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30secondsofcode
2020-03-05 21:10:09 +00:00
parent a9c58a0b95
commit 6ae9cd2fcb
13 changed files with 125 additions and 127 deletions
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49
snippet_data/snippetList.json
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@ -464,14 +464,14 @@
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125
snippet_data/snippets.json
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@ -755,11 +755,11 @@
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"text": "Returns the first non-null/undefined argument.\n\nUse `Array.prototype.find()` to return the first non `null`/`undefined` argument.\n\n", "text": "Returns the first defined, non-null argument.\n\nUse `Array.prototype.find()` and `Array.prototype.includes()` to find the first value that is not equal to `undefined` or `null`.\n\n",
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"example": "coalesce(null, undefined, '', NaN, 'Waldo'); // \"\"" "example": "coalesce(null, undefined, '', NaN, 'Waldo'); // ''"
}, },
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"utility", "utility",
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"es5": "var hammingDistance = function hammingDistance(num1, num2) {\n return ((num1 ^ num2).toString(2).match(/1/g) || '').length;\n};", "es5": "var hammingDistance = function hammingDistance(num1, num2) {\n return ((num1 ^ num2).toString(2).match(/1/g) || '').length;\n};",
@ -2916,14 +2916,15 @@
}, },
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"text": "Returns `true` if the specified value is `null` or `undefined`, `false` otherwise.\n\nUse the strict equality operator to check if the value and of `val` are equal to `null` or `undefined`.\n\n", "text": "Returns `true` if the specified value is `null` or `undefined`, `false` otherwise.\n\nUse the strict equality operator to check if the value of `val` is equal to `null` or `undefined`.\n\n",
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@ -4172,7 +4173,7 @@
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"text": "Returns `true` if the specified value is `null`, `false` otherwise.\n\nUse the strict equality operator to check if the value and of `val` are equal to `null`.\n\n", "text": "Returns `true` if the specified value is `null`, `false` otherwise.\n\nUse the strict equality operator to check if the value of `val` is equal to `null`.\n\n",
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@ -4611,7 +4612,7 @@
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"text": "Returns `true` if the specified value is `undefined`, `false` otherwise.\n\nUse the strict equality operator to check if the value and of `val` are equal to `undefined`.\n\n", "text": "Returns `true` if the specified value is `undefined`, `false` otherwise.\n\nUse the strict equality operator to check if `val` is equal to `undefined`.\n\n",
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"es5": "var isUndefined = function isUndefined(val) {\n return val === undefined;\n};", "es5": "var isUndefined = function isUndefined(val) {\n return val === undefined;\n};",
