Format snippets

snippets/CSVToJSON.md

@@ -19,7 +19,10 @@ const CSVToJSON = (data, delimiter = ',') => {
     .split('\n')
     .map(v => {
       const values = v.split(delimiter);
-      return titles.reduce((obj, title, index) => ((obj[title] = values[index]), obj), {});
+      return titles.reduce(
+        (obj, title, index) => ((obj[title] = values[index]), obj),
+        {}
+      );
     });
 };
 ```

snippets/JSONtoCSV.md

@@ -16,10 +16,11 @@ const JSONtoCSV = (arr, columns, delimiter = ',') =>
     columns.join(delimiter),
     ...arr.map(obj =>
       columns.reduce(
-        (acc, key) => `${acc}${!acc.length ? '' : delimiter}"${!obj[key] ? '' : obj[key]}"`,
+        (acc, key) =>
+          `${acc}${!acc.length ? '' : delimiter}"${!obj[key] ? '' : obj[key]}"`,
         ''
       )
-    )
+    ),
   ].join('\n');
 ```
 

snippets/accumulate.md

@@ -9,7 +9,8 @@ Creates an array of partial sums.
 - Use `Array.prototype.slice(-1)`, the spread operator (`...`) and the unary `+` operator to add each value to the accumulator array containing the previous sums.
 
 ```js
-const accumulate = (...nums) => nums.reduce((acc, n) => [...acc, n + +acc.slice(-1)],[]);
+const accumulate = (...nums) =>
+  nums.reduce((acc, n) => [...acc, n + +acc.slice(-1)],[]);
 ```
 
 ```js

snippets/addMultipleEvents.md

@@ -9,8 +9,10 @@ Adds multiple event listeners with the same handler to an element.
 
 ```js
 const addMultipleListeners = (el, types, listener, options, useCapture) => {
-  types.forEach(type => el.addEventListener(type, listener, options, useCapture));
+  types.forEach(type =>
-}
+    el.addEventListener(type, listener, options, useCapture)
+  );
+};
 ```
 
 ```js

snippets/addWeekDays.md

@@ -12,12 +12,10 @@ Calculates the date after adding the ginen number of business days.
 
 ```js
 const addWeekDays = (startDate, count) =>
-  Array
+  Array.from({ length: count }).reduce(date => {
-    .from({ length: count })
-    .reduce(date => {
     date = new Date(date.setDate(date.getDate() + 1));
     if (date.getDay() % 6 === 0)
-        date = new Date(date.setDate(date.getDate() + ((date.getDay() / 6) + 1)));
+      date = new Date(date.setDate(date.getDate() + (date.getDay() / 6 + 1)));
     return date;
   }, startDate);
 ```

snippets/approximatelyEqual.md

@@ -9,7 +9,8 @@ Checks if two numbers are approximately equal to each other.
 - Omit the third parameter, `epsilon`, to use a default value of `0.001`.
 
 ```js
-const approximatelyEqual = (v1, v2, epsilon = 0.001) => Math.abs(v1 - v2) < epsilon;
+const approximatelyEqual = (v1, v2, epsilon = 0.001) =>
+  Math.abs(v1 - v2) < epsilon;
 ```
 
 ```js

snippets/average.md

@@ -9,7 +9,8 @@ Calculates the average of two or more numbers.
 - Divide the resulting array by its length.
 
 ```js
-const average = (...nums) => nums.reduce((acc, val) => acc + val, 0) / nums.length;
+const average = (...nums) =>
+  nums.reduce((acc, val) => acc + val, 0) / nums.length;
 ```
 
 ```js

snippets/bifurcate.md

@@ -10,7 +10,10 @@ Splits values into two groups, based on the result of the given `filter` array.
 
 ```js
 const bifurcate = (arr, filter) =>
-  arr.reduce((acc, val, i) => (acc[filter[i] ? 0 : 1].push(val), acc), [[], []]);
+  arr.reduce((acc, val, i) => (acc[filter[i] ? 0 : 1].push(val), acc), [
+    [],
+    [],
+  ]);
 ```
 
 ```js

snippets/bifurcateBy.md

@@ -10,7 +10,10 @@ Splits values into two groups, based on the result of the given filtering functi
 
