Sha256: a9121b7a0ce282656bc7c61379d4d96832343363887215e7d79fcfe3423cf25f
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Versions: 25
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Stored size: 1.04 KB
Contents
'use strict';
var aFunction = require('../internals/a-function');
var isObject = require('../internals/is-object');
var slice = [].slice;
var factories = {};
var construct = function (C, argsLength, args) {
if (!(argsLength in factories)) {
for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']';
// eslint-disable-next-line no-new-func
factories[argsLength] = Function('C,a', 'return new C(' + list.join(',') + ')');
} return factories[argsLength](C, args);
};
// `Function.prototype.bind` method implementation
// https://tc39.github.io/ecma262/#sec-function.prototype.bind
module.exports = Function.bind || function bind(that /* , ...args */) {
var fn = aFunction(this);
var partArgs = slice.call(arguments, 1);
var boundFunction = function bound(/* args... */) {
var args = partArgs.concat(slice.call(arguments));
return this instanceof boundFunction ? construct(fn, args.length, args) : fn.apply(that, args);
};
if (isObject(fn.prototype)) boundFunction.prototype = fn.prototype;
return boundFunction;
};
Version data entries
25 entries across 25 versions & 7 rubygems