Array Map Javascript Browser Support

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JavaScript Array map() Method

    https://www.w3schools.com/jsref/jsref_map.asp
    The map() method creates a new array with the results of calling a function for every array element. The map() method calls the provided function once for each element in an array, in order. Note: map() does not execute the function for array elements without values. Note: this method does not change the original array.

Simplify your JavaScript – Use .map(), .reduce(), and ...

    https://medium.com/poka-techblog/simplify-your-javascript-use-map-reduce-and-filter-bd02c593cc2d
    Jan 29, 2018 · If you’re starting in JavaScript, maybe you haven’t heard of .map(), .reduce(), and .filter().For me, it took a while as I had to support Internet Explorer 8 until a couple years ago.Author: Etienne Talbot

Array.prototype.flat() - JavaScript MDN

    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flat
    Aug 22, 2019 · The depth level specifying how deep a nested array structure should be flattened. Defaults to 1. Return value. A new array with the sub-array elements concatenated into it. Examples Flattening nested arrays62%

JavaScript Array Iteration - w3schools.com

    https://www.w3schools.com/JS/js_array_iteration.asp
    JavaScript Array Iteration Methods Previous Next ... Array.map() The map() ... The first browser versions with full support is listed below. 45: 12: 25: 8: 32: Array.findIndex() The findIndex() method returns the index of the first array element that passes a test function.

Array.from() - JavaScript MDN

    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from
    Array.from() has an optional parameter mapFn, which allows you to execute a map function on each element of the array (or subclass object) that is being created. More clearly, Array.from(obj, mapFn, thisArg) has the same result as Array.from(obj).map(mapFn, thisArg), except that it does not create an32%

Map - JavaScript MDN

    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map
    The Map object holds key-value pairs and remembers the original insertion order of the keys. Any value (both objects and primitive values) may be used as either a key or a value.. Description. A Map object iterates its elements in insertion order — a for...of loop returns an array of [key, value] for each iteration.. Key equality. Key equality is based on the sameValueZero algorithm.

ECMAScript 5 compatibility table - GitHub Pages

    http://kangax.github.io/compat-table/es5/
    ECMAScript 5 6 2016+ next intl non-standard compatibility table. ... §Array.prototype.map ... ` both yield false - whereas in a compliant browser, the former would give `false`, the latter `true`. As such, ES5 array iteration methods can only be shimmed reliably when dealing with dense arrays.



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