diff --git a/snippet_data/snippetList.json b/snippet_data/snippetList.json index 75266aee1..06354e7a3 100644 --- a/snippet_data/snippetList.json +++ b/snippet_data/snippetList.json @@ -1528,6 +1528,21 @@ "hash": "8810b76dac2c4294a0a029e697441ad73aa87f98a7b1698a61f31c62d5981ec8" } }, + { + "id": "frequencies", + "type": "snippetListing", + "title": "frequencies", + "attributes": { + "text": "Returns an object with the unique values of an array as keys and their frequencies as the values.\n\nUse `Array.prototype.reduce()` to map unique values to an object's keys, adding to existing keys every time the same value is encountered.\n\n", + "tags": [ + "array", + "intermediate" + ] + }, + "meta": { + "hash": "227fc1043f5a7850c32f4ecce686a97de0b8badf4d487462a1c25e8312465124" + } + }, { "id": "fromCamelCase", "type": "snippetListing", @@ -2879,7 +2894,7 @@ ] }, "meta": { - "hash": "3db3faac666ee61ab86c70766d2ab5d1293ffd818da87edb971bfff7a366364a" + "hash": "682a6b7cfeb58efe9ed7b6daf467c45397df0acecfc21cab59e5ffedd03503ba" } }, { @@ -3286,6 +3301,21 @@ "hash": "65bcfbbf3937f35f591285306ec3bfbee46a1738a6a8f097c99bf07150aec198" } }, + { + "id": "mostFrequent", + "type": "snippetListing", + "title": "mostFrequent", + "attributes": { + "text": "Returns the most frequent element in an array.\n\nUse `Array.prototype.reduce()` to map unique values to an object's keys, adding to existing keys every time the same value is encountered.\nUse `Object.entries()` on the result in combination with `Array.prototype.reduce()` to get the most frequent value in the array.\n\n", + "tags": [ + "array", + "intermediate" + ] + }, + "meta": { + "hash": "0c04c74cdbb51195f740a163776cb5c4e21a57a59099a1740211cf0764c6c9cc" + } + }, { "id": "mostPerformant", "type": "snippetListing", @@ -3440,7 +3470,7 @@ ] }, "meta": { - "hash": "e8f820ce6da97eabde082ffb829c9fb700e85efc79bdebe883c67237269e3f52" + "hash": "b031c3387ef66411ab5d295788eac4247ada5b4b068dda90603d3c973890bc26" } }, { @@ -3789,7 +3819,7 @@ ] }, "meta": { - "hash": "7ccbf66d8d55c60bcf12baa980cf32d67a4ba567894d59e2d798c9af792424ff" + "hash": "17bcf3f13980b7f804d9f0fe274324b2a35ab7d479c03d77322dabba81e1a34a" } }, { @@ -4186,7 +4216,7 @@ ] }, "meta": { - "hash": "c1542907e6295eb81df918174c247a65d73c8daccc56769f2eb32d609b7846fc" + "hash": "069472d018c3102412dafc2ae8ec6e9396e53c01d0073079f2e3f1ac3c99b6e9" } }, { @@ -4502,7 +4532,7 @@ ] }, "meta": { - "hash": "6dd4c6a51d2c80fa4768c95ae01c16a8359c4140bcad28c7fde0cecd72d7d3e2" + "hash": "24b93b68a59b49f245590930fed6fb82e286ce09f90e292466cde63c1784c347" } }, { diff --git a/snippet_data/snippets.json b/snippet_data/snippets.json index 3537ced10..150a77fce 100644 --- a/snippet_data/snippets.json +++ b/snippet_data/snippets.json @@ -1695,8 +1695,8 @@ "meta": { "hash": "bdc202436bee09f06a353d31841c6cfff33e8efead34c6c56ae1a1413284976d", "firstSeen": "1531080384", - "lastUpdated": "1577785478", - "updateCount": 90, + "lastUpdated": "1577791301", + "updateCount": 91, "authorCount": 5 } }, @@ -2081,8 +2081,8 @@ "meta": { "hash": "6e9710c9117f500e74e65c0ee36b39fb80bd55537fa5ff9c4b1136b2667096f2", "firstSeen": "1512650493", - "lastUpdated": "1577785478", - "updateCount": 95, + "lastUpdated": "1577791301", + "updateCount": 96, "authorCount": 6 } }, @@ -2498,6 +2498,31 @@ "authorCount": 4 } }, + { + "id": "frequencies", + "title": "frequencies", + "type": "snippet", + "attributes": { + "fileName": "frequencies.md", + "text": "Returns an object with the unique values of an array as keys and their frequencies as the values.\n\nUse `Array.prototype.reduce()` to map unique values to an object's keys, adding to existing keys every time the same value is encountered.