a class="sublink-1" tags="type,function" href="#isfunction">isFunction</a> <a class="sublink-1" tags="type" href="#isnull">isNull</a> <a class="sublink-1" tags="type,math" href="#isnumber">isNumber</a> <a class="sublink-1" tags="type,function,array,string" href="#isprimitive">isPrimitive</a> <a class="sublink-1" tags="type,function,promise" href="#ispromiselike">isPromiseLike</a> <a class="sublink-1" tags="type,string" href="#isstring">isString</a> <a class="sublink-1" tags="type" href="#issymbol">isSymbol</a> <a class="sublink-1" tags="type,json" href="#isvalidjson">isValidJSON</a><h3>Utility</h3><a class="sublink-1" tags="utility,regexp" href="#cloneregexp">cloneRegExp</a> <a class="sublink-1" tags="utility" href="#coalesce">coalesce</a> <a class="sublink-1" tags="utility" href="#coalescefactory">coalesceFactory</a> <a class="sublink-1" tags="utility,string" href="#extendhex">extendHex</a> <a class="sublink-1" tags="utility,browser,string,url" href="#geturlparameters">getURLParameters</a> <a class="sublink-1" tags="utility,string,math,advanced" href="#hextorgb">hexToRGB</a> <a class="sublink-1" tags="utility,string,math" href="#prettybytes">prettyBytes</a> <a class="sublink-1" tags="utility,random" href="#randomhexcolorcode">randomHexColorCode</a> <a class="sublink-1" tags="utility" href="#rgbtohex">RGBToHex</a> <a class="sublink-1" tags="utility" href="#timetaken">timeTaken</a> <a class="sublink-1" tags="utility,math" href="#todecimalmark">toDecimalMark</a> <a class="sublink-1" tags="utility,math" href="#toordinalsuffix">toOrdinalSuffix</a> <a class="sublink-1" tags="utility,math" href="#validatenumber">validateNumber</a> <a class="sublink-1" tags="utility,regexp" href="#yesno">yesNo</a></nav><main class="col-sm-12 col-md-8 col-lg-9" style="height:100%;overflow-y:auto;background:#eceef2;padding:0"><a id="top">&nbsp;</a><h2 style="text-align:center">Adapter</h2><div class="card fluid"><h3 id="call" class="section double-padded">call</h3><div class="section double-padded"><p>Given a key and a set of arguments, call them when given a context. Primarily useful in composition.</p><p>Use a closure to call a stored key with stored arguments.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">call</span> <span class="token operator">=</span> <span class="token punctuation">(</span>key<span class="token punctuation">,</span> <span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> context <span class="token operator">=></span> context<span class="token punctuation">[</span>key<span class="token punctuation">](</span><span class="token operator">...</span>args<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js">Promise<span class="token punctuation">.</span><span class="token function">resolve</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">])
   .</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token function">call</span><span class="token punctuation">(</span><span class="token string">'map'</span><span class="token punctuation">,</span> x <span class="token operator">=></span> <span class="token number">2</span> <span class="token operator">*</span> x<span class="token punctuation">))
   .</span><span class="token function">then</span><span class="token punctuation">(</span>console<span class="token punctuation">.</span>log<span class="token punctuation">);</span> <span class="token comment">//[ 2, 4, 6 ]</span>
@@ -54,7 +54,7 @@ Promise<span class="token punctuation">.</span><span class="token function">reso
 <span class="token keyword">let</span> p2 <span class="token operator">=</span> Promise<span class="token punctuation">.</span><span class="token function">resolve</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">);</span>
 <span class="token keyword">let</span> p3 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Promise</span><span class="token punctuation">(</span>resolve <span class="token operator">=></span> <span class="token function">setTimeout</span><span class="token punctuation">(</span>resolve<span class="token punctuation">,</span> <span class="token number">2000</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">));</span>
 <span class="token function">Pall</span><span class="token punctuation">(</span>p1<span class="token punctuation">,</span> p2<span class="token punctuation">,</span> p3<span class="token punctuation">).</span><span class="token function">then</span><span class="token punctuation">(</span>console<span class="token punctuation">.</span>log<span class="token punctuation">);</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="flip" class="section double-padded">flip</h3><div class="section double-padded"><p>Flip takes a function as an argument, then makes the first argument the last</p><p>Return a closure that takes variadic inputs, and splices the last argument to make it the first argument before applying the rest.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">flip</span> <span class="token operator">=</span> fn <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">fn</span><span class="token punctuation">(</span>args<span class="token punctuation">.</span><span class="token function">pop</span><span class="token punctuation">(),</span> <span class="token operator">...</span>args<span class="token punctuation">);</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="flip" class="section double-padded">flip</h3><div class="section double-padded"><p>Flip takes a function as an argument, then makes the first argument the last.</p><p>Return a closure that takes variadic inputs, and splices the last argument to make it the first argument before applying the rest.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">flip</span> <span class="token operator">=</span> fn <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">fn</span><span class="token punctuation">(</span>args<span class="token punctuation">.</span><span class="token function">pop</span><span class="token punctuation">(),</span> <span class="token operator">...</span>args<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">let</span> a <span class="token operator">=</span> <span class="token punctuation">{</span> name<span class="token punctuation">:</span> <span class="token string">'John Smith'</span> <span class="token punctuation">};</span>
 <span class="token keyword">let</span> b <span class="token operator">=</span> <span class="token punctuation">{};</span>
 <span class="token keyword">const</span> mergeFrom <span class="token operator">=</span> <span class="token function">flip</span><span class="token punctuation">(</span>Object<span class="token punctuation">.</span>assign<span class="token punctuation">);</span>
@@ -83,7 +83,7 @@ Object<span class="token punctuation">.</span><span class="token function">assig
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">chunk</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">],</span> <span class="token number">2</span><span class="token punctuation">);</span> <span class="token comment">// [[1,2],[3,4],[5]]</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="compact" class="section double-padded">compact</h3><div class="section double-padded"><p>Removes falsey values from an array.</p><p>Use <code>Array.filter()</code> to filter out falsey values (<code>false</code>, <code>null</code>, <code>0</code>, <code>&quot;&quot;</code>, <code>undefined</code>, and <code>NaN</code>).</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">compact</span> <span class="token operator">=</span> arr <span class="token operator">=></span> arr<span class="token punctuation">.</span><span class="token function">filter</span><span class="token punctuation">(</span>Boolean<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">compact</span><span class="token punctuation">([</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token boolean">false</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token string">'a'</span><span class="token punctuation">,</span> <span class="token string">'e'</span> <span class="token operator">*</span> <span class="token number">23</span><span class="token punctuation">,</span> <span class="token number">NaN</span><span class="token punctuation">,</span> <span class="token string">'s'</span><span class="token punctuation">,</span> <span class="token number">34</span><span class="token punctuation">]);</span> <span class="token comment">// [ 1, 2, 3, 'a', 's', 34 ]</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="countoccurrences" class="section double-padded">countOccurrences</h3><div class="section double-padded"><p>Counts the occurrences of a value in an array.</p><p>Use <code>Array.reduce()</code> to increment a counter each time you encounter the specific value inside the array.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">countOccurrences</span> <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> value<span class="token punctuation">)</span> <span class="token operator">=></span> arr<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>a<span class="token punctuation">,</span> v<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span>v <span class="token operator">===</span> value <span class="token operator">?</span> a <span class="token operator">+</span> <span class="token number">1</span> <span class="token punctuation">:</span> a <span class="token operator">+</span> <span class="token number">0</span><span class="token punctuation">),</span> <span class="token number">0</span><span class="token punctuation">);</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="countoccurrences" class="section double-padded">countOccurrences</h3><div class="section double-padded"><p>Counts the occurrences of a value in an array.</p><p>Use <code>Array.reduce()</code> to increment a counter each time you encounter the specific value inside the array.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">countOccurrences</span> <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> val<span class="token punctuation">)</span> <span class="token operator">=></span> arr<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>a<span class="token punctuation">,</span> v<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span>v <span class="token operator">===</span> val <span class="token operator">?</span> a <span class="token operator">+</span> <span class="token number">1</span> <span class="token punctuation">:</span> a <span class="token operator">+</span> <span class="token number">0</span><span class="token punctuation">),</span> <span class="token number">0</span><span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">countOccurrences</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">],</span> <span class="token number">1</span><span class="token punctuation">);</span> <span class="token comment">// 3</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="deepflatten" class="section double-padded">deepFlatten</h3><div class="section double-padded"><p>Deep flattens an array.</p><p>Use recursion. Use <code>Array.concat()</code> with an empty array (<code>[]</code>) and the spread operator (<code>...</code>) to flatten an array. Recursively flatten each element that is an array.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">deepFlatten</span> <span class="token operator">=</span> arr <span class="token operator">=></span> <span class="token punctuation">[].</span><span class="token function">concat</span><span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span>v <span class="token operator">=></span> <span class="token punctuation">(</span>Array<span class="token punctuation">.</span><span class="token function">isArray</span><span class="token punctuation">(</span>v<span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token function">deepFlatten</span><span class="token punctuation">(</span>v<span class="token punctuation">) :</span> v<span class="token punctuation">)));</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">deepFlatten</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">, [</span><span class="token number">2</span><span class="token punctuation">], [[</span><span class="token number">3</span><span class="token punctuation">],</span> <span class="token number">4</span><span class="token punctuation">],</span> <span class="token number">5</span><span class="token punctuation">]);</span> <span class="token comment">// [1,2,3,4,5]</span>
@@ -109,7 +109,7 @@ Object<span class="token punctuation">.</span><span class="token function">assig
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">everyNth</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">6</span><span class="token punctuation">],</span> <span class="token number">2</span><span class="token punctuation">);</span> <span class="token comment">// [ 2, 4, 6 ]</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="filternonunique" class="section double-padded">filterNonUnique</h3><div class="section double-padded"><p>Filters out the non-unique values in an array.</p><p>Use <code>Array.filter()</code> for an array containing only the unique values.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">filterNonUnique</span> <span class="token operator">=</span> arr <span class="token operator">=></span> arr<span class="token punctuation">.</span><span class="token function">filter</span><span class="token punctuation">(</span>i <span class="token operator">=></span> arr<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span>i<span class="token punctuation">)</span> <span class="token operator">===</span> arr<span class="token punctuation">.</span><span class="token function">lastIndexOf</span><span class="token punctuation">(</span>i<span class="token punctuation">));</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">filterNonUnique</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]);</span> <span class="token comment">// [1,3,5]</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="flatten" class="section double-padded">flatten</h3><div class="section double-padded"><p>Flattens an array.</p><p>Use a new array and concatenate it with the spread input array causing a shallow denesting of any contained arrays.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">flatten</span> <span class="token operator">=</span> arr <span class="token operator">=></span> <span class="token punctuation">[].</span><span class="token function">concat</span><span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">);</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="flatten" class="section double-padded">flatten</h3><div class="section double-padded"><p>Flattens an array.</p><p>Use a new array, <code>Array.concat()</code> and the spread operator (<code>...</code>) to cause a shallow denesting of any contained arrays.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">flatten</span> <span class="token operator">=</span> arr <span class="token operator">=></span> <span class="token punctuation">[].</span><span class="token function">concat</span><span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">flatten</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">, [</span><span class="token number">2</span><span class="token punctuation">],</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">]);</span> <span class="token comment">// [1,2,3,4]</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="flattendepth" class="section double-padded">flattenDepth</h3><div class="section double-padded"><p>Flattens an array up to the specified depth.</p><p>Use recursion, decrementing <code>depth</code> by 1 for each level of depth. Use <code>Array.reduce()</code> and <code>Array.concat()</code> to merge elements or arrays. Base case, for <code>depth</code> equal to <code>1</code> stops recursion. Omit the second element, <code>depth</code> to flatten only to a depth of <code>1</code> (single flatten).</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">flattenDepth</span> <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> depth <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">=></span>
   depth <span class="token operator">!=</span> <span class="token number">1</span>
@@ -137,7 +137,7 @@ Object<span class="token punctuation">.</span><span class="token function">assig
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">initializeArrayWithRange</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">);</span> <span class="token comment">// [0,1,2,3,4,5]</span>
 <span class="token function">initializeArrayWithRange</span><span class="token punctuation">(</span><span class="token number">7</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">);</span> <span class="token comment">// [3,4,5,6,7]</span>
 <span class="token function">initializeArrayWithRange</span><span class="token punctuation">(</span><span class="token number">9</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">);</span> <span class="token comment">// [0,2,4,6,8]</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="initializearraywithvalues" class="section double-padded">initializeArrayWithValues</h3><div class="section double-padded"><p>Initializes and fills an array with the specified values.</p><p>Use <code>Array(n)</code> to create an array of the desired length, <code>fill(v)</code> to fill it with the desired values. You can omit <code>value</code> to use a default value of <code>0</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">initializeArrayWithValues</span> <span class="token operator">=</span> <span class="token punctuation">(</span>n<span class="token punctuation">,</span> value <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">Array</span><span class="token punctuation">(</span>n<span class="token punctuation">).</span><span class="token function">fill</span><span class="token punctuation">(</span>value<span class="token punctuation">);</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="initializearraywithvalues" class="section double-padded">initializeArrayWithValues</h3><div class="section double-padded"><p>Initializes and fills an array with the specified values.</p><p>Use <code>Array(n)</code> to create an array of the desired length, <code>fill(v)</code> to fill it with the desired values. You can omit <code>val</code> to use a default value of <code>0</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">initializeArrayWithValues</span> <span class="token operator">=</span> <span class="token punctuation">(</span>n<span class="token punctuation">,</span> val <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">Array</span><span class="token punctuation">(</span>n<span class="token punctuation">).</span><span class="token function">fill</span><span class="token punctuation">(</span>val<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">initializeArrayWithValues</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">);</span> <span class="token comment">// [2,2,2,2,2]</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="intersection" class="section double-padded">intersection</h3><div class="section double-padded"><p>Returns a list of elements that exist in both arrays.</p><p>Create a <code>Set</code> from <code>b</code>, then use <code>Array.filter()</code> on <code>a</code> to only keep values contained in <code>b</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">intersection</span> <span class="token operator">=</span> <span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">const</span> s <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Set</span><span class="token punctuation">(</span>b<span class="token punctuation">);</span>
@@ -213,16 +213,6 @@ Object<span class="token punctuation">.</span><span class="token function">assig
 };</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">let</span> myArray <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token string">'a'</span><span class="token punctuation">,</span> <span class="token string">'b'</span><span class="token punctuation">,</span> <span class="token string">'c'</span><span class="token punctuation">,</span> <span class="token string">'d'</span><span class="token punctuation">];</span>
 <span class="token keyword">let</span> pulled <span class="token operator">=</span> <span class="token function">pullAtValue</span><span class="token punctuation">(</span>myArray<span class="token punctuation">, [</span><span class="token string">'b'</span><span class="token punctuation">,</span> <span class="token string">'d'</span><span class="token punctuation">]);</span> <span class="token comment">// myArray = [ 'a', 'c' ] , pulled = [ 'b', 'd' ]</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="quicksort" class="section double-padded">quickSort</h3><div class="section double-padded"><p>QuickSort an Array (ascending sort by default).</p><p>Use recursion. Use <code>Array.filter</code> and spread operator (<code>...</code>) to create an array that all elements with values less than the pivot come before the pivot, and all elements with values greater than the pivot come after it. If the parameter <code>desc</code> is truthy, return array sorts in descending order.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">quickSort</span> <span class="token operator">=</span> <span class="token punctuation">([</span>n<span class="token punctuation">,</span> <span class="token operator">...</span>nums<span class="token punctuation">],</span> desc<span class="token punctuation">)</span> <span class="token operator">=></span>
-  <span class="token function">isNaN</span><span class="token punctuation">(</span>n<span class="token punctuation">)</span>
-    <span class="token operator">?</span> <span class="token punctuation">[]
-    : [</span>
-        <span class="token operator">...</span><span class="token function">quickSort</span><span class="token punctuation">(</span>nums<span class="token punctuation">.</span><span class="token function">filter</span><span class="token punctuation">(</span>v <span class="token operator">=></span> <span class="token punctuation">(</span>desc <span class="token operator">?</span> v <span class="token operator">></span> n <span class="token punctuation">:</span> v <span class="token operator">&lt;=</span> n<span class="token punctuation">)),</span> desc<span class="token punctuation">),</span>
-        n<span class="token punctuation">,</span>
-        <span class="token operator">...</span><span class="token function">quickSort</span><span class="token punctuation">(</span>nums<span class="token punctuation">.</span><span class="token function">filter</span><span class="token punctuation">(</span>v <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">!</span>desc <span class="token operator">?</span> v <span class="token operator">></span> n <span class="token punctuation">:</span> v <span class="token operator">&lt;=</span> n<span class="token punctuation">)),</span> desc<span class="token punctuation">)
-      ];</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">quickSort</span><span class="token punctuation">([</span><span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]);</span> <span class="token comment">// [1,2,3,4]</span>
-<span class="token function">quickSort</span><span class="token punctuation">([</span><span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">],</span> <span class="token boolean">true</span><span class="token punctuation">);</span> <span class="token comment">// [4,3,2,1]</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="reducedfilter" class="section double-padded">reducedFilter</h3><div class="section double-padded"><p>Filter an array of objects based on a condition while also filtering out unspecified keys.</p><p>Use <code>Array.filter()</code> to filter the array based on the predicate <code>fn</code> so that it returns the objects for which the condition returned a truthy value. On the filtered array, use <code>Array.map()</code> to return the new object using <code>Array.reduce()</code> to filter out the keys which were not supplied as the <code>keys</code> argument.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">reducedFilter</span> <span class="token operator">=</span> <span class="token punctuation">(</span>data<span class="token punctuation">,</span> keys<span class="token punctuation">,</span> fn<span class="token punctuation">)</span> <span class="token operator">=></span>
   data<span class="token punctuation">.</span><span class="token function">filter</span><span class="token punctuation">(</span>fn<span class="token punctuation">).</span><span class="token function">map</span><span class="token punctuation">(</span>el <span class="token operator">=></span>
     keys<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>acc<span class="token punctuation">,</span> key<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
@@ -264,7 +254,7 @@ Object<span class="token punctuation">.</span><span class="token function">assig
 };</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">sampleSize</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">],</span> <span class="token number">2</span><span class="token punctuation">);</span> <span class="token comment">// [3,1]</span>
 <span class="token function">sampleSize</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">],</span> <span class="token number">4</span><span class="token punctuation">);</span> <span class="token comment">// [2,3,1]</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="shuffle" class="section double-padded">shuffle</h3><div class="section double-padded"><p>Randomizes the order of the values of an array, returning a new array.</p><p>Uses the Fisher-Yates algorithm to reorder the elements of the array, based on the <a href="https://github.com/lodash/lodash/blob/b2ea6b1cd251796dcb5f9700c4911a7b6223920b/shuffle.js">Lodash implementation</a>, but as a pure function.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">shuffle</span> <span class="token operator">=</span> <span class="token punctuation">([</span><span class="token operator">...</span>arr<span class="token punctuation">])</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="shuffle" class="section double-padded">shuffle</h3><div class="section double-padded"><p>Randomizes the order of the values of an array, returning a new array.</p><p>Uses the <a href="https://github.com/chalarangelo/30-seconds-of-code#shuffle">Fisher-Yates algorithm</a> to reorder the elements of the array.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">shuffle</span> <span class="token operator">=</span> <span class="token punctuation">([</span><span class="token operator">...</span>arr<span class="token punctuation">])</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">let</span> m <span class="token operator">=</span> arr<span class="token punctuation">.</span>length<span class="token punctuation">;</span>
   <span class="token keyword">while</span> <span class="token punctuation">(</span>m<span class="token punctuation">) {</span>
     <span class="token keyword">const</span> i <span class="token operator">=</span> Math<span class="token punctuation">.</span><span class="token function">floor</span><span class="token punctuation">(</span>Math<span class="token punctuation">.</span><span class="token function">random</span><span class="token punctuation">()</span> <span class="token operator">*</span> m<span class="token operator">--</span><span class="token punctuation">);
@@ -274,7 +264,7 @@ Object<span class="token punctuation">.</span><span class="token function">assig
 };</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> foo <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">];</span>
 <span class="token function">shuffle</span><span class="token punctuation">(</span>foo<span class="token punctuation">);</span> <span class="token comment">// [2,3,1], foo = [1,2,3]</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="similarity" class="section double-padded">similarity</h3><div class="section double-padded"><p>Returns an array of elements that appear in both arrays.</p><p>Use <code>filter()</code> to remove values that are not part of <code>values</code>, determined using <code>includes()</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">similarity</span> <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> values<span class="token punctuation">)</span> <span class="token operator">=></span> arr<span class="token punctuation">.</span><span class="token function">filter</span><span class="token punctuation">(</span>v <span class="token operator">=></span> values<span class="token punctuation">.</span><span class="token function">includes</span><span class="token punctuation">(</span>v<span class="token punctuation">));</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="similarity" class="section double-padded">similarity</h3><div class="section double-padded"><p>Returns an array of elements that appear in both arrays.</p><p>Use <code>Array.filter()</code> to remove values that are not part of <code>values</code>, determined using <code>Array.includes()</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">similarity</span> <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> values<span class="token punctuation">)</span> <span class="token operator">=></span> arr<span class="token punctuation">.</span><span class="token function">filter</span><span class="token punctuation">(</span>v <span class="token operator">=></span> values<span class="token punctuation">.</span><span class="token function">includes</span><span class="token punctuation">(</span>v<span class="token punctuation">));</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">similarity</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">], [</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">]);</span> <span class="token comment">// [1,2]</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="sortedindex" class="section double-padded">sortedIndex</h3><div class="section double-padded"><p>Returns the lowest index at which value should be inserted into array in order to maintain its sort order.</p><p>Check if the array is sorted in descending order (loosely). Use <code>Array.findIndex()</code> to find the appropriate index where the element should be inserted.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">sortedIndex</span> <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> n<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">const</span> isDescending <span class="token operator">=</span> arr<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span> <span class="token operator">></span> arr<span class="token punctuation">[</span>arr<span class="token punctuation">.</span>length <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">];</span>
@@ -289,7 +279,7 @@ Object<span class="token punctuation">.</span><span class="token function">assig
   <span class="token keyword">return</span> <span class="token punctuation">[</span><span class="token operator">...</span>a<span class="token punctuation">.</span><span class="token function">filter</span><span class="token punctuation">(</span>x <span class="token operator">=> !</span>sB<span class="token punctuation">.</span><span class="token function">has</span><span class="token punctuation">(</span>x<span class="token punctuation">)),</span> <span class="token operator">...</span>b<span class="token punctuation">.</span><span class="token function">filter</span><span class="token punctuation">(</span>x <span class="token operator">=> !</span>sA<span class="token punctuation">.</span><span class="token function">has</span><span class="token punctuation">(</span>x<span class="token punctuation">))];
 };</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">symmetricDifference</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">], [</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">]);</span> <span class="token comment">// [3,4]</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="tail" class="section double-padded">tail</h3><div class="section double-padded"><p>Returns all elements in an array except for the first one.</p><p>Return <code>arr.slice(1)</code> if the array's <code>length</code> is more than <code>1</code>, otherwise, return the whole array.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">tail</span> <span class="token operator">=</span> arr <span class="token operator">=></span> <span class="token punctuation">(</span>arr<span class="token punctuation">.</span>length <span class="token operator">></span> <span class="token number">1</span> <span class="token operator">?</span> arr<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">) :</span> arr<span class="token punctuation">);</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="tail" class="section double-padded">tail</h3><div class="section double-padded"><p>Returns all elements in an array except for the first one.</p><p>Return <code>Array.slice(1)</code> if the array's <code>length</code> is more than <code>1</code>, otherwise, return the whole array.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">tail</span> <span class="token operator">=</span> arr <span class="token operator">=></span> <span class="token punctuation">(</span>arr<span class="token punctuation">.</span>length <span class="token operator">></span> <span class="token number">1</span> <span class="token operator">?</span> arr<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">) :</span> arr<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">tail</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">]);</span> <span class="token comment">// [2,3]</span>
 <span class="token function">tail</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">]);</span> <span class="token comment">// [1]</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="take" class="section double-padded">take</h3><div class="section double-padded"><p>Returns an array with n elements removed from the beginning.</p><p>Use <code>Array.slice()</code> to create a slice of the array with <code>n</code> elements taken from the beginning.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">take</span> <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> n <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">=></span> arr<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> n<span class="token punctuation">);</span>
@@ -321,7 +311,7 @@ Object<span class="token punctuation">.</span><span class="token function">assig
   document<span class="token punctuation">.</span>documentElement<span class="token punctuation">.</span>clientHeight <span class="token operator">+</span> window<span class="token punctuation">.</span>scrollY <span class="token operator">>=</span>
   <span class="token punctuation">(</span>document<span class="token punctuation">.</span>documentElement<span class="token punctuation">.</span>scrollHeight <span class="token operator">||</span> document<span class="token punctuation">.</span>documentElement<span class="token punctuation">.</span>clientHeight<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">bottomVisible</span><span class="token punctuation">();</span> <span class="token comment">// true</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="copytoclipboard" class="section double-padded">copyToClipboard</h3><div class="section double-padded"><p>Copy a string to the clipboard. Only works as a result of user action (i.e. inside a <code>click</code> event listener).</p><p>Create a new <code>&lt;textarea&gt;</code> element, fill it with the supplied data and add it to the HTML document. Use <code>Selection.getRangeAt()</code>to store the selected range (if any). Use <code>document.execCommand('copy')</code> to copy to the clipboard. Remove the <code>&lt;textarea&gt;</code> element from the HTML document. Finally, use <code>Selection().addRange()</code> to recover the original selected range (if any).</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">copyToClipboard</span> <span class="token operator">=</span> str <span class="token operator">=></span> <span class="token punctuation">{</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="copytoclipboard" class="section double-padded">copyToClipboard<mark class="tag">advanced</mark></h3><div class="section double-padded"><p>Copy a string to the clipboard. Only works as a result of user action (i.e. inside a <code>click</code> event listener).</p><p>Create a new <code>&lt;textarea&gt;</code> element, fill it with the supplied data and add it to the HTML document. Use <code>Selection.getRangeAt()</code>to store the selected range (if any). Use <code>document.execCommand('copy')</code> to copy to the clipboard. Remove the <code>&lt;textarea&gt;</code> element from the HTML document. Finally, use <code>Selection().addRange()</code> to recover the original selected range (if any).</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">copyToClipboard</span> <span class="token operator">=</span> str <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">const</span> el <span class="token operator">=</span> document<span class="token punctuation">.</span><span class="token function">createElement</span><span class="token punctuation">(</span><span class="token string">'textarea'</span><span class="token punctuation">);</span>
   el<span class="token punctuation">.</span>value <span class="token operator">=</span> str<span class="token punctuation">;</span>
   el<span class="token punctuation">.</span><span class="token function">setAttribute</span><span class="token punctuation">(</span><span class="token string">'readonly'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">);</span>
@@ -372,7 +362,7 @@ Object<span class="token punctuation">.</span><span class="token function">assig
   <span class="token keyword">if</span> <span class="token punctuation">(</span>location<span class="token punctuation">.</span>protocol <span class="token operator">!==</span> <span class="token string">'https:'</span><span class="token punctuation">)</span> location<span class="token punctuation">.</span><span class="token function">replace</span><span class="token punctuation">(</span><span class="token string">'https://'</span> <span class="token operator">+</span> location<span class="token punctuation">.</span>href<span class="token punctuation">.</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token string">'//'</span><span class="token punctuation">)[</span><span class="token number">1</span><span class="token punctuation">]);
 };</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">httpsRedirect</span><span class="token punctuation">();</span> <span class="token comment">// If you are on http://mydomain.com, you are redirected to https://mydomain.com</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="onuserinputchange" class="section double-padded">onUserInputChange</h3><div class="section double-padded"><p>Run the callback whenever the user input type changes (<code>mouse</code> or <code>touch</code>). Useful for enabling/disabling code depending on the input device. This process is dynamic and works with hybrid devices (e.g. touchscreen laptops).</p><p>Use two event listeners. Assume <code>mouse</code> input initially and bind a <code>touchstart</code> event listener to the document. On <code>touchstart</code>, add a <code>mousemove</code> event listener to listen for two consecutive <code>mousemove</code> events firing within 20ms, using <code>performance.now()</code>. Run the callback with the input type as an argument in either of these situations.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">onUserInputChange</span> <span class="token operator">=</span> callback <span class="token operator">=></span> <span class="token punctuation">{</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="onuserinputchange" class="section double-padded">onUserInputChange<mark class="tag">advanced</mark></h3><div class="section double-padded"><p>Run the callback whenever the user input type changes (<code>mouse</code> or <code>touch</code>). Useful for enabling/disabling code depending on the input device. This process is dynamic and works with hybrid devices (e.g. touchscreen laptops).</p><p>Use two event listeners. Assume <code>mouse</code> input initially and bind a <code>touchstart</code> event listener to the document. On <code>touchstart</code>, add a <code>mousemove</code> event listener to listen for two consecutive <code>mousemove</code> events firing within 20ms, using <code>performance.now()</code>. Run the callback with the input type as an argument in either of these situations.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">onUserInputChange</span> <span class="token operator">=</span> callback <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">let</span> type <span class="token operator">=</span> <span class="token string">'mouse'</span><span class="token punctuation">,</span>
