Edit File: _bind.js
'use strict'; var aFunction = require('./_a-function'); var isObject = require('./_is-object'); var invoke = require('./_invoke'); var arraySlice = [].slice; var factories = {}; var construct = function (F, len, args) { if (!(len in factories)) { for (var n = [], i = 0; i < len; i++) n[i] = 'a[' + i + ']'; // eslint-disable-next-line no-new-func factories[len] = Function('F,a', 'return new F(' + n.join(',') + ')'); } return factories[len](F, args); }; module.exports = Function.bind || function bind(that /* , ...args */) { var fn = aFunction(this); var partArgs = arraySlice.call(arguments, 1); var bound = function (/* args... */) { var args = partArgs.concat(arraySlice.call(arguments)); return this instanceof bound ? construct(fn, args.length, args) : invoke(fn, args, that); }; if (isObject(fn.prototype)) bound.prototype = fn.prototype; return bound; };
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