Marcello di Simone MarcelloDiSimone
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| const variance = (n) => (l = n.length, n.reduce((a, b) => a + ((b - (n.reduce((a, b) => a + b, 0) / l)) ** 2), 0) / l); |
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| function rot13(message){ | |
| return [...message].map((c) => (n = c.charCodeAt(0),String.fromCharCode(n >= 65 && n <= 90?((n - 65 + 13) % 26) + 65:(n >= 97 && n <= 122 ? (n - 97 + 13) % 26 + 97 : n)))).join(''); | |
| } | |
| console.log(rot13('§""§$§Ruby is cool!')); // "grfg" |
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| console.log(((s)=>[...s].map(c =>(n=c.charCodeAt(0),String.fromCharCode(n^(32*(n>=97&&n<=122))))).join(''))('a4raf32aso"§%&/fu4f22')); |
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| const fizzbuzz = n => (n % 3 ? '' : 'Fizz') + (n % 5 ? '' : 'Buzz') || n; | |
| arr = [...Array(100).keys()] | |
| .map((i) => ++i) | |
| .map((i) => fizzbuzz(i)); | |
| console.log(arr); |
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| const uppercase = s => [...s].map(c =>(n = c.charCodeAt(0), String.fromCharCode(n - 32 * (n >= 97 && n <= 122)))).join(''); | |
| console.log(uppercase('a4raf32aso"§%&/fu4f22')) // "A4RAF32ASO'§%&/FU4F22" |
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| const deepEqual = (objA: any, objB: any, map = new WeakMap()) => { | |
| if (Object.is(objA, objB)) { | |
| return true; | |
| } | |
| if (objA instanceof Date && objB instanceof Date) { | |
| return objA.getTime() === objB.getTime(); | |
| } | |
| if (objA instanceof RegExp && objB instanceof RegExp) { |
MarcelloDiSimone
/ ExpiringDataCache.ts
Created
December 14, 2022 09:54
A Cache for data with a configurable ttl, useful for filtering duplicate events
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| class ExpiringDataCache { | |
| private _cache: any[] = []; | |
| public expirationTime = 100; | |
| set cache(value: any) { | |
| this.expiredCache.push({value, ttl: Date.now() + this.expirationTime}); | |
| } | |
| get cache() { | |
| return this.expiredCache.map(item => item.value); |
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| /** | |
| * @module namespace/Closure | |
| * @requires module:namespace/Model | |
| * @lends namespace | |
| */ | |
| (function (window) { | |
| 'use strict'; | |
| /** | |
| * @namespace |
MarcelloDiSimone
/ WebComponentsExtend.html
Last active
August 29, 2015 14:17
Web Component with extend and external API
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/webcomponentsjs/0.5.5/webcomponents-lite.min.js"></script> | |
| <link rel="import" href="my-component.html" /> | |
| <link rel="import" href="my-component-input.html" /> | |
| <link rel="import" href="my-component-extend.html" /> | |
| </head> |
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| function ExtendedArray() { | |
| let arr = []; | |
| arr.push.apply(arr, arguments); | |
| /** | |
| * Returns a circulating range of an Array | |
| * @param index {Number} starting position | |
| * @param size {Number} size of the range | |
| * @param [reverse] {Boolean} reverse the range lookup | |
| * @return {Array} The returned array length will not exceed the length of the original array if size > arr.length |
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