Linting

snippets/JSONToDate.md

@@ -7,7 +7,7 @@ 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 }/${ dt.getFullYear() }`
+  return `${dt.getDate()}/${dt.getMonth() + 1}/${dt.getFullYear()}`;
 };
 // JSONToDate(/Date(1489525200000)/) -> "14/3/2017"
 ```

snippets/JSONToFile.md

@@ -6,6 +6,6 @@ Use `fs.writeFile()`, template literals and `JSON.stringify()` to write a `json`
 
 ```js
 const fs = require('fs');
-const JSONToFile = (obj, filename) => fs.writeFile(`${filename}.json`, JSON.stringify(obj, null, 2))
+const JSONToFile = (obj, filename) => fs.writeFile(`${filename}.json`, JSON.stringify(obj, null, 2));
 // JSONToFile({test: "is passed"}, 'testJsonFile') -> writes the object to 'testJsonFile.json'
 ```

snippets/arrayGcd.md

@@ -5,10 +5,10 @@ Calculates the greatest common denominator (gcd) of an array of numbers.
 Use `Array.reduce()` and the `gcd` formula (uses recursion) to calculate the greatest common denominator of an array of numbers.
 
 ```js
-const arrayGcd = arr =>{
+const arrayGcd = arr => {
   const gcd = (x, y) => !y ? x : gcd(y, x % y);
-  return arr.reduce((a,b) => gcd(a,b));
-}
+  return arr.reduce((a, b) => gcd(a, b));
+};
 // arrayGcd([1,2,3,4,5]) -> 1
 // arrayGcd([4,8,12]) -> 4
 ```

snippets/arrayLcm.md

@@ -5,11 +5,11 @@ Calculates the lowest common multiple (lcm) of an array of numbers.
 Use `Array.reduce()` and the `lcm` formula (uses recursion) to calculate the lowest common multiple of an array of numbers.
 
 ```js
-const arrayLcm = arr =>{
+const arrayLcm = arr => {
   const gcd = (x, y) => !y ? x : gcd(y, x % y);
-  const lcm = (x, y) => (x*y)/gcd(x, y); 
-  return arr.reduce((a,b) => lcm(a,b));
-}
+  const lcm = (x, y) => (x * y) / gcd(x, y);
+  return arr.reduce((a, b) => lcm(a, b));
+};
 // arrayLcm([1,2,3,4,5]) -> 60
 // arrayLcm([4,8,12]) -> 24
 ```

snippets/arrayToHtmlList.md

@@ -5,6 +5,6 @@ Converts the given array elements into `<li>` tags and appends them to the list
 Use `Array.map()` and `document.querySelector()` to create a list of html tags.
 
 ```js
-const arrayToHtmlList = (arr, listID) => arr.map(item => document.querySelector("#"+listID).innerHTML+=`<li>${item}</li>`);
+const arrayToHtmlList = (arr, listID) => arr.map(item => document.querySelector('#' + listID).innerHTML += `<li>${item}</li>`);
 // arrayToHtmlList(['item 1', 'item 2'],'myListID')
 ```

snippets/call.md

@@ -5,7 +5,7 @@ Given a key and a set of arguments, call them when given a context. Primarily us
 Use a closure to call a stored key with stored arguments.
 
 ```js
-const call = ( key, ...args ) => context => context[ key ]( ...args );
+const call = (key, ...args) => context => context[ key ](...args);
 /*
 Promise.resolve( [ 1, 2, 3 ] ).then( call('map', x => 2 * x ) ).then( console.log ) //[ 2, 4, 6 ]
 const map = call.bind(null, 'map')

snippets/capitalize.md

@@ -6,7 +6,7 @@ Use destructuring and `toUpperCase()` to capitalize first letter, `...rest` to g
 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) =>
+const capitalize = ([first, ...rest], lowerRest = false) =>
   first.toUpperCase() + (lowerRest ? rest.join('').toLowerCase() : rest.join(''));
 // capitalize('myName') -> 'MyName'
 // capitalize('myName', true) -> 'Myname'

