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30secondsofcode
2020-01-05 19:45:57 +00:00
parent c06917d054
commit 80a9ec7a2e
11 changed files with 202 additions and 81 deletions
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40
snippet_data/snippetList.json
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} }
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"type": "snippetListing",
"title": "haveSameContents",
"attributes": {
"text": "Returns `true` if two arrays contain the same elements regardless of order, `false` otherwise.\n\nUse a `for...of` loop over a `Set` created from the values of both arrays.\nUse `Array.prototype.filter()` to compare the amount of occurences of each distinct value in both arrays.\nReturn `false` if the counts do not match for any element, `true` otherwise.\n\n",
"tags": [
"array",
"intermediate"
]
},
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} }
}, },
{
"id": "isContainedIn",
"type": "snippetListing",
"title": "isContainedIn",
"attributes": {
"text": "Returns `true` if the elements of the first array are contained in the second one regardless of order, `false` otherwise.\n\nUse a `for...of` loop over a `Set` created from the first array.\nUse `Array.prototype.some()` to check if all distinct values are contained in the second array, use `Array.prototype.filter()` to compare the amount of occurences of each distinct value in both arrays.\nReturn `false` if the count of any element is greater in the first array than the second one, `true` otherwise.\n\n",
"tags": [
"array",
"intermediate"
]
},
"meta": {
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{ {
"id": "isDivisible", "id": "isDivisible",
"type": "snippetListing", "type": "snippetListing",
@ -2894,7 +2924,7 @@
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102
snippet_data/snippets.json
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@ -2518,9 +2518,9 @@
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@ -3061,6 +3061,31 @@
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} }
}, },
{
"id": "haveSameContents",
"title": "haveSameContents",
"type": "snippet",
"attributes": {
"fileName": "haveSameContents.md",
"text": "Returns `true` if two arrays contain the same elements regardless of order, `false` otherwise.\n\nUse a `for...of` loop over a `Set` created from the values of both arrays.\nUse `Array.prototype.filter()` to compare the amount of occurences of each distinct value in both arrays.\nReturn `false` if the counts do not match for any element, `true` otherwise.\n\n",
"codeBlocks": {
"es6": "const haveSameContents = (a, b) => {\n for (const v of new Set([...a, ...b]))\n if (a.filter(e => e === v).length !== b.filter(e => e === v).length) return false;\n return true;\n};",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nfunction _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread(); }\n\nfunction _nonIterableSpread() { throw new TypeError(\"Invalid attempt to spread non-iterable instance\"); }\n\nfunction _iterableToArray(iter) { if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === \"[object Arguments]\") return Array.from(iter); }\n\nfunction _arrayWithoutHoles(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } }\n\nvar haveSameContents = function haveSameContents(a, b) {\n var _iteratorNormalCompletion = true;\n var _didIteratorError = false;\n var _iteratorError = undefined;\n\n try {\n var _loop = function _loop() {\n var v = _step.value;\n if (a.filter(function (e) {\n return e === v;\n }).length !== b.filter(function (e) {\n return e === v;\n }).length) return {\n v: false\n };\n };\n\n for (var _iterator = new Set([].concat(_toConsumableArray(a), _toConsumableArray(b)))[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {\n var _ret = _loop();\n\n if (_typeof(_ret) === \"object\") return _ret.v;\n }\n } catch (err) {\n _didIteratorError = true;\n _iteratorError = err;\n } finally {\n try {\n if (!_iteratorNormalCompletion && _iterator[\"return\"] != null) {\n _iterator[\"return\"]();\n }\n } finally {\n if (_didIteratorError) {\n throw _iteratorError;\n }\n }\n }\n\n return true;\n};",
"example": "haveSameContents([1, 2, 4], [2, 4, 1]); // true"
},
"tags": [
"array",
"intermediate"
]
},
"meta": {
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"title": "head", "title": "head",
@ -3913,6 +3938,31 @@
"authorCount": 2 "authorCount": 2
} }
}, },
{
"id": "isContainedIn",
"title": "isContainedIn",
"type": "snippet",
"attributes": {
"fileName": "isContainedIn.md",
"text": "Returns `true` if the elements of the first array are contained in the second one regardless of order, `false` otherwise.\n\nUse a `for...of` loop over a `Set` created from the first array.\nUse `Array.prototype.some()` to check if all distinct values are contained in the second array, use `Array.prototype.filter()` to compare the amount of occurences of each distinct value in both arrays.\nReturn `false` if the count of any element is greater in the first array than the second one, `true` otherwise.\n\n",