\n\n", + "codeBlocks": { + "es6": "const frequencies = arr =>\n arr.reduce((a, v) => {\n a[v] = a[v] ? a[v] + 1 : 1;\n return a;\n }, {});", + "es5": "var frequencies = function frequencies(arr) {\n return arr.reduce(function (a, v) {\n a[v] = a[v] ? a[v] + 1 : 1;\n return a;\n }, {});\n};", + "example": "frequencies(['a', 'b', 'a', 'c', 'a', 'a', 'b']); // { a: 4, b: 2, c: 1 }" + }, + "tags": [ + "array", + "intermediate" + ] + }, + "meta": { + "hash": "227fc1043f5a7850c32f4ecce686a97de0b8badf4d487462a1c25e8312465124", + "firstSeen": "1578058355", + "lastUpdated": "1578058355", + "updateCount": 2, + "authorCount": 2 + } + }, { "id": "fromCamelCase", "title": "fromCamelCase", @@ -2746,8 +2771,8 @@ "meta": { "hash": "f9e6687cc28cd80e68f7a6776f893c7478aaa942710e0eb7144f105eba574a54", "firstSeen": "1515856488", - "lastUpdated": "1577785478", - "updateCount": 52, + "lastUpdated": "1577791301", + "updateCount": 53, "authorCount": 4 } }, @@ -4269,9 +4294,9 @@ "meta": { "hash": "93dcd24b208880ba16d9aa32e59e718187cb4178cadb5876a4bc7c588ddcdebd", "firstSeen": "1577791032", - "lastUpdated": "1577791032", - "updateCount": 2, - "authorCount": 2 + "lastUpdated": "1577791301", + "updateCount": 3, + "authorCount": 3 } }, { @@ -4695,7 +4720,7 @@ "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", "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};", "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\"" }, @@ -4705,10 +4730,10 @@ ] }, "meta": { - "hash": "3db3faac666ee61ab86c70766d2ab5d1293ffd818da87edb971bfff7a366364a", + "hash": "682a6b7cfeb58efe9ed7b6daf467c45397df0acecfc21cab59e5ffedd03503ba", "firstSeen": "1514801920", - "lastUpdated": "1577431401", - "updateCount": 56, + "lastUpdated": "1577791301", + "updateCount": 57, "authorCount": 7 } }, @@ -5366,6 +5391,31 @@ "authorCount": 5 } }, + { + "id": "mostFrequent", + "title": "mostFrequent", + "type": "snippet", + "attributes": { + "fileName": "mostFrequent.md", + "text": "Returns the most frequent element in an array.\n\nUse `Array.prototype.reduce()` to map unique values to an object's keys, adding to existing keys every time the same value is encountered.\nUse `Object.entries()` on the result in combination with `Array.prototype.reduce()` to get the most frequent value in the array.\n\n", + "codeBlocks": { + "es6": "const mostFrequent = arr =>\n Object.entries(\n arr.reduce((a, v) => {\n a[v] = a[v] ? a[v] + 1 : 1;\n return a;\n }, {})\n ).reduce((a, v) => (v[1] >= a[1] ? v : a), [null, 0])[0];", + "es5": "var mostFrequent = function mostFrequent(arr) {\n return Object.entries(arr.reduce(function (a, v) {\n a[v] = a[v] ? a[v] + 1 : 1;\n return a;\n }, {})).reduce(function (a, v) {\n return v[1] >= a[1] ? v : a;\n }, [null, 0])[0];\n};", + "example": "mostFrequent(['a', 'b', 'a', 'c', 'a', 'a', 'b']); // 'a'" + }, + "tags": [ + "array", + "intermediate" + ] + }, + "meta": { + "hash": "0c04c74cdbb51195f740a163776cb5c4e21a57a59099a1740211cf0764c6c9cc", + "firstSeen": "1578058366", + "lastUpdated": "1578058366", + "updateCount": 2, + "authorCount": 2 + } + }, { "id": "mostPerformant", "title": "mostPerformant", @@ -5604,7 +5654,7 @@ "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", "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};", "example": "objectToQueryString({ page: '1', size: '2kg', key: undefined }); // '?page=1&size=2kg'" }, @@ -5616,10 +5666,10 @@ ] }, "meta": { - "hash": "e8f820ce6da97eabde082ffb829c9fb700e85efc79bdebe883c67237269e3f52", + "hash": "b031c3387ef66411ab5d295788eac4247ada5b4b068dda90603d3c973890bc26", "firstSeen": "1570824965", - "lastUpdated": "1577431401", - "updateCount": 23, + "lastUpdated": "1577791301", + "updateCount": 24, "authorCount": 4 } }, @@ -6175,7 +6225,7 @@ "codeBlocks": { "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};", - "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": [ "adapter", @@ -6185,10 +6235,10 @@ ] }, "meta": { - "hash": "7ccbf66d8d55c60bcf12baa980cf32d67a4ba567894d59e2d798c9af792424ff", + "hash": "17bcf3f13980b7f804d9f0fe274324b2a35ab7d479c03d77322dabba81e1a34a", "firstSeen": "1517069864", - "lastUpdated": "1577431401", - "updateCount": 80, + "lastUpdated": "1577791301", + "updateCount": 