snippets/clampNumber.md

@@ -8,9 +8,9 @@ Otherwise, return the nearest number in the range.
 
 ```js
 const clampNumber = (num, lower, upper) => {
-  if(lower > upper) upper = [lower, lower = upper][0];
-  return (num>=lower && num<=upper) ? num : ((num < lower) ? lower : upper) 
-}
+  if (lower > upper) upper = [lower, lower = upper][0];
+  return (num >= lower && num <= upper) ? num : ((num < lower) ? lower : upper);
+};
 // clampNumber(2, 3, 5) -> 3
 // clampNumber(1, -1, -5) -> -1
 // clampNumber(3, 2, 4) -> 3

snippets/cleanObj.md

@@ -15,7 +15,7 @@ const cleanObj = (obj, keysToKeep = [], childIndicator) => {
     }
    });
   return obj;
-}
+};
 /*
   const testObj = {a: 1, b: 2, children: {a: 1, b: 2}}
   cleanObj(testObj, ["a"],"children") // { a: 1, children : { a: 1}}

snippets/coalesce.md

@@ -5,6 +5,6 @@ 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(_))
+const coalesce = (...args) => args.find(_ => ![undefined, null].includes(_));
 // coalesce(null,undefined,"",NaN, "Waldo") -> ""
 ```

snippets/collectInto.md

@@ -5,7 +5,7 @@ Changes a function that accepts an array into a variadic function.
 Given a function, return a closure that collects all inputs into an array-accepting function.
 
 ```js
-const collectInto = fn => ( ...args ) => fn( args );
+const collectInto = fn => (...args) => fn(args);
 /*
 const Pall = collectInto( Promise.all.bind(Promise) )
 let p1 = Promise.resolve(1)

snippets/detectDeviceType.md

@@ -5,7 +5,7 @@ Detects wether the website is being opened in a mobile device or a desktop/lapto
 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";
+const detectDeviceType = () => /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent) ? 'Mobile' : 'Desktop';
 // detectDeviceType() -> "Mobile"
 // detectDeviceType() -> "Desktop"
 ```

snippets/differenceWith.md

@@ -5,6 +5,6 @@ Filters out all values from an array for which the comparator function does not
 Use `Array.filter()` and `Array.find()` to find the appropriate values.
 
 ```js
-const differenceWith = (arr, val, comp) => arr.filter(a => !val.find(b => comp(a, b)))
+const differenceWith = (arr, val, comp) => arr.filter(a => !val.find(b => comp(a, b)));
 // differenceWith([1, 1.2, 1.5, 3], [1.9, 3], (a,b) => Math.round(a) == Math.round(b)) -> [1, 1.2]
 ```

snippets/digitize.md

@@ -6,6 +6,6 @@ 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));
 // digitize(2334) -> [2, 3, 3, 4]
 ```

snippets/dropRight.md

@@ -6,7 +6,7 @@ Use `Array.slice()` to slice the remove the specified number of elements from th
 
 ```js
 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) -> []
+// dropRight([1,2,3]) -> [1,2]
+// dropRight([1,2,3], 2) -> [1]
+// dropRight([1,2,3], 42) -> []
 ```

snippets/extendHex.md

@@ -6,7 +6,7 @@ Use `Array.map()`, `split()` and `Array.join()` to join the mapped array for con
 `String.slice()` is used to remove `#` from string start since it's added once.
 ```js
 const extendHex = shortHex =>
-  '#' + shortHex.slice(shortHex.startsWith('#') ? 1 : 0).split('').map(x => x+x).join('')
+  '#' + shortHex.slice(shortHex.startsWith('#') ? 1 : 0).split('').map(x => x + x).join('');
 // extendHex('#03f') -> '#0033ff'
 // extendHex('05a') -> '#0055aa'
 ```

snippets/factorial.md

@@ -9,7 +9,7 @@ Throws an exception if `n` is a negative number.
 