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"hash": "e8f820ce6da97eabde082ffb829c9fb700e85efc79bdebe883c67237269e3f52", "hash": "b031c3387ef66411ab5d295788eac4247ada5b4b068dda90603d3c973890bc26",
"firstSeen": "1570824965", "firstSeen": "1570824965",
"lastUpdated": "1582054301", "lastUpdated": "1582057110",
"updateCount": 39, "updateCount": 40,
"authorCount": 4 "authorCount": 4
} }
}, },
@ -6268,7 +6269,7 @@
"codeBlocks": { "codeBlocks": {
"es6": "const pipeAsyncFunctions = (...fns) => arg => fns.reduce((p, f) => p.then(f), Promise.resolve(arg));", "es6": "const pipeAsyncFunctions = (...fns) => arg => fns.reduce((p, f) => p.then(f), Promise.resolve(arg));",
"es5": "var pipeAsyncFunctions = function pipeAsyncFunctions() {\n for (var _len = arguments.length, fns = new Array(_len), _key = 0; _key < _len; _key++) {\n fns[_key] = arguments[_key];\n }\n\n return function (arg) {\n return fns.reduce(function (p, f) {\n return p.then(f);\n }, Promise.resolve(arg));\n };\n};", "es5": "var pipeAsyncFunctions = function pipeAsyncFunctions() {\n for (var _len = arguments.length, fns = new Array(_len), _key = 0; _key < _len; _key++) {\n fns[_key] = arguments[_key];\n }\n\n return function (arg) {\n return fns.reduce(function (p, f) {\n return p.then(f);\n }, Promise.resolve(arg));\n };\n};",
"example": "const sum = pipeAsyncFunctions(\n x => x + 1,\n x => new Promise(resolve => setTimeout(() => resolve(x + 2), 1000)),\n x => x + 3,\n async x => (await x) + 4\n);\n(async () => {\n console.log(await sum(5)); // 15 (after one second)\n})();" "example": "const sum = pipeAsyncFunctions(\n x => x + 1,\n x => new Promise(resolve => setTimeout(() => resolve(x + 2), 1000)),\n x => x + 3,\n async x => (await x) + 4\n);\n(async() => {\n console.log(await sum(5)); // 15 (after one second)\n})();"
}, },
"tags": [ "tags": [
"function", "function",
@ -6277,10 +6278,10 @@
] ]
}, },
"meta": { "meta": {
"hash": "a2b9ac4f1209c3791caa6f40f0d041acd75514e9ee8909f2e3833635f357c0bd", "hash": "0eb844801e767edcaa6a882a6dce4b5b1dadecb53a92d6ec259d36c57b6a3dd0",
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} }
}, },
@ -6921,10 +6922,10 @@
] ]
}, },
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"lastUpdated": "1582054301", "lastUpdated": "1582057110",
"updateCount": 93, "updateCount": 94,
"authorCount": 6 "authorCount": 6
} }
}, },
@ -7437,10 +7438,10 @@
] ]
}, },
"meta": { "meta": {
"hash": "6dd4c6a51d2c80fa4768c95ae01c16a8359c4140bcad28c7fde0cecd72d7d3e2", "hash": "24b93b68a59b49f245590930fed6fb82e286ce09f90e292466cde63c1784c347",
"firstSeen": "1514645161", "firstSeen": "1514645161",
"lastUpdated": "1582054301", "lastUpdated": "1582057110",
"updateCount": 38, "updateCount": 39,
"authorCount": 5 "authorCount": 5
} }
}, },
@ -8363,10 +8364,10 @@
] ]
}, },
"meta": { "meta": {
"hash": "ebe1997777f4fb4c97cd5ae23a0cc590a0aab8f6762ae1d39c17f27bf2efe1c6", "hash": "b893c5ab5d118c46dc7b673413adbeddd967093c36225eb31cf446c95de0ff39",
"firstSeen": "1515424366", "firstSeen": "1515424366",
"lastUpdated": "1565681352", "lastUpdated": "1583442408",
"updateCount": 3, "updateCount": 4,
"authorCount": 2 "authorCount": 2
} }
}, },