"codeBlocks": {
"es6": "const isContainedIn = (a, b) => {\n for (const v of new Set(a)) {\n if (\n !b.some(e => e === v) ||\n a.filter(e => e === v).length > b.filter(e => e === v).length\n )\n return false;\n }\n return true;\n};",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isContainedIn = function isContainedIn(a, b) {\n var _iteratorNormalCompletion = true;\n var _didIteratorError = false;\n var _iteratorError = undefined;\n\n try {\n var _loop = function _loop() {\n var v = _step.value;\n if (!b.some(function (e) {\n return e === v;\n }) || a.filter(function (e) {\n return e === v;\n }).length > b.filter(function (e) {\n return e === v;\n }).length) return {\n v: false\n };\n };\n\n for (var _iterator = new Set(a)[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {\n var _ret = _loop();\n\n if (_typeof(_ret) === \"object\") return _ret.v;\n }\n } catch (err) {\n _didIteratorError = true;\n _iteratorError = err;\n } finally {\n try {\n if (!_iteratorNormalCompletion && _iterator[\"return\"] != null) {\n _iterator[\"return\"]();\n }\n } finally {\n if (_didIteratorError) {\n throw _iteratorError;\n }\n }\n }\n\n return true;\n};",
"example": "isContainedIn([1, 4], [2, 4, 1]); // true"
},
"tags": [
"array",
"intermediate"
]
},
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"id": "isDivisible", "id": "isDivisible",
"title": "isDivisible", "title": "isDivisible",
@ -4720,7 +4770,7 @@
"fileName": "join.md", "fileName": "join.md",
"text": "Joins all elements of an array into a string and returns this string.\nUses a separator and an end separator.\n\nUse `Array.prototype.reduce()` to combine elements into a string.\nOmit the second argument, `separator`, to use a default separator of `','`.\nOmit the third argument, `end`, to use the same value as `separator` by default.\n\n", "text": "Joins all elements of an array into a string and returns this string.\nUses a separator and an end separator.\n\nUse `Array.prototype.reduce()` to combine elements into a string.\nOmit the second argument, `separator`, to use a default separator of `','`.\nOmit the third argument, `end`, to use the same value as `separator` by default.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const join = (arr, separator = ',', end = separator) =>\n arr.reduce(\n (acc, val, i) =>\n i === arr.length - 2\n ? acc + val + end\n : i === arr.length - 1\n ? acc + val\n : acc + val + separator,\n ''\n );", "es6": "const join = (arr, separator = ',', end = separator) =>\n arr.reduce(\n (acc, val, i) =>\n i === arr.length - 2\n ? acc + val + end\n : i === arr.length - 1\n ? acc + val\n : acc + val + separator,\n ''\n );",
"es5": "var join = function join(arr) {\n var separator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : ',';\n var end = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : separator;\n return arr.reduce(function (acc, val, i) {\n return i === arr.length - 2 ? acc + val + end : i === arr.length - 1 ? acc + val : acc + val + separator;\n }, '');\n};", "es5": "var join = function join(arr) {\n var separator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : ',';\n var end = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : separator;\n return arr.reduce(function (acc, val, i) {\n return i === arr.length - 2 ? acc + val + end : i === arr.length - 1 ? acc + val : acc + val + separator;\n }, '');\n};",
"example": "join(['pen', 'pineapple', 'apple', 'pen'], ',', '&'); // \"pen,pineapple,apple&pen\"\njoin(['pen', 'pineapple', 'apple', 'pen'], ','); // \"pen,pineapple,apple,pen\"\njoin(['pen', 'pineapple', 'apple', 'pen']); // \"pen,pineapple,apple,pen\"" "example": "join(['pen', 'pineapple', 'apple', 'pen'], ',', '&'); // \"pen,pineapple,apple&pen\"\njoin(['pen', 'pineapple', 'apple', 'pen'], ','); // \"pen,pineapple,apple,pen\"\njoin(['pen', 'pineapple', 'apple', 'pen']); // \"pen,pineapple,apple,pen\""
}, },
@ -4730,10 +4780,10 @@
] ]
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{ {
@ -5654,7 +5704,7 @@
"fileName": "objectToQueryString.md", "fileName": "objectToQueryString.md",