 ```js
 const factorial = n =>
-  n < 0 ? (() => { throw new TypeError('Negative numbers are not allowed!') })()
+  n < 0 ? (() => { throw new TypeError('Negative numbers are not allowed!'); })()
   : n <= 1 ? 1 : n * factorial(n - 1);
 // factorial(6) -> 720
 ```

snippets/fibonacciCountUntilNum.md

@@ -6,6 +6,6 @@ Use a mathematical formula to calculate the number of fibonacci numbers until `n
 
 ```js
 const fibonacciCountUntilNum = num =>
-  Math.ceil(Math.log(num * Math.sqrt(5) + 1/2) / Math.log((Math.sqrt(5)+1)/2));
+  Math.ceil(Math.log(num * Math.sqrt(5) + 1 / 2) / Math.log((Math.sqrt(5) + 1) / 2));
 // fibonacciCountUntilNum(10) -> 7
 ```

snippets/fibonacciUntilNum.md

@@ -8,8 +8,8 @@ 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));
+  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(15) -> [0,1,1,2,3,5,8,13]
 ```

snippets/flatten.md

@@ -5,6 +5,6 @@ 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 );
+const flatten = arr => [ ].concat(...arr);
 // flatten([1,[2],3,4]) -> [1,2,3,4]
 ```

snippets/flip.md

@@ -5,7 +5,7 @@ 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.
 
 ```js
-const flip = fn => (...args) => fn(args.pop(), ...args)
+const flip = fn => (...args) => fn(args.pop(), ...args);
 /*
 let a = {name: 'John Smith'}
 let b = {}

snippets/hexToRGB.md

@@ -10,14 +10,13 @@ const hexToRGB = hex => {
   if (h.length === 3) h = [...h].map(x => x + x).join('');
   else if (h.length === 8) alpha = true;
   h = parseInt(h, 16);
-  return 'rgb' + (alpha ? 'a' : '') + '('
-    + (h >>> (alpha ? 24 : 16)) + ', '
-    + ((h & (alpha ? 0x00ff0000 : 0x00ff00)) >>> (alpha ? 16 : 8)) + ', '
-    + ((h & (alpha ? 0x0000ff00 : 0x0000ff)) >>> (alpha ? 8 : 0))
-    + (alpha ? `, ${(h & 0x000000ff)}` : '') + ')';
+  return 'rgb' + (alpha ? 'a' : '') + '(' +
+    (h >>> (alpha ? 24 : 16)) + ', ' +
+    ((h & (alpha ? 0x00ff0000 : 0x00ff00)) >>> (alpha ? 16 : 8)) + ', ' +
+    ((h & (alpha ? 0x0000ff00 : 0x0000ff)) >>> (alpha ? 8 : 0)) +
+    (alpha ? `, ${(h & 0x000000ff)}` : '') + ')';
 };
 // hexToRGB('#27ae60ff') -> 'rgba(39, 174, 96, 255)'
 // hexToRGB('27ae60') -> 'rgb(39, 174, 96)'
 // hexToRGB('#fff') -> 'rgb(255, 255, 255)'
-
 ```

snippets/httpsRedirect.md

@@ -6,6 +6,6 @@ Use `location.protocol` to get the protocol currently being used. If it's not HT
 
 ```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/inRange.md

@@ -6,10 +6,10 @@ 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);
-}
+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);
+};
 // inRange(3, 2, 5) -> true
 // inRange(3, 4) -> true
 // inRange(2, 3, 5) -> false

snippets/isArmstrongNumber.md

@@ -6,7 +6,7 @@ Convert the given number into an array of digits. Use `Math.pow()` to get the ap
 
 ```js
 const isArmstrongNumber = digits =>
-  ( arr => arr.reduce( ( a, d ) => a + Math.pow( parseInt( d ), arr.length ), 0 ) == digits ? true : false )( ( digits+'' ).split( '' ) );
+  (arr => arr.reduce((a, d) => a + Math.pow(parseInt(d), arr.length), 0) == digits)((digits + '').split(''));
 // isArmstrongNumber(1634) -> true
 // isArmstrongNumber(371) -> true
 // isArmstrongNumber(56) -> false

snippets/lcm.md

@@ -6,9 +6,9 @@ Use the greatest common divisor (GCD) formula and `Math.abs()` to determine the
 The GCD formula uses recursion.
 