81, "authorCount": 5 } }, @@ -6822,7 +6872,7 @@ "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", "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};", "example": "remove([1, 2, 3, 4], n => n % 2 === 0); // [2, 4]" }, @@ -6832,10 +6882,10 @@ ] }, "meta": { - "hash": "c1542907e6295eb81df918174c247a65d73c8daccc56769f2eb32d609b7846fc", + "hash": "069472d018c3102412dafc2ae8ec6e9396e53c01d0073079f2e3f1ac3c99b6e9", "firstSeen": "1513521691", - "lastUpdated": "1577431401", - "updateCount": 77, + "lastUpdated": "1577791301", + "updateCount": 78, "authorCount": 6 } }, @@ -7336,7 +7386,7 @@ "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", "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};", "example": "size([1, 2, 3, 4, 5]); // 5\nsize('size'); // 4\nsize({ one: 1, two: 2, three: 3 }); // 3" }, @@ -7348,10 +7398,10 @@ ] }, "meta": { - "hash": "6dd4c6a51d2c80fa4768c95ae01c16a8359c4140bcad28c7fde0cecd72d7d3e2", + "hash": "24b93b68a59b49f245590930fed6fb82e286ce09f90e292466cde63c1784c347", "firstSeen": "1514645161", - "lastUpdated": "1577431401", - "updateCount": 22, + "lastUpdated": "1577791301", + "updateCount": 23, "authorCount": 5 } }, diff --git a/snippets/frequencies.md b/snippets/frequencies.md index 03b0918ec..4cc49d706 100644 --- a/snippets/frequencies.md +++ b/snippets/frequencies.md @@ -9,12 +9,10 @@ Use `Array.prototype.reduce()` to map unique values to an object's keys, adding ```js const frequencies = arr => - arr.reduce( - (a, v) => { - a[v] = a[v] ? a[v] + 1 : 1; - return a; - }, {} - ); + arr.reduce((a, v) => { + a[v] = a[v] ? a[v] + 1 : 1; + return a; + }, {}); ``` ```js diff --git a/snippets/join.md b/snippets/join.md index 6df3c9145..89d1f7a72 100644 --- a/snippets/join.md +++ b/snippets/join.md @@ -17,8 +17,8 @@ const join = (arr, separator = ',', end = separator) => i === arr.length - 2 ? acc + val + end : i === arr.length - 1 - ? acc + val - : acc + val + separator, + ? acc + val + : acc + val + separator, '' ); ``` diff --git a/snippets/mostFrequent.md b/snippets/mostFrequent.md index 3d2d08876..ba4c36dfe 100644 --- a/snippets/mostFrequent.md +++ b/snippets/mostFrequent.md @@ -10,12 +10,12 @@ Use `Object.entries()` on the result in combination with `Array.prototype.reduce ```js const mostFrequent = arr => - Object.entries(arr.reduce( - (a, v) => { + Object.entries( + arr.reduce((a, v) => { a[v] = a[v] ? a[v] + 1 : 1; return a; - }, {} - )).reduce((a, v) => v[1] >= a[1] ? v : a, [null, 0])[0]; + }, {}) + ).reduce((a, v) => (v[1] >= a[1] ? v : a), [null, 0])[0]; ``` ```js diff --git a/snippets/objectToQueryString.md b/snippets/objectToQueryString.md index e83fdddce..0b63cd94f 100644 --- a/snippets/objectToQueryString.md +++ b/snippets/objectToQueryString.md @@ -10,13 +10,14 @@ 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. ```js + const objectToQueryString = queryParameters => { return queryParameters ? Object.entries(queryParameters).reduce((queryString, [key, val], index) => { - const symbol = queryString.length === 0 ? '?' : '&'; - queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : ''; - return queryString; - }, '') + const symbol = queryString.length === 0 ? '?' : '&'; + queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : ''; + return queryString; + }, '') : ''; }; ``` diff --git a/snippets/pipeAsyncFunctions.md b/snippets/pipeAsyncFunctions.md index 4904b600a..31bbfbd21 100644 --- a/snippets/pipeAsyncFunctions.md +++ b/snippets/pipeAsyncFunctions.md @@ -14,13 +14,14 @@ const pipeAsyncFunctions = (...fns) => arg => fns.reduce((p, f) => p.then(f), Pr ``` ```js + const sum = pipeAsyncFunctions( x => x + 1, x => new Promise(resolve => setTimeout(() => resolve(x + 2), 1000)), x => x + 3, async x => (await x) + 4 ); -(async () => { +(async() => { console.log(await sum(5)); // 15 (after one second) })(); ``` \ No newline at end of file diff --git a/snippets/remove.md b/snippets/remove.md