"text": "Returns a query string generated from the key-value pairs of the given object.\n\nUse `Array.prototype.reduce()` on `Object.entries(queryParameters)` to create the query string.\nDetermine the `symbol` to be either `?` or `&` based on the `length` of `queryString` and concatenate `val` to `queryString` only if it's a string.\nReturn the `queryString` or an empty string when the `queryParameters` are falsy.\n\n", "text": "Returns a query string generated from the key-value pairs of the given object.\n\nUse `Array.prototype.reduce()` on `Object.entries(queryParameters)` to create the query string.\nDetermine the `symbol` to be either `?` or `&` based on the `length` of `queryString` and concatenate `val` to `queryString` only if it's a string.\nReturn the `queryString` or an empty string when the `queryParameters` are falsy.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const objectToQueryString = queryParameters => {\n return queryParameters\n ? Object.entries(queryParameters).reduce((queryString, [key, val], index) => {\n const symbol = queryString.length === 0 ? '?' : '&';\n queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';\n return queryString;\n }, '')\n : '';\n};", "es6": "const objectToQueryString = queryParameters => {\n return queryParameters\n ? Object.entries(queryParameters).reduce((queryString, [key, val], index) => {\n const symbol = queryString.length === 0 ? '?' : '&';\n queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';\n return queryString;\n }, '')\n : '';\n};",
"es5": "function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }\n\nfunction _nonIterableRest() { throw new TypeError(\"Invalid attempt to destructure non-iterable instance\"); }\n\nfunction _iterableToArrayLimit(arr, i) { if (!(Symbol.iterator in Object(arr) || Object.prototype.toString.call(arr) === \"[object Arguments]\")) { return; } 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\"] != null) _i[\"return\"](); } finally { if (_d) throw _e; } } return _arr; }\n\nfunction _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }\n\nvar objectToQueryString = function objectToQueryString(queryParameters) {\n return queryParameters ? Object.entries(queryParameters).reduce(function (queryString, _ref, index) {\n var _ref2 = _slicedToArray(_ref, 2),\n key = _ref2[0],\n val = _ref2[1];\n\n var symbol = queryString.length === 0 ? '?' : '&';\n queryString += typeof val === 'string' ? \"\".concat(symbol).concat(key, \"=\").concat(val) : '';\n return queryString;\n }, '') : '';\n};", "es5": "function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }\n\nfunction _nonIterableRest() { throw new TypeError(\"Invalid attempt to destructure non-iterable instance\"); }\n\nfunction _iterableToArrayLimit(arr, i) { if (!(Symbol.iterator in Object(arr) || Object.prototype.toString.call(arr) === \"[object Arguments]\")) { return; } 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\"] != null) _i[\"return\"](); } finally { if (_d) throw _e; } } return _arr; }\n\nfunction _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }\n\nvar objectToQueryString = function objectToQueryString(queryParameters) {\n return queryParameters ? Object.entries(queryParameters).reduce(function (queryString, _ref, index) {\n var _ref2 = _slicedToArray(_ref, 2),\n key = _ref2[0],\n val = _ref2[1];\n\n var symbol = queryString.length === 0 ? '?' : '&';\n queryString += typeof val === 'string' ? \"\".concat(symbol).concat(key, \"=\").concat(val) : '';\n return queryString;\n }, '') : '';\n};",
"example": "objectToQueryString({ page: '1', size: '2kg', key: undefined }); // '?page=1&size=2kg'" "example": "objectToQueryString({ page: '1', size: '2kg', key: undefined }); // '?page=1&size=2kg'"
}, },
@ -5666,10 +5716,10 @@
] ]
}, },
"meta": { "meta": {
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@ -6225,7 +6275,7 @@
"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": [
"adapter", "adapter",
@ -6235,10 +6285,10 @@
] ]
}, },
"meta": { "meta": {
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@ -6872,7 +6922,7 @@
"fileName": "remove.md", "fileName": "remove.md",
"text": "Removes elements from an array for which the given function returns `false`.\n\nUse `Array.prototype.filter()` to find array elements that return truthy values and `Array.prototype.reduce()` to remove elements using `Array.prototype.splice()`.\nThe `func` is invoked with three arguments (`value, index, array`).\n\n", "text": "Removes elements from an array for which the given function returns `false`.\n\nUse `Array.prototype.filter()` to find array elements that return truthy values and `Array.prototype.reduce()` to remove elements using `Array.prototype.splice()`.\nThe `func` is invoked with three arguments (`value, index, array`).\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const remove = (arr, func) =>\n Array.isArray(arr)\n ? arr.filter(func).reduce((acc, val) => {\n arr.splice(arr.indexOf(val), 1);\n return acc.concat(val);\n }, [])\n : [];", "es6": "const remove = (arr, func) =>\n Array.isArray(arr)\n ? arr.filter(func).reduce((acc, val) => {\n arr.splice(arr.indexOf(val), 1);\n return acc.concat(val);\n }, [])\n : [];",
