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Editing: es.array.flat-map.js
'use strict'; var $ = require('../internals/export'); var flattenIntoArray = require('../internals/flatten-into-array'); var aCallable = require('../internals/a-callable'); var toObject = require('../internals/to-object'); var lengthOfArrayLike = require('../internals/length-of-array-like'); var arraySpeciesCreate = require('../internals/array-species-create'); // `Array.prototype.flatMap` method // https://tc39.es/ecma262/#sec-array.prototype.flatmap $({ target: 'Array', proto: true }, { flatMap: function flatMap(callbackfn /* , thisArg */) { var O = toObject(this); var sourceLen = lengthOfArrayLike(O); var A; aCallable(callbackfn); A = arraySpeciesCreate(O, 0); A.length = flattenIntoArray(A, O, O, sourceLen, 0, 1, callbackfn, arguments.length > 1 ? arguments[1] : undefined); return A; } });
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