     lastTime <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
   <span class="token keyword">const</span> <span class="token function-variable function">mousemoveHandler</span> <span class="token operator">=</span> <span class="token punctuation">()</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
@@ -392,7 +382,7 @@ Object<span class="token punctuation">.</span><span class="token function">assig
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="redirect" class="section double-padded">redirect</h3><div class="section double-padded"><p>Redirects to a specified URL.</p><p>Use <code>window.location.href</code> or <code>window.location.replace()</code> to redirect to <code>url</code>. Pass a second argument to simulate a link click (<code>true</code> - default) or an HTTP redirect (<code>false</code>).</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">redirect</span> <span class="token operator">=</span> <span class="token punctuation">(</span>url<span class="token punctuation">,</span> asLink <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">)</span> <span class="token operator">=></span>
   asLink <span class="token operator">?</span> <span class="token punctuation">(</span>window<span class="token punctuation">.</span>location<span class="token punctuation">.</span>href <span class="token operator">=</span> url<span class="token punctuation">) :</span> window<span class="token punctuation">.</span>location<span class="token punctuation">.</span><span class="token function">replace</span><span class="token punctuation">(</span>url<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">redirect</span><span class="token punctuation">(</span><span class="token string">'https://google.com'</span><span class="token punctuation">);</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="runasync" class="section double-padded">runAsync</h3><div class="section double-padded"><p>Runs a function in a separate thread by using a <a href="https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers">Web Worker</a>, allowing long running functions to not block the UI.</p><p>Create a new <code>Worker</code> using a <code>Blob</code> object URL, the contents of which should be the stringified version of the supplied function. Immediately post the return value of calling the function back. Return a promise, listening for <code>onmessage</code> and <code>onerror</code> events and resolving the data posted back from the worker, or throwing an error.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">runAsync</span> <span class="token operator">=</span> fn <span class="token operator">=></span> <span class="token punctuation">{</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="runasync" class="section double-padded">runAsync<mark class="tag">advanced</mark></h3><div class="section double-padded"><p>Runs a function in a separate thread by using a <a href="https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers">Web Worker</a>, allowing long running functions to not block the UI.</p><p>Create a new <code>Worker</code> using a <code>Blob</code> object URL, the contents of which should be the stringified version of the supplied function. Immediately post the return value of calling the function back. Return a promise, listening for <code>onmessage</code> and <code>onerror</code> events and resolving the data posted back from the worker, or throwing an error.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">runAsync</span> <span class="token operator">=</span> fn <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">const</span> blob <span class="token operator">=</span> <span class="token template-string"><span class="token string">`var fn = </span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>fn<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">()</span><span class="token interpolation-punctuation punctuation">}</span></span><span class="token string">; postMessage(fn());`</span></span><span class="token punctuation">;</span>
   <span class="token keyword">const</span> worker <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Worker</span><span class="token punctuation">(</span>
     URL<span class="token punctuation">.</span><span class="token function">createObjectURL</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Blob</span><span class="token punctuation">([</span>blob<span class="token punctuation">]), {</span>
@@ -436,16 +426,10 @@ Object<span class="token punctuation">.</span><span class="token function">assig
   }
 };</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">scrollToTop</span><span class="token punctuation">();</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="setstyle" class="section double-padded">setStyle</h3><div class="section double-padded"><p>Sets the value of a CSS rule for the specified element.</p><p>Use <code>element.style</code> to set the value of the CSS rule for the specified element to <code>value</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">setStyle</span> <span class="token operator">=</span> <span class="token punctuation">(</span>el<span class="token punctuation">,</span> ruleName<span class="token punctuation">,</span> value<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span>el<span class="token punctuation">.</span>style<span class="token punctuation">[</span>ruleName<span class="token punctuation">]</span> <span class="token operator">=</span> value<span class="token punctuation">);</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="setstyle" class="section double-padded">setStyle</h3><div class="section double-padded"><p>Sets the value of a CSS rule for the specified element.</p><p>Use <code>element.style</code> to set the value of the CSS rule for the specified element to <code>val</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">setStyle</span> <span class="token operator">=</span> <span class="token punctuation">(</span>el<span class="token punctuation">,</span> ruleName<span class="token punctuation">,</span> val<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span>el<span class="token punctuation">.</span>style<span class="token punctuation">[</span>ruleName<span class="token punctuation">]</span> <span class="token operator">=</span> val<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">setStyle</span><span class="token punctuation">(</span>document<span class="token punctuation">.</span><span class="token function">querySelector</span><span class="token punctuation">(</span><span class="token string">'p'</span><span class="token punctuation">),</span> <span class="token string">'font-size'</span><span class="token punctuation">,</span> <span class="token string">'20px'</span><span class="token punctuation">);</span> <span class="token comment">// The first &lt;p> element on the page will have a font-size of 20px</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="show" class="section double-padded">show</h3><div class="section double-padded"><p>Shows all the elements specified.</p><p>Use the spread operator (<code>...</code>) and <code>Array.forEach()</code> to clear the <code>display</code> property for each element specified.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">show</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>el<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">[</span><span class="token operator">...</span>el<span class="token punctuation">].</span><span class="token function">forEach</span><span class="token punctuation">(</span>e <span class="token operator">=></span> <span class="token punctuation">(</span>e<span class="token punctuation">.</span>style<span class="token punctuation">.</span>display <span class="token operator">=</span> <span class="token string">''</span><span class="token punctuation">));</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">show</span><span class="token punctuation">(</span>document<span class="token punctuation">.</span><span class="token function">querySelectorAll</span><span class="token punctuation">(</span><span class="token string">'img'</span><span class="token punctuation">));</span> <span class="token comment">// Shows all &lt;img> elements on the page</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="speechsynthesis" class="section double-padded">speechSynthesis</h3><div class="section double-padded"><p>Performs speech synthesis (experimental).</p><p>Use <code>SpeechSynthesisUtterance.voice</code> and <code>window.speechSynthesis.getVoices()</code> to convert a message to speech. Use <code>window.speechSynthesis.speak()</code> to play the message.</p><p>Learn more about the <a href="https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesisUtterance">SpeechSynthesisUtterance interface of the Web Speech API</a>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">speechSynthesis</span> <span class="token operator">=</span> message <span class="token operator">=></span> <span class="token punctuation">{</span>
-  <span class="token keyword">const</span> msg <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">SpeechSynthesisUtterance</span><span class="token punctuation">(</span>message<span class="token punctuation">);</span>
-  msg<span class="token punctuation">.</span>voice <span class="token operator">=</span> window<span class="token punctuation">.</span>speechSynthesis<span class="token punctuation">.</span><span class="token function">getVoices</span><span class="token punctuation">()[</span><span class="token number">0</span><span class="token punctuation">];</span>
-  window<span class="token punctuation">.</span>speechSynthesis<span class="token punctuation">.</span><span class="token function">speak</span><span class="token punctuation">(</span>msg<span class="token punctuation">);
-};</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">speechSynthesis</span><span class="token punctuation">(</span><span class="token string">'Hello, World'</span><span class="token punctuation">);</span> <span class="token comment">// // plays the message</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="toggleclass" class="section double-padded">toggleClass</h3><div class="section double-padded"><p>Toggle a class for an element.</p><p>Use <code>element.classList.toggle()</code> to toggle the specified class for the element.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">toggleClass</span> <span class="token operator">=</span> <span class="token punctuation">(</span>el<span class="token punctuation">,</span> className<span class="token punctuation">)</span> <span class="token operator">=></span> el<span class="token punctuation">.</span>classList<span class="token punctuation">.</span><span class="token function">toggle</span><span class="token punctuation">(</span>className<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">toggleClass</span><span class="token punctuation">(</span>document<span class="token punctuation">.</span><span class="token function">querySelector</span><span class="token punctuation">(</span><span class="token string">'p.special'</span><span class="token punctuation">),</span> <span class="token string">'special'</span><span class="token punctuation">);</span> <span class="token comment">// The paragraph will not have the 'special' class anymore</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="uuidgeneratorbrowser" class="section double-padded">UUIDGeneratorBrowser</h3><div class="section double-padded"><p>Generates a UUID in a browser.</p><p>Use <code>crypto</code> API to generate a UUID, compliant with <a href="https://www.ietf.org/rfc/rfc4122.txt">RFC4122</a> version 4.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">UUIDGeneratorBrowser</span> <span class="token operator">=</span> <span class="token punctuation">()</span> <span class="token operator">=></span>
@@ -472,11 +456,6 @@ Object<span class="token punctuation">.</span><span class="token function">assig
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="getdaysdiffbetweendates" class="section double-padded">getDaysDiffBetweenDates</h3><div class="section double-padded"><p>Returns the difference (in days) between two dates.</p><p>Calculate the difference (in days) between two <code>Date</code> objects.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">getDaysDiffBetweenDates</span> <span class="token operator">=</span> <span class="token punctuation">(</span>dateInitial<span class="token punctuation">,</span> dateFinal<span class="token punctuation">)</span> <span class="token operator">=></span>
   <span class="token punctuation">(</span>dateFinal <span class="token operator">-</span> dateInitial<span class="token punctuation">)</span> <span class="token operator">/</span> <span class="token punctuation">(</span><span class="token number">1000</span> <span class="token operator">*</span> <span class="token number">3600</span> <span class="token operator">*</span> <span class="token number">24</span><span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">getDaysDiffBetweenDates</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span><span class="token string">'2017-12-13'</span><span class="token punctuation">),</span> <span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span><span class="token string">'2017-12-22'</span><span class="token punctuation">));</span> <span class="token comment">// 9</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="jsontodate" class="section double-padded">JSONToDate</h3><div class="section double-padded"><p>Converts a JSON object to a date.</p><p>Use <code>Date()</code>, to convert dates in JSON format to readable format (<code>dd/mm/yyyy</code>).</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">JSONToDate</span> <span class="token operator">=</span> arr <span class="token operator">=></span> <span class="token punctuation">{</span>
-  <span class="token keyword">const</span> dt <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span><span class="token function">parseInt</span><span class="token punctuation">(</span>arr<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">().</span><span class="token function">substr</span><span class="token punctuation">(</span><span class="token number">6</span><span class="token punctuation">)));</span>
-  <span class="token keyword">return</span> <span class="token template-string"><span class="token string">`</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>dt<span class="token punctuation">.</span><span class="token function">getDate</span><span class="token punctuation">()</span><span class="token interpolation-punctuation punctuation">}</span></span><span class="token string">/</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>dt<span class="token punctuation">.</span><span class="token function">getMonth</span><span class="token punctuation">()</span> <span class="token operator">+</span> <span class="token number">1</span><span class="token interpolation-punctuation punctuation">}</span></span><span class="token string">/</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>dt<span class="token punctuation">.</span><span class="token function">getFullYear</span><span class="token punctuation">()</span><span class="token interpolation-punctuation punctuation">}</span></span><span class="token string">`</span></span><span class="token punctuation">;
-};</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">JSONToDate</span><span class="token punctuation">(</span><span class="token regex">/Date(1489525200000)/</span><span class="token punctuation">);</span> <span class="token comment">// "14/3/2017"</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="toenglishdate" class="section double-padded">toEnglishDate</h3><div class="section double-padded"><p>Converts a date from American format to English format.</p><p>Use <code>Date.toISOString()</code>, <code>split('T')</code> and <code>replace()</code> to convert a date from American format to the English format. Throws an error if the passed time cannot be converted to a date.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">toEnglishDate</span> <span class="token operator">=</span> time <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">try</span> <span class="token punctuation">{</span>
     <span class="token keyword">return new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span>time<span class="token punctuation">)
@@ -486,7 +465,7 @@ Object<span class="token punctuation">.</span><span class="token function">assig
   }</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">e</span><span class="token punctuation">) {}
 };</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">toEnglishDate</span><span class="token punctuation">(</span><span class="token string">'09/21/2010'</span><span class="token punctuation">);</span> <span class="token comment">// '21/09/2010'</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="tomorrow" class="section double-padded">tomorrow</h3><div class="section double-padded"><p>Results in a string representation of tomorrow's date. Use <code>new Date()</code> to get today's date, adding <code>86400000</code> of seconds to it(24 hours), using <code>toISOString</code> to convert Date object to string.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">tomorrow</span> <span class="token operator">=</span> <span class="token punctuation">()</span> <span class="token operator">=></span> <span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">().</span><span class="token function">getTime</span><span class="token punctuation">()</span> <span class="token operator">+</span> <span class="token number">86400000</span><span class="token punctuation">).</span><span class="token function">toISOString</span><span class="token punctuation">().</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token string">'T'</span><span class="token punctuation">)[</span><span class="token number">0</span><span class="token punctuation">];</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="tomorrow" class="section double-padded">tomorrow</h3><div class="section double-padded"><p>Results in a string representation of tomorrow's date. Use <code>new Date()</code> to get today's date, adding <code>86400000</code> of seconds to it(24 hours), using <code>Date.toISOString()</code> to convert Date object to string.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">tomorrow</span> <span class="token operator">=</span> <span class="token punctuation">()</span> <span class="token operator">=></span> <span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">().</span><span class="token function">getTime</span><span class="token punctuation">()</span> <span class="token operator">+</span> <span class="token number">86400000</span><span class="token punctuation">).</span><span class="token function">toISOString</span><span class="token punctuation">().</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token string">'T'</span><span class="token punctuation">)[</span><span class="token number">0</span><span class="token punctuation">];</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">tomorrow</span><span class="token punctuation">();</span> <span class="token comment">// 2017-12-27 (if current date is 2017-12-26)</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><h2 style="text-align:center">Function</h2><div class="card fluid"><h3 id="chainasync" class="section double-padded">chainAsync</h3><div class="section double-padded"><p>Chains asynchronous functions.</p><p>Loop through an array of functions containing asynchronous events, calling <code>next</code> when each asynchronous event has completed.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">chainAsync</span> <span class="token operator">=</span> fns <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">let</span> curr <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
@@ -555,25 +534,20 @@ document<span class="token punctuation">.</span>body<span class="token punctuati
   <span class="token keyword">await</span> <span class="token function">sleep</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">);</span>
   console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'I woke up after 1 second.'</span><span class="token punctuation">);
 }</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><h2 style="text-align:center">Logic</h2><div class="card fluid"><h3 id="negate" class="section double-padded">negate</h3><div class="section double-padded"><p>Negates a predicate function.</p><p>Take a predicate function and apply <code>not</code> to it with its arguments.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">negate</span> <span class="token operator">=</span> func <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=> !</span><span class="token function">func</span><span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">);</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><h2 style="text-align:center">Logic</h2><div class="card fluid"><h3 id="negate" class="section double-padded">negate</h3><div class="section double-padded"><p>Negates a predicate function.</p><p>Take a predicate function and apply the not operator (<code>!</code>) to it with its arguments.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">negate</span> <span class="token operator">=</span> func <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=> !</span><span class="token function">func</span><span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">filter</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">6</span><span class="token punctuation">],</span> <span class="token function">negate</span><span class="token punctuation">(</span>isEven<span class="token punctuation">));</span> <span class="token comment">// [1, 3, 5]</span>
 <span class="token function">negate</span><span class="token punctuation">(</span>isOdd<span class="token punctuation">)(</span><span class="token number">1</span><span class="token punctuation">);</span> <span class="token comment">// false</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><h2 style="text-align:center">Math</h2><div class="card fluid"><h3 id="average" class="section double-padded">average</h3><div class="section double-padded"><p>Returns the average of an of two or more numbers/arrays.</p><p>Use <code>Array.reduce()</code> to add each value to an accumulator, initialized with a value of <code>0</code>, divide by the <code>length</code> of the array.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">average</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
-  <span class="token keyword">const</span> nums <span class="token operator">=</span> <span class="token punctuation">[].</span><span class="token function">concat</span><span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">);</span>
-  <span class="token keyword">return</span> nums<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>acc<span class="token punctuation">,</span> val<span class="token punctuation">)</span> <span class="token operator">=></span> acc <span class="token operator">+</span> val<span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token operator">/</span> nums<span class="token punctuation">.</span>length<span class="token punctuation">;
-};</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">average</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">]);</span> <span class="token comment">// 2</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><h2 style="text-align:center">Math</h2><div class="card fluid"><h3 id="average" class="section double-padded">average</h3><div class="section double-padded"><p>Returns the average of an of two or more numbers.</p><p>Use <code>Array.reduce()</code> to add each value to an accumulator, initialized with a value of <code>0</code>, divide by the <code>length</code> of the array.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">average</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>nums<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">[</span><span class="token operator">...</span>nums<span class="token punctuation">].</span><span class="token function">reduce</span><span class="token punctuation">((</span>acc<span class="token punctuation">,</span> val<span class="token punctuation">)</span> <span class="token operator">=></span> acc <span class="token operator">+</span> val<span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token operator">/</span> nums<span class="token punctuation">.</span>length<span class="token punctuation">;</span>
+</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">average</span><span class="token punctuation">(</span><span class="token operator">...</span><span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">]);</span> <span class="token comment">// 2</span>
 <span class="token function">average</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">);</span> <span class="token comment">// 2</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="clampnumber" class="section double-padded">clampNumber</h3><div class="section double-padded"><p>Clamps <code>num</code> within the inclusive range specified by the boundary values <code>a</code> and <code>b</code>.</p><p>If <code>num</code> falls within the range, return <code>num</code>. Otherwise, return the nearest number in the range.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">clampNumber</span> <span class="token operator">=</span> <span class="token punctuation">(</span>num<span class="token punctuation">,</span> a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> Math<span class="token punctuation">.</span><span class="token function">max</span><span class="token punctuation">(</span>Math<span class="token punctuation">.</span><span class="token function">min</span><span class="token punctuation">(</span>num<span class="token punctuation">,</span> Math<span class="token punctuation">.</span><span class="token function">max</span><span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)),</span> Math<span class="token punctuation">.</span><span class="token function">min</span><span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">));</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">clampNumber</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">);</span> <span class="token comment">// 3</span>
 <span class="token function">clampNumber</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">5</span><span class="token punctuation">);</span> <span class="token comment">// -1</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="collatz" class="section double-padded">collatz</h3><div class="section double-padded"><p>Applies the Collatz algorithm.</p><p>If <code>n</code> is even, return <code>n/2</code>. Otherwise, return <code>3n+1</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">collatz</span> <span class="token operator">=</span> n <span class="token operator">=></span> <span class="token punctuation">(</span>n <span class="token operator">%</span> <span class="token number">2</span> <span class="token operator">==</span> <span class="token number">0</span> <span class="token operator">?</span> n <span class="token operator">/</span> <span class="token number">2</span> <span class="token punctuation">:</span> <span class="token number">3</span> <span class="token operator">*</span> n <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">);</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">collatz</span><span class="token punctuation">(</span><span class="token number">8</span><span class="token punctuation">);</span> <span class="token comment">// 4</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="digitize" class="section double-padded">digitize</h3><div class="section double-padded"><p>Converts a number to an array of digits.</p><p>Convert the number to a string, using spread operators in ES6(<code>[...string]</code>) build an array. Use <code>Array.map()</code> and <code>parseInt()</code> to transform each value to an integer.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">digitize</span> <span class="token operator">=</span> n <span class="token operator">=></span> <span class="token punctuation">[</span><span class="token operator">...</span><span class="token punctuation">(</span><span class="token string">''</span> <span class="token operator">+</span> n<span class="token punctuation">)].</span><span class="token function">map</span><span class="token punctuation">(</span>i <span class="token operator">=></span> <span class="token function">parseInt</span><span class="token punctuation">(</span>i<span class="token punctuation">));</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">digitize</span><span class="token punctuation">(</span><span class="token number">123</span><span class="token punctuation">);</span> <span class="token comment">// [1, 2, 3]</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="distance" class="section double-padded">distance</h3><div class="section double-padded"><p>Returns the distance between two points.</p><p>Use <code>Math.hypot()</code> to calculate the Euclidean distance between two points.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">distance</span> <span class="token operator">=</span> <span class="token punctuation">(</span>x0<span class="token punctuation">,</span> y0<span class="token punctuation">,</span> x1<span class="token punctuation">,</span> y1<span class="token punctuation">)</span> <span class="token operator">=></span> Math<span class="token punctuation">.</span><span class="token function">hypot</span><span class="token punctuation">(</span>x1 <span class="token operator">-</span> x0<span class="token punctuation">,</span> y1 <span class="token operator">-</span> y0<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">distance</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">);</span> <span class="token comment">// 2.23606797749979</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="elo" class="section double-padded">elo</h3><div class="section double-padded"><p>Computes the new ratings between two or more opponents using the <a href="https://en.wikipedia.org/wiki/Elo_rating_system">Elo rating system</a>. It takes an array of pre-ratings and returns an array containing post-ratings. The array should be ordered from best performer to worst performer (winner -&gt; loser).</p><p>Use the exponent <code>**</code> operator and math operators to compute the expected score (chance of winning) of each opponent and compute the new rating for each. Loop through the ratings, using each permutation to compute the post-Elo rating for each player in a pairwise fashion. Omit the second argument to use the default K-factor of 32, or supply a custom K-factor value. For details on the third argument, see the last example.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">elo</span> <span class="token operator">=</span> <span class="token punctuation">([</span><span class="token operator">...</span>ratings<span class="token punctuation">],</span> kFactor <span class="token operator">=</span> <span class="token number">32</span><span class="token punctuation">,</span> selfRating<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="elo" class="section double-padded">elo<mark class="tag">advanced</mark></h3><div class="section double-padded"><p>Computes the new ratings between two or more opponents using the <a href="https://en.wikipedia.org/wiki/Elo_rating_system">Elo rating system</a>. It takes an array of pre-ratings and returns an array containing post-ratings. The array should be ordered from best performer to worst performer (winner -&gt; loser).</p><p>Use the exponent <code>**</code> operator and math operators to compute the expected score (chance of winning). of each opponent and compute the new rating for each. Loop through the ratings, using each permutation to compute the post-Elo rating for each player in a pairwise fashion. Omit the second argument to use the default <code>kFactor</code> of 32.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">elo</span> <span class="token operator">=</span> <span class="token punctuation">([</span><span class="token operator">...</span>ratings<span class="token punctuation">],</span> kFactor <span class="token operator">=</span> <span class="token number">32</span><span class="token punctuation">,</span> selfRating<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">const</span> <span class="token punctuation">[</span>a<span class="token punctuation">,</span> b<span class="token punctuation">]</span> <span class="token operator">=</span> ratings<span class="token punctuation">;</span>
   <span class="token keyword">const</span> <span class="token function-variable function">expectedScore</span> <span class="token operator">=</span> <span class="token punctuation">(</span>self<span class="token punctuation">,</span> opponent<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token number">1</span> <span class="token operator">/</span> <span class="token punctuation">(</span><span class="token number">1</span> <span class="token operator">+</span> <span class="token number">10</span> <span class="token operator">**</span> <span class="token punctuation">((</span>opponent <span class="token operator">-</span> self<span class="token punctuation">)</span> <span class="token operator">/</span> <span class="token number">400</span><span class="token punctuation">));</span>
   <span class="token keyword">const</span> <span class="token function-variable function">newRating</span> <span class="token operator">=</span> <span class="token punctuation">(</span>rating<span class="token punctuation">,</span> i<span class="token punctuation">)</span> <span class="token operator">=></span>
@@ -597,7 +571,7 @@ document<span class="token punctuation">.</span>body<span class="token punctuati
 <span class="token comment">// 4 player FFA, all same rank</span>
 <span class="token function">elo</span><span class="token punctuation">([</span><span class="token number">1200</span><span class="token punctuation">,</span> <span class="token number">1200</span><span class="token punctuation">,</span> <span class="token number">1200</span><span class="token punctuation">,</span> <span class="token number">1200</span><span class="token punctuation">]).</span><span class="token function">map</span><span class="token punctuation">(</span>Math<span class="token punctuation">.</span>round<span class="token punctuation">);</span> <span class="token comment">// [1246, 1215, 1185, 1154]</span>
 <span class="token comment">/*
-For teams, each rating can adjusted based on own team's average rating vs. 
+For teams, each rating can adjusted based on own team's average rating vs.
 average rating of opposing team, with the score being added to their
 own individual rating by supplying it as the third argument.
 */</span>
@@ -608,51 +582,18 @@ own individual rating by supplying it as the third argument.
       })()
     :</span> n <span class="token operator">&lt;=</span> <span class="token number">1</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> n <span class="token operator">*</span> <span class="token function">factorial</span><span class="token punctuation">(</span>n <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">factorial</span><span class="token punctuation">(</span><span class="token number">6</span><span class="token punctuation">);</span> <span class="token comment">// 720</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="factors" class="section double-padded">factors</h3><div class="section double-padded"><p>Returns the array of factors of the given <code>num</code>. If the second argument is set to <code>true</code> returns only the prime factors of <code>num</code>. If <code>num</code> is <code>1</code> or <code>0</code> returns an empty array. If <code>num</code> is less than <code>0</code> returns all the factors of <code>-int</code> together with their additive inverses.</p><p>Use <code>Array.from()</code>, <code>Array.map()</code> and <code>Array.filter()</code> to find all the factors of <code>num</code>. If given <code>num</code> is negative, use <code>Array.reduce()</code> to add the additive inverses to the array. Return all results if <code>primes</code> is <code>false</code>, else determine and return only the prime factors using <code>isPrime</code> and <code>Array.filter()</code>. Omit the second argument, <code>primes</code>, to return prime and non-prime factors by default.</p><p><strong>Note</strong>:- <em>Negative numbers are not considered prime.</em></p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">factors</span> <span class="token operator">=</span> <span class="token punctuation">(</span>num<span class="token punctuation">,</span> primes <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
-  <span class="token keyword">const</span> <span class="token function-variable function">isPrime</span> <span class="token operator">=</span> num <span class="token operator">=></span> <span class="token punctuation">{</span>
-    <span class="token keyword">const</span> boundary <span class="token operator">=</span> Math<span class="token punctuation">.</span><span class="token function">floor</span><span class="token punctuation">(</span>Math<span class="token punctuation">.</span><span class="token function">sqrt</span><span class="token punctuation">(</span>num<span class="token punctuation">));</span>
-    <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">var</span> i <span class="token operator">=</span> <span class="token number">2</span><span class="token punctuation">;</span> i <span class="token operator">&lt;=</span> boundary<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token keyword">if</span> <span class="token punctuation">(</span>num <span class="token operator">%</span> i <span class="token operator">===</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token keyword">return</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
-    <span class="token keyword">return</span> num <span class="token operator">>=</span> <span class="token number">2</span><span class="token punctuation">;
-  };</span>
-  <span class="token keyword">const</span> isNeg <span class="token operator">=</span> num <span class="token operator">&lt;</span> <span class="token number">0</span><span class="token punctuation">;</span>
-  num <span class="token operator">=</span> isNeg <span class="token operator">? -</span>num <span class="token punctuation">:</span> num<span class="token punctuation">;</span>