"es5": "var remove = function remove(arr, func) {\n return Array.isArray(arr) ? arr.filter(func).reduce(function (acc, val) {\n arr.splice(arr.indexOf(val), 1);\n return acc.concat(val);\n }, []) : [];\n};", "es5": "var remove = function remove(arr, func) {\n return Array.isArray(arr) ? arr.filter(func).reduce(function (acc, val) {\n arr.splice(arr.indexOf(val), 1);\n return acc.concat(val);\n }, []) : [];\n};",
"example": "remove([1, 2, 3, 4], n => n % 2 === 0); // [2, 4]" "example": "remove([1, 2, 3, 4], n => n % 2 === 0); // [2, 4]"
}, },
@ -6882,10 +6932,10 @@
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@ -7386,7 +7436,7 @@
"fileName": "size.md", "fileName": "size.md",
"text": "Gets the size of an array, object or string.\n\nGet type of `val` (`array`, `object` or `string`). \nUse `length` property for arrays.\nUse `length` or `size` value if available or number of keys for objects.\nUse `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) created from `val` for strings.\nSplit strings into array of characters with `split('')` and return its length.\n\n", "text": "Gets the size of an array, object or string.\n\nGet type of `val` (`array`, `object` or `string`). \nUse `length` property for arrays.\nUse `length` or `size` value if available or number of keys for objects.\nUse `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) created from `val` for strings.\nSplit strings into array of characters with `split('')` and return its length.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const size = val =>\n Array.isArray(val)\n ? val.length\n : val && typeof val === 'object'\n ? val.size || val.length || Object.keys(val).length\n : typeof val === 'string'\n ? new Blob([val]).size\n : 0;", "es6": "const size = val =>\n Array.isArray(val)\n ? val.length\n : val && typeof val === 'object'\n ? val.size || val.length || Object.keys(val).length\n : typeof val === 'string'\n ? new Blob([val]).size\n : 0;",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar size = function size(val) {\n return 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;\n};", "es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar size = function size(val) {\n return 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;\n};",
"example": "size([1, 2, 3, 4, 5]); // 5\nsize('size'); // 4\nsize({ one: 1, two: 2, three: 3 }); // 3" "example": "size([1, 2, 3, 4, 5]); // 5\nsize('size'); // 4\nsize({ one: 1, two: 2, three: 3 }); // 3"
}, },
@ -7398,10 +7448,10 @@
] ]
}, },
"meta": { "meta": {
"hash": "24b93b68a59b49f245590930fed6fb82e286ce09f90e292466cde63c1784c347", "hash": "6dd4c6a51d2c80fa4768c95ae01c16a8359c4140bcad28c7fde0cecd72d7d3e2",
"firstSeen": "1514645161", "firstSeen": "1514645161",
"lastUpdated": "1577791301", "lastUpdated": "1578058637",
"updateCount": 23, "updateCount": 24,
"authorCount": 5 "authorCount": 5
} }
}, },

5
snippets/haveSameContents.md
View File

@ -12,10 +12,9 @@ Return `false` if the counts do not match for any element, `true` otherwise.
```js ```js
const haveSameContents = (a, b) => { const haveSameContents = (a, b) => {
for (const v of new Set([...a, ...b])) for (const v of new Set([...a, ...b]))
if (a.filter(e => e === v).length !== b.filter(e => e === v).length) if (a.filter(e => e === v).length !== b.filter(e => e === v).length) return false;
return false;
return true; return true;
} };
``` ```
```js ```js

8
snippets/isContainedIn.md
View File

@ -10,15 +10,17 @@ Use `Array.prototype.some()` to check if all distinct values are contained in th
Return `false` if the count of any element is greater in the first array than the second one, `true` otherwise. Return `false` if the count of any element is greater in the first array than the second one, `true` otherwise.
```js ```js
const isContainedIn = (a, b) => { const isContainedIn = (a, b) => {
for (const v of new Set(a)) for (const v of new Set(a)) {
if ( if (
!b.some(e => e === v) || !b.some(e => e === v) ||
a.filter(e => e === v).length > b.filter(e => e === v).length a.filter(e => e === v).length > b.filter(e => e === v).length
) )
return false; return false;
}
return true; return true;
} };
``` ```
```js ```js

4
snippets/join.md
View File

@ -17,8 +17,8 @@ const join = (arr, separator = ',', end = separator) =>
i === arr.length - 2 i === arr.length - 2
? acc + val + end ? acc + val + end
: i === arr.length - 1 : i === arr.length - 1
? acc + val ? acc + val
: acc + val + separator, : acc + val + separator,
'' ''
); );
``` ```

9
snippets/objectToQueryString.md
View File

@ -10,14 +10,13 @@ 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) => {
const symbol = queryString.length === 0 ? '?' : '&'; const symbol = queryString.length === 0 ? '?' : '&';
queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : ''; queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';
return queryString; return queryString;
}, '') }, '')
: ''; : '';
}; };
``` ```