1
snippets/deepClone.md
View File

@ -11,7 +11,6 @@ Use `Object.assign()` and an empty object (`{}`) to create a shallow clone of th
Use `Object.keys()` and `Array.prototype.forEach()` to determine which key-value pairs need to be deep cloned. Use `Object.keys()` and `Array.prototype.forEach()` to determine which key-value pairs need to be deep cloned.
```js ```js
const deepClone = obj => { const deepClone = obj => {
if (obj === null) return null; if (obj === null) return null;
let clone = Object.assign({}, obj); let clone = Object.assign({}, obj);

1
snippets/deepMapKeys.md
View File

@ -10,7 +10,6 @@ Use `Object.keys(obj)` to iterate over the object's keys.
Use `Array.prototype.reduce()` to create a new object with the same values and mapped keys using `fn`. Use `Array.prototype.reduce()` to create a new object with the same values and mapped keys using `fn`.
```js ```js
const deepMapKeys = (obj, f) => const deepMapKeys = (obj, f) =>
Array.isArray(obj) Array.isArray(obj)
? obj.map(val => deepMapKeys(val, f)) ? obj.map(val => deepMapKeys(val, f))

1
snippets/dig.md
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@ -9,7 +9,6 @@ Use the `in` operator to check if `target` exists in `obj`.
If found, return the value of `obj[target]`, otherwise use `Object.values(obj)` and `Array.prototype.reduce()` to recursively call `dig` on each nested object until the first matching key/value pair is found. If found, return the value of `obj[target]`, otherwise use `Object.values(obj)` and `Array.prototype.reduce()` to recursively call `dig` on each nested object until the first matching key/value pair is found.
```js ```js
const dig = (obj, target) => const dig = (obj, target) =>
target in obj target in obj
? obj[target] ? obj[target]

1
snippets/factorial.md
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@ -11,7 +11,6 @@ Otherwise, return the product of `n` and the factorial of `n - 1`.
Throws an exception if `n` is a negative number. Throws an exception if `n` is a negative number.
```js ```js
const factorial = n => const factorial = n =>
n < 0 n < 0
? (() => { ? (() => {

1
snippets/getMeridiemSuffixOfInteger.md
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@ -8,7 +8,6 @@ Converts an integer to a suffixed string, adding `am` or `pm` based on its value
Use the modulo operator (`%`) and conditional checks to transform an integer to a stringified 12-hour format with meridiem suffix. Use the modulo operator (`%`) and conditional checks to transform an integer to a stringified 12-hour format with meridiem suffix.
```js ```js
const getMeridiemSuffixOfInteger = num => const getMeridiemSuffixOfInteger = num =>
num === 0 || num === 24 num === 0 || num === 24
? 12 + 'am' ? 12 + 'am'

1
snippets/join.md
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@ -11,6 +11,7 @@ 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. Omit the third argument, `end`, to use the same value as `separator` by default.
```js ```js
const join = (arr, separator = ',', end = separator) => const join = (arr, separator = ',', end = separator) =>
arr.reduce( arr.reduce(
(acc, val, i) => (acc, val, i) =>

1
snippets/objectToQueryString.md
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@ -10,6 +10,7 @@ Determine the `symbol` to be either `?` or `&` based on the `length` of `querySt
Return the `queryString` or an empty string when the `queryParameters` are falsy. Return the `queryString` or an empty string when the `queryParameters` are falsy.
```js ```js
const objectToQueryString = queryParameters => { const objectToQueryString = queryParameters => {
return queryParameters return queryParameters
? Object.entries(queryParameters).reduce((queryString, [key, val], index) => { ? Object.entries(queryParameters).reduce((queryString, [key, val], index) => {

3
snippets/pipeAsyncFunctions.md
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@ -14,13 +14,14 @@ const pipeAsyncFunctions = (...fns) => arg => fns.reduce((p, f) => p.then(f), Pr
``` ```
```js ```js
const sum = pipeAsyncFunctions( const sum = pipeAsyncFunctions(
x => x + 1, x => x + 1,
x => new Promise(resolve => setTimeout(() => resolve(x + 2), 1000)), x => new Promise(resolve => setTimeout(() => resolve(x + 2), 1000)),
x => x + 3, x => x + 3,
async x => (await x) + 4 async x => (await x) + 4
); );
(async () => { (async() => {
console.log(await sum(5)); // 15 (after one second) console.log(await sum(5)); // 15 (after one second)
})(); })();
``` ```

1
snippets/remove.md
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@ -9,7 +9,6 @@ Use `Array.prototype.filter()` to find array elements that return truthy values
The `func` is invoked with three arguments (`value, index, array`). The `func` is invoked with three arguments (`value, index, array`).
```js ```js
const remove = (arr, func) => const remove = (arr, func) =>
Array.isArray(arr) Array.isArray(arr)
? arr.filter(func).reduce((acc, val) => { ? arr.filter(func).reduce((acc, val) => {

1
snippets/size.md
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@ -12,6 +12,7 @@ Use `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API
Split strings into array of characters with `split('')` and return its length. Split strings into array of characters with `split('')` and return its length.
```js ```js
const size = val => const size = val =>
Array.isArray(val) Array.isArray(val)
? val.length ? val.length

4
snippets/toSafeInteger.md
View File

@ -10,9 +10,7 @@ Use `Math.round()` to convert to an integer.
```js ```js
const toSafeInteger = num => const toSafeInteger = num =>
Math.round( Math.round(Math.max(Math.min(num, Number.MAX_SAFE_INTEGER), Number.MIN_SAFE_INTEGER));
Math.max(Math.min(num, Number.MAX_SAFE_INTEGER), Number.MIN_SAFE_INTEGER)
);
``` ```
```js ```js