-  <span class="token keyword">let</span> array <span class="token operator">=</span> Array<span class="token punctuation">.</span><span class="token keyword">from</span><span class="token punctuation">({</span> length<span class="token punctuation">:</span> num <span class="token operator">-</span> <span class="token number">1</span> <span class="token punctuation">})
-    .</span><span class="token function">map</span><span class="token punctuation">((</span>val<span class="token punctuation">,</span> i<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span>num <span class="token operator">%</span> <span class="token punctuation">(</span>i <span class="token operator">+</span> <span class="token number">2</span><span class="token punctuation">)</span> <span class="token operator">===</span> <span class="token number">0</span> <span class="token operator">?</span> i <span class="token operator">+</span> <span class="token number">2</span> <span class="token punctuation">:</span> <span class="token boolean">false</span><span class="token punctuation">))
-    .</span><span class="token function">filter</span><span class="token punctuation">(</span>val <span class="token operator">=></span> val<span class="token punctuation">);</span>
-  <span class="token keyword">if</span> <span class="token punctuation">(</span>isNeg<span class="token punctuation">)</span>
-    array <span class="token operator">=</span> array<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>acc<span class="token punctuation">,</span> val<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
-      acc<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span>val<span class="token punctuation">);</span>
-      acc<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span><span class="token operator">-</span>val<span class="token punctuation">);</span>
-      <span class="token keyword">return</span> acc<span class="token punctuation">;
-    }, []);</span>
-  <span class="token keyword">return</span> primes <span class="token operator">?</span> array<span class="token punctuation">.</span><span class="token function">filter</span><span class="token punctuation">(</span>isPrime<span class="token punctuation">) :</span> array<span class="token punctuation">;
-};</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">factors</span><span class="token punctuation">(</span><span class="token number">12</span><span class="token punctuation">);</span> <span class="token comment">// [2,3,4,6,12]</span>
-<span class="token function">factors</span><span class="token punctuation">(</span><span class="token number">12</span><span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">);</span> <span class="token comment">// [2,3]</span>
-<span class="token function">factors</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">12</span><span class="token punctuation">);</span> <span class="token comment">// [2, -2, 3, -3, 4, -4, 6, -6, 12, -12]</span>
-<span class="token function">factors</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">12</span><span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">);</span> <span class="token comment">// [2,3]</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="fibonacci" class="section double-padded">fibonacci</h3><div class="section double-padded"><p>Generates an array, containing the Fibonacci sequence, up until the nth term.</p><p>Create an empty array of the specific length, initializing the first two values (<code>0</code> and <code>1</code>). Use <code>Array.reduce()</code> to add values into the array, using the sum of the last two values, except for the first two.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">fibonacci</span> <span class="token operator">=</span> n <span class="token operator">=></span>
   Array<span class="token punctuation">.</span><span class="token keyword">from</span><span class="token punctuation">({</span> length<span class="token punctuation">:</span> n <span class="token punctuation">}).</span><span class="token function">reduce</span><span class="token punctuation">(
     (</span>acc<span class="token punctuation">,</span> val<span class="token punctuation">,</span> i<span class="token punctuation">)</span> <span class="token operator">=></span> acc<span class="token punctuation">.</span><span class="token function">concat</span><span class="token punctuation">(</span>i <span class="token operator">></span> <span class="token number">1</span> <span class="token operator">?</span> acc<span class="token punctuation">[</span>i <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">]</span> <span class="token operator">+</span> acc<span class="token punctuation">[</span>i <span class="token operator">-</span> <span class="token number">2</span><span class="token punctuation">] :</span> i<span class="token punctuation">),
     []
   );</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">fibonacci</span><span class="token punctuation">(</span><span class="token number">6</span><span class="token punctuation">);</span> <span class="token comment">// [0, 1, 1, 2, 3, 5]</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="fibonaccicountuntilnum" class="section double-padded">fibonacciCountUntilNum</h3><div class="section double-padded"><p>Returns the number of fibonnacci numbers up to <code>num</code>(<code>0</code> and <code>num</code> inclusive).</p><p>Use a mathematical formula to calculate the number of fibonacci numbers until <code>num</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">fibonacciCountUntilNum</span> <span class="token operator">=</span> num <span class="token operator">=></span>
-  Math<span class="token punctuation">.</span><span class="token function">ceil</span><span class="token punctuation">(</span>Math<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>num <span class="token operator">*</span> Math<span class="token punctuation">.</span><span class="token function">sqrt</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token number">1</span> <span class="token operator">/</span> <span class="token number">2</span><span class="token punctuation">)</span> <span class="token operator">/</span> Math<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">((</span>Math<span class="token punctuation">.</span><span class="token function">sqrt</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">/</span> <span class="token number">2</span><span class="token punctuation">));</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">fibonacciCountUntilNum</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">);</span> <span class="token comment">// 7</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="fibonacciuntilnum" class="section double-padded">fibonacciUntilNum</h3><div class="section double-padded"><p>Generates an array, containing the Fibonacci sequence, up until the nth term.</p><p>Create an empty array of the specific length, initializing the first two values (<code>0</code> and <code>1</code>). Use <code>Array.reduce()</code> to add values into the array, using the sum of the last two values, except for the first two. Uses a mathematical formula to calculate the length of the array required.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">fibonacciUntilNum</span> <span class="token operator">=</span> num <span class="token operator">=></span> <span class="token punctuation">{</span>
-  <span class="token keyword">let</span> n <span class="token operator">=</span> Math<span class="token punctuation">.</span><span class="token function">ceil</span><span class="token punctuation">(</span>Math<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>num <span class="token operator">*</span> Math<span class="token punctuation">.</span><span class="token function">sqrt</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token number">1</span> <span class="token operator">/</span> <span class="token number">2</span><span class="token punctuation">)</span> <span class="token operator">/</span> Math<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">((</span>Math<span class="token punctuation">.</span><span class="token function">sqrt</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">/</span> <span class="token number">2</span><span class="token punctuation">));</span>
-  <span class="token keyword">return</span> Array<span class="token punctuation">.</span><span class="token keyword">from</span><span class="token punctuation">({</span> length<span class="token punctuation">:</span> n <span class="token punctuation">}).</span><span class="token function">reduce</span><span class="token punctuation">(
-    (</span>acc<span class="token punctuation">,</span> val<span class="token punctuation">,</span> i<span class="token punctuation">)</span> <span class="token operator">=></span> acc<span class="token punctuation">.</span><span class="token function">concat</span><span class="token punctuation">(</span>i <span class="token operator">></span> <span class="token number">1</span> <span class="token operator">?</span> acc<span class="token punctuation">[</span>i <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">]</span> <span class="token operator">+</span> acc<span class="token punctuation">[</span>i <span class="token operator">-</span> <span class="token number">2</span><span class="token punctuation">] :</span> i<span class="token punctuation">),
-    []
-  );
-};</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">fibonacciUntilNum</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">);</span> <span class="token comment">// [ 0, 1, 1, 2, 3, 5, 8 ]</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="gcd" class="section double-padded">gcd</h3><div class="section double-padded"><p>Calculates the greatest common divisor between two or more numbers/arrays.</p><p>The inner <code>_gcd</code> function uses recursion. Base case is when <code>y</code> equals <code>0</code>. In this case, return <code>x</code>. Otherwise, return the GCD of <code>y</code> and the remainder of the division <code>x/y</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">gcd</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">const</span> <span class="token function-variable function">_gcd</span> <span class="token operator">=</span> <span class="token punctuation">(</span>x<span class="token punctuation">,</span> y<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">!</span>y <span class="token operator">?</span> x <span class="token punctuation">:</span> <span class="token function">gcd</span><span class="token punctuation">(</span>y<span class="token punctuation">,</span> x <span class="token operator">%</span> y<span class="token punctuation">));</span>
-  <span class="token keyword">return</span> <span class="token punctuation">[].</span><span class="token function">concat</span><span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">).</span><span class="token function">reduce</span><span class="token punctuation">((</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">_gcd</span><span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">));
+  <span class="token keyword">return</span> <span class="token punctuation">[</span><span class="token operator">...</span>arr<span class="token punctuation">].</span><span class="token function">reduce</span><span class="token punctuation">((</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">_gcd</span><span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">));
 };</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">gcd</span><span class="token punctuation">(</span><span class="token number">8</span><span class="token punctuation">,</span> <span class="token number">36</span><span class="token punctuation">);</span> <span class="token comment">// 4</span>
+<span class="token function">gcd</span><span class="token punctuation">(</span><span class="token operator">...</span><span class="token punctuation">[</span><span class="token number">12</span><span class="token punctuation">,</span> <span class="token number">8</span><span class="token punctuation">,</span> <span class="token number">32</span><span class="token punctuation">]);</span> <span class="token comment">// 4</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="geometricprogression" class="section double-padded">geometricProgression</h3><div class="section double-padded"><p>Initializes an array containing the numbers in the specified range where <code>start</code> and <code>end</code> are inclusive and the ratio between two terms is <code>step</code>. Returns an error if <code>step</code> equals <code>1</code>.</p><p>Use <code>Array.from()</code>, <code>Math.log()</code> and <code>Math.floor()</code> to create an array of the desired length, <code>Array.map()</code> to fill with the desired values in a range. Omit the second argument, <code>start</code>, to use a default value of <code>1</code>. Omit the third argument, <code>step</code>, to use a default value of <code>2</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">geometricProgression</span> <span class="token operator">=</span> <span class="token punctuation">(</span>end<span class="token punctuation">,</span> start <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">,</span> step <span class="token operator">=</span> <span class="token number">2</span><span class="token punctuation">)</span> <span class="token operator">=></span>
   Array<span class="token punctuation">.</span><span class="token keyword">from</span><span class="token punctuation">({</span> length<span class="token punctuation">:</span> Math<span class="token punctuation">.</span><span class="token function">floor</span><span class="token punctuation">(</span>Math<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>end <span class="token operator">/</span> start<span class="token punctuation">)</span> <span class="token operator">/</span> Math<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>step<span class="token punctuation">))</span> <span class="token operator">+</span> <span class="token number">1</span> <span class="token punctuation">}).</span><span class="token function">map</span><span class="token punctuation">(
     (</span>v<span class="token punctuation">,</span> i<span class="token punctuation">)</span> <span class="token operator">=></span> start <span class="token operator">*</span> step <span class="token operator">**</span> i
@@ -662,20 +603,6 @@ own individual rating by supplying it as the third argument.
 <span class="token function">geometricProgression</span><span class="token punctuation">(</span><span class="token number">256</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">);</span> <span class="token comment">// [1, 4, 16, 64, 256]</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="hammingdistance" class="section double-padded">hammingDistance</h3><div class="section double-padded"><p>Calculates the Hamming distance between two values.</p><p>Use XOR operator (<code>^</code>) to find the bit difference between the two numbers, convert to a binary string using <code>toString(2)</code>. Count and return the number of <code>1</code>s in the string, using <code>match(/1/g)</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">hammingDistance</span> <span class="token operator">=</span> <span class="token punctuation">(</span>num1<span class="token punctuation">,</span> num2<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">((</span>num1 <span class="token operator">^</span> num2<span class="token punctuation">).</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">).</span><span class="token function">match</span><span class="token punctuation">(</span><span class="token regex">/1/g</span><span class="token punctuation">)</span> <span class="token operator">||</span> <span class="token string">''</span><span class="token punctuation">).</span>length<span class="token punctuation">;</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">hammingDistance</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">);</span> <span class="token comment">// 1</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="howmanytimes" class="section double-padded">howManyTimes</h3><div class="section double-padded"><p>Returns the number of times <code>num</code> can be divided by <code>divisor</code> (integer or fractional) without getting a fractional answer. Works for both negative and positive integers.</p><p>If <code>divisor</code> is <code>-1</code> or <code>1</code> return <code>Infinity</code>. If <code>divisor</code> is <code>-0</code> or <code>0</code> return <code>0</code>. Otherwise, keep dividing <code>num</code> with <code>divisor</code> and incrementing <code>i</code>, while the result is an integer. Return the number of times the loop was executed, <code>i</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">howManyTimes</span> <span class="token operator">=</span> <span class="token punctuation">(</span>num<span class="token punctuation">,</span> divisor<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
-  <span class="token keyword">if</span> <span class="token punctuation">(</span>divisor <span class="token operator">===</span> <span class="token number">1</span> <span class="token operator">||</span> divisor <span class="token operator">=== -</span><span class="token number">1</span><span class="token punctuation">)</span> <span class="token keyword">return</span> <span class="token number">Infinity</span><span class="token punctuation">;</span>
-  <span class="token keyword">if</span> <span class="token punctuation">(</span>divisor <span class="token operator">===</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span>
-  <span class="token keyword">let</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
-  <span class="token keyword">while</span> <span class="token punctuation">(</span>Number<span class="token punctuation">.</span><span class="token function">isInteger</span><span class="token punctuation">(</span>num <span class="token operator">/</span> divisor<span class="token punctuation">)) {</span>
-    i<span class="token operator">++</span><span class="token punctuation">;</span>
-    num <span class="token operator">=</span> num <span class="token operator">/</span> divisor<span class="token punctuation">;
-  }</span>
-  <span class="token keyword">return</span> i<span class="token punctuation">;
-};</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">howManyTimes</span><span class="token punctuation">(</span><span class="token number">100</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">);</span> <span class="token comment">// 2</span>
-<span class="token function">howManyTimes</span><span class="token punctuation">(</span><span class="token number">100</span><span class="token punctuation">,</span> <span class="token number">2.5</span><span class="token punctuation">);</span> <span class="token comment">// 2</span>
-<span class="token function">howManyTimes</span><span class="token punctuation">(</span><span class="token number">100</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">);</span> <span class="token comment">// 0</span>
-<span class="token function">howManyTimes</span><span class="token punctuation">(</span><span class="token number">100</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">);</span> <span class="token comment">// Infinity</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="inrange" class="section double-padded">inRange</h3><div class="section double-padded"><p>Checks if the given number falls within the given range.</p><p>Use arithmetic comparison to check if the given number is in the specified range. If the second parameter, <code>end</code>, is not specified, the range is considered to be from <code>0</code> to <code>start</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">inRange</span> <span class="token operator">=</span> <span class="token punctuation">(</span>n<span class="token punctuation">,</span> start<span class="token punctuation">,</span> end <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">if</span> <span class="token punctuation">(</span>end <span class="token operator">&amp;&amp;</span> start <span class="token operator">></span> end<span class="token punctuation">)</span> end <span class="token operator">=</span> <span class="token punctuation">[</span>start<span class="token punctuation">, (</span>start <span class="token operator">=</span> end<span class="token punctuation">)][</span><span class="token number">0</span><span class="token punctuation">];</span>
   <span class="token keyword">return</span> end <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">?</span> n <span class="token operator">>=</span> <span class="token number">0</span> <span class="token operator">&amp;&amp;</span> n <span class="token operator">&lt;</span> start <span class="token punctuation">:</span> n <span class="token operator">>=</span> start <span class="token operator">&amp;&amp;</span> n <span class="token operator">&lt;</span> end<span class="token punctuation">;
@@ -684,12 +611,6 @@ own individual rating by supplying it as the third argument.
 <span class="token function">inRange</span><span class="token punctuation">(</span><span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
 <span class="token function">inRange</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">);</span> <span class="token comment">// false</span>
 <span class="token function">inrange</span><span class="token punctuation">(</span><span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">);</span> <span class="token comment">// false</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="isarmstrongnumber" class="section double-padded">isArmstrongNumber</h3><div class="section double-padded"><p>Checks if the given number is an Armstrong number or not.</p><p>Convert the given number into an array of digits. Use the exponent operator (<code>**</code>) to get the appropriate power for each digit and sum them up. If the sum is equal to the number itself, return <code>true</code> otherwise <code>false</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">isArmstrongNumber</span> <span class="token operator">=</span> digits <span class="token operator">=></span>
-  <span class="token punctuation">(</span>arr <span class="token operator">=></span> arr<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>a<span class="token punctuation">,</span> d<span class="token punctuation">)</span> <span class="token operator">=></span> a <span class="token operator">+</span> <span class="token function">parseInt</span><span class="token punctuation">(</span>d<span class="token punctuation">)</span> <span class="token operator">**</span> arr<span class="token punctuation">.</span>length<span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token operator">==</span> digits<span class="token punctuation">)(
-    (</span>digits <span class="token operator">+</span> <span class="token string">''</span><span class="token punctuation">).</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">)
-  );</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">isArmstrongNumber</span><span class="token punctuation">(</span><span class="token number">1634</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
-<span class="token function">isArmstrongNumber</span><span class="token punctuation">(</span><span class="token number">56</span><span class="token punctuation">);</span> <span class="token comment">// false</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="isdivisible" class="section double-padded">isDivisible</h3><div class="section double-padded"><p>Checks if the first numeric argument is divisible by the second one.</p><p>Use the modulo operator (<code>%</code>) to check if the remainder is equal to <code>0</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">isDivisible</span> <span class="token operator">=</span> <span class="token punctuation">(</span>dividend<span class="token punctuation">,</span> divisor<span class="token punctuation">)</span> <span class="token operator">=></span> dividend <span class="token operator">%</span> divisor <span class="token operator">===</span> <span class="token number">0</span><span class="token punctuation">;</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">isDivisible</span><span class="token punctuation">(</span><span class="token number">6</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="iseven" class="section double-padded">isEven</h3><div class="section double-padded"><p>Returns <code>true</code> if the given number is even, <code>false</code> otherwise.</p><p>Checks whether a number is odd or even using the modulo (<code>%</code>) operator. Returns <code>true</code> if the number is even, <code>false</code> if the number is odd.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">isEven</span> <span class="token operator">=</span> num <span class="token operator">=></span> num <span class="token operator">%</span> <span class="token number">2</span> <span class="token operator">===</span> <span class="token number">0</span><span class="token punctuation">;</span>
@@ -700,13 +621,13 @@ own individual rating by supplying it as the third argument.
   <span class="token keyword">return</span> num <span class="token operator">>=</span> <span class="token number">2</span><span class="token punctuation">;
 };</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">isPrime</span><span class="token punctuation">(</span><span class="token number">11</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="lcm" class="section double-padded">lcm</h3><div class="section double-padded"><p>Returns the least common multiple of two or more numbers/arrays.</p><p>Use the greatest common divisor (GCD) formula and <code>Math.abs()</code> to determine the least common multiple. The GCD formula uses recursion.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">lcm</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="lcm" class="section double-padded">lcm</h3><div class="section double-padded"><p>Returns the least common multiple of two or more numbers.</p><p>Use the greatest common divisor (GCD) formula and <code>Math.abs()</code> to determine the least common multiple. The GCD formula uses recursion.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">lcm</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">const</span> <span class="token function-variable function">gcd</span> <span class="token operator">=</span> <span class="token punctuation">(</span>x<span class="token punctuation">,</span> y<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">!</span>y <span class="token operator">?</span> x <span class="token punctuation">:</span> <span class="token function">gcd</span><span class="token punctuation">(</span>y<span class="token punctuation">,</span> x <span class="token operator">%</span> y<span class="token punctuation">));</span>
   <span class="token keyword">const</span> <span class="token function-variable function">_lcm</span> <span class="token operator">=</span> <span class="token punctuation">(</span>x<span class="token punctuation">,</span> y<span class="token punctuation">)</span> <span class="token operator">=></span> x <span class="token operator">*</span> y <span class="token operator">/</span> <span class="token function">gcd</span><span class="token punctuation">(</span>x<span class="token punctuation">,</span> y<span class="token punctuation">);</span>
-  <span class="token keyword">return</span> <span class="token punctuation">[].</span><span class="token function">concat</span><span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">).</span><span class="token function">reduce</span><span class="token punctuation">((</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">_lcm</span><span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">));
+  <span class="token keyword">return</span> <span class="token punctuation">[</span><span class="token operator">...</span>arr<span class="token punctuation">].</span><span class="token function">reduce</span><span class="token punctuation">((</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">_lcm</span><span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">));
 };</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">lcm</span><span class="token punctuation">(</span><span class="token number">12</span><span class="token punctuation">,</span> <span class="token number">7</span><span class="token punctuation">);</span> <span class="token comment">// 84</span>
-<span class="token function">lcm</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">],</span> <span class="token number">5</span><span class="token punctuation">);</span> <span class="token comment">// 60</span>
+<span class="token function">lcm</span><span class="token punctuation">(</span><span class="token operator">...</span><span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]);</span> <span class="token comment">// 60</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="luhncheck" class="section double-padded">luhnCheck</h3><div class="section double-padded"><p>Implementation of the <a href="https://en.wikipedia.org/wiki/Luhn_algorithm">Luhn Algorithm</a> used to validate a variety of identification numbers, such as credit card numbers, IMEI numbers, National Provider Identifier numbers etc.</p><p>Use <code>String.split('')</code>, <code>Array.reverse()</code> and <code>Array.map()</code> in combination with <code>parseInt()</code> to obtain an array of digits. Use <code>Array.splice(0,1)</code> to obtain the last digit. Use <code>Array.reduce()</code> to implement the Luhn Algorithm. Return <code>true</code> if <code>sum</code> is divisible by <code>10</code>, <code>false</code> otherwise.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">luhnCheck</span> <span class="token operator">=</span> num <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">let</span> arr <span class="token operator">=</span> <span class="token punctuation">(</span>num <span class="token operator">+</span> <span class="token string">''</span><span class="token punctuation">)
     .</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">)
@@ -745,36 +666,15 @@ own individual rating by supplying it as the third argument.
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">randomNumberInRange</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">);</span> <span class="token comment">// 6.0211363285087005</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="round" class="section double-padded">round</h3><div class="section double-padded"><p>Rounds a number to a specified amount of digits.</p><p>Use <code>Math.round()</code> and template literals to round the number to the specified number of digits. Omit the second argument, <code>decimals</code> to round to an integer.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">round</span> <span class="token operator">=</span> <span class="token punctuation">(</span>n<span class="token punctuation">,</span> decimals <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">Number</span><span class="token punctuation">(</span><span class="token template-string"><span class="token string">`${Math.round(`</span></span>$<span class="token punctuation">{</span>n<span class="token punctuation">}</span>e$<span class="token punctuation">{</span>decimals<span class="token punctuation">}</span><span class="token template-string"><span class="token string">`)}e-</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>decimals<span class="token interpolation-punctuation punctuation">}</span></span><span class="token string">`</span></span><span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">round</span><span class="token punctuation">(</span><span class="token number">1.005</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">);</span> <span class="token comment">// 1.01</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="solverpn" class="section double-padded">solveRPN</h3><div class="section double-padded"><p>Solves the given mathematical expression in <a href="https://en.wikipedia.org/wiki/Reverse_Polish_notation">reverse polish notation</a>. Throws appropriate errors if there are unrecognized symbols or the expression is wrong. The valid operators are :- <code>+</code>,<code>-</code>,<code>*</code>,<code>/</code>,<code>^</code>,<code>**</code> (<code>^</code>&amp;<code>**</code> are the exponential symbols and are same). This snippet does not supports any unary operators.</p><p>Use a dictionary, <code>OPERATORS</code> to specify each operator's matching mathematical operation. Use <code>String.replace()</code> with a regular expression to replace <code>^</code> with <code>**</code>, <code>String.split()</code> to tokenize the string and <code>Array.filter()</code> to remove empty tokens. Use <code>Array.forEach()</code> to parse each <code>symbol</code>, evaluate it as a numeric value or operator and solve the mathematical expression. Numeric values are converted to floating point numbers and pushed to a <code>stack</code>, while operators are evaluated using the <code>OPERATORS</code> dictionary and pop elements from the <code>stack</code> to apply operations.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">solveRPN</span> <span class="token operator">=</span> rpn <span class="token operator">=></span> <span class="token punctuation">{</span>
-  <span class="token keyword">const</span> OPERATORS <span class="token operator">=</span> <span class="token punctuation">{</span>
-    <span class="token string">'*'</span><span class="token punctuation">: (</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> a <span class="token operator">*</span> b<span class="token punctuation">,</span>
-    <span class="token string">'+'</span><span class="token punctuation">: (</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> a <span class="token operator">+</span> b<span class="token punctuation">,</span>
-    <span class="token string">'-'</span><span class="token punctuation">: (</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> a <span class="token operator">-</span> b<span class="token punctuation">,</span>
-    <span class="token string">'/'</span><span class="token punctuation">: (</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> a <span class="token operator">/</span> b<span class="token punctuation">,</span>
-    <span class="token string">'**'</span><span class="token punctuation">: (</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> a <span class="token operator">**</span> b
-  <span class="token punctuation">};</span>
-  <span class="token keyword">const</span> <span class="token punctuation">[</span>stack<span class="token punctuation">,</span> solve<span class="token punctuation">]</span> <span class="token operator">=</span> <span class="token punctuation">[
-    [],</span>
-    rpn
-      <span class="token punctuation">.</span><span class="token function">replace</span><span class="token punctuation">(</span><span class="token regex">/\^/g</span><span class="token punctuation">,</span> <span class="token string">'**'</span><span class="token punctuation">)
-      .</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token regex">/\s+/g</span><span class="token punctuation">)
-      .</span><span class="token function">filter</span><span class="token punctuation">(</span>el <span class="token operator">=> !</span><span class="token regex">/\s+/</span><span class="token punctuation">.</span><span class="token function">test</span><span class="token punctuation">(</span>el<span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> el <span class="token operator">!==</span> <span class="token string">''</span><span class="token punctuation">)
-  ];</span>
-  solve<span class="token punctuation">.</span><span class="token function">forEach</span><span class="token punctuation">(</span>symbol <span class="token operator">=></span> <span class="token punctuation">{</span>
-    <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span><span class="token function">isNaN</span><span class="token punctuation">(</span><span class="token function">parseFloat</span><span class="token punctuation">(</span>symbol<span class="token punctuation">))</span> <span class="token operator">&amp;&amp;</span> <span class="token function">isFinite</span><span class="token punctuation">(</span>symbol<span class="token punctuation">)) {</span>
-      stack<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span>symbol<span class="token punctuation">);
-    }</span> <span class="token keyword">else if</span> <span class="token punctuation">(</span>Object<span class="token punctuation">.</span><span class="token function">keys</span><span class="token punctuation">(</span>OPERATORS<span class="token punctuation">).</span><span class="token function">includes</span><span class="token punctuation">(</span>symbol<span class="token punctuation">)) {</span>
-      <span class="token keyword">const</span> <span class="token punctuation">[</span>a<span class="token punctuation">,</span> b<span class="token punctuation">]</span> <span class="token operator">=</span> <span class="token punctuation">[</span>stack<span class="token punctuation">.</span><span class="token function">pop</span><span class="token punctuation">(),</span> stack<span class="token punctuation">.</span><span class="token function">pop</span><span class="token punctuation">()];</span>
-      stack<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span>OPERATORS<span class="token punctuation">[</span>symbol<span class="token punctuation">](</span><span class="token function">parseFloat</span><span class="token punctuation">(</span>b<span class="token punctuation">),</span> <span class="token function">parseFloat</span><span class="token punctuation">(</span>a<span class="token punctuation">)));
-    }</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
-      <span class="token keyword">throw</span> <span class="token template-string"><span class="token string">`</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>symbol<span class="token interpolation-punctuation punctuation">}</span></span><span class="token string"> is not a recognized symbol`</span></span><span class="token punctuation">;
-    }
-  });</span>
-  <span class="token keyword">if</span> <span class="token punctuation">(</span>stack<span class="token punctuation">.</span>length <span class="token operator">===</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token keyword">return</span> stack<span class="token punctuation">.</span><span class="token function">pop</span><span class="token punctuation">();</span>
-  <span class="token keyword">else throw</span> <span class="token template-string"><span class="token string">`</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>rpn<span class="token interpolation-punctuation punctuation">}</span></span><span class="token string"> is not a proper RPN. Please check it and try again`</span></span><span class="token punctuation">;
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="sdbm" class="section double-padded">sbdm</h3><div class="section double-padded"><p>Hashes the input string into a whole number.</p><p>Use <code>String.split('')</code> and <code>Array.reduce()</code> to create a hash of the input string, utilizing bit shifting.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">sdbm</span> <span class="token operator">=</span> str <span class="token operator">=></span> <span class="token punctuation">{</span>
+  <span class="token keyword">let</span> arr <span class="token operator">=</span> str<span class="token punctuation">.</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">);</span>
+  <span class="token keyword">return</span> arr<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">(