3
snippets/pipeAsyncFunctions.md
View File

@ -14,14 +14,13 @@ 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)
})(); })();
``` ```

7
snippets/remove.md
View File

@ -9,12 +9,13 @@ 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) => {
arr.splice(arr.indexOf(val), 1); arr.splice(arr.indexOf(val), 1);
return acc.concat(val); return acc.concat(val);
}, []) }, [])
: []; : [];
``` ```

9
snippets/size.md
View File

@ -12,15 +12,14 @@ 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
: val && typeof val === 'object' : val && typeof val === 'object'
? val.size || val.length || Object.keys(val).length ? val.size || val.length || Object.keys(val).length
: typeof val === 'string' : typeof val === 'string'
? new Blob([val]).size ? new Blob([val]).size
: 0; : 0;
``` ```
```js ```js

43
test/_30s.js
View File

@ -481,6 +481,11 @@ const hasKey = (obj, keys) => {
}) })
); );
}; };
const haveSameContents = (a, b) => {
for (const v of new Set([...a, ...b]))
if (a.filter(e => e === v).length !== b.filter(e => e === v).length) return false;
return true;
};
const head = arr => (arr && arr.length ? arr[0] : undefined); const head = arr => (arr && arr.length ? arr[0] : undefined);
const hexToRGB = hex => { const hexToRGB = hex => {
let alpha = false, let alpha = false,
@ -583,6 +588,16 @@ const isBeforeDate = (dateA, dateB) => dateA < dateB;
const isBoolean = val => typeof val === 'boolean'; const isBoolean = val => typeof val === 'boolean';
const isBrowser = () => ![typeof window, typeof document].includes('undefined'); const isBrowser = () => ![typeof window, typeof document].includes('undefined');
const isBrowserTabFocused = () => !document.hidden; const isBrowserTabFocused = () => !document.hidden;
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
)
return false;
}
return true;
};
const isDivisible = (dividend, divisor) => dividend % divisor === 0; const isDivisible = (dividend, divisor) => dividend % divisor === 0;
const isDuplexStream = val => const isDuplexStream = val =>
val !== null && val !== null &&
@ -662,8 +677,8 @@ const join = (arr, separator = ',', end = separator) =>
i === arr.length - 2 i === arr.length - 2
? acc + val + end ? acc + val + end
: i === arr.length - 1 : i === arr.length - 1
? acc + val ? acc + val
: acc + val + separator, : acc + val + separator,
'' ''
); );
const JSONtoCSV = (arr, columns, delimiter = ',') => const JSONtoCSV = (arr, columns, delimiter = ',') =>
@ -789,10 +804,10 @@ const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]);
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) => {
const symbol = queryString.length === 0 ? '?' : '&'; const symbol = queryString.length === 0 ? '?' : '&';
queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : ''; queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';
return queryString; return queryString;
}, '') }, '')
: ''; : '';
}; };
const observeMutations = (element, callback, options) => { const observeMutations = (element, callback, options) => {
@ -1024,9 +1039,9 @@ const reject = (pred, array) => array.filter((...args) => !pred(...args));
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) => {
arr.splice(arr.indexOf(val), 1); arr.splice(arr.indexOf(val), 1);
return acc.concat(val); return acc.concat(val);
}, []) }, [])
: []; : [];
const removeNonASCII = str => str.replace(/[^\x20-\x7E]/g, ''); const removeNonASCII = str => str.replace(/[^\x20-\x7E]/g, '');
const renameKeys = (keysMap, obj) => const renameKeys = (keysMap, obj) =>
@ -1104,10 +1119,10 @@ const size = val =>
Array.isArray(val) Array.isArray(val)
? val.length ? val.length
: val && typeof val === 'object' : val && typeof val === 'object'
? val.size || val.length || Object.keys(val).length ? val.size || val.length || Object.keys(val).length
: typeof val === 'string' : typeof val === 'string'
? new Blob([val]).size ? new Blob([val]).size
: 0; : 0;
const sleep = ms => new Promise(resolve => setTimeout(resolve, ms)); const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));
const smoothScroll = element => const smoothScroll = element =>
document.querySelector(element).scrollIntoView({ document.querySelector(element).scrollIntoView({
@ -1587,4 +1602,4 @@ const speechSynthesis = message => {
const squareSum = (...args) => args.reduce((squareSum, number) => squareSum + Math.pow(number, 2), 0); const squareSum = (...args) => args.reduce((squareSum, number) => squareSum + Math.pow(number, 2), 0);