 ```js
 const bifurcateBy = (arr, fn) =>
-  arr.reduce((acc, val, i) => (acc[fn(val, i) ? 0 : 1].push(val), acc), [[], []]);
+  arr.reduce((acc, val, i) => (acc[fn(val, i) ? 0 : 1].push(val), acc), [
+    [],
+    [],
+  ]);
 ```
 
 ```js

snippets/bottomVisible.md

@@ -10,7 +10,8 @@ Checks if the bottom of the page is visible.
 ```js
 const bottomVisible = () =>
   document.documentElement.clientHeight + window.scrollY >=
-  (document.documentElement.scrollHeight || document.documentElement.clientHeight);
+  (document.documentElement.scrollHeight ||
+    document.documentElement.clientHeight);
 ```
 
 ```js

snippets/capitalize.md

@@ -11,7 +11,8 @@ Capitalizes the first letter of a string.
 
 ```js
 const capitalize = ([first, ...rest], lowerRest = false) =>
-  first.toUpperCase() + (lowerRest ? rest.join('').toLowerCase() : rest.join(''));
+  first.toUpperCase() +
+  (lowerRest ? rest.join('').toLowerCase() : rest.join(''));
 ```
 
 ```js

snippets/capitalizeEveryWord.md

@@ -8,7 +8,8 @@ Capitalizes the first letter of every word in a string.
 - Use `String.prototype.replace()` to match the first character of each word and `String.prototype.toUpperCase()` to capitalize it.
 
 ```js
-const capitalizeEveryWord = str => str.replace(/\b[a-z]/g, char => char.toUpperCase());
+const capitalizeEveryWord = str =>
+  str.replace(/\b[a-z]/g, char => char.toUpperCase());
 ```
 
 ```js

snippets/clampNumber.md

@@ -9,7 +9,8 @@ Clamps `num` within the inclusive range specified by the boundary values `a` and
 - 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));
+const clampNumber = (num, a, b) =>
+  Math.max(Math.min(num, Math.max(a, b)), Math.min(a, b));
 ```
 
 ```js

snippets/cloneRegExp.md

@@ -1,6 +1,6 @@
 ---
 title: cloneRegExp
-tags: regexp,intermediate
+tags: type,intermediate
 ---
 
 Clones a regular expression.

snippets/coalesceFactory.md

@@ -12,6 +12,8 @@ const coalesceFactory = valid => (...args) => args.find(valid);
 ```
 
 ```js
-const customCoalesce = coalesceFactory(v => ![null, undefined, '', NaN].includes(v));
+const customCoalesce = coalesceFactory(
+  v => ![null, undefined, '', NaN].includes(v)
+);
 customCoalesce(undefined, null, NaN, '', 'Waldo'); // 'Waldo'
 ```

snippets/colorize.md

@@ -32,5 +32,6 @@ const colorize = (...args) => ({
 ```js
 console.log(colorize('foo').red); // 'foo' (red letters)
 console.log(colorize('foo', 'bar').bgBlue); // 'foo bar' (blue background)
-console.log(colorize(colorize('foo').yellow, colorize('foo').green).bgWhite); // 'foo bar' (first word in yellow letters, second word in green letters, white background for both)
+console.log(colorize(colorize('foo').yellow, colorize('foo').green).bgWhite); 
+// 'foo bar' (first word in yellow letters, second word in green letters, white background for both)
 ```

snippets/compact.md

@@ -12,5 +12,6 @@ const compact = arr => arr.filter(Boolean);
 ```
 
 ```js
-compact([0, 1, false, 2, '', 3, 'a', 'e' * 23, NaN, 's', 34]); // [ 1, 2, 3, 'a', 's', 34 ]
+compact([0, 1, false, 2, '', 3, 'a', 'e' * 23, NaN, 's', 34]); 
+// [ 1, 2, 3, 'a', 's', 34 ]
 ```

snippets/compose.md

@@ -9,7 +9,8 @@ Performs 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)));
+const compose = (...fns) =>
+  fns.reduce((f, g) => (...args) => f(g(...args)));
 ```
 
 ```js

snippets/composeRight.md

@@ -9,7 +9,8 @@ Performs left-to-right function composition.
 - The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.
 