index c9f127afb..1b3b066a1 100644 --- a/snippets/remove.md +++ b/snippets/remove.md @@ -9,13 +9,12 @@ Use `Array.prototype.filter()` to find array elements that return truthy values The `func` is invoked with three arguments (`value, index, array`). ```js - const remove = (arr, func) => Array.isArray(arr) ? arr.filter(func).reduce((acc, val) => { - arr.splice(arr.indexOf(val), 1); - return acc.concat(val); - }, []) + arr.splice(arr.indexOf(val), 1); + return acc.concat(val); + }, []) : []; ``` diff --git a/snippets/size.md b/snippets/size.md index b940a8ea5..c658adcb7 100644 --- a/snippets/size.md +++ b/snippets/size.md @@ -12,14 +12,15 @@ 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. ```js + const size = val => Array.isArray(val) ? val.length : val && typeof val === 'object' - ? val.size || val.length || Object.keys(val).length - : typeof val === 'string' - ? new Blob([val]).size - : 0; + ? val.size || val.length || Object.keys(val).length + : typeof val === 'string' + ? new Blob([val]).size + : 0; ``` ```js diff --git a/test/_30s.js b/test/_30s.js index 8d5dd7705..7bf9a22ba 100644 --- a/test/_30s.js +++ b/test/_30s.js @@ -381,6 +381,11 @@ const forOwnRight = (obj, fn) => Object.keys(obj) .reverse() .forEach(key => fn(obj[key], key, obj)); +const frequencies = arr => + arr.reduce((a, v) => { + a[v] = a[v] ? a[v] + 1 : 1; + return a; + }, {}); const fromCamelCase = (str, separator = '_') => str .replace(/([a-z\d])([A-Z])/g, '$1' + separator + '$2') @@ -657,8 +662,8 @@ const join = (arr, separator = ',', end = separator) => i === arr.length - 2 ? acc + val + end : i === arr.length - 1 - ? acc + val - : acc + val + separator, + ? acc + val + : acc + val + separator, '' ); const JSONtoCSV = (arr, columns, delimiter = ',') => @@ -755,6 +760,13 @@ const midpoint = ([x1, y1], [x2, y2]) => [(x1 + x2) / 2, (y1 + y2) / 2]; const minBy = (arr, fn) => Math.min(...arr.map(typeof fn === 'function' ? fn : val => val[fn])); const minDate = dates => new Date(Math.min(...dates)); const minN = (arr, n = 1) => [...arr].sort((a, b) => a - b).slice(0, n); +const mostFrequent = arr => + Object.entries( + arr.reduce((a, v) => { + a[v] = a[v] ? a[v] + 1 : 1; + return a; + }, {}) + ).reduce((a, v) => (v[1] >= a[1] ? v : a), [null, 0])[0]; const mostPerformant = (fns, iterations = 10000) => { const times = fns.map(fn => { const before = performance.now(); @@ -777,10 +789,10 @@ const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]); const objectToQueryString = queryParameters => { return queryParameters ? Object.entries(queryParameters).reduce((queryString, [key, val], index) => { - const symbol = queryString.length === 0 ? '?' : '&'; - queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : ''; - return queryString; - }, '') + const symbol = queryString.length === 0 ? '?' : '&'; + queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : ''; + return queryString; + }, '') : ''; }; const observeMutations = (element, callback, options) => { @@ -1012,9 +1024,9 @@ const reject = (pred, array) => array.filter((...args) => !pred(...args)); const remove = (arr, func) => Array.isArray(arr) ? arr.filter(func).reduce((acc, val) => { - arr.splice(arr.indexOf(val), 1); - return acc.concat(val); - }, []) + arr.splice(arr.indexOf(val), 1); + return acc.concat(val); + }, []) : []; const removeNonASCII = str => str.replace(/[^\x20-\x7E]/g, ''); const renameKeys = (keysMap, obj) => @@ -1092,10 +1104,10 @@ const size = val => Array.isArray(val) ? val.length : val && typeof val === 'object' - ? val.size || val.length || Object.keys(val).length - : typeof val === 'string' - ? new Blob([val]).size - : 0; + ? val.size || val.length || Object.keys(val).length + : typeof val === 'string' + ? new Blob([val]).size + : 0; const sleep = ms => new Promise(resolve => setTimeout(resolve, ms)); const smoothScroll = element => document.querySelector(element).scrollIntoView({ @@ -1575,4 +1587,4 @@ const speechSynthesis = message => { 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,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,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} \ No newline at end of file +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} \ No newline at end of file diff --git a/vscode_snippets/snippets.json b/vscode_snippets/snippets.json index 400638b70..5a24c3ab5 100644 --- a/vscode_snippets/snippets.json +++ b/vscode_snippets/snippets.json @@ -961,6 +961,17 @@ ], "description": "Iterates over all own properties of an object in reverse, running a callback for each one.\n\nUse `Object.keys(obj)` to get all the properties of the object, `Array.prototype.reverse()` to reverse their order and `Array.prototype.forEach()` to run the provided function for each key-value pair. The callback receives three arguments - the value, the key and the object.\n" }, + "frequencies": { + "prefix": "30s_frequencies", + "body": [ + "const frequencies = arr =>", + " arr.reduce((a, v) => {", + " a[v] = a[v] ? a[v] + 1 : 1;", + " return a;", + " }, {});" + ], + "description": "Returns an object with the unique values of an array as keys and their frequencies as the values.\n\nUse `Array.prototype.reduce()` to map unique values to an object's keys, adding to existing keys every time the same value is encountered.\n" + }, "fromCamelCase": { "prefix": "30s_fromCamelCase", "body": [ @@ -1750,8 +1761,8 @@ " i === arr.length - 2", " ? acc + val + end", " : i === arr.length - 1", - " ? acc + val", - " : acc + val + separator,", + " ? acc + val", + " : acc + val + separator,", " ''", " );" ], @@ -2001,6 +2012,19 @@ ], "description": "Returns the `n` minimum elements from the provided array.\nIf `n` is greater than or equal to the provided array's length, then return the original array (sorted in ascending order).\n\nUse `Array.prototype.sort()` combined with the spread operator (`...`) to create a shallow clone of the array and sort it in ascending order.\nUse `Array.prototype.slice()` to get the specified number of elements.\nOmit the second argument, `n`, to get a one-element array.\n" }, + "mostFrequent": { + "prefix": "30s_mostFrequent", + "body": [ + "const mostFrequent = arr =>", + " Object.entries(", + " arr.reduce((a, v) => {", + " a[v] = a[v] ? a[v] + 1 : 1;", + " return a;", + " }, {})", + " ).reduce((a, v) => (v[1] >= a[1] ? v : a), [null, 0])[0];" + ], + "description": "Returns the most frequent element in an array.\n\nUse `Array.prototype.reduce()` to map unique values to an object's keys, adding to existing keys every time the same value is encountered.\nUse `Object.entries()` on the result in combination with `Array.prototype.reduce()` to get the most frequent value in the array.\n" + }, "mostPerformant": { "prefix": "30s_mostPerformant", "body": [ @@ -2080,10 +2104,10 @@ "const objectToQueryString = queryParameters => {", " return queryParameters", " ? Object.entries(queryParameters).reduce((queryString, [key, val], index) => {", - " const symbol = queryString.length === 0 ? '?' : '&';", - " queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';", - " return queryString;", - " }, '')", + " const symbol = queryString.length === 0 ? '?' : '&';", + " queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';", + " return queryString;", + " }, '')", " : '';", "};" ], @@ -2597,9 +2621,9 @@ "const remove = (arr, func) =>", " Array.isArray(arr)", " ? arr.filter(func).reduce((acc, val) => {", - " arr.splice(arr.indexOf(val), 1);", - " return acc.concat(val);", - " }, [])", + " arr.splice(arr.indexOf(val), 1);", + " 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" @@ -2797,10 +2821,10 @@ " 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;" + " ? val.size || val.length || Object.keys(val).length", + " : typeof val === 'string'", + " ? new Blob([val]).size", + " : 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" },