module.exports = {all,allEqual,any,approximatelyEqual,arrayToCSV,arrayToHtmlList,ary,atob,attempt,average,averageBy,bifurcate,bifurcateBy,bind,bindAll,bindKey,binomialCoefficient,bottomVisible,btoa,byteSize,call,capitalize,capitalizeEveryWord,castArray,chainAsync,checkProp,chunk,clampNumber,cloneRegExp,coalesce,coalesceFactory,collectInto,colorize,compact,compactWhitespace,compose,composeRight,converge,copyToClipboard,countBy,counter,countOccurrences,createDirIfNotExists,createElement,createEventHub,CSVToArray,CSVToJSON,currentURL,curry,dayOfYear,debounce,decapitalize,deepClone,deepFlatten,deepFreeze,deepGet,deepMapKeys,defaults,defer,degreesToRads,delay,detectDeviceType,difference,differenceBy,differenceWith,dig,digitize,distance,drop,dropRight,dropRightWhile,dropWhile,elementContains,elementIsVisibleInViewport,elo,equals,escapeHTML,escapeRegExp,everyNth,extendHex,factorial,fibonacci,filterFalsy,filterNonUnique,filterNonUniqueBy,findKey,findLast,findLastIndex,findLastKey,flatten,flattenObject,flip,forEachRight,formatDuration,formToObject,forOwn,forOwnRight,frequencies,fromCamelCase,functionName,functions,gcd,geometricProgression,get,getColonTimeFromDate,getDaysDiffBetweenDates,getImages,getMeridiemSuffixOfInteger,getScrollPosition,getStyle,getType,getURLParameters,groupBy,hammingDistance,hasClass,hasFlags,hashBrowser,hashNode,hasKey,head,hexToRGB,hide,httpGet,httpPost,httpsRedirect,hz,includesAll,includesAny,indentString,indexOfAll,initial,initialize2DArray,initializeArrayWithRange,initializeArrayWithRangeRight,initializeArrayWithValues,initializeNDArray,inRange,insertAfter,insertBefore,intersection,intersectionBy,intersectionWith,invertKeyValues,is,isAbsoluteURL,isAfterDate,isAnagram,isArrayLike,isBeforeDate,isBoolean,isBrowser,isBrowserTabFocused,isDivisible,isDuplexStream,isEmpty,isEven,isFunction,isLowerCase,isNegativeZero,isNil,isNull,isNumber,isObject,isObjectLike,isOdd,isPlainObject,isPowerOfTwo,isPrime,isPrimitive,isPromiseLike,isReadableStream,isSameDate,isSorted,isStream,isString,isSymbol,isTravisCI,isUndefined,isUpperCase,isValidJSON,isWeekday,isWeekend,isWritableStream,join,JSONtoCSV,JSONToFile,last,lcm,longestItem,lowercaseKeys,luhnCheck,mapKeys,mapNumRange,mapObject,mapString,mapValues,mask,matches,matchesWith,maxBy,maxDate,maxN,median,memoize,merge,midpoint,minBy,minDate,minN,mostFrequent,mostPerformant,negate,nest,nodeListToArray,none,nthArg,nthElement,objectFromPairs,objectToPairs,objectToQueryString,observeMutations,off,offset,omit,omitBy,on,once,onUserInputChange,orderBy,over,overArgs,pad,palindrome,parseCookie,partial,partialRight,partition,percentile,permutations,pick,pickBy,pipeAsyncFunctions,pipeFunctions,pluralize,powerset,prefix,prettyBytes,primes,promisify,pull,pullAtIndex,pullAtValue,pullBy,radsToDegrees,randomHexColorCode,randomIntArrayInRange,randomIntegerInRange,randomNumberInRange,readFileLines,rearg,recordAnimationFrames,redirect,reducedFilter,reduceSuccessive,reduceWhich,reject,remove,removeNonASCII,renameKeys,reverseString,RGBToHex,round,runAsync,runPromisesInSeries,sample,sampleSize,scrollToTop,sdbm,serializeCookie,serializeForm,setStyle,shallowClone,shank,show,shuffle,similarity,size,sleep,smoothScroll,sortCharactersInString,sortedIndex,sortedIndexBy,sortedLastIndex,sortedLastIndexBy,splitLines,spreadOver,stableSort,standardDeviation,stringPermutations,stripHTMLTags,sum,sumBy,sumPower,symmetricDifference,symmetricDifferenceBy,symmetricDifferenceWith,tail,take,takeRight,takeRightWhile,takeWhile,throttle,times,timeTaken,toCamelCase,toCurrency,toDecimalMark,toggleClass,toHash,toKebabCase,tomorrow,toOrdinalSuffix,toSafeInteger,toSnakeCase,toTitleCase,transform,triggerEvent,truncateString,truthCheckCollection,unary,uncurry,unescapeHTML,unflattenObject,unfold,union,unionBy,unionWith,uniqueElements,uniqueElementsBy,uniqueElementsByRight,uniqueSymmetricDifference,untildify,unzip,unzipWith,URLJoin,UUIDGeneratorBrowser,UUIDGeneratorNode,validateNumber,vectorDistance,weightedSample,when,without,words,xProd,yesNo,yesterday,zip,zipObject,zipWith,binarySearch,celsiusToFahrenheit,cleanObj,collatz,countVowels,factors,fahrenheitToCelsius,fibonacciCountUntilNum,fibonacciUntilNum,heronArea,howManyTimes,httpDelete,httpPut,isArmstrongNumber,isSimilar,JSONToDate,kmphToMph,levenshteinDistance,mphToKmph,pipeLog,quickSort,removeVowels,solveRPN,speechSynthesis,squareSum} module.exports = {all,allEqual,any,approximatelyEqual,arrayToCSV,arrayToHtmlList,ary,atob,attempt,average,averageBy,bifurcate,bifurcateBy,bind,bindAll,bindKey,binomialCoefficient,bottomVisible,btoa,byteSize,call,capitalize,capitalizeEveryWord,castArray,chainAsync,checkProp,chunk,clampNumber,cloneRegExp,coalesce,coalesceFactory,collectInto,colorize,compact,compactWhitespace,compose,composeRight,converge,copyToClipboard,countBy,counter,countOccurrences,createDirIfNotExists,createElement,createEventHub,CSVToArray,CSVToJSON,currentURL,curry,dayOfYear,debounce,decapitalize,deepClone,deepFlatten,deepFreeze,deepGet,deepMapKeys,defaults,defer,degreesToRads,delay,detectDeviceType,difference,differenceBy,differenceWith,dig,digitize,distance,drop,dropRight,dropRightWhile,dropWhile,elementContains,elementIsVisibleInViewport,elo,equals,escapeHTML,escapeRegExp,everyNth,extendHex,factorial,fibonacci,filterFalsy,filterNonUnique,filterNonUniqueBy,findKey,findLast,findLastIndex,findLastKey,flatten,flattenObject,flip,forEachRight,formatDuration,formToObject,forOwn,forOwnRight,frequencies,fromCamelCase,functionName,functions,gcd,geometricProgression,get,getColonTimeFromDate,getDaysDiffBetweenDates,getImages,getMeridiemSuffixOfInteger,getScrollPosition,getStyle,getType,getURLParameters,groupBy,hammingDistance,hasClass,hasFlags,hashBrowser,hashNode,hasKey,haveSameContents,head,hexToRGB,hide,httpGet,httpPost,httpsRedirect,hz,includesAll,includesAny,indentString,indexOfAll,initial,initialize2DArray,initializeArrayWithRange,initializeArrayWithRangeRight,initializeArrayWithValues,initializeNDArray,inRange,insertAfter,insertBefore,intersection,intersectionBy,intersectionWith,invertKeyValues,is,isAbsoluteURL,isAfterDate,isAnagram,isArrayLike,isBeforeDate,isBoolean,isBrowser,isBrowserTabFocused,isContainedIn,isDivisible,isDuplexStream,isEmpty,isEven,isFunction,isLowerCase,isNegativeZero,isNil,isNull,isNumber,isObject,isObjectLike,isOdd,isPlainObject,isPowerOfTwo,isPrime,isPrimitive,isPromiseLike,isReadableStream,isSameDate,isSorted,isStream,isString,isSymbol,isTravisCI,isUndefined,isUpperCase,isValidJSON,isWeekday,isWeekend,isWritableStream,join,JSONtoCSV,JSONToFile,last,lcm,longestItem,lowercaseKeys,luhnCheck,mapKeys,mapNumRange,mapObject,mapString,mapValues,mask,matches,matchesWith,maxBy,maxDate,maxN,median,memoize,merge,midpoint,minBy,minDate,minN,mostFrequent,mostPerformant,negate,nest,nodeListToArray,none,nthArg,nthElement,objectFromPairs,objectToPairs,objectToQueryString,observeMutations,off,offset,omit,omitBy,on,once,onUserInputChange,orderBy,over,overArgs,pad,palindrome,parseCookie,partial,partialRight,partition,percentile,permutations,pick,pickBy,pipeAsyncFunctions,pipeFunctions,pluralize,powerset,prefix,prettyBytes,primes,promisify,pull,pullAtIndex,pullAtValue,pullBy,radsToDegrees,randomHexColorCode,randomIntArrayInRange,randomIntegerInRange,randomNumberInRange,readFileLines,rearg,recordAnimationFrames,redirect,reducedFilter,reduceSuccessive,reduceWhich,reject,remove,removeNonASCII,renameKeys,reverseString,RGBToHex,round,runAsync,runPromisesInSeries,sample,sampleSize,scrollToTop,sdbm,serializeCookie,serializeForm,setStyle,shallowClone,shank,show,shuffle,similarity,size,sleep,smoothScroll,sortCharactersInString,sortedIndex,sortedIndexBy,sortedLastIndex,sortedLastIndexBy,splitLines,spreadOver,stableSort,standardDeviation,stringPermutations,stripHTMLTags,sum,sumBy,sumPower,symmetricDifference,symmetricDifferenceBy,symmetricDifferenceWith,tail,take,takeRight,takeRightWhile,takeWhile,throttle,times,timeTaken,toCamelCase,toCurrency,toDecimalMark,toggleClass,toHash,toKebabCase,tomorrow,toOrdinalSuffix,toSafeInteger,toSnakeCase,toTitleCase,transform,triggerEvent,truncateString,truthCheckCollection,unary,uncurry,unescapeHTML,unflattenObject,unfold,union,unionBy,unionWith,uniqueElements,uniqueElementsBy,uniqueElementsByRight,uniqueSymmetricDifference,untildify,unzip,unzipWith,URLJoin,UUIDGeneratorBrowser,UUIDGeneratorNode,validateNumber,vectorDistance,weightedSample,when,without,words,xProd,yesNo,yesterday,zip,zipObject,zipWith,binarySearch,celsiusToFahrenheit,cleanObj,collatz,countVowels,factors,fahrenheitToCelsius,fibonacciCountUntilNum,fibonacciUntilNum,heronArea,howManyTimes,httpDelete,httpPut,isArmstrongNumber,isSimilar,JSONToDate,kmphToMph,levenshteinDistance,mphToKmph,pipeLog,quickSort,removeVowels,solveRPN,speechSynthesis,squareSum}

53
vscode_snippets/snippets.json
View File

@ -1193,6 +1193,17 @@
], ],
"description": "Returns `true` if the target value exists in a JSON object, `false` otherwise.\n\nCheck if `keys` is non-empty and use `Array.prototype.every()` to sequentially check its keys to internal depth of the object, `obj`. \nUse `Object.prototype.hasOwnProperty()` to check if `obj` does not have the current key or is not an object, stop propagation and return `false`.\nOtherwise assign the key's value to `obj` to use on the next iteration.\nReturn `false` beforehand if given key list is empty.\n" "description": "Returns `true` if the target value exists in a JSON object, `false` otherwise.\n\nCheck if `keys` is non-empty and use `Array.prototype.every()` to sequentially check its keys to internal depth of the object, `obj`. \nUse `Object.prototype.hasOwnProperty()` to check if `obj` does not have the current key or is not an object, stop propagation and return `false`.\nOtherwise assign the key's value to `obj` to use on the next iteration.\nReturn `false` beforehand if given key list is empty.\n"
}, },
"haveSameContents": {
"prefix": "30s_haveSameContents",
"body": [
"const haveSameContents = (a, b) => {",