 ```js
-const composeRight = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args)));
+const composeRight = (...fns) =>
+  fns.reduce((f, g) => (...args) => g(f(...args)));
 ```
 
 ```js

snippets/copyToClipboard.md

@@ -22,7 +22,9 @@ const copyToClipboard = str => {
   el.style.left = '-9999px';
   document.body.appendChild(el);
   const selected =
-    document.getSelection().rangeCount > 0 ? document.getSelection().getRangeAt(0) : false;
+    document.getSelection().rangeCount > 0
+      ? document.getSelection().getRangeAt(0)
+      : false;
   el.select();
   document.execCommand('copy');
   document.body.removeChild(el);

snippets/counter.md

@@ -26,5 +26,6 @@ const counter = (selector, start, end, step = 1, duration = 2000) => {
 ```
 
 ```js
-counter('#my-id', 1, 1000, 5, 2000); // Creates a 2-second timer for the element with id="my-id"
+counter('#my-id', 1, 1000, 5, 2000);
+// Creates a 2-second timer for the element with id="my-id"
 ```

snippets/createDirIfNotExists.md

@@ -14,5 +14,6 @@ const createDirIfNotExists = dir => (!fs.existsSync(dir) ? fs.mkdirSync(dir) : u
 ```
 
 ```js
-createDirIfNotExists('test'); // creates the directory 'test', if it doesn't exist
+createDirIfNotExists('test');
+// creates the directory 'test', if it doesn't exist
 ```

snippets/curry.md

@@ -1,6 +1,6 @@
 ---
 title: curry
-tags: function,recursion,intermediate
+tags: function,recursion,advanced
 ---
 
 Curries a function.

snippets/dayName.md

@@ -9,7 +9,8 @@ Gets the name of the weekday from a `Date` object.
 - Use the optional second parameter to get a language-specific name or omit it to use the default locale.
 
 ```js
-const dayName = (date, locale) => date.toLocaleDateString(locale, { weekday: 'long' });
+const dayName = (date, locale) =>
+  date.toLocaleDateString(locale, { weekday: 'long' });
 ```
 
 ```js

snippets/decapitalize.md

@@ -10,7 +10,8 @@ Decapitalizes the first letter of a string.
 
 ```js
 const decapitalize = ([first, ...rest], upperRest = false) =>
-  first.toLowerCase() + (upperRest ? rest.join('').toUpperCase() : rest.join(''));
+  first.toLowerCase() +
+  (upperRest ? rest.join('').toUpperCase() : rest.join(''));
 ```
 
 ```js

snippets/deepClone.md

@@ -17,7 +17,9 @@ const deepClone = obj => {
   if (obj === null) return null;
   let clone = Object.assign({}, obj);
   Object.keys(clone).forEach(
-    key => (clone[key] = typeof obj[key] === 'object' ? deepClone(obj[key]) : obj[key])
+    key =>
+      (clone[key] =
+        typeof obj[key] === 'object' ? deepClone(obj[key]) : obj[key])
   );
   if (Array.isArray(obj)) {
     clone.length = obj.length;

snippets/deepFlatten.md

@@ -10,7 +10,8 @@ Deep flattens an array.
 - Recursively flatten each element that is an array.
 
 ```js
-const deepFlatten = arr => [].concat(...arr.map(v => (Array.isArray(v) ? deepFlatten(v) : v)));
+const deepFlatten = arr =>
+  [].concat(...arr.map(v => (Array.isArray(v) ? deepFlatten(v) : v)));
 ```
 
 ```js

snippets/defaults.md

@@ -10,7 +10,8 @@ Assigns default values for all properties in an object that are `undefined`.
 - Finally, use `obj` again to overwrite properties that originally had a value.
 