+    (</span>hashCode<span class="token punctuation">,</span> currentVal<span class="token punctuation">)</span> <span class="token operator">=></span>
+      <span class="token punctuation">(</span>hashCode <span class="token operator">=</span> currentVal<span class="token punctuation">.</span><span class="token function">charCodeAt</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token punctuation">(</span>hashCode <span class="token operator">&lt;&lt;</span> <span class="token number">6</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token punctuation">(</span>hashCode <span class="token operator">&lt;&lt;</span> <span class="token number">16</span><span class="token punctuation">)</span> <span class="token operator">-</span> hashCode<span class="token punctuation">),</span>
+    <span class="token number">0</span>
+  <span class="token punctuation">);
 };</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">solveRPN</span><span class="token punctuation">(</span><span class="token string">'15 7 1 1 + - / 3 * 2 1 1 + + -'</span><span class="token punctuation">);</span> <span class="token comment">// 5</span>
-<span class="token function">solveRPN</span><span class="token punctuation">(</span><span class="token string">'2 3 ^'</span><span class="token punctuation">);</span> <span class="token comment">// 8</span>
+</pre><label class="collapse">Show examples</label><pre class="language-js">console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token function">sdbm</span><span class="token punctuation">(</span><span class="token string">'name'</span><span class="token punctuation">));</span> <span class="token comment">// -3521204949</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="standarddeviation" class="section double-padded">standardDeviation</h3><div class="section double-padded"><p>Returns the standard deviation of an array of numbers.</p><p>Use <code>Array.reduce()</code> to calculate the mean, variance and the sum of the variance of the values, the variance of the values, then determine the standard deviation. You can omit the second argument to get the sample standard deviation or set it to <code>true</code> to get the population standard deviation.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">standardDeviation</span> <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> usePopulation <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">const</span> mean <span class="token operator">=</span> arr<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>acc<span class="token punctuation">,</span> val<span class="token punctuation">)</span> <span class="token operator">=></span> acc <span class="token operator">+</span> val<span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token operator">/</span> arr<span class="token punctuation">.</span>length<span class="token punctuation">;</span>
   <span class="token keyword">return</span> Math<span class="token punctuation">.</span><span class="token function">sqrt</span><span class="token punctuation">(</span>
@@ -784,8 +684,8 @@ own individual rating by supplying it as the third argument.
 };</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">standardDeviation</span><span class="token punctuation">([</span><span class="token number">10</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">38</span><span class="token punctuation">,</span> <span class="token number">23</span><span class="token punctuation">,</span> <span class="token number">38</span><span class="token punctuation">,</span> <span class="token number">23</span><span class="token punctuation">,</span> <span class="token number">21</span><span class="token punctuation">]);</span> <span class="token comment">// 13.284434142114991 (sample)</span>
 <span class="token function">standardDeviation</span><span class="token punctuation">([</span><span class="token number">10</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">38</span><span class="token punctuation">,</span> <span class="token number">23</span><span class="token punctuation">,</span> <span class="token number">38</span><span class="token punctuation">,</span> <span class="token number">23</span><span class="token punctuation">,</span> <span class="token number">21</span><span class="token punctuation">],</span> <span class="token boolean">true</span><span class="token punctuation">);</span> <span class="token comment">// 12.29899614287479 (population)</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="sum" class="section double-padded">sum</h3><div class="section double-padded"><p>Returns the sum of two or more numbers/arrays.</p><p>Use <code>Array.reduce()</code> to add each value to an accumulator, initialized with a value of <code>0</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">sum</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">[].</span><span class="token function">concat</span><span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">).</span><span class="token function">reduce</span><span class="token punctuation">((</span>acc<span class="token punctuation">,</span> val<span class="token punctuation">)</span> <span class="token operator">=></span> acc <span class="token operator">+</span> val<span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">);</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">sum</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">]);</span> <span class="token comment">// 10</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="sum" class="section double-padded">sum</h3><div class="section double-padded"><p>Returns the sum of two or more numbers/arrays.</p><p>Use <code>Array.reduce()</code> to add each value to an accumulator, initialized with a value of <code>0</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">sum</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">[</span><span class="token operator">...</span>arr<span class="token punctuation">].</span><span class="token function">reduce</span><span class="token punctuation">((</span>acc<span class="token punctuation">,</span> val<span class="token punctuation">)</span> <span class="token operator">=></span> acc <span class="token operator">+</span> val<span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">);</span>
+</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">sum</span><span class="token punctuation">(</span><span class="token operator">...</span><span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">]);</span> <span class="token comment">// 10</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="sumpower" class="section double-padded">sumPower</h3><div class="section double-padded"><p>Returns the sum of the powers of all the numbers from <code>start</code> to <code>end</code> (both inclusive).</p><p>Use <code>Array.fill()</code> to create an array of all the numbers in the target range, <code>Array.map()</code> and the exponent operator (<code>**</code>) to raise them to <code>power</code> and <code>Array.reduce()</code> to add them together. Omit the second argument, <code>power</code>, to use a default power of <code>2</code>. Omit the third argument, <code>start</code>, to use a default starting value of <code>1</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">sumPower</span> <span class="token operator">=</span> <span class="token punctuation">(</span>end<span class="token punctuation">,</span> power <span class="token operator">=</span> <span class="token number">2</span><span class="token punctuation">,</span> start <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">=></span>
   <span class="token function">Array</span><span class="token punctuation">(</span>end <span class="token operator">+</span> <span class="token number">1</span> <span class="token operator">-</span> start<span class="token punctuation">)
     .</span><span class="token function">fill</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)
@@ -829,7 +729,7 @@ console<span class="token punctuation">.</span><span class="token function">log<
     <span class="token punctuation">(</span>c <span class="token operator">^</span> <span class="token punctuation">(</span>crypto<span class="token punctuation">.</span><span class="token function">randomBytes</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">)[</span><span class="token number">0</span><span class="token punctuation">]</span> <span class="token operator">&amp;</span> <span class="token punctuation">(</span><span class="token number">15</span> <span class="token operator">>></span> <span class="token punctuation">(</span>c <span class="token operator">/</span> <span class="token number">4</span><span class="token punctuation">)))).</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token number">16</span><span class="token punctuation">)
   );</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">UUIDGeneratorNode</span><span class="token punctuation">();</span> <span class="token comment">// '79c7c136-60ee-40a2-beb2-856f1feabefc'</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><h2 style="text-align:center">Object</h2><div class="card fluid"><h3 id="cleanobj" class="section double-padded">cleanObj</h3><div class="section double-padded"><p>Removes any properties except the ones specified from a JSON object.</p><p>Use <code>Object.keys()</code> method to loop over given JSON object and deleting keys that are not <code>include</code>d in given array. Also if you give it a special key (<code>childIndicator</code>) it will search deeply inside it to apply function to inner objects too.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">cleanObj</span> <span class="token operator">=</span> <span class="token punctuation">(</span>obj<span class="token punctuation">,</span> keysToKeep <span class="token operator">=</span> <span class="token punctuation">[],</span> childIndicator<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><h2 style="text-align:center">Object</h2><div class="card fluid"><h3 id="cleanobj" class="section double-padded">cleanObj</h3><div class="section double-padded"><p>Removes any properties except the ones specified from a JSON object.</p><p>Use <code>Object.keys()</code> method to loop over given JSON object and deleting keys that are not included in given array. If you pass a special key,<code>childIndicator</code>, it will search deeply apply the function to inner objects, too.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">cleanObj</span> <span class="token operator">=</span> <span class="token punctuation">(</span>obj<span class="token punctuation">,</span> keysToKeep <span class="token operator">=</span> <span class="token punctuation">[],</span> childIndicator<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
   Object<span class="token punctuation">.</span><span class="token function">keys</span><span class="token punctuation">(</span>obj<span class="token punctuation">).</span><span class="token function">forEach</span><span class="token punctuation">(</span>key <span class="token operator">=></span> <span class="token punctuation">{</span>
     <span class="token keyword">if</span> <span class="token punctuation">(</span>key <span class="token operator">===</span> childIndicator<span class="token punctuation">) {</span>
       <span class="token function">cleanObj</span><span class="token punctuation">(</span>obj<span class="token punctuation">[</span>key<span class="token punctuation">],</span> keysToKeep<span class="token punctuation">,</span> childIndicator<span class="token punctuation">);
@@ -858,7 +758,7 @@ console<span class="token punctuation">.</span><span class="token function">log<
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">objectFromPairs</span><span class="token punctuation">([[</span><span class="token string">'a'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">], [</span><span class="token string">'b'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]]);</span> <span class="token comment">// {a: 1, b: 2}</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="objecttopairs" class="section double-padded">objectToPairs</h3><div class="section double-padded"><p>Creates an array of key-value pair arrays from an object.</p><p>Use <code>Object.keys()</code> and <code>Array.map()</code> to iterate over the object's keys and produce an array with key-value pairs.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">objectToPairs</span> <span class="token operator">=</span> obj <span class="token operator">=></span> Object<span class="token punctuation">.</span><span class="token function">keys</span><span class="token punctuation">(</span>obj<span class="token punctuation">).</span><span class="token function">map</span><span class="token punctuation">(</span>k <span class="token operator">=></span> <span class="token punctuation">[</span>k<span class="token punctuation">,</span> obj<span class="token punctuation">[</span>k<span class="token punctuation">]]);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">objectToPairs</span><span class="token punctuation">({</span> a<span class="token punctuation">:</span> <span class="token number">1</span><span class="token punctuation">,</span> b<span class="token punctuation">:</span> <span class="token number">2</span> <span class="token punctuation">});</span> <span class="token comment">// [['a',1],['b',2]])</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="orderby" class="section double-padded">orderBy</h3><div class="section double-padded"><p>Returns a sorted array of objects ordered by properties and orders.</p><p>Uses a custom implementation of sort, that reduces the props array argument with a default value of 0, it uses destructuring to swap the properties position depending on the order passed. If no orders array is passed it sort by 'asc' by default.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">orderBy</span> <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> props<span class="token punctuation">,</span> orders<span class="token punctuation">)</span> <span class="token operator">=></span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="orderby" class="section double-padded">orderBy</h3><div class="section double-padded"><p>Returns a sorted array of objects ordered by properties and orders.</p><p>Uses <code>Array.sort()</code>, <code>Array.reduce()</code> on the <code>props</code> array with a default value of <code>0</code>, use array destructuring to swap the properties position depending on the order passed. If no <code>orders</code> array is passed it sort by <code>'asc'</code> by default.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">orderBy</span> <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> props<span class="token punctuation">,</span> orders<span class="token punctuation">)</span> <span class="token operator">=></span>
   <span class="token punctuation">[</span><span class="token operator">...</span>arr<span class="token punctuation">].</span><span class="token function">sort</span><span class="token punctuation">((</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span>
     props<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>acc<span class="token punctuation">,</span> prop<span class="token punctuation">,</span> i<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
       <span class="token keyword">if</span> <span class="token punctuation">(</span>acc <span class="token operator">===</span> <span class="token number">0</span><span class="token punctuation">) {</span>
@@ -871,19 +771,19 @@ console<span class="token punctuation">.</span><span class="token function">log<
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> users <span class="token operator">=</span> <span class="token punctuation">[{</span> name<span class="token punctuation">:</span> <span class="token string">'fred'</span><span class="token punctuation">,</span> age<span class="token punctuation">:</span> <span class="token number">48</span> <span class="token punctuation">}, {</span> name<span class="token punctuation">:</span> <span class="token string">'barney'</span><span class="token punctuation">,</span> age<span class="token punctuation">:</span> <span class="token number">36</span> <span class="token punctuation">}, {</span> name<span class="token punctuation">:</span> <span class="token string">'fred'</span><span class="token punctuation">,</span> age<span class="token punctuation">:</span> <span class="token number">40</span> <span class="token punctuation">}];</span>
 <span class="token function">orderBy</span><span class="token punctuation">(</span>users<span class="token punctuation">, [</span><span class="token string">'name'</span><span class="token punctuation">,</span> <span class="token string">'age'</span><span class="token punctuation">], [</span><span class="token string">'asc'</span><span class="token punctuation">,</span> <span class="token string">'desc'</span><span class="token punctuation">]);</span> <span class="token comment">// [{name: 'barney', age: 36}, {name: 'fred', age: 48}, {name: 'fred', age: 40}]</span>
 <span class="token function">orderBy</span><span class="token punctuation">(</span>users<span class="token punctuation">, [</span><span class="token string">'name'</span><span class="token punctuation">,</span> <span class="token string">'age'</span><span class="token punctuation">]);</span> <span class="token comment">// [{name: 'barney', age: 36}, {name: 'fred', age: 40}, {name: 'fred', age: 48}]</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="select" class="section double-padded">select</h3><div class="section double-padded"><p>Retrieve a property that indicated by the selector from an object.</p><p>If the property does not exists returns <code>undefined</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">select</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token keyword">from</span><span class="token punctuation">,</span> selector<span class="token punctuation">)</span> <span class="token operator">=></span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="select" class="section double-padded">select</h3><div class="section double-padded"><p>Retrieve a property indicated by the selector from an object.</p><p>If the property does not exists returns <code>undefined</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">select</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token keyword">from</span><span class="token punctuation">,</span> selector<span class="token punctuation">)</span> <span class="token operator">=></span>
   selector<span class="token punctuation">.</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token string">'.'</span><span class="token punctuation">).</span><span class="token function">reduce</span><span class="token punctuation">((</span>prev<span class="token punctuation">,</span> cur<span class="token punctuation">)</span> <span class="token operator">=></span> prev <span class="token operator">&amp;&amp;</span> prev<span class="token punctuation">[</span>cur<span class="token punctuation">],</span> <span class="token keyword">from</span><span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> obj <span class="token operator">=</span> <span class="token punctuation">{</span> selector<span class="token punctuation">: {</span> to<span class="token punctuation">: {</span> val<span class="token punctuation">:</span> <span class="token string">'val to select'</span> <span class="token punctuation">} } };</span>
 <span class="token function">select</span><span class="token punctuation">(</span>obj<span class="token punctuation">,</span> <span class="token string">'selector.to.val'</span><span class="token punctuation">);</span> <span class="token comment">// 'val to select'</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="shallowclone" class="section double-padded">shallowClone</h3><div class="section double-padded"><p>Creates a shallow clone of an object.</p><p>Use <code>Object.assign()</code> and an empty object (<code>{}</code>) to create a shallow clone of the original.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">shallowClone</span> <span class="token operator">=</span> obj <span class="token operator">=></span> Object<span class="token punctuation">.</span><span class="token function">assign</span><span class="token punctuation">({},</span> obj<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> a <span class="token operator">=</span> <span class="token punctuation">{</span> x<span class="token punctuation">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span> y<span class="token punctuation">:</span> <span class="token number">1</span> <span class="token punctuation">};</span>
 <span class="token keyword">const</span> b <span class="token operator">=</span> <span class="token function">shallowClone</span><span class="token punctuation">(</span>a<span class="token punctuation">);</span> <span class="token comment">// a !== b</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="size" class="section double-padded">size</h3><div class="section double-padded"><p>Get size of arrays, objects or strings.</p><p>Get type of <code>value</code> (<code>array</code>, <code>object</code> or <code>string</code>). Use <code>length</code> property for arrays. Use <code>length</code> or <code>size</code> value if available or number of keys for objects. Use <code>size</code> of a <a href="https://developer.mozilla.org/en-US/docs/Web/API/Blob"><code>Blob</code> object</a> created from <code>value</code> for strings.</p><p>Split strings into array of characters with <code>split('')</code> and return its length.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">size</span> <span class="token operator">=</span> value <span class="token operator">=></span>
-  Array<span class="token punctuation">.</span><span class="token function">isArray</span><span class="token punctuation">(</span>value<span class="token punctuation">)</span>
-    <span class="token operator">?</span> value<span class="token punctuation">.</span>length
-    <span class="token punctuation">:</span> value <span class="token operator">&amp;&amp;</span> <span class="token keyword">typeof</span> value <span class="token operator">===</span> <span class="token string">'object'</span>
-      <span class="token operator">?</span> value<span class="token punctuation">.</span>size <span class="token operator">||</span> value<span class="token punctuation">.</span>length <span class="token operator">||</span> Object<span class="token punctuation">.</span><span class="token function">keys</span><span class="token punctuation">(</span>value<span class="token punctuation">).</span>length
-      <span class="token punctuation">:</span> <span class="token keyword">typeof</span> value <span class="token operator">===</span> <span class="token string">'string'</span> <span class="token operator">?</span> <span class="token keyword">new</span> <span class="token class-name">Blob</span><span class="token punctuation">([</span>value<span class="token punctuation">]).</span>size <span class="token punctuation">:</span> <span class="token number">0</span><span class="token punctuation">;</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="size" class="section double-padded">size</h3><div class="section double-padded"><p>Get size of arrays, objects or strings.</p><p>Get type of <code>val</code> (<code>array</code>, <code>object</code> or <code>string</code>). Use <code>length</code> property for arrays. Use <code>length</code> or <code>size</code> value if available or number of keys for objects. Use <code>size</code> of a <a href="https://developer.mozilla.org/en-US/docs/Web/API/Blob"><code>Blob</code> object</a> created from <code>val</code> for strings.</p><p>Split strings into array of characters with <code>split('')</code> and return its length.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">size</span> <span class="token operator">=</span> val <span class="token operator">=></span>
+  Array<span class="token punctuation">.</span><span class="token function">isArray</span><span class="token punctuation">(</span>val<span class="token punctuation">)</span>
+    <span class="token operator">?</span> val<span class="token punctuation">.</span>length
+    <span class="token punctuation">:</span> val <span class="token operator">&amp;&amp;</span> <span class="token keyword">typeof</span> val <span class="token operator">===</span> <span class="token string">'object'</span>
+      <span class="token operator">?</span> val<span class="token punctuation">.</span>size <span class="token operator">||</span> val<span class="token punctuation">.</span>length <span class="token operator">||</span> Object<span class="token punctuation">.</span><span class="token function">keys</span><span class="token punctuation">(</span>val<span class="token punctuation">).</span>length
+      <span class="token punctuation">:</span> <span class="token keyword">typeof</span> val <span class="token operator">===</span> <span class="token string">'string'</span> <span class="token operator">?</span> <span class="token keyword">new</span> <span class="token class-name">Blob</span><span class="token punctuation">([</span>val<span class="token punctuation">]).</span>size <span class="token punctuation">:</span> <span class="token number">0</span><span class="token punctuation">;</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">size</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]);</span> <span class="token comment">// 5</span>
 <span class="token function">size</span><span class="token punctuation">(</span><span class="token string">'size'</span><span class="token punctuation">);</span> <span class="token comment">// 4</span>
 <span class="token function">size</span><span class="token punctuation">({</span> one<span class="token punctuation">:</span> <span class="token number">1</span><span class="token punctuation">,</span> two<span class="token punctuation">:</span> <span class="token number">2</span><span class="token punctuation">,</span> three<span class="token punctuation">:</span> <span class="token number">3</span> <span class="token punctuation">});</span> <span class="token comment">// 3</span>
@@ -900,19 +800,19 @@ console<span class="token punctuation">.</span><span class="token function">log<
     );
 };</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">anagrams</span><span class="token punctuation">(</span><span class="token string">'abc'</span><span class="token punctuation">);</span> <span class="token comment">// ['abc','acb','bac','bca','cab','cba']</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="bytesize" class="section double-padded">byteSize</h3><div class="section double-padded"><p>Returns the length of string.</p><p>Convert a given string to a <a href="https://developer.mozilla.org/en-US/docs/Web/API/Blob"><code>Blob</code> Object</a> and find its <code>size</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">byteSize</span> <span class="token operator">=</span> str <span class="token operator">=></span> <span class="token keyword">new</span> <span class="token class-name">Blob</span><span class="token punctuation">([</span>str<span class="token punctuation">]).</span>size<span class="token punctuation">;</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="bytesize" class="section double-padded">byteSize</h3><div class="section double-padded"><p>Returns the length of a string in bytes.</p><p>Convert a given string to a <a href="https://developer.mozilla.org/en-US/docs/Web/API/Blob"><code>Blob</code> Object</a> and find its <code>size</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">byteSize</span> <span class="token operator">=</span> str <span class="token operator">=></span> <span class="token keyword">new</span> <span class="token class-name">Blob</span><span class="token punctuation">([</span>str<span class="token punctuation">]).</span>size<span class="token punctuation">;</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">byteSize</span><span class="token punctuation">(</span><span class="token string">'😀'</span><span class="token punctuation">);</span> <span class="token comment">// 4</span>
 <span class="token function">byteSize</span><span class="token punctuation">(</span><span class="token string">'Hello World'</span><span class="token punctuation">);</span> <span class="token comment">// 11</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="capitalize" class="section double-padded">capitalize</h3><div class="section double-padded"><p>Capitalizes the first letter of a string.</p><p>Use destructuring and <code>toUpperCase()</code> to capitalize first letter, <code>...rest</code> to get array of characters after first letter and then <code>Array.join('')</code> to make it a string again. Omit the <code>lowerRest</code> parameter to keep the rest of the string intact, or set it to <code>true</code> to convert to lowercase.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">capitalize</span> <span class="token operator">=</span> <span class="token punctuation">([</span>first<span class="token punctuation">,</span> <span class="token operator">...</span>rest<span class="token punctuation">],</span> lowerRest <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">)</span> <span class="token operator">=></span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="capitalize" class="section double-padded">capitalize</h3><div class="section double-padded"><p>Capitalizes the first letter of a string.</p><p>Use array destructuring and <code>String.toUpperCase()</code> to capitalize first letter, <code>...rest</code> to get array of characters after first letter and then <code>Array.join('')</code> to make it a string again. Omit the <code>lowerRest</code> parameter to keep the rest of the string intact, or set it to <code>true</code> to convert to lowercase.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">capitalize</span> <span class="token operator">=</span> <span class="token punctuation">([</span>first<span class="token punctuation">,</span> <span class="token operator">...</span>rest<span class="token punctuation">],</span> lowerRest <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">)</span> <span class="token operator">=></span>
   first<span class="token punctuation">.</span><span class="token function">toUpperCase</span><span class="token punctuation">()</span> <span class="token operator">+</span> <span class="token punctuation">(</span>lowerRest <span class="token operator">?</span> rest<span class="token punctuation">.</span><span class="token function">join</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">).</span><span class="token function">toLowerCase</span><span class="token punctuation">() :</span> rest<span class="token punctuation">.</span><span class="token function">join</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">));</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">capitalize</span><span class="token punctuation">(</span><span class="token string">'fooBar'</span><span class="token punctuation">);</span> <span class="token comment">// 'FooBar'</span>
 <span class="token function">capitalize</span><span class="token punctuation">(</span><span class="token string">'fooBar'</span><span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">);</span> <span class="token comment">// 'Foobar'</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="capitalizeeveryword" class="section double-padded">capitalizeEveryWord</h3><div class="section double-padded"><p>Capitalizes the first letter of every word in a string.</p><p>Use <code>replace()</code> to match the first character of each word and <code>toUpperCase()</code> to capitalize it.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">capitalizeEveryWord</span> <span class="token operator">=</span> str <span class="token operator">=></span> str<span class="token punctuation">.</span><span class="token function">replace</span><span class="token punctuation">(</span><span class="token regex">/\b[a-z]/g</span><span class="token punctuation">,</span> char <span class="token operator">=></span> char<span class="token punctuation">.</span><span class="token function">toUpperCase</span><span class="token punctuation">());</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="capitalizeeveryword" class="section double-padded">capitalizeEveryWord</h3><div class="section double-padded"><p>Capitalizes the first letter of every word in a string.</p><p>Use <code>String.replace()</code> to match the first character of each word and <code>String.toUpperCase()</code> to capitalize it.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">capitalizeEveryWord</span> <span class="token operator">=</span> str <span class="token operator">=></span> str<span class="token punctuation">.</span><span class="token function">replace</span><span class="token punctuation">(</span><span class="token regex">/\b[a-z]/g</span><span class="token punctuation">,</span> char <span class="token operator">=></span> char<span class="token punctuation">.</span><span class="token function">toUpperCase</span><span class="token punctuation">());</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">capitalizeEveryWord</span><span class="token punctuation">(</span><span class="token string">'hello world!'</span><span class="token punctuation">);</span> <span class="token comment">// 'Hello World!'</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="countvowels" class="section double-padded">countVowels</h3><div class="section double-padded"><p>Retuns <code>number</code> of vowels in provided string.</p><p>Use a regular expression to count the number of vowels <code>(A, E, I, O, U)</code> in a <code>string</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">countVowels</span> <span class="token operator">=</span> str <span class="token operator">=></span> <span class="token punctuation">(</span>str<span class="token punctuation">.</span><span class="token function">match</span><span class="token punctuation">(</span><span class="token regex">/[aeiou]/gi</span><span class="token punctuation">)</span> <span class="token operator">||</span> <span class="token punctuation">[]).</span>length<span class="token punctuation">;</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">countVowels</span><span class="token punctuation">(</span><span class="token string">'foobar'</span><span class="token punctuation">);</span> <span class="token comment">// 3</span>
 <span class="token function">countVowels</span><span class="token punctuation">(</span><span class="token string">'gym'</span><span class="token punctuation">);</span> <span class="token comment">// 0</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="escapehtml" class="section double-padded">escapeHTML</h3><div class="section double-padded"><p>Escapes a string for use in HTML.</p><p>Use <code>String.replace()</code> with a regex that matches the characters that need to be escaped, using a callback function to replace each character instance with its associated escaped character using a dictionary (object).</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">escapeHTML</span> <span class="token operator">=</span> str <span class="token operator">=></span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="escapehtml" class="section double-padded">escapeHTML</h3><div class="section double-padded"><p>Escapes a string for use in HTML.</p><p>Use <code>String.replace()</code> with a regexp that matches the characters that need to be escaped, using a callback function to replace each character instance with its associated escaped character using a dictionary (object).</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">escapeHTML</span> <span class="token operator">=</span> str <span class="token operator">=></span>
   str<span class="token punctuation">.</span><span class="token function">replace</span><span class="token punctuation">(</span>
     <span class="token regex">/[&amp;&lt;>'"]/g</span><span class="token punctuation">,</span>
     tag <span class="token operator">=></span>
@@ -925,9 +825,9 @@ console<span class="token punctuation">.</span><span class="token function">log<
       <span class="token punctuation">}[</span>tag<span class="token punctuation">]</span> <span class="token operator">||</span> tag<span class="token punctuation">)
   );</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">escapeHTML</span><span class="token punctuation">(</span><span class="token string">'&lt;a href="#">Me &amp; you&lt;/a>'</span><span class="token punctuation">);</span> <span class="token comment">// '&amp;lt;a href=&amp;quot;#&amp;quot;&amp;gt;Me &amp;amp; you&amp;lt;/a&amp;gt;'</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="escaperegexp" class="section double-padded">escapeRegExp</h3><div class="section double-padded"><p>Escapes a string to use in a regular expression.</p><p>Use <code>replace()</code> to escape special characters.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">escapeRegExp</span> <span class="token operator">=</span> str <span class="token operator">=></span> str<span class="token punctuation">.</span><span class="token function">replace</span><span class="token punctuation">(</span><span class="token regex">/[.*+?^${}()|[\]\\]/g</span><span class="token punctuation">,</span> <span class="token string">'\\$&amp;'</span><span class="token punctuation">);</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="escaperegexp" class="section double-padded">escapeRegExp</h3><div class="section double-padded"><p>Escapes a string to use in a regular expression.</p><p>Use <code>String.replace()</code> to escape special characters.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">escapeRegExp</span> <span class="token operator">=</span> str <span class="token operator">=></span> str<span class="token punctuation">.</span><span class="token function">replace</span><span class="token punctuation">(</span><span class="token regex">/[.*+?^${}()|[\]\\]/g</span><span class="token punctuation">,</span> <span class="token string">'\\$&amp;'</span><span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">escapeRegExp</span><span class="token punctuation">(</span><span class="token string">'(test)'</span><span class="token punctuation">);</span> <span class="token comment">// \\(test\\)</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="fromcamelcase" class="section double-padded">fromCamelCase</h3><div class="section double-padded"><p>Converts a string from camelcase.</p><p>Use <code>replace()</code> to remove underscores, hyphens, and spaces and convert words to camelcase. Omit the second argument to use a default separator of <code>_</code>.</p><pre class="language-js"><span class="token keyword">const</span> fromCamelCase <span class="token operator">=</span> <span class="token punctuation">(</span>str<span class="token punctuation">,</span> separator <span class="token operator">=</span> <span class="token string">'_'</span><span class="token punctuation">)</span> <span class="token operator">=></span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="fromcamelcase" class="section double-padded">fromCamelCase</h3><div class="section double-padded"><p>Converts a string from camelcase.</p><p>Use <code>String.replace()</code> to remove underscores, hyphens, and spaces and convert words to camelcase. Omit the second argument to use a default <code>separator</code> of <code>_</code>.</p><pre class="language-js"><span class="token keyword">const</span> fromCamelCase <span class="token operator">=</span> <span class="token punctuation">(</span>str<span class="token punctuation">,</span> separator <span class="token operator">=</span> <span class="token string">'_'</span><span class="token punctuation">)</span> <span class="token operator">=></span>
