'use strict'; var callBound = require('call-bind/callBound'); var $TypeError = require('es-errors/type'); var $indexOf = callBound('Array.prototype.indexOf', true) || callBound('String.prototype.indexOf'); var $push = callBound('Array.prototype.push'); var Get = require('./Get'); var IsArray = require('./IsArray'); var ToLength = require('./ToLength'); var ToString = require('./ToString'); var Type = require('./Type'); var defaultElementTypes = ['Undefined', 'Null', 'Boolean', 'String', 'Symbol', 'Number', 'Object']; // https://262.ecma-international.org/6.0/#sec-createlistfromarraylike module.exports = function CreateListFromArrayLike(obj) { var elementTypes = arguments.length > 1 ? arguments[1] : defaultElementTypes; if (Type(obj) !== 'Object') { throw new $TypeError('Assertion failed: `obj` must be an Object'); } if (!IsArray(elementTypes)) { throw new $TypeError('Assertion failed: `elementTypes`, if provided, must be an array'); } var len = ToLength(Get(obj, 'length')); var list = []; var index = 0; while (index < len) { var indexName = ToString(index); var next = Get(obj