 ```js
-const defaults = (obj, ...defs) => Object.assign({}, obj, ...defs.reverse(), obj);
+const defaults = (obj, ...defs) =>
+  Object.assign({}, obj, ...defs.reverse(), obj);
 ```
 
 ```js

snippets/defer.md

@@ -18,6 +18,8 @@ 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
+longRunningFunction();
-defer(longRunningFunction); // Browser will update the HTML then run the function
+// Browser will not update the HTML until this has finished
+defer(longRunningFunction);
+// Browser will update the HTML then run the function
 ```

snippets/detectDeviceType.md

@@ -9,7 +9,9 @@ Detects whether the page is being viewed on a mobile device or a desktop.
 
 ```js
 const detectDeviceType = () =>
-  /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)
+  /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(
+    navigator.userAgent
+  )
     ? 'Mobile'
     : 'Desktop';
 ```

snippets/differenceWith.md

@@ -14,6 +14,10 @@ const differenceWith = (arr, val, comp = (a, b) => a === b) =>
 ```
 
 ```js
-differenceWith([1, 1.2, 1.5, 3, 0], [1.9, 3, 0], (a, b) => Math.round(a) === Math.round(b)); // [1, 1.2]
+differenceWith(
+  [1, 1.2, 1.5, 3, 0],
+  [1.9, 3, 0],
+  (a, b) => Math.round(a) === Math.round(b)
+); // [1, 1.2]
 differenceWith([1, 1.2, 1.3], [1, 1.3, 1.5]); // [1.2]
 ```

snippets/drop.md

@@ -3,7 +3,7 @@ title: drop
 tags: array,beginner
 ---
 
-Returns a new array with `n` elements removed from the left.
+Creates a new array with `n` elements removed from the left.
 
 - Use `Array.prototype.slice()` to remove the specified number of elements from the left.
 

snippets/dropRight.md

@@ -3,7 +3,7 @@ title: dropRight
 tags: array,beginner
 ---
 
-Returns a new array with `n` elements removed from the right.
+Creates a new array with `n` elements removed from the right.
 
 - Use `Array.prototype.slice()` to remove the specified number of elements from the right.
 

snippets/elementContains.md

@@ -9,10 +9,13 @@ Checks if the `parent` element contains the `child` element.
 - Use `Node.contains()` to check if the `parent` element contains the `child` element.
 
 ```js
-const elementContains = (parent, child) => parent !== child && parent.contains(child);
+const elementContains = (parent, child) =>
+  parent !== child && parent.contains(child);
 ```
 
 ```js
-elementContains(document.querySelector('head'), document.querySelector('title')); // true
+elementContains(document.querySelector('head'), document.querySelector('title'));
-elementContains(document.querySelector('body'), document.querySelector('body')); // false
+// true
+elementContains(document.querySelector('body'), document.querySelector('body'));
+// false
 ```

snippets/elementIsVisibleInViewport.md

@@ -13,7 +13,8 @@ const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
   const { top, left, bottom, right } = el.getBoundingClientRect();
   const { innerHeight, innerWidth } = window;
   return partiallyVisible
-    ? ((top > 0 && top < innerHeight) || (bottom > 0 && bottom < innerHeight)) &&
+    ? ((top > 0 && top < innerHeight) ||
+        (bottom > 0 && bottom < innerHeight)) &&
         ((left > 0 && left < innerWidth) || (right > 0 && right < innerWidth))
     : top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth;
 };