   str
     <span class="token punctuation">.</span><span class="token function">replace</span><span class="token punctuation">(</span><span class="token regex">/([a-z\d])([A-Z])/g</span><span class="token punctuation">,</span> <span class="token string">'$1'</span> <span class="token operator">+</span> separator <span class="token operator">+</span> <span class="token string">'$2'</span><span class="token punctuation">)
     .</span><span class="token function">replace</span><span class="token punctuation">(</span><span class="token regex">/([A-Z]+)([A-Z][a-z\d]+)/g</span><span class="token punctuation">,</span> <span class="token string">'$1'</span> <span class="token operator">+</span> separator <span class="token operator">+</span> <span class="token string">'$2'</span><span class="token punctuation">)
@@ -939,12 +839,12 @@ console<span class="token punctuation">.</span><span class="token function">log<
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">isAbsoluteURL</span><span class="token punctuation">(</span><span class="token string">'https://google.com'</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
 <span class="token function">isAbsoluteURL</span><span class="token punctuation">(</span><span class="token string">'ftp://www.myserver.net'</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
 <span class="token function">isAbsoluteURL</span><span class="token punctuation">(</span><span class="token string">'/foo/bar'</span><span class="token punctuation">);</span> <span class="token comment">// false</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="mask" class="section double-padded">mask</h3><div class="section double-padded"><p>Replaces all but the last <code>num</code> of characters with the specified mask character.</p><p>Use <code>String.slice()</code> to grab the portion of the characters that need to be masked and use <code>String.replace()</code> with a regex to replace every character with the mask character. Concatenate the masked characters with the remaining unmasked portion of the string. Omit the second argument, <code>num</code>, to keep a default of <code>4</code> characters unmasked. If <code>num</code> is negative, the unmasked characters will be at the start of the string. Omit the third argument, <code>mask</code>, to use a default character of <code>'*'</code> for the mask.</p><pre class="language-js"><span class="token keyword">const</span> mask <span class="token operator">=</span> <span class="token punctuation">(</span>cc<span class="token punctuation">,</span> num <span class="token operator">=</span> <span class="token number">4</span><span class="token punctuation">,</span> mask <span class="token operator">=</span> <span class="token string">'*'</span><span class="token punctuation">)</span> <span class="token operator">=></span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="mask" class="section double-padded">mask</h3><div class="section double-padded"><p>Replaces all but the last <code>num</code> of characters with the specified mask character.</p><p>Use <code>String.slice()</code> to grab the portion of the characters that need to be masked and use <code>String.replace()</code> with a regexp to replace every character with the mask character. Concatenate the masked characters with the remaining unmasked portion of the string. Omit the second argument, <code>num</code>, to keep a default of <code>4</code> characters unmasked. If <code>num</code> is negative, the unmasked characters will be at the start of the string. Omit the third argument, <code>mask</code>, to use a default character of <code>'*'</code> for the mask.</p><pre class="language-js"><span class="token keyword">const</span> mask <span class="token operator">=</span> <span class="token punctuation">(</span>cc<span class="token punctuation">,</span> num <span class="token operator">=</span> <span class="token number">4</span><span class="token punctuation">,</span> mask <span class="token operator">=</span> <span class="token string">'*'</span><span class="token punctuation">)</span> <span class="token operator">=></span>
   <span class="token punctuation">(</span><span class="token string">''</span> <span class="token operator">+</span> cc<span class="token punctuation">).</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token operator">-</span>num<span class="token punctuation">).</span><span class="token function">replace</span><span class="token punctuation">(</span><span class="token regex">/./g</span><span class="token punctuation">,</span> mask<span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token punctuation">(</span><span class="token string">''</span> <span class="token operator">+</span> cc<span class="token punctuation">).</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token operator">-</span>num<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">mask</span><span class="token punctuation">(</span><span class="token number">1234567890</span><span class="token punctuation">);</span> <span class="token comment">// '******7890'</span>
 <span class="token function">mask</span><span class="token punctuation">(</span><span class="token number">1234567890</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">);</span> <span class="token comment">// '*******890'</span>
 <span class="token function">mask</span><span class="token punctuation">(</span><span class="token number">1234567890</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">4</span><span class="token punctuation">,</span> <span class="token string">'$'</span><span class="token punctuation">);</span> <span class="token comment">// '1234$$$$$$'</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="palindrome" class="section double-padded">palindrome</h3><div class="section double-padded"><p>Returns <code>true</code> if the given string is a palindrome, <code>false</code> otherwise.</p><p>Convert string <code>toLowerCase()</code> and use <code>replace()</code> to remove non-alphanumeric characters from it. Then, <code>split('')</code> into individual characters, <code>reverse()</code>, <code>join('')</code> and compare to the original, unreversed string, after converting it <code>tolowerCase()</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">palindrome</span> <span class="token operator">=</span> str <span class="token operator">=></span> <span class="token punctuation">{</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="palindrome" class="section double-padded">palindrome</h3><div class="section double-padded"><p>Returns <code>true</code> if the given string is a palindrome, <code>false</code> otherwise.</p><p>Convert string <code>String.toLowerCase()</code> and use <code>String.replace()</code> to remove non-alphanumeric characters from it. Then, <code>String.split('')</code> into individual characters, <code>Array.reverse()</code>, <code>String.join('')</code> and compare to the original, unreversed string, after converting it <code>String.tolowerCase()</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">palindrome</span> <span class="token operator">=</span> str <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">const</span> s <span class="token operator">=</span> str<span class="token punctuation">.</span><span class="token function">toLowerCase</span><span class="token punctuation">().</span><span class="token function">replace</span><span class="token punctuation">(</span><span class="token regex">/[\W_]/g</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">);</span>
   <span class="token keyword">return</span> <span class="token punctuation">(</span>
     s <span class="token operator">===</span>
@@ -972,26 +872,17 @@ console<span class="token punctuation">.</span><span class="token function">log<
 <span class="token punctuation">};</span>
 <span class="token keyword">const</span> autoPluralize <span class="token operator">=</span> <span class="token function">pluralize</span><span class="token punctuation">(</span>PLURALS<span class="token punctuation">);</span>
 <span class="token function">autoPluralize</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token string">'person'</span><span class="token punctuation">);</span> <span class="token comment">// 'people'</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="repeatstring" class="section double-padded">repeatString</h3><div class="section double-padded"><p>Repeats a string n times using <code>String.repeat()</code></p><p>If no string is provided the default is <code>&quot;&quot;</code> and the default number of times is 2.</p><pre class="language-js"><span class="token keyword">const</span> repeatString <span class="token operator">=</span> <span class="token punctuation">(</span>str <span class="token operator">=</span> <span class="token string">''</span><span class="token punctuation">,</span> num <span class="token operator">=</span> <span class="token number">2</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
-  <span class="token keyword">return</span> num <span class="token operator">>=</span> <span class="token number">0</span> <span class="token operator">?</span> str<span class="token punctuation">.</span><span class="token function">repeat</span><span class="token punctuation">(</span>num<span class="token punctuation">) :</span> str<span class="token punctuation">;
-};</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">repeatString</span><span class="token punctuation">(</span><span class="token string">'abc'</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">);</span> <span class="token comment">// 'abcabcabc'</span>
-<span class="token function">repeatString</span><span class="token punctuation">(</span><span class="token string">'abc'</span><span class="token punctuation">);</span> <span class="token comment">// 'abcabc'</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="reversestring" class="section double-padded">reverseString</h3><div class="section double-padded"><p>Reverses a string.</p><p>Use <code>split('')</code> and <code>Array.reverse()</code> to reverse the order of the characters in the string. Combine characters to get a string using <code>join('')</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">reverseString</span> <span class="token operator">=</span> str <span class="token operator">=></span>
-  str
-    <span class="token punctuation">.</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">)
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="reversestring" class="section double-padded">reverseString</h3><div class="section double-padded"><p>Reverses a string.</p><p>Use the spread operator (<code>...</code>) and <code>Array.reverse()</code> to reverse the order of the characters in the string. Combine characters to get a string using <code>String.join('')</code>.</p><pre class="language-js">
+<span class="token keyword">const</span> <span class="token function-variable function">reverseString</span> <span class="token operator">=</span> str <span class="token operator">=></span>
+  <span class="token punctuation">[..</span>str<span class="token punctuation">]
     .</span><span class="token function">reverse</span><span class="token punctuation">()
     .</span><span class="token function">join</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">reverseString</span><span class="token punctuation">(</span><span class="token string">'foobar'</span><span class="token punctuation">);</span> <span class="token comment">// 'raboof'</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="sortcharactersinstring" class="section double-padded">sortCharactersInString</h3><div class="section double-padded"><p>Alphabetically sorts the characters in a string.</p><p>Split the string using <code>split('')</code>, <code>Array.sort()</code> utilizing <code>localeCompare()</code>, recombine using <code>join('')</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">sortCharactersInString</span> <span class="token operator">=</span> str <span class="token operator">=></span>
-  str
-    <span class="token punctuation">.</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">)
-    .</span><span class="token function">sort</span><span class="token punctuation">((</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> a<span class="token punctuation">.</span><span class="token function">localeCompare</span><span class="token punctuation">(</span>b<span class="token punctuation">))
-    .</span><span class="token function">join</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">);</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="sortcharactersinstring" class="section double-padded">sortCharactersInString</h3><div class="section double-padded"><p>Alphabetically sorts the characters in a string.</p><p>Use the spread operator (<code>...</code>), <code>Array.sort()</code> and <code>String.localeCompare()</code> to sort the characters in <code>str</code>, recombine using <code>String.join('')</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">sortCharactersInString</span> <span class="token operator">=</span> str <span class="token operator">=></span> <span class="token punctuation">[</span><span class="token operator">...</span>str<span class="token punctuation">].</span><span class="token function">sort</span><span class="token punctuation">((</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> a<span class="token punctuation">.</span><span class="token function">localeCompare</span><span class="token punctuation">(</span>b<span class="token punctuation">)).</span><span class="token function">join</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">sortCharactersInString</span><span class="token punctuation">(</span><span class="token string">'cabbage'</span><span class="token punctuation">);</span> <span class="token comment">// 'aabbceg'</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="splitlines" class="section double-padded">splitLines</h3><div class="section double-padded"><p>Splits a multiline string into an array of lines.</p><p>Use <code>String.split()</code> and a regular expression to match line breaks and create an array.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">splitLines</span> <span class="token operator">=</span> str <span class="token operator">=></span> str<span class="token punctuation">.</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token regex">/\r?\n/</span><span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">splitLines</span><span class="token punctuation">(</span><span class="token string">'This\nis a\nmultiline\nstring.\n'</span><span class="token punctuation">);</span> <span class="token comment">// ['This', 'is a', 'multiline', 'string' , '']</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="tocamelcase" class="section double-padded">toCamelCase</h3><div class="section double-padded"><p>Converts a string to camelcase.</p><p>Break the string into words and combine them capitalizing the first letter of each word. For more detailed explanation of this Regex, <a href="https://regex101.com/r/bMCgAB/1">visit this Site</a>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">toCamelCase</span> <span class="token operator">=</span> str <span class="token operator">=></span> <span class="token punctuation">{</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="tocamelcase" class="section double-padded">toCamelCase</h3><div class="section double-padded"><p>Converts a string to camelcase.</p><p>Break the string into words and combine them capitalizing the first letter of each word, using a regexp.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">toCamelCase</span> <span class="token operator">=</span> str <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">let</span> s <span class="token operator">=</span>
     str <span class="token operator">&amp;&amp;</span>
     str
@@ -1004,7 +895,7 @@ console<span class="token punctuation">.</span><span class="token function">log<
 <span class="token function">toCamelCase</span><span class="token punctuation">(</span><span class="token string">'Some label that needs to be camelized'</span><span class="token punctuation">);</span> <span class="token comment">// 'someLabelThatNeedsToBeCamelized'</span>
 <span class="token function">toCamelCase</span><span class="token punctuation">(</span><span class="token string">'some-javascript-property'</span><span class="token punctuation">);</span> <span class="token comment">// 'someJavascriptProperty'</span>
 <span class="token function">toCamelCase</span><span class="token punctuation">(</span><span class="token string">'some-mixed_string with spaces_underscores-and-hyphens'</span><span class="token punctuation">);</span> <span class="token comment">// 'someMixedStringWithSpacesUnderscoresAndHyphens'</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="tokebabcase" class="section double-padded">toKebabCase</h3><div class="section double-padded"><p>Converts a string to kebab case.</p><p>Break the string into words and combine them using <code>-</code> as a separator. For more detailed explanation of this Regex, <a href="https://regex101.com/r/bMCgAB/1">visit this Site</a>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">toKebabCase</span> <span class="token operator">=</span> str <span class="token operator">=></span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="tokebabcase" class="section double-padded">toKebabCase</h3><div class="section double-padded"><p>Converts a string to kebab case.</p><p>Break the string into words and combine them adding <code>-</code> as a separator, using a regexp.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">toKebabCase</span> <span class="token operator">=</span> str <span class="token operator">=></span>
   str <span class="token operator">&amp;&amp;</span>
   str
     <span class="token punctuation">.</span><span class="token function">match</span><span class="token punctuation">(</span><span class="token regex">/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g</span><span class="token punctuation">)
@@ -1015,7 +906,7 @@ console<span class="token punctuation">.</span><span class="token function">log<
 <span class="token function">toKebabCase</span><span class="token punctuation">(</span><span class="token string">'some-mixed_string With spaces_underscores-and-hyphens'</span><span class="token punctuation">);</span> <span class="token comment">// 'some-mixed-string-with-spaces-underscores-and-hyphens'</span>
 <span class="token function">toKebabCase</span><span class="token punctuation">(</span><span class="token string">'AllThe-small Things'</span><span class="token punctuation">);</span> <span class="token comment">// "all-the-small-things"</span>
 <span class="token function">toKebabCase</span><span class="token punctuation">(</span><span class="token string">'IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML'</span><span class="token punctuation">);</span> <span class="token comment">// "i-am-listening-to-fm-while-loading-different-url-on-my-browser-and-also-editing-xml-and-html"</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="tosnakecase" class="section double-padded">toSnakeCase</h3><div class="section double-padded"><p>Converts a string to snake case.</p><p>Break the string into words and combine them using <code>_</code> as a separator. For more detailed explanation of this Regex, <a href="https://regex101.com/r/bMCgAB/1">visit this Site</a>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">toSnakeCase</span> <span class="token operator">=</span> str <span class="token operator">=></span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="tosnakecase" class="section double-padded">toSnakeCase</h3><div class="section double-padded"><p>Converts a string to snake case.</p><p>Break the string into words and combine them adding <code>_</code> as a separator, using a regexp.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">toSnakeCase</span> <span class="token operator">=</span> str <span class="token operator">=></span>
   str <span class="token operator">&amp;&amp;</span>
   str
     <span class="token punctuation">.</span><span class="token function">match</span><span class="token punctuation">(</span><span class="token regex">/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g</span><span class="token punctuation">)
@@ -1026,7 +917,7 @@ console<span class="token punctuation">.</span><span class="token function">log<
 <span class="token function">toSnakeCase</span><span class="token punctuation">(</span><span class="token string">'some-mixed_string With spaces_underscores-and-hyphens'</span><span class="token punctuation">);</span> <span class="token comment">// 'some_mixed_string_with_spaces_underscores_and_hyphens'</span>
 <span class="token function">toSnakeCase</span><span class="token punctuation">(</span><span class="token string">'AllThe-small Things'</span><span class="token punctuation">);</span> <span class="token comment">// "all_the_smal_things"</span>
 <span class="token function">toSnakeCase</span><span class="token punctuation">(</span><span class="token string">'IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML'</span><span class="token punctuation">);</span> <span class="token comment">// "i_am_listening_to_fm_while_loading_different_url_on_my_browser_and_also_editing_some_xml_and_html"</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="truncatestring" class="section double-padded">truncateString</h3><div class="section double-padded"><p>Truncates a string up to a specified length.</p><p>Determine if the string's <code>length</code> is greater than <code>num</code>. Return the string truncated to the desired length, with <code>...</code> appended to the end or the original string.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">truncateString</span> <span class="token operator">=</span> <span class="token punctuation">(</span>str<span class="token punctuation">,</span> num<span class="token punctuation">)</span> <span class="token operator">=></span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="truncatestring" class="section double-padded">truncateString</h3><div class="section double-padded"><p>Truncates a string up to a specified length.</p><p>Determine if the string's <code>length</code> is greater than <code>num</code>. Return the string truncated to the desired length, with <code>'...'</code> appended to the end or the original string.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">truncateString</span> <span class="token operator">=</span> <span class="token punctuation">(</span>str<span class="token punctuation">,</span> num<span class="token punctuation">)</span> <span class="token operator">=></span>
   str<span class="token punctuation">.</span>length <span class="token operator">></span> num <span class="token operator">?</span> str<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> num <span class="token operator">></span> <span class="token number">3</span> <span class="token operator">?</span> num <span class="token operator">-</span> <span class="token number">3</span> <span class="token punctuation">:</span> num<span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">'...'</span> <span class="token punctuation">:</span> str<span class="token punctuation">;</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">truncateString</span><span class="token punctuation">(</span><span class="token string">'boomerang'</span><span class="token punctuation">,</span> <span class="token number">7</span><span class="token punctuation">);</span> <span class="token comment">// 'boom...'</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="unescapehtml" class="section double-padded">unescapeHTML</h3><div class="section double-padded"><p>Unescapes escaped HTML characters.</p><p>Use <code>String.replace()</code> with a regex that matches the characters that need to be unescaped, using a callback function to replace each escaped character instance with its associated unescaped character using a dictionary (object).</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">unescapeHTML</span> <span class="token operator">=</span> str <span class="token operator">=></span>
@@ -1042,59 +933,14 @@ console<span class="token punctuation">.</span><span class="token function">log<
       <span class="token punctuation">}[</span>tag<span class="token punctuation">]</span> <span class="token operator">||</span> tag<span class="token punctuation">)
   );</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">unescapeHTML</span><span class="token punctuation">(</span><span class="token string">'&amp;lt;a href=&amp;quot;#&amp;quot;&amp;gt;Me &amp;amp; you&amp;lt;/a&amp;gt;'</span><span class="token punctuation">);</span> <span class="token comment">// '&lt;a href="#">Me &amp; you&lt;/a>'</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="words" class="section double-padded">words</h3><div class="section double-padded"><p>Converts a given string into an array of words.</p><p>Use <code>String.split()</code> with a supplied pattern (defaults to non-alpha as a regex) to convert to an array of strings. Use <code>Array.filter()</code> to remove any empty strings. Omit the second argument to use the default regex.</p><pre class="language-js"><span class="token keyword">const</span> words <span class="token operator">=</span> <span class="token punctuation">(</span>str<span class="token punctuation">,</span> pattern <span class="token operator">=</span> <span class="token regex">/[^a-zA-Z-]+/</span><span class="token punctuation">)</span> <span class="token operator">=></span> str<span class="token punctuation">.</span><span class="token function">split</span><span class="token punctuation">(</span>pattern<span class="token punctuation">).</span><span class="token function">filter</span><span class="token punctuation">(</span>Boolean<span class="token punctuation">);</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="words" class="section double-padded">words</h3><div class="section double-padded"><p>Converts a given string into an array of words.</p><p>Use <code>String.split()</code> with a supplied pattern (defaults to non-alpha as a regexp) to convert to an array of strings. Use <code>Array.filter()</code> to remove any empty strings. Omit the second argument to use the default regexp.</p><pre class="language-js"><span class="token keyword">const</span> words <span class="token operator">=</span> <span class="token punctuation">(</span>str<span class="token punctuation">,</span> pattern <span class="token operator">=</span> <span class="token regex">/[^a-zA-Z-]+/</span><span class="token punctuation">)</span> <span class="token operator">=></span> str<span class="token punctuation">.</span><span class="token function">split</span><span class="token punctuation">(</span>pattern<span class="token punctuation">).</span><span class="token function">filter</span><span class="token punctuation">(</span>Boolean<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">words</span><span class="token punctuation">(</span><span class="token string">'I love javaScript!!'</span><span class="token punctuation">);</span> <span class="token comment">// ["I", "love", "javaScript"]</span>
 <span class="token function">words</span><span class="token punctuation">(</span><span class="token string">'python, javaScript &amp; coffee'</span><span class="token punctuation">);</span> <span class="token comment">// ["python", "javaScript", "coffee"]</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><h2 style="text-align:center">Utility</h2><div class="card fluid"><h3 id="cloneregexp" class="section double-padded">cloneRegExp</h3><div class="section double-padded"><p>Clones a regular expression.</p><p>Use <code>new RegExp()</code>, <code>RegExp.source</code> and <code>RegExp.flags</code> to clone the given regular expression.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">cloneRegExp</span> <span class="token operator">=</span> regExp <span class="token operator">=></span> <span class="token keyword">new</span> <span class="token class-name">RegExp</span><span class="token punctuation">(</span>regExp<span class="token punctuation">.</span>source<span class="token punctuation">,</span> regExp<span class="token punctuation">.</span>flags<span class="token punctuation">);</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> regExp <span class="token operator">=</span> <span class="token regex">/lorem ipsum/gi</span><span class="token punctuation">;</span>
-<span class="token keyword">const</span> regExp2 <span class="token operator">=</span> <span class="token function">cloneRegExp</span><span class="token punctuation">(</span>regExp<span class="token punctuation">);</span> <span class="token comment">// /lorem ipsum/gi</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="coalesce" class="section double-padded">coalesce</h3><div class="section double-padded"><p>Returns the first non-null/undefined argument.</p><p>Use <code>Array.find()</code> to return the first non <code>null</code>/<code>undefined</code> argument.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">coalesce</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> args<span class="token punctuation">.</span><span class="token function">find</span><span class="token punctuation">(</span>_ <span class="token operator">=> !</span><span class="token punctuation">[</span>undefined<span class="token punctuation">,</span> <span class="token keyword">null</span><span class="token punctuation">].</span><span class="token function">includes</span><span class="token punctuation">(</span>_<span class="token punctuation">));</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">coalesce</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">,</span> undefined<span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">,</span> <span class="token number">NaN</span><span class="token punctuation">,</span> <span class="token string">'Waldo'</span><span class="token punctuation">);</span> <span class="token comment">// ""</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="coalescefactory" class="section double-padded">coalesceFactory</h3><div class="section double-padded"><p>Returns a customized coalesce function that returns the first argument that returns <code>true</code> from the provided argument validation function.</p><p>Use <code>Array.find()</code> to return the first argument that returns <code>true</code> from the provided argument validation function.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">coalesceFactory</span> <span class="token operator">=</span> valid <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> args<span class="token punctuation">.</span><span class="token function">find</span><span class="token punctuation">(</span>valid<span class="token punctuation">);</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> customCoalesce <span class="token operator">=</span> <span class="token function">coalesceFactory</span><span class="token punctuation">(</span>_ <span class="token operator">=> !</span><span class="token punctuation">[</span><span class="token keyword">null</span><span class="token punctuation">,</span> undefined<span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">,</span> <span class="token number">NaN</span><span class="token punctuation">].</span><span class="token function">includes</span><span class="token punctuation">(</span>_<span class="token punctuation">));</span>
-<span class="token function">customCoalesce</span><span class="token punctuation">(</span>undefined<span class="token punctuation">,</span> <span class="token keyword">null</span><span class="token punctuation">,</span> <span class="token number">NaN</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">,</span> <span class="token string">'Waldo'</span><span class="token punctuation">);</span> <span class="token comment">// "Waldo"</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="extendhex" class="section double-padded">extendHex</h3><div class="section double-padded"><p>Extends a 3-digit color code to a 6-digit color code.</p><p>Use <code>Array.map()</code>, <code>split()</code> and <code>Array.join()</code> to join the mapped array for converting a 3-digit RGB notated hexadecimal color-code to the 6-digit form. <code>String.slice()</code> is used to remove <code>#</code> from string start since it's added once.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">extendHex</span> <span class="token operator">=</span> shortHex <span class="token operator">=></span>
-  <span class="token string">'#'</span> <span class="token operator">+</span>
-  shortHex
-    <span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span>shortHex<span class="token punctuation">.</span><span class="token function">startsWith</span><span class="token punctuation">(</span><span class="token string">'#'</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token number">0</span><span class="token punctuation">)
-    .</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">)
-    .</span><span class="token function">map</span><span class="token punctuation">(</span>x <span class="token operator">=></span> x <span class="token operator">+</span> x<span class="token punctuation">)
-    .</span><span class="token function">join</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">);</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">extendHex</span><span class="token punctuation">(</span><span class="token string">'#03f'</span><span class="token punctuation">);</span> <span class="token comment">// '#0033ff'</span>
-<span class="token function">extendHex</span><span class="token punctuation">(</span><span class="token string">'05a'</span><span class="token punctuation">);</span> <span class="token comment">// '#0055aa'</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="gettype" class="section double-padded">getType</h3><div class="section double-padded"><p>Returns the native type of a value.</p><p>Returns lowercased constructor name of value, &quot;undefined&quot; or &quot;null&quot; if value is undefined or null</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">getType</span> <span class="token operator">=</span> v <span class="token operator">=></span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><h2 style="text-align:center">Type</h2><div class="card fluid"><h3 id="gettype" class="section double-padded">getType</h3><div class="section double-padded"><p>Returns the native type of a value.</p><p>Returns lowercased constructor name of value, <code>&quot;undefined&quot;</code> or <code>&quot;null&quot;</code> if value is <code>undefined</code> or <code>null</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">getType</span> <span class="token operator">=</span> v <span class="token operator">=></span>
   v <span class="token operator">===</span> undefined <span class="token operator">?</span> <span class="token string">'undefined'</span> <span class="token punctuation">:</span> v <span class="token operator">===</span> <span class="token keyword">null</span> <span class="token operator">?</span> <span class="token string">'null'</span> <span class="token punctuation">:</span> v<span class="token punctuation">.</span>constructor<span class="token punctuation">.</span>name<span class="token punctuation">.</span><span class="token function">toLowerCase</span><span class="token punctuation">();</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">getType</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Set</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">]));</span> <span class="token comment">// 'Set'</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="geturlparameters" class="section double-padded">getURLParameters</h3><div class="section double-padded"><p>Returns an object containing the parameters of the current URL.</p><p>Use <code>match()</code> with an appropriate regular expression to get all key-value pairs, <code>Array.reduce()</code> to map and combine them into a single object. Pass <code>location.search</code> as the argument to apply to the current <code>url</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">getURLParameters</span> <span class="token operator">=</span> url <span class="token operator">=></span>
-  url
-    <span class="token punctuation">.</span><span class="token function">match</span><span class="token punctuation">(</span><span class="token regex">/([^?=&amp;]+)(=([^&amp;]*))/g</span><span class="token punctuation">)
-    .</span><span class="token function">reduce</span><span class="token punctuation">((</span>a<span class="token punctuation">,</span> v<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">((</span>a<span class="token punctuation">[</span>v<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> v<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">'='</span><span class="token punctuation">))]</span> <span class="token operator">=</span> v<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span>v<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">'='</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">)),</span> a<span class="token punctuation">), {});</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">getURLParameters</span><span class="token punctuation">(</span><span class="token string">'http://url.com/page?name=Adam&amp;surname=Smith'</span><span class="token punctuation">);</span> <span class="token comment">// {name: 'Adam', surname: 'Smith'}</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="hextorgb" class="section double-padded">hexToRGB</h3><div class="section double-padded"><p>Converts a color code to a <code>rgb()</code> or <code>rgba()</code> string if alpha value is provided.</p><p>Use bitwise right-shift operator and mask bits with <code>&amp;</code> (and) operator to convert a hexadecimal color code (with or without prefixed with <code>#</code>) to a string with the RGB values. If it's 3-digit color code, first convert to 6-digit version. If an alpha value is provided alongside 6-digit hex, give <code>rgba()</code> string in return.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">hexToRGB</span> <span class="token operator">=</span> hex <span class="token operator">=></span> <span class="token punctuation">{</span>
-  <span class="token keyword">let</span> alpha <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">,</span>
-    h <span class="token operator">=</span> hex<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span>hex<span class="token punctuation">.</span><span class="token function">startsWith</span><span class="token punctuation">(</span><span class="token string">'#'</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token number">0</span><span class="token punctuation">);</span>
-  <span class="token keyword">if</span> <span class="token punctuation">(</span>h<span class="token punctuation">.</span>length <span class="token operator">===</span> <span class="token number">3</span><span class="token punctuation">)</span> h <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token operator">...</span>h<span class="token punctuation">].</span><span class="token function">map</span><span class="token punctuation">(</span>x <span class="token operator">=></span> x <span class="token operator">+</span> x<span class="token punctuation">).</span><span class="token function">join</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">);</span>
-  <span class="token keyword">else if</span> <span class="token punctuation">(</span>h<span class="token punctuation">.</span>length <span class="token operator">===</span> <span class="token number">8</span><span class="token punctuation">)</span> alpha <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;</span>