 ```js
-const lcm = (x,y) => {
+const lcm = (x, y) => {
   const gcd = (x, y) => !y ? x : gcd(y, x % y);
-  return Math.abs(x*y)/(gcd(x,y));
+  return Math.abs(x * y) / (gcd(x, y));
 };
 // lcm(12,7) -> 84
 ```

snippets/mapObject.md

@@ -6,7 +6,7 @@ Use an anonymous inner function scope to declare an undefined memory space, usin
 
 ```js
 const mapObject = (arr, fn) =>
-  (a => (a = [arr, arr.map(fn)], a[0].reduce( (acc,val,ind) => (acc[val] = a[1][ind], acc), {}) )) ( );
+  (a => (a = [arr, arr.map(fn)], a[0].reduce((acc, val, ind) => (acc[val] = a[1][ind], acc), {})))();
 /*
 const squareIt = arr => mapObject(arr, a => a*a)
 squareIt([1,2,3]) // { 1: 1, 2: 4, 3: 9 }

snippets/nthElement.md

@@ -7,7 +7,7 @@ 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];
+const nthElement = (arr, n = 0) => (n > 0 ? arr.slice(n, n + 1) : arr.slice(n))[0];
 // nthElement(['a','b','c'],1) -> 'b'
 // nthElement(['a','b','b'],-3) -> 'a'
 ```

snippets/primes.md

@@ -6,11 +6,11 @@ Generate an array from `2` to the given number. Use `Array.filter()` to filter o
 
 ```js
 const primes = num => {
-  let arr =  Array.from({length:num-1}).map((x,i)=> i+2), 
+  let arr = Array.from({length: num - 1}).map((x, i) => i + 2),
     sqroot = Math.floor(Math.sqrt(num)),
-    numsTillSqroot  = Array.from({length:sqroot-1}).map((x,i)=> i+2);
-  numsTillSqroot.forEach(x => arr = arr.filter(y => ((y%x)!==0)||(y==x)));
+    numsTillSqroot = Array.from({length: sqroot - 1}).map((x, i) => i + 2);
+  numsTillSqroot.forEach(x => arr = arr.filter(y => ((y % x) !== 0) || (y == x)));
   return arr;
-}
+};
 // primes(10) -> [2,3,5,7]
 ```

snippets/pullAtIndex.md

@@ -10,11 +10,11 @@ Use `Array.push()` to keep track of pulled values
 const pullAtIndex = (arr, pullArr) => {
   let removed = [];
   let pulled = arr.map((v, i) => pullArr.includes(i) ? removed.push(v) : v)
-                  .filter((v, i) => !pullArr.includes(i))
+                  .filter((v, i) => !pullArr.includes(i));
   arr.length = 0;
   pulled.forEach(v => arr.push(v));
   return removed;
-}
+};
 
 // let myArray = ['a', 'b', 'c', 'd'];
 // let pulled = pullAtIndex(myArray, [1, 3]);

snippets/pullAtValue.md

@@ -14,7 +14,7 @@ const pullAtValue = (arr, pullArr) => {
   arr.length = 0;
   mutateTo.forEach(v => arr.push(v));
   return removed;
-}
+};
 /*
 let myArray = ['a', 'b', 'c', 'd'];
 let pulled = pullAtValue(myArray, ['b', 'd']);

snippets/randomHexColor.md

@@ -6,10 +6,10 @@ Use `Math.random` to generate a random 24-bit(6x4bits) hexadecimal number. Use b
 