snippets/equals.md

@@ -13,8 +13,10 @@ Performs a deep comparison between two values to determine if they are equivalen
 ```js
 const equals = (a, b) => {
   if (a === b) return true;
-  if (a instanceof Date && b instanceof Date) return a.getTime() === b.getTime();
+  if (a instanceof Date && b instanceof Date)
-  if (!a || !b || (typeof a !== 'object' && typeof b !== 'object')) return a === b;
+    return a.getTime() === b.getTime();
+  if (!a || !b || (typeof a !== 'object' && typeof b !== 'object'))
+    return a === b;
   if (a.prototype !== b.prototype) return false;
   let keys = Object.keys(a);
   if (keys.length !== Object.keys(b).length) return false;
@@ -23,6 +25,9 @@ const equals = (a, b) => {
 ```
 
 ```js
-equals({ a: [2, { e: 3 }], b: [4], c: 'foo' }, { a: [2, { e: 3 }], b: [4], c: 'foo' }); // true
+equals(
+  { a: [2, { e: 3 }], b: [4], c: 'foo' },
+  { a: [2, { e: 3 }], b: [4], c: 'foo' }
+); // true
 equals([1, 2, 3], { 0: 1, 1: 2, 2: 3 }); // true
 ```

snippets/filterNonUnique.md

@@ -3,12 +3,13 @@ title: filterNonUnique
 tags: array,beginner
 ---
 
-Returns an array with the non-unique values filtered out.
+Creates an array with the non-unique values filtered out.
 
 - Use `Array.prototype.filter()` to create an array containing only the unique values.
 
 ```js
-const filterNonUnique = arr => arr.filter(i => arr.indexOf(i) === arr.lastIndexOf(i));
+const filterNonUnique = arr =>
+  arr.filter(i => arr.indexOf(i) === arr.lastIndexOf(i));
 ```
 
 ```js

snippets/filterNonUniqueBy.md

@@ -3,7 +3,7 @@ title: filterNonUniqueBy
 tags: array,intermediate
 ---
 
-Returns an array with the non-unique values filtered out, based on a provided comparator function.
+Creates an array with the non-unique values filtered out, based on a provided comparator function.
 
 - Use `Array.prototype.filter()` and `Array.prototype.every()` to create an array containing only the unique values, based on the comparator function, `fn`.
 - The comparator function takes four arguments: the values of the two elements being compared and their indexes.

snippets/findKey.md

@@ -3,14 +3,15 @@ title: findKey
 tags: object,intermediate
 ---
 
-Returns the first key that satisfies the provided testing function.
+Finds the first key that satisfies the provided testing function.
 Otherwise `undefined` is returned.
 
 - Use `Object.keys(obj)` to get all the properties of the object, `Array.prototype.find()` to test each key-value pair using `fn`.
 - The callback receives three arguments - the value, the key and the object.
 
 ```js
-const findKey = (obj, fn) => Object.keys(obj).find(key => fn(obj[key], key, obj));
+const findKey = (obj, fn) => 
+  Object.keys(obj).find(key => fn(obj[key], key, obj));
 ```
 
 ```js

snippets/findLast.md

@@ -3,7 +3,7 @@ title: findLast
 tags: array,beginner
 ---
 
-Returns the last element for which the provided function returns a truthy value.
+Finds the last element for which the provided function returns a truthy value.
 
 - Use `Array.prototype.filter()` to remove elements for which `fn` returns falsy values.
 - Use `Array.prototype.pop()` to get the last element in the filtered array.

snippets/findLastIndex.md

@@ -3,7 +3,7 @@ title: findLastIndex
 tags: array,intermediate
 ---
 
-Returns the index of the last element for which the provided function returns a truthy value.
+Finds the index of the last element for which the provided function returns a truthy value.
 
 - Use `Array.prototype.map()` to map each element to an array with its index and value.
 - Use `Array.prototype.filter()` to remove elements for which `fn` returns falsy values

snippets/findLastKey.md

@@ -3,7 +3,7 @@ title: findLastKey
 tags: object,intermediate
 ---
 
-Returns the last key that satisfies the provided testing function.
+Finds the last key that satisfies the provided testing function.
 Otherwise `undefined` is returned.
 