-  h <span class="token operator">=</span> <span class="token function">parseInt</span><span class="token punctuation">(</span>h<span class="token punctuation">,</span> <span class="token number">16</span><span class="token punctuation">);</span>
-  <span class="token keyword">return</span> <span class="token punctuation">(</span>
-    <span class="token string">'rgb'</span> <span class="token operator">+</span>
-    <span class="token punctuation">(</span>alpha <span class="token operator">?</span> <span class="token string">'a'</span> <span class="token punctuation">:</span> <span class="token string">''</span><span class="token punctuation">)</span> <span class="token operator">+</span>
-    <span class="token string">'('</span> <span class="token operator">+</span>
-    <span class="token punctuation">(</span>h <span class="token operator">>>></span> <span class="token punctuation">(</span>alpha <span class="token operator">?</span> <span class="token number">24</span> <span class="token punctuation">:</span> <span class="token number">16</span><span class="token punctuation">))</span> <span class="token operator">+</span>
-    <span class="token string">', '</span> <span class="token operator">+</span>
-    <span class="token punctuation">((</span>h <span class="token operator">&amp;</span> <span class="token punctuation">(</span>alpha <span class="token operator">?</span> <span class="token number">0x00ff0000</span> <span class="token punctuation">:</span> <span class="token number">0x00ff00</span><span class="token punctuation">))</span> <span class="token operator">>>></span> <span class="token punctuation">(</span>alpha <span class="token operator">?</span> <span class="token number">16</span> <span class="token punctuation">:</span> <span class="token number">8</span><span class="token punctuation">))</span> <span class="token operator">+</span>
-    <span class="token string">', '</span> <span class="token operator">+</span>
-    <span class="token punctuation">((</span>h <span class="token operator">&amp;</span> <span class="token punctuation">(</span>alpha <span class="token operator">?</span> <span class="token number">0x0000ff00</span> <span class="token punctuation">:</span> <span class="token number">0x0000ff</span><span class="token punctuation">))</span> <span class="token operator">>>></span> <span class="token punctuation">(</span>alpha <span class="token operator">?</span> <span class="token number">8</span> <span class="token punctuation">:</span> <span class="token number">0</span><span class="token punctuation">))</span> <span class="token operator">+</span>
-    <span class="token punctuation">(</span>alpha <span class="token operator">?</span> <span class="token template-string"><span class="token string">`, </span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>h <span class="token operator">&amp;</span> <span class="token number">0x000000ff</span><span class="token interpolation-punctuation punctuation">}</span></span><span class="token string">`</span></span> <span class="token punctuation">:</span> <span class="token string">''</span><span class="token punctuation">)</span> <span class="token operator">+</span>
-    <span class="token string">')'</span>
-  <span class="token punctuation">);
-};</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">hexToRGB</span><span class="token punctuation">(</span><span class="token string">'#27ae60ff'</span><span class="token punctuation">);</span> <span class="token comment">// 'rgba(39, 174, 96, 255)'</span>
-<span class="token function">hexToRGB</span><span class="token punctuation">(</span><span class="token string">'27ae60'</span><span class="token punctuation">);</span> <span class="token comment">// 'rgb(39, 174, 96)'</span>
-<span class="token function">hexToRGB</span><span class="token punctuation">(</span><span class="token string">'#fff'</span><span class="token punctuation">);</span> <span class="token comment">// 'rgb(255, 255, 255)'</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="isarray" class="section double-padded">isArray</h3><div class="section double-padded"><p>Checks if the given argument is an array.</p><p>Use <code>Array.isArray()</code> to check if a value is classified as an array.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">isArray</span> <span class="token operator">=</span> val <span class="token operator">=> !!</span>val <span class="token operator">&amp;&amp;</span> Array<span class="token punctuation">.</span><span class="token function">isArray</span><span class="token punctuation">(</span>val<span class="token punctuation">);</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">isArray</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">);</span> <span class="token comment">// false</span>
-<span class="token function">isArray</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">]);</span> <span class="token comment">// true</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="isarray" class="section double-padded">isArray</h3><div class="section double-padded"><p>Checks if the given argument is an array.</p><p>Use <code>Array.isArray()</code> to check if a value is classified as an array.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">isArray</span> <span class="token operator">=</span> val <span class="token operator">=></span> Array<span class="token punctuation">.</span><span class="token function">isArray</span><span class="token punctuation">(</span>val<span class="token punctuation">);</span>
+</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">isArray</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">]);</span> <span class="token comment">// true</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="isarraylike" class="section double-padded">isArrayLike</h3><div class="section double-padded"><p>Checks if the provided argument is array-like (i.e. is iterable).</p><p>Use the spread operator (<code>...</code>) to check if the provided argument is iterable inside a <code>try... catch</code> block and the comma operator (<code>,</code>) to return the appropriate value.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">isArrayLike</span> <span class="token operator">=</span> val <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">try</span> <span class="token punctuation">{</span>
     <span class="token keyword">return</span> <span class="token punctuation">[</span><span class="token operator">...</span>val<span class="token punctuation">],</span> <span class="token boolean">true</span><span class="token punctuation">;
@@ -1109,8 +955,7 @@ console<span class="token punctuation">.</span><span class="token function">log<
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">isBoolean</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">);</span> <span class="token comment">// false</span>
 <span class="token function">isBoolean</span><span class="token punctuation">(</span><span class="token boolean">false</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="isfunction" class="section double-padded">isFunction</h3><div class="section double-padded"><p>Checks if the given argument is a function.</p><p>Use <code>typeof</code> to check if a value is classified as a function primitive.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">isFunction</span> <span class="token operator">=</span> val <span class="token operator">=></span> <span class="token keyword">typeof</span> val <span class="token operator">===</span> <span class="token string">'function'</span><span class="token punctuation">;</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">isFunction</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">);</span> <span class="token comment">// false</span>
-<span class="token function">isFunction</span><span class="token punctuation">(</span><span class="token string">'x'</span><span class="token punctuation">);</span> <span class="token comment">// false</span>
+</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">isFunction</span><span class="token punctuation">(</span><span class="token string">'x'</span><span class="token punctuation">);</span> <span class="token comment">// false</span>
 <span class="token function">isFunction</span><span class="token punctuation">(</span>x <span class="token operator">=></span> x<span class="token punctuation">);</span> <span class="token comment">// true</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="isnull" class="section double-padded">isNull</h3><div class="section double-padded"><p>Returns <code>true</code> if the specified value is <code>null</code>, <code>false</code> otherwise.</p><p>Use the strict equality operator to check if the value and of <code>val</code> are equal to <code>null</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">isNull</span> <span class="token operator">=</span> val <span class="token operator">=></span> val <span class="token operator">===</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">isNull</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
@@ -1150,6 +995,50 @@ console<span class="token punctuation">.</span><span class="token function">log<
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">isValidJSON</span><span class="token punctuation">(</span><span class="token string">'{"name":"Adam","age":20}'</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
 <span class="token function">isValidJSON</span><span class="token punctuation">(</span><span class="token string">'{"name":"Adam",age:"20"}'</span><span class="token punctuation">);</span> <span class="token comment">// false</span>
 <span class="token function">isValidJSON</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><h2 style="text-align:center">Utility</h2><div class="card fluid"><h3 id="cloneregexp" class="section double-padded">cloneRegExp</h3><div class="section double-padded"><p>Clones a regular expression.</p><p>Use <code>new RegExp()</code>, <code>RegExp.source</code> and <code>RegExp.flags</code> to clone the given regular expression.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">cloneRegExp</span> <span class="token operator">=</span> regExp <span class="token operator">=></span> <span class="token keyword">new</span> <span class="token class-name">RegExp</span><span class="token punctuation">(</span>regExp<span class="token punctuation">.</span>source<span class="token punctuation">,</span> regExp<span class="token punctuation">.</span>flags<span class="token punctuation">);</span>
+</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> regExp <span class="token operator">=</span> <span class="token regex">/lorem ipsum/gi</span><span class="token punctuation">;</span>
+<span class="token keyword">const</span> regExp2 <span class="token operator">=</span> <span class="token function">cloneRegExp</span><span class="token punctuation">(</span>regExp<span class="token punctuation">);</span> <span class="token comment">// /lorem ipsum/gi</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="coalesce" class="section double-padded">coalesce</h3><div class="section double-padded"><p>Returns the first non-null/undefined argument.</p><p>Use <code>Array.find()</code> to return the first non <code>null</code>/<code>undefined</code> argument.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">coalesce</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> args<span class="token punctuation">.</span><span class="token function">find</span><span class="token punctuation">(</span>_ <span class="token operator">=> !</span><span class="token punctuation">[</span>undefined<span class="token punctuation">,</span> <span class="token keyword">null</span><span class="token punctuation">].</span><span class="token function">includes</span><span class="token punctuation">(</span>_<span class="token punctuation">));</span>
+</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">coalesce</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">,</span> undefined<span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">,</span> <span class="token number">NaN</span><span class="token punctuation">,</span> <span class="token string">'Waldo'</span><span class="token punctuation">);</span> <span class="token comment">// ""</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="coalescefactory" class="section double-padded">coalesceFactory</h3><div class="section double-padded"><p>Returns a customized coalesce function that returns the first argument that returns <code>true</code> from the provided argument validation function.</p><p>Use <code>Array.find()</code> to return the first argument that returns <code>true</code> from the provided argument validation function.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">coalesceFactory</span> <span class="token operator">=</span> valid <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> args<span class="token punctuation">.</span><span class="token function">find</span><span class="token punctuation">(</span>valid<span class="token punctuation">);</span>
+</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token keyword">const</span> customCoalesce <span class="token operator">=</span> <span class="token function">coalesceFactory</span><span class="token punctuation">(</span>_ <span class="token operator">=> !</span><span class="token punctuation">[</span><span class="token keyword">null</span><span class="token punctuation">,</span> undefined<span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">,</span> <span class="token number">NaN</span><span class="token punctuation">].</span><span class="token function">includes</span><span class="token punctuation">(</span>_<span class="token punctuation">));</span>
+<span class="token function">customCoalesce</span><span class="token punctuation">(</span>undefined<span class="token punctuation">,</span> <span class="token keyword">null</span><span class="token punctuation">,</span> <span class="token number">NaN</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">,</span> <span class="token string">'Waldo'</span><span class="token punctuation">);</span> <span class="token comment">// "Waldo"</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="extendhex" class="section double-padded">extendHex</h3><div class="section double-padded"><p>Extends a 3-digit color code to a 6-digit color code.</p><p>Use <code>Array.map()</code>, <code>String.split()</code> and <code>Array.join()</code> to join the mapped array for converting a 3-digit RGB notated hexadecimal color-code to the 6-digit form. <code>Array.slice()</code> is used to remove <code>#</code> from string start since it's added once.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">extendHex</span> <span class="token operator">=</span> shortHex <span class="token operator">=></span>
+  <span class="token string">'#'</span> <span class="token operator">+</span>
+  shortHex
+    <span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span>shortHex<span class="token punctuation">.</span><span class="token function">startsWith</span><span class="token punctuation">(</span><span class="token string">'#'</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token number">0</span><span class="token punctuation">)
+    .</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">)
+    .</span><span class="token function">map</span><span class="token punctuation">(</span>x <span class="token operator">=></span> x <span class="token operator">+</span> x<span class="token punctuation">)
+    .</span><span class="token function">join</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">);</span>
+</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">extendHex</span><span class="token punctuation">(</span><span class="token string">'#03f'</span><span class="token punctuation">);</span> <span class="token comment">// '#0033ff'</span>
+<span class="token function">extendHex</span><span class="token punctuation">(</span><span class="token string">'05a'</span><span class="token punctuation">);</span> <span class="token comment">// '#0055aa'</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="geturlparameters" class="section double-padded">getURLParameters</h3><div class="section double-padded"><p>Returns an object containing the parameters of the current URL.</p><p>Use <code>String.match()</code> with an appropriate regular expression to get all key-value pairs, <code>Array.reduce()</code> to map and combine them into a single object. Pass <code>location.search</code> as the argument to apply to the current <code>url</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">getURLParameters</span> <span class="token operator">=</span> url <span class="token operator">=></span>
+  url
+    <span class="token punctuation">.</span><span class="token function">match</span><span class="token punctuation">(</span><span class="token regex">/([^?=&amp;]+)(=([^&amp;]*))/g</span><span class="token punctuation">)
+    .</span><span class="token function">reduce</span><span class="token punctuation">((</span>a<span class="token punctuation">,</span> v<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">((</span>a<span class="token punctuation">[</span>v<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> v<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">'='</span><span class="token punctuation">))]</span> <span class="token operator">=</span> v<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span>v<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">'='</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">)),</span> a<span class="token punctuation">), {});</span>
+</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">getURLParameters</span><span class="token punctuation">(</span><span class="token string">'http://url.com/page?name=Adam&amp;surname=Smith'</span><span class="token punctuation">);</span> <span class="token comment">// {name: 'Adam', surname: 'Smith'}</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="hextorgb" class="section double-padded">hexToRGB<mark class="tag">advanced</mark></h3><div class="section double-padded"><p>Converts a color code to a <code>rgb()</code> or <code>rgba()</code> string if alpha value is provided.</p><p>Use bitwise right-shift operator and mask bits with <code>&amp;</code> (and) operator to convert a hexadecimal color code (with or without prefixed with <code>#</code>) to a string with the RGB values. If it's 3-digit color code, first convert to 6-digit version. If an alpha value is provided alongside 6-digit hex, give <code>rgba()</code> string in return.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">hexToRGB</span> <span class="token operator">=</span> hex <span class="token operator">=></span> <span class="token punctuation">{</span>
+  <span class="token keyword">let</span> alpha <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">,</span>
+    h <span class="token operator">=</span> hex<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span>hex<span class="token punctuation">.</span><span class="token function">startsWith</span><span class="token punctuation">(</span><span class="token string">'#'</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">1</span> <span class="token punctuation">:</span> <span class="token number">0</span><span class="token punctuation">);</span>
+  <span class="token keyword">if</span> <span class="token punctuation">(</span>h<span class="token punctuation">.</span>length <span class="token operator">===</span> <span class="token number">3</span><span class="token punctuation">)</span> h <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token operator">...</span>h<span class="token punctuation">].</span><span class="token function">map</span><span class="token punctuation">(</span>x <span class="token operator">=></span> x <span class="token operator">+</span> x<span class="token punctuation">).</span><span class="token function">join</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">);</span>
+  <span class="token keyword">else if</span> <span class="token punctuation">(</span>h<span class="token punctuation">.</span>length <span class="token operator">===</span> <span class="token number">8</span><span class="token punctuation">)</span> alpha <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;</span>
+  h <span class="token operator">=</span> <span class="token function">parseInt</span><span class="token punctuation">(</span>h<span class="token punctuation">,</span> <span class="token number">16</span><span class="token punctuation">);</span>
+  <span class="token keyword">return</span> <span class="token punctuation">(</span>
+    <span class="token string">'rgb'</span> <span class="token operator">+</span>
+    <span class="token punctuation">(</span>alpha <span class="token operator">?</span> <span class="token string">'a'</span> <span class="token punctuation">:</span> <span class="token string">''</span><span class="token punctuation">)</span> <span class="token operator">+</span>
+    <span class="token string">'('</span> <span class="token operator">+</span>
+    <span class="token punctuation">(</span>h <span class="token operator">>>></span> <span class="token punctuation">(</span>alpha <span class="token operator">?</span> <span class="token number">24</span> <span class="token punctuation">:</span> <span class="token number">16</span><span class="token punctuation">))</span> <span class="token operator">+</span>
+    <span class="token string">', '</span> <span class="token operator">+</span>
+    <span class="token punctuation">((</span>h <span class="token operator">&amp;</span> <span class="token punctuation">(</span>alpha <span class="token operator">?</span> <span class="token number">0x00ff0000</span> <span class="token punctuation">:</span> <span class="token number">0x00ff00</span><span class="token punctuation">))</span> <span class="token operator">>>></span> <span class="token punctuation">(</span>alpha <span class="token operator">?</span> <span class="token number">16</span> <span class="token punctuation">:</span> <span class="token number">8</span><span class="token punctuation">))</span> <span class="token operator">+</span>
+    <span class="token string">', '</span> <span class="token operator">+</span>
+    <span class="token punctuation">((</span>h <span class="token operator">&amp;</span> <span class="token punctuation">(</span>alpha <span class="token operator">?</span> <span class="token number">0x0000ff00</span> <span class="token punctuation">:</span> <span class="token number">0x0000ff</span><span class="token punctuation">))</span> <span class="token operator">>>></span> <span class="token punctuation">(</span>alpha <span class="token operator">?</span> <span class="token number">8</span> <span class="token punctuation">:</span> <span class="token number">0</span><span class="token punctuation">))</span> <span class="token operator">+</span>
+    <span class="token punctuation">(</span>alpha <span class="token operator">?</span> <span class="token template-string"><span class="token string">`, </span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>h <span class="token operator">&amp;</span> <span class="token number">0x000000ff</span><span class="token interpolation-punctuation punctuation">}</span></span><span class="token string">`</span></span> <span class="token punctuation">:</span> <span class="token string">''</span><span class="token punctuation">)</span> <span class="token operator">+</span>
+    <span class="token string">')'</span>
+  <span class="token punctuation">);
+};</span>
+</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">hexToRGB</span><span class="token punctuation">(</span><span class="token string">'#27ae60ff'</span><span class="token punctuation">);</span> <span class="token comment">// 'rgba(39, 174, 96, 255)'</span>
+<span class="token function">hexToRGB</span><span class="token punctuation">(</span><span class="token string">'27ae60'</span><span class="token punctuation">);</span> <span class="token comment">// 'rgb(39, 174, 96)'</span>
+<span class="token function">hexToRGB</span><span class="token punctuation">(</span><span class="token string">'#fff'</span><span class="token punctuation">);</span> <span class="token comment">// 'rgb(255, 255, 255)'</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="prettybytes" class="section double-padded">prettyBytes</h3><div class="section double-padded"><p>Converts a number in bytes to a human-readable string.</p><p>Use an array dictionary of units to be accessed based on the exponent. Use <code>Number.toPrecision()</code> to truncate the number to a certain number of digits. Return the prettified string by building it up, taking into account the supplied options and whether it is negative or not. Omit the second argument, <code>precision</code>, to use a default precision of <code>3</code> digits. Omit the third argument, <code>addSpace</code>, to add space between the number and unit by default.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">prettyBytes</span> <span class="token operator">=</span> <span class="token punctuation">(</span>num<span class="token punctuation">,</span> precision <span class="token operator">=</span> <span class="token number">3</span><span class="token punctuation">,</span> addSpace <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">const</span> UNITS <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token string">'B'</span><span class="token punctuation">,</span> <span class="token string">'KB'</span><span class="token punctuation">,</span> <span class="token string">'MB'</span><span class="token punctuation">,</span> <span class="token string">'GB'</span><span class="token punctuation">,</span> <span class="token string">'TB'</span><span class="token punctuation">,</span> <span class="token string">'PB'</span><span class="token punctuation">,</span> <span class="token string">'EB'</span><span class="token punctuation">,</span> <span class="token string">'ZB'</span><span class="token punctuation">,</span> <span class="token string">'YB'</span><span class="token punctuation">];</span>
   <span class="token keyword">if</span> <span class="token punctuation">(</span>Math<span class="token punctuation">.</span><span class="token function">abs</span><span class="token punctuation">(</span>num<span class="token punctuation">)</span> <span class="token operator">&lt;</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token keyword">return</span> num <span class="token operator">+</span> <span class="token punctuation">(</span>addSpace <span class="token operator">?</span> <span class="token string">' '</span> <span class="token punctuation">:</span> <span class="token string">''</span><span class="token punctuation">)</span> <span class="token operator">+</span> UNITS<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">];</span>
@@ -1165,17 +1054,8 @@ console<span class="token punctuation">.</span><span class="token function">log<
   <span class="token keyword">return</span> <span class="token string">'#'</span> <span class="token operator">+</span> <span class="token punctuation">(</span>n<span class="token punctuation">.</span>length <span class="token operator">!==</span> <span class="token number">6</span> <span class="token operator">?</span> <span class="token punctuation">((</span>Math<span class="token punctuation">.</span><span class="token function">random</span><span class="token punctuation">()</span> <span class="token operator">*</span> <span class="token number">0xf</span><span class="token punctuation">)</span> <span class="token operator">|</span> <span class="token number">0</span><span class="token punctuation">).</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token number">16</span><span class="token punctuation">)</span> <span class="token operator">+</span> n <span class="token punctuation">:</span> n<span class="token punctuation">);
 };</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">randomHexColorCode</span><span class="token punctuation">();</span> <span class="token comment">// "#e34155"</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="rgbtohex" class="section double-padded">RGBToHex</h3><div class="section double-padded"><p>Converts the values of RGB components to a color code.</p><p>Convert given RGB parameters to hexadecimal string using bitwise left-shift operator (<code>&lt;&lt;</code>) and <code>toString(16)</code>, then <code>padStart(6,'0')</code> to get a 6-digit hexadecimal value.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">RGBToHex</span> <span class="token operator">=</span> <span class="token punctuation">(</span>r<span class="token punctuation">,</span> g<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">((</span>r <span class="token operator">&lt;&lt;</span> <span class="token number">16</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token punctuation">(</span>g <span class="token operator">&lt;&lt;</span> <span class="token number">8</span><span class="token punctuation">)</span> <span class="token operator">+</span> b<span class="token punctuation">).</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token number">16</span><span class="token punctuation">).</span><span class="token function">padStart</span><span class="token punctuation">(</span><span class="token number">6</span><span class="token punctuation">,</span> <span class="token string">'0'</span><span class="token punctuation">);</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="rgbtohex" class="section double-padded">RGBToHex</h3><div class="section double-padded"><p>Converts the values of RGB components to a color code.</p><p>Convert given RGB parameters to hexadecimal string using bitwise left-shift operator (<code>&lt;&lt;</code>) and <code>toString(16)</code>, then <code>String.padStart(6,'0')</code> to get a 6-digit hexadecimal value.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">RGBToHex</span> <span class="token operator">=</span> <span class="token punctuation">(</span>r<span class="token punctuation">,</span> g<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">((</span>r <span class="token operator">&lt;&lt;</span> <span class="token number">16</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token punctuation">(</span>g <span class="token operator">&lt;&lt;</span> <span class="token number">8</span><span class="token punctuation">)</span> <span class="token operator">+</span> b<span class="token punctuation">).</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token number">16</span><span class="token punctuation">).</span><span class="token function">padStart</span><span class="token punctuation">(</span><span class="token number">6</span><span class="token punctuation">,</span> <span class="token string">'0'</span><span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">RGBToHex</span><span class="token punctuation">(</span><span class="token number">255</span><span class="token punctuation">,</span> <span class="token number">165</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">);</span> <span class="token comment">// 'ffa501'</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="sdbm" class="section double-padded">sbdm</h3><div class="section double-padded"><p>This algorithm is a simple hash-algorithm that hashes it input string <code>s</code> into a whole number.</p><p>Use <code>split('')</code> and <code>Array.reduce()</code> to create a hash of the input string, utilizing bit shifting.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">sdbm</span> <span class="token operator">=</span> str <span class="token operator">=></span> <span class="token punctuation">{</span>
-  <span class="token keyword">let</span> arr <span class="token operator">=</span> str<span class="token punctuation">.</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token string">''</span><span class="token punctuation">);</span>
-  <span class="token keyword">return</span> arr<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">(
-    (</span>hashCode<span class="token punctuation">,</span> currentVal<span class="token punctuation">)</span> <span class="token operator">=></span>
-      <span class="token punctuation">(</span>hashCode <span class="token operator">=</span> currentVal<span class="token punctuation">.</span><span class="token function">charCodeAt</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token punctuation">(</span>hashCode <span class="token operator">&lt;&lt;</span> <span class="token number">6</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token punctuation">(</span>hashCode <span class="token operator">&lt;&lt;</span> <span class="token number">16</span><span class="token punctuation">)</span> <span class="token operator">-</span> hashCode<span class="token punctuation">),</span>
-    <span class="token number">0</span>
-  <span class="token punctuation">);
-};</span>
-</pre><label class="collapse">Show examples</label><pre class="language-js">console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token function">sdbm</span><span class="token punctuation">(</span><span class="token string">'name'</span><span class="token punctuation">));</span> <span class="token comment">// -3521204949</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="timetaken" class="section double-padded">timeTaken</h3><div class="section double-padded"><p>Measures the time taken by a function to execute.</p><p>Use <code>console.time()</code> and <code>console.timeEnd()</code> to measure the difference between the start and end times to determine how long the callback took to execute.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">timeTaken</span> <span class="token operator">=</span> callback <span class="token operator">=></span> <span class="token punctuation">{</span>
   console<span class="token punctuation">.</span><span class="token function">time</span><span class="token punctuation">(</span><span class="token string">'timeTaken'</span><span class="token punctuation">);</span>
   <span class="token keyword">const</span> r <span class="token operator">=</span> <span class="token function">callback</span><span class="token punctuation">();</span>
@@ -1196,7 +1076,7 @@ console<span class="token punctuation">.</span><span class="token function">log<
     :</span> int <span class="token operator">+</span> ordinals<span class="token punctuation">[</span><span class="token number">3</span><span class="token punctuation">];
 };</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">toOrdinalSuffix</span><span class="token punctuation">(</span><span class="token string">'123'</span><span class="token punctuation">);</span> <span class="token comment">// "123rd"</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="validatenumber" class="section double-padded">validateNumber</h3><div class="section double-padded"><p>Returns <code>true</code> if the given value is a number, <code>false</code> otherwise.</p><p>Use <code>!isNaN</code> in combination with <code>parseFloat()</code> to check if the argument is a number. Use <code>isFinite()</code> to check if the number is finite. Use <code>Number()</code> to check if the coercion holds.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">validateNumber</span> <span class="token operator">=</span> n <span class="token operator">=> !</span><span class="token function">isNaN</span><span class="token punctuation">(</span><span class="token function">parseFloat</span><span class="token punctuation">(</span>n<span class="token punctuation">))</span> <span class="token operator">&amp;&amp;</span> <span class="token function">isFinite</span><span class="token punctuation">(</span>n<span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">Number</span><span class="token punctuation">(</span>n<span class="token punctuation">)</span> <span class="token operator">==</span> n<span class="token punctuation">;</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="validatenumber" class="section double-padded">validateNumber</h3><div class="section double-padded"><p>Returns <code>true</code> if the given value is a number, <code>false</code> otherwise.</p><p>Use <code>!isNaN()</code> in combination with <code>parseFloat()</code> to check if the argument is a number. Use <code>isFinite()</code> to check if the number is finite. Use <code>Number()</code> to check if the coercion holds.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">validateNumber</span> <span class="token operator">=</span> n <span class="token operator">=> !</span><span class="token function">isNaN</span><span class="token punctuation">(</span><span class="token function">parseFloat</span><span class="token punctuation">(</span>n<span class="token punctuation">))</span> <span class="token operator">&amp;&amp;</span> <span class="token function">isFinite</span><span class="token punctuation">(</span>n<span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token function">Number</span><span class="token punctuation">(</span>n<span class="token punctuation">)</span> <span class="token operator">==</span> n<span class="token punctuation">;</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">validateNumber</span><span class="token punctuation">(</span><span class="token string">'10'</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="yesno" class="section double-padded">yesNo</h3><div class="section double-padded"><p>Returns <code>true</code> if the string is <code>y</code>/<code>yes</code> or <code>false</code> if the string is <code>n</code>/<code>no</code>.</p><p>Use <code>RegExp.test()</code> to check if the string evaluates to <code>y/yes</code> or <code>n/no</code>. Omit the second argument, <code>def</code> to set the default answer as <code>no</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">yesNo</span> <span class="token operator">=</span> <span class="token punctuation">(</span>val<span class="token punctuation">,</span> def <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">)</span> <span class="token operator">=></span>
   <span class="token regex">/^(y|yes)$/i</span><span class="token punctuation">.</span><span class="token function">test</span><span class="token punctuation">(</span>val<span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token boolean">true</span> <span class="token punctuation">:</span> <span class="token regex">/^(n|no)$/i</span><span class="token punctuation">.</span><span class="token function">test</span><span class="token punctuation">(</span>val<span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token boolean">false</span> <span class="token punctuation">:</span> def<span class="token punctuation">;</span>
diff --git a/snippets/gcd.md b/snippets/gcd.md
index c1406bb62..5b3f7a29a 100644
--- a/snippets/gcd.md
+++ b/snippets/gcd.md
@@ -15,5 +15,5 @@ const gcd = (...arr) => {
 
 ```js
 gcd(8, 36); // 4
-gcd(...[12,8,32]); // 4
+gcd(...[12, 8, 32]); // 4
 ```
diff --git a/snippets/reverseString.md b/snippets/reverseString.md
index ad33f0a4c..4d1a2152e 100644
--- a/snippets/reverseString.md
+++ b/snippets/reverseString.md
@@ -6,6 +6,7 @@ Use the spread operator (`...`) and `Array.reverse()` to reverse the order of th
 Combine characters to get a string using `String.join('')`.
 
 ```js
+
 const reverseString = str =>
   [..str]
     .reverse()
diff --git a/snippets/sortCharactersInString.md b/snippets/sortCharactersInString.md
index 9ca8c4af3..49c808cd9 100644
--- a/snippets/sortCharactersInString.md
+++ b/snippets/sortCharactersInString.md
@@ -5,10 +5,7 @@ Alphabetically sorts the characters in a string.
 Use the spread operator (`...`), `Array.sort()` and  `String.localeCompare()` to sort the characters in `str`, recombine using `String.join('')`.
 