 ```js
 const randomHexColor = () => {
-    let n = (Math.random()*0xfffff|0).toString(16);
+  let n = (Math.random() * 0xfffff | 0).toString(16);
   return '#' + (n.length !== 6
-        ? (Math.random()*0xf|0).toString(16) + n : n);
-}
+        ? (Math.random() * 0xf | 0).toString(16) + n : n);
+};
 // randomHexColorCode() -> "#e34155"
 // randomHexColorCode() -> "#fd73a6"
 // randomHexColorCode() -> "#4144c6"

snippets/repeatString.md

@@ -5,9 +5,9 @@ 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) => {
+const repeatString = (str = '', num = 2) => {
   return num >= 0 ? str.repeat(num) : str;
-}
+};
 // repeatString("abc",3) -> 'abcabcabc'
 // repeatString("abc") -> 'abcabc'
 ```

snippets/round.md

@@ -6,6 +6,6 @@ Use `Math.round()` and template literals to round the number to the specified nu
 Omit the second argument, `decimals` to round to an integer.
 
 ```js
-const round = (n, decimals=0) => Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`);
+const round = (n, decimals = 0) => Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`);
 // round(1.005, 2) -> 1.01
 ```

snippets/symmetricDifference.md

@@ -8,6 +8,6 @@ Create a `Set` from each array, then use `Array.filter()` on each of them to onl
 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))];
-}
+};
 // symmetricDifference([1,2,3], [1,2,4]) -> [3,4]
 ```

snippets/toCamelCase.md

@@ -8,10 +8,10 @@ For more detailed explanation of this Regex, [visit this Site](https://regex101.
 ```js
 const toCamelCase = str => {
   let s = 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.slice(0,1).toUpperCase() + x.slice(1).toLowerCase())
+    .map(x => x.slice(0, 1).toUpperCase() + x.slice(1).toLowerCase())
     .join('');
-  return s.slice(0,1).toLowerCase() + s.slice(1)
-  }
+  return s.slice(0, 1).toLowerCase() + s.slice(1);
+};
 // toCamelCase("some_database_field_name") -> 'someDatabaseFieldName'
 // toCamelCase("Some label that needs to be camelized") -> 'someLabelThatNeedsToBeCamelized'
 // toCamelCase("some-javascript-property") -> 'someJavascriptProperty'

snippets/toDecimalMark.md

@@ -3,6 +3,6 @@
 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");
+const toDecimalMark = num => num.toLocaleString('en-US');
 // toDecimalMark(12305030388.9087) -> "12,305,030,388.9087"
 ```

snippets/toEnglishDate.md

@@ -6,7 +6,6 @@ Use `Date.toISOString()`, `split('T')` and `replace()` to convert a date from Am
 Throws an error if the passed time cannot be converted to a date.
 
 ```js
-const toEnglishDate  = (time) =>
-  {try{return new Date(time).toISOString().split('T')[0].replace(/-/g, '/')}catch(e){return}};
+const toEnglishDate = (time) => { try { return new Date(time).toISOString().split('T')[0].replace(/-/g, '/'); } catch (e) {} };
 // toEnglishDate('09/21/2010') -> '21/09/2010'
 ```

snippets/toSnakeCase.md

@@ -6,11 +6,11 @@ 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 =>{
+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("camelCase") -> 'camel_case'
 // toSnakeCase("some text") -> 'some_text'
 // toSnakeCase("some-javascript-property") -> 'some_javascript_property'

snippets/zip.md

@@ -11,8 +11,8 @@ const zip = (...arrays) => {
   const maxLength = Math.max(...arrays.map(x => x.length));
   return Array.from({length: maxLength}).map((_, i) => {
     return Array.from({length: arrays.length}, (_, k) => arrays[k][i]);
-  })
-}
-//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]]
+  });
+};
+// 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]]
 ```

snippets/zipObject.md

@@ -5,7 +5,7 @@ Given an array of valid property identifiers and an array of values, return an o
 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 ), {} )
+const zipObject = (props, values) => props.reduce((obj, prop, index) => (obj[prop] = values[index], obj), {});
 // zipObject(['a','b','c'], [1,2]) -> {a: 1, b: 2, c: undefined}
 // zipObject(['a','b'], [1,2,3]) -> {a: 1, b: 2}
 ```