 - Use `Object.keys(obj)` to get all the properties of the object.

snippets/flatten.md

@@ -12,7 +12,11 @@ Flattens an array up to the specified depth.
 
 ```js
 const flatten = (arr, depth = 1) =>
-  arr.reduce((a, v) => a.concat(depth > 1 && Array.isArray(v) ? flatten(v, depth - 1) : v), []);
+  arr.reduce(
+    (a, v) =>
+      a.concat(depth > 1 && Array.isArray(v) ? flatten(v, depth - 1) : v),
+    []
+  );
 ```
 
 ```js

snippets/forOwn.md

@@ -10,7 +10,8 @@ Iterates over all own properties of an object, running a callback for each one.
 - The callback receives three arguments - the value, the key and the object.
 
 ```js
-const forOwn = (obj, fn) => Object.keys(obj).forEach(key => fn(obj[key], key, obj));
+const forOwn = (obj, fn) =>
+  Object.keys(obj).forEach(key => fn(obj[key], key, obj));
 ```
 
 ```js

snippets/formatDuration.md

@@ -29,5 +29,6 @@ const formatDuration = ms => {
 
 ```js
 formatDuration(1001); // '1 second, 1 millisecond'
-formatDuration(34325055574); // '397 days, 6 hours, 44 minutes, 15 seconds, 574 milliseconds'
+formatDuration(34325055574);
+// '397 days, 6 hours, 44 minutes, 15 seconds, 574 milliseconds'
 ```

snippets/formatNumber.md

@@ -3,7 +3,7 @@ title: formatNumber
 tags: string,math,beginner
 ---
 
-Returns a number using the local number format order.
+Formats a number using the local number format order.
 
 - Use `Number.prototype.toLocaleString()` to convert a number to using the local number format separators.
 

snippets/fromCamelCase.md

@@ -18,7 +18,8 @@ const fromCamelCase = (str, separator = '_') =>
 
 ```js
 fromCamelCase('someDatabaseFieldName', ' '); // 'some database field name'
-fromCamelCase('someLabelThatNeedsToBeDecamelized', '-'); // 'some-label-that-needs-to-be-decamelized'
+fromCamelCase('someLabelThatNeedsToBeDecamelized', '-'); 
+// 'some-label-that-needs-to-be-decamelized'
 fromCamelCase('someJavascriptProperty', '_'); // 'some_javascript_property'
 fromCamelCase('JSONToCSV', '.'); // 'json.to.csv'
 ```

snippets/generateItems.md

@@ -13,5 +13,6 @@ const generateItems = (n, fn) => Array.from({ length: n }, (_, i) => fn(i));
 ```
 
 ```js
-generateItems(10, Math.random); // [0.21, 0.08, 0.40, 0.96, 0.96, 0.24, 0.19, 0.96, 0.42, 0.70]
+generateItems(10, Math.random);
+// [0.21, 0.08, 0.40, 0.96, 0.96, 0.24, 0.19, 0.96, 0.42, 0.70]
 ```

snippets/geometricProgression.md

@@ -12,9 +12,9 @@ Returns an error if `step` equals `1`.
 
 ```js
 const geometricProgression = (end, start = 1, step = 2) =>
-  Array.from({ length: Math.floor(Math.log(end / start) / Math.log(step)) + 1 }).map(
+  Array.from({
-    (_, i) => start * step ** i
+    length: Math.floor(Math.log(end / start) / Math.log(step)) + 1,
-  );
+  }).map((_, i) => start * step ** i);
 ```
 
 ```js

snippets/getBaseURL.md

@@ -13,5 +13,6 @@ const getBaseURL = url =>
 ```
 
 ```js
-getBaseURL('http://url.com/page?name=Adam&surname=Smith'); // 'http://url.com/page'
+getBaseURL('http://url.com/page?name=Adam&surname=Smith');
+// 'http://url.com/page'
 ```

snippets/getElementsBiggerThanViewport.md

@@ -11,7 +11,9 @@ Returns an array of HTML elements whose width is larger than that of the viewpor
 ```js
 const getElementsBiggerThanViewport = () => {
   const docWidth = document.documentElement.offsetWidth;
-  return [...document.querySelectorAll('*')].filter(el => el.offsetWidth > docWidth);
+  return [...document.querySelectorAll('*')].filter(
+    el => el.offsetWidth > docWidth
+  );
 };
 ```
 

snippets/getImages.md

@@ -12,7 +12,9 @@ Fetches all images from within an element and puts them into an array.
 