 ```js
-const sortCharactersInString = str =>
-  [...str]
-    .sort((a, b) => a.localeCompare(b))
-    .join('');
+const sortCharactersInString = str => [...str].sort((a, b) => a.localeCompare(b)).join('');
 ```
 
 ```js
diff --git a/tag_database b/tag_database
index ca925c056..71d8ccba9 100644
--- a/tag_database
+++ b/tag_database
@@ -123,7 +123,6 @@ readFileLines:node,array,string
 redirect:browser,url
 reducedFilter:array
 remove:array
-repeatString:string
 reverseString:string,array
 RGBToHex:utility
 round:math

From 94ca50bb507b169fe1a67ebacb3242ba442a823f Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 5 Jan 2018 16:51:58 +0200
Subject: [PATCH 11/14] Fixed builder for advanced snippet links

Resolves #159. Final  changes, multi-tagging complete.
---
 scripts/build.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/scripts/build.js b/scripts/build.js
index 292a214f4..1354de249 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -106,7 +106,7 @@ try {
     if (capitalizedTag === 'Uncategorized') {
       uncategorizedOutput += `### _${capitalizedTag}_\n\n<details>\n<summary>View contents</summary>\n\n`;
       for (const taggedSnippet of Object.entries(tagDbData).filter(v => v[1][0] === tag)) {
-        uncategorizedOutput += `* [\`${taggedSnippet[0]}\`](#${taggedSnippet[0].toLowerCase()})\n`;
+        uncategorizedOutput += `* [\`${taggedSnippet[0]}\`](#${taggedSnippet[0].toLowerCase()}${taggedSnippet[1].includes('advanced')?'-':''})\n`;
       }
       uncategorizedOutput += '\n</details>\n\n';
     } else {
@@ -114,7 +114,7 @@ try {
         EMOJIS[tag] || ''
       } ${capitalizedTag}\n\n<details>\n<summary>View contents</summary>\n\n`;
       for (const taggedSnippet of Object.entries(tagDbData).filter(v => v[1][0] === tag)) {
-        output += `* [\`${taggedSnippet[0]}\`](#${taggedSnippet[0].toLowerCase()})\n`;
+        output += `* [\`${taggedSnippet[0]}\`](#${taggedSnippet[0].toLowerCase()}${taggedSnippet[1].includes('advanced')?'-':''})\n`;
       }
       output += '\n</details>\n\n';
     }
@@ -137,7 +137,7 @@ try {
       output += `---\n ## ${EMOJIS[tag] || ''} ${capitalizedTag}\n`;
       for (const taggedSnippet of Object.entries(tagDbData).filter(v => v[1][0] === tag)) {
         let data = snippets[taggedSnippet[0] + '.md'];
-        // Add advanced tag 
+        // Add advanced tag
         if(taggedSnippet[1].includes('advanced')){
           data = data.split(/\r?\n/);
           data[0] = data[0] +' ![advanced](/advanced.svg)';