" for (const v of new Set([...a, ...b]))",
" if (a.filter(e => e === v).length !== b.filter(e => e === v).length) return false;",
" return true;",
"};"
],
"description": "Returns `true` if two arrays contain the same elements regardless of order, `false` otherwise.\n\nUse a `for...of` loop over a `Set` created from the values of both arrays.\nUse `Array.prototype.filter()` to compare the amount of occurences of each distinct value in both arrays.\nReturn `false` if the counts do not match for any element, `true` otherwise.\n"
},
"head": { "head": {
"prefix": "30s_head", "prefix": "30s_head",
"body": [ "body": [
@ -1493,6 +1504,22 @@
], ],
"description": "Returns `true` if the browser tab of the page is focused, `false` otherwise.\n\nUse the `Document.hidden` property, introduced by the Page Visibility API to check if the browser tab of the page is visible or hidden.\n" "description": "Returns `true` if the browser tab of the page is focused, `false` otherwise.\n\nUse the `Document.hidden` property, introduced by the Page Visibility API to check if the browser tab of the page is visible or hidden.\n"
}, },
"isContainedIn": {
"prefix": "30s_isContainedIn",
"body": [
"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",
" )",
" return false;",
" }",
" return true;",
"};"
],
"description": "Returns `true` if the elements of the first array are contained in the second one regardless of order, `false` otherwise.\n\nUse a `for...of` loop over a `Set` created from the first array.\nUse `Array.prototype.some()` to check if all distinct values are contained in the second array, use `Array.prototype.filter()` to compare the amount of occurences of each distinct value in both arrays.\nReturn `false` if the count of any element is greater in the first array than the second one, `true` otherwise.\n"
},
"isDivisible": { "isDivisible": {
"prefix": "30s_isDivisible", "prefix": "30s_isDivisible",
"body": [ "body": [
@ -1761,8 +1788,8 @@
" i === arr.length - 2", " i === arr.length - 2",
" ? acc + val + end", " ? acc + val + end",
" : i === arr.length - 1", " : i === arr.length - 1",
" ? acc + val", " ? acc + val",
" : acc + val + separator,", " : acc + val + separator,",
" ''", " ''",
" );" " );"
], ],
@ -2104,10 +2131,10 @@
"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) => {",
" const symbol = queryString.length === 0 ? '?' : '&';", " const symbol = queryString.length === 0 ? '?' : '&';",
" queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';", " queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';",
" return queryString;", " return queryString;",
" }, '')", " }, '')",
" : '';", " : '';",
"};" "};"
], ],
@ -2621,9 +2648,9 @@
"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) => {",
" arr.splice(arr.indexOf(val), 1);", " arr.splice(arr.indexOf(val), 1);",
" return acc.concat(val);", " return acc.concat(val);",
" }, [])", " }, [])",
" : [];" " : [];"
], ],
"description": "Removes elements from an array for which the given function returns `false`.\n\nUse `Array.prototype.filter()` to find array elements that return truthy values and `Array.prototype.reduce()` to remove elements using `Array.prototype.splice()`.\nThe `func` is invoked with three arguments (`value, index, array`).\n" "description": "Removes elements from an array for which the given function returns `false`.\n\nUse `Array.prototype.filter()` to find array elements that return truthy values and `Array.prototype.reduce()` to remove elements using `Array.prototype.splice()`.\nThe `func` is invoked with three arguments (`value, index, array`).\n"
@ -2821,10 +2848,10 @@
" Array.isArray(val)", " Array.isArray(val)",
" ? val.length", " ? val.length",
" : val && typeof val === 'object'", " : val && typeof val === 'object'",
" ? val.size || val.length || Object.keys(val).length", " ? val.size || val.length || Object.keys(val).length",
" : typeof val === 'string'", " : typeof val === 'string'",
" ? new Blob([val]).size", " ? new Blob([val]).size",
" : 0;" " : 0;"
], ],
"description": "Gets the size of an array, object or string.\n\nGet type of `val` (`array`, `object` or `string`). \nUse `length` property for arrays.\nUse `length` or `size` value if available or number of keys for objects.\nUse `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) created from `val` for strings.\nSplit strings into array of characters with `split('')` and return its length.\n" "description": "Gets the size of an array, object or string.\n\nGet type of `val` (`array`, `object` or `string`). \nUse `length` property for arrays.\nUse `length` or `size` value if available or number of keys for objects.\nUse `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) created from `val` for strings.\nSplit strings into array of characters with `split('')` and return its length.\n"
}, },