 ```js
 const getImages = (el, includeDuplicates = false) => {
-  const images = [...el.getElementsByTagName('img')].map(img => img.getAttribute('src'));
+  const images = [...el.getElementsByTagName('img')].map(img =>
+    img.getAttribute('src')
+  );
   return includeDuplicates ? images : [...new Set(images)];
 };
 ```

snippets/getURLParameters.md

@@ -3,7 +3,7 @@ title: getURLParameters
 tags: browser,string,regexp,intermediate
 ---
 
-Returns an object containing the parameters of the current URL.
+Creates an object containing the parameters of the current URL.
 
 - Use `String.prototype.match()` with an appropriate regular expression to get all key-value pairs.
 - Use `Array.prototype.reduce()` to map and combine them into a single object.
@@ -12,7 +12,9 @@ Returns an object containing the parameters of 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),
+    (a, v) => (
+      (a[v.slice(0, v.indexOf('='))] = v.slice(v.indexOf('=') + 1)), a
+    ),
     {}
   );
 ```

snippets/groupBy.md

@@ -10,7 +10,9 @@ Groups the elements of an array based on the given function.
 
 ```js
 const groupBy = (arr, fn) =>
-  arr.map(typeof fn === 'function' ? fn : val => val[fn]).reduce((acc, val, i) => {
+  arr
+    .map(typeof fn === 'function' ? fn : val => val[fn])
+    .reduce((acc, val, i) => {
       acc[val] = (acc[val] || []).concat(arr[i]);
       return acc;
     }, {});

snippets/hasFlags.md

@@ -10,7 +10,9 @@ Checks if the current process's arguments contain the specified flags.
 
 ```js
 const hasFlags = (...flags) =>
-  flags.every(flag => process.argv.includes(/^-{1,2}/.test(flag) ? flag : '--' + flag));
+  flags.every(flag =>
+    process.argv.includes(/^-{1,2}/.test(flag) ? flag : '--' + flag)
+  );
 ```
 
 ```js

snippets/hashBrowser.md

@@ -14,7 +14,9 @@ Returns a promise.
 
 ```js
 const hashBrowser = val =>
-  crypto.subtle.digest('SHA-256', new TextEncoder('utf-8').encode(val)).then(h => {
+  crypto.subtle
+    .digest('SHA-256', new TextEncoder('utf-8').encode(val))
+    .then(h => {
       let hexes = [],
         view = new DataView(h);
       for (let i = 0; i < view.byteLength; i += 4)

snippets/httpsRedirect.md

@@ -12,7 +12,8 @@ Redirects the page to HTTPS if it's currently in HTTP.
 
 ```js
 const httpsRedirect = () => {
-  if (location.protocol !== 'https:') location.replace('https://' + location.href.split('//')[1]);
+  if (location.protocol !== 'https:')
+    location.replace('https://' + location.href.split('//')[1]);
 };
 ```
 

snippets/indexOfAll.md

@@ -3,7 +3,7 @@ title: indexOfAll
 tags: array,intermediate
 ---
 
-Returns all indexes of `val` in an array.
+Finds all indexes of `val` in an array.
 If `val` never occurs, returns an empty array.
 
 - Use `Array.prototype.reduce()` to loop over elements and store indexes for matching elements.

snippets/initializeArrayWithRange.md

@@ -12,7 +12,10 @@ Initializes an array containing the numbers in the specified range where `start`
 
 ```js
 const initializeArrayWithRange = (end, start = 0, step = 1) =>
-  Array.from({ length: Math.ceil((end - start + 1) / step) }, (_, i) => i * step + start);
+  Array.from(
+    { length: Math.ceil((end - start + 1) / step) },
+    (_, i) => i * step + start
+  );
 ```
 