From 8ebd261e85cd8b23f815cf2a70b87bc6e031c229 Mon Sep 17 00:00:00 2001
From: 30secondsofcode <30secondsofcode@gmail.com>
Date: Fri, 5 Jan 2018 14:56:41 +0000
Subject: [PATCH 12/14] Travis build: 1043

---
 README.md                 | 11 ++++++-----
 docs/index.html           |  1 +
 snippets/reverseString.md |  1 +
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index 7248a6bee..a55c96372 100644
--- a/README.md
+++ b/README.md
@@ -143,7 +143,7 @@ average(1, 2, 3);
 
 * [`arrayToHtmlList`](#arraytohtmllist)
 * [`bottomVisible`](#bottomvisible)
-* [`copyToClipboard`](#copytoclipboard)
+* [`copyToClipboard`](#copytoclipboard-)
 * [`currentURL`](#currenturl)
 * [`detectDeviceType`](#detectdevicetype)
 * [`elementIsVisibleInViewport`](#elementisvisibleinviewport)
@@ -152,9 +152,9 @@ average(1, 2, 3);
 * [`hasClass`](#hasclass)
 * [`hide`](#hide)
 * [`httpsRedirect`](#httpsredirect)
-* [`onUserInputChange`](#onuserinputchange)
+* [`onUserInputChange`](#onuserinputchange-)
 * [`redirect`](#redirect)
-* [`runAsync`](#runasync)
+* [`runAsync`](#runasync-)
 * [`scrollToTop`](#scrolltotop)
 * [`setStyle`](#setstyle)
 * [`show`](#show)
@@ -210,7 +210,7 @@ average(1, 2, 3);
 * [`clampNumber`](#clampnumber)
 * [`digitize`](#digitize)
 * [`distance`](#distance)
-* [`elo`](#elo)
+* [`elo`](#elo-)
 * [`factorial`](#factorial)
 * [`fibonacci`](#fibonacci)
 * [`gcd`](#gcd)
@@ -327,7 +327,7 @@ average(1, 2, 3);
 * [`coalesceFactory`](#coalescefactory)
 * [`extendHex`](#extendhex)
 * [`getURLParameters`](#geturlparameters)
-* [`hexToRGB`](#hextorgb)
+* [`hexToRGB`](#hextorgb-)
 * [`prettyBytes`](#prettybytes)
 * [`randomHexColorCode`](#randomhexcolorcode)
 * [`RGBToHex`](#rgbtohex)
@@ -4121,6 +4121,7 @@ Combine characters to get a string using `String.join('')`.
 
 ```js
 
+
 const reverseString = str =>
   [..str]
     .reverse()
diff --git a/docs/index.html b/docs/index.html
index 5395dd4f0..537e1f41f 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -873,6 +873,7 @@ console<span class="token punctuation">.</span><span class="token function">log<
 <span class="token keyword">const</span> autoPluralize <span class="token operator">=</span> <span class="token function">pluralize</span><span class="token punctuation">(</span>PLURALS<span class="token punctuation">);</span>
 <span class="token function">autoPluralize</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token string">'person'</span><span class="token punctuation">);</span> <span class="token comment">// 'people'</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="reversestring" class="section double-padded">reverseString</h3><div class="section double-padded"><p>Reverses a string.</p><p>Use the spread operator (<code>...</code>) and <code>Array.reverse()</code> to reverse the order of the characters in the string. Combine characters to get a string using <code>String.join('')</code>.</p><pre class="language-js">
+
 <span class="token keyword">const</span> <span class="token function-variable function">reverseString</span> <span class="token operator">=</span> str <span class="token operator">=></span>
   <span class="token punctuation">[..</span>str<span class="token punctuation">]
     .</span><span class="token function">reverse</span><span class="token punctuation">()
diff --git a/snippets/reverseString.md b/snippets/reverseString.md
index 4d1a2152e..cde5dd825 100644
--- a/snippets/reverseString.md
+++ b/snippets/reverseString.md
@@ -7,6 +7,7 @@ Combine characters to get a string using `String.join('')`.
 
 ```js
 
+
 const reverseString = str =>
   [..str]
     .reverse()

From 5705b8f18b21c112417ccb945ada806b6624b902 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 5 Jan 2018 17:47:23 +0200
Subject: [PATCH 13/14] Update digitize.md

---
 snippets/digitize.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/snippets/digitize.md b/snippets/digitize.md
index 769b4e60c..9222ce30f 100644
--- a/snippets/digitize.md
+++ b/snippets/digitize.md
@@ -2,11 +2,11 @@
 
 Converts a number to an array of digits.
 
-Convert the number to a string, using spread operators in ES6(`[...string]`) build an array.
+Convert the number to a string, using the spread operator (`...`) to build an array.
 Use `Array.map()` and `parseInt()` to transform each value to an integer.
 
 ```js
-const digitize = n => [...(`${n}`)].map(i => parseInt(i));
+const digitize = n => [...`${n}`].map(i => parseInt(i));
 ```
 
 ```js

From dd872e106a69391f49e718edf66f33eb324546db Mon Sep 17 00:00:00 2001
From: 30secondsofcode <30secondsofcode@gmail.com>
Date: Fri, 5 Jan 2018 15:49:08 +0000
Subject: [PATCH 14/14] Travis build: 1045

---
 README.md                 | 5 +++--
 docs/index.html           | 3 ++-
 snippets/reverseString.md | 1 +
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index a55c96372..e0046efe5 100644
--- a/README.md
+++ b/README.md
@@ -2668,11 +2668,11 @@ clampNumber(1, -1, -5); // -1
 
 Converts a number to an array of digits.
 
-Convert the number to a string, using spread operators in ES6(`[...string]`) build an array.
+Convert the number to a string, using the spread operator (`...`) to build an array.
 Use `Array.map()` and `parseInt()` to transform each value to an integer.
 
 ```js
-const digitize = n => [...('' + n)].map(i => parseInt(i));
+const digitize = n => [...`${n}`].map(i => parseInt(i));
 ```
 
 <details>
@@ -4122,6 +4122,7 @@ Combine characters to get a string using `String.join('')`.
 ```js
 
 
+
 const reverseString = str =>
   [..str]
     .reverse()
diff --git a/docs/index.html b/docs/index.html
index 537e1f41f..b24a19120 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -543,7 +543,7 @@ document<span class="token punctuation">.</span>body<span class="token punctuati
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="clampnumber" class="section double-padded">clampNumber</h3><div class="section double-padded"><p>Clamps <code>num</code> within the inclusive range specified by the boundary values <code>a</code> and <code>b</code>.</p><p>If <code>num</code> falls within the range, return <code>num</code>. Otherwise, return the nearest number in the range.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">clampNumber</span> <span class="token operator">=</span> <span class="token punctuation">(</span>num<span class="token punctuation">,</span> a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> Math<span class="token punctuation">.</span><span class="token function">max</span><span class="token punctuation">(</span>Math<span class="token punctuation">.</span><span class="token function">min</span><span class="token punctuation">(</span>num<span class="token punctuation">,</span> Math<span class="token punctuation">.</span><span class="token function">max</span><span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)),</span> Math<span class="token punctuation">.</span><span class="token function">min</span><span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">));</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">clampNumber</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">);</span> <span class="token comment">// 3</span>
 <span class="token function">clampNumber</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">5</span><span class="token punctuation">);</span> <span class="token comment">// -1</span>
-</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="digitize" class="section double-padded">digitize</h3><div class="section double-padded"><p>Converts a number to an array of digits.</p><p>Convert the number to a string, using spread operators in ES6(<code>[...string]</code>) build an array. Use <code>Array.map()</code> and <code>parseInt()</code> to transform each value to an integer.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">digitize</span> <span class="token operator">=</span> n <span class="token operator">=></span> <span class="token punctuation">[</span><span class="token operator">...</span><span class="token punctuation">(</span><span class="token string">''</span> <span class="token operator">+</span> n<span class="token punctuation">)].</span><span class="token function">map</span><span class="token punctuation">(</span>i <span class="token operator">=></span> <span class="token function">parseInt</span><span class="token punctuation">(</span>i<span class="token punctuation">));</span>
+</pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="digitize" class="section double-padded">digitize</h3><div class="section double-padded"><p>Converts a number to an array of digits.</p><p>Convert the number to a string, using the spread operator (<code>...</code>) to build an array. Use <code>Array.map()</code> and <code>parseInt()</code> to transform each value to an integer.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">digitize</span> <span class="token operator">=</span> n <span class="token operator">=></span> <span class="token punctuation">[</span><span class="token operator">...</span><span class="token template-string"><span class="token string">`</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>n<span class="token interpolation-punctuation punctuation">}</span></span><span class="token string">`</span></span><span class="token punctuation">].</span><span class="token function">map</span><span class="token punctuation">(</span>i <span class="token operator">=></span> <span class="token function">parseInt</span><span class="token punctuation">(</span>i<span class="token punctuation">));</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">digitize</span><span class="token punctuation">(</span><span class="token number">123</span><span class="token punctuation">);</span> <span class="token comment">// [1, 2, 3]</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="distance" class="section double-padded">distance</h3><div class="section double-padded"><p>Returns the distance between two points.</p><p>Use <code>Math.hypot()</code> to calculate the Euclidean distance between two points.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">distance</span> <span class="token operator">=</span> <span class="token punctuation">(</span>x0<span class="token punctuation">,</span> y0<span class="token punctuation">,</span> x1<span class="token punctuation">,</span> y1<span class="token punctuation">)</span> <span class="token operator">=></span> Math<span class="token punctuation">.</span><span class="token function">hypot</span><span class="token punctuation">(</span>x1 <span class="token operator">-</span> x0<span class="token punctuation">,</span> y1 <span class="token operator">-</span> y0<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">distance</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">);</span> <span class="token comment">// 2.23606797749979</span>
@@ -874,6 +874,7 @@ console<span class="token punctuation">.</span><span class="token function">log<
 <span class="token function">autoPluralize</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token string">'person'</span><span class="token punctuation">);</span> <span class="token comment">// 'people'</span>
 </pre><button class="primary clipboard-copy"><img src="clipboard.svg" alt="clipboard">&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="reversestring" class="section double-padded">reverseString</h3><div class="section double-padded"><p>Reverses a string.</p><p>Use the spread operator (<code>...</code>) and <code>Array.reverse()</code> to reverse the order of the characters in the string. Combine characters to get a string using <code>String.join('')</code>.</p><pre class="language-js">
 
+
 <span class="token keyword">const</span> <span class="token function-variable function">reverseString</span> <span class="token operator">=</span> str <span class="token operator">=></span>
   <span class="token punctuation">[..</span>str<span class="token punctuation">]
     .</span><span class="token function">reverse</span><span class="token punctuation">()
diff --git a/snippets/reverseString.md b/snippets/reverseString.md
index cde5dd825..befdd8bf5 100644
--- a/snippets/reverseString.md
+++ b/snippets/reverseString.md
@@ -8,6 +8,7 @@ Combine characters to get a string using `String.join('')`.
 ```js
 
 
+
 const reverseString = str =>
   [..str]
     .reverse()