 ```js

snippets/initializeNDArray.md

@@ -12,7 +12,9 @@ Create a n-dimensional array with given value.
 const initializeNDArray = (val, ...args) =>
   args.length === 0
     ? val
-    : Array.from({ length: args[0] }).map(() => initializeNDArray(val, ...args.slice(1)));
+    : Array.from({ length: args[0] }).map(() =>
+        initializeNDArray(val, ...args.slice(1))
+      );
 ```
 
 ```js

snippets/injectCSS.md

@@ -17,7 +17,7 @@ const injectCSS = css => {
   el.innerText = css;
   document.head.appendChild(el);
   return el;
-}
+};
 ```
 
 ```js

snippets/isContainedIn.md

@@ -13,7 +13,10 @@ Checks if the elements of the first array are contained in the second one regard
 ```js
 const isContainedIn = (a, b) => {
   for (const v of new Set(a)) {
-    if (!b.some(e => e === v) || a.filter(e => e === v).length > b.filter(e => e === v).length)
+    if (
+      !b.some(e => e === v) ||
+      a.filter(e => e === v).length > b.filter(e => e === v).length
+    )
       return false;
   }
   return true;

snippets/isObject.md

@@ -3,7 +3,7 @@ title: isObject
 tags: type,object,beginner
 ---
 
-Returns a boolean determining if the passed value is an object or not.
+Checks if the passed value is an object or not.
 
 - Uses the `Object` constructor to create an object wrapper for the given value.
 - If the value is `null` or `undefined`, create and return an empty object.

snippets/isPrimitive.md

@@ -3,7 +3,7 @@ title: isPrimitive
 tags: type,intermediate
 ---
 
-Returns a boolean determining if the passed value is primitive or not.
+Checks if the passed value is primitive or not.
 
 - Create an object from `val` and compare it with `val` to determine if the passed value is primitive (i.e. not equal to the created object).
 

snippets/lcm.md

@@ -3,7 +3,7 @@ title: lcm
 tags: math,recursion,intermediate
 ---
 
-Returns the least common multiple of two or more numbers.
+Calculates the least common multiple of two or more numbers.
 
 - Use the greatest common divisor (GCD) formula and the fact that `lcm(x,y) = x * y / gcd(x,y)` to determine the least common multiple.
 - The GCD formula uses recursion.

snippets/listenOnce.md

@@ -9,7 +9,8 @@ Adds an event listener to an element that will only run the callback the first t
 - Use `{ once: true }` as options to only run the given callback once.
 
 ```js
-const listenOnce = (el, evt, fn) => el.addEventListener(evt, fn, { once: true });
+const listenOnce = (el, evt, fn) =>
+  el.addEventListener(evt, fn, { once: true });
 ```
 
 ```js

snippets/logBase.md

@@ -3,7 +3,7 @@ title: logBase
 tags: math,beginner
 ---
 
-Returns the logarithm of the given number in the given base.
+Calculates the logarithm of the given number in the given base.
 
 - Use `Math.log()` to get the logarithm from the value and the base and divide them.
 

snippets/longestItem.md

@@ -10,7 +10,8 @@ Takes any number of iterable objects or objects with a `length` property and ret
 - Returns `undefined` if no arguments are provided.
 
 ```js
-const longestItem = (...vals) => vals.reduce((a, x) => (x.length > a.length ? x : a));
+const longestItem = (...vals) =>
+  vals.reduce((a, x) => (x.length > a.length ? x : a));
 ```
 
 ```js

snippets/median.md

@@ -3,7 +3,7 @@ title: median
 tags: math,array,intermediate
 ---
 
-Returns the median of an array of numbers.
+Calculates the median of an array of numbers.
 
 - Find the middle of the array, use `Array.prototype.sort()` to sort the values.
 - Return the number at the midpoint if `Array.prototype.length` is odd, otherwise the average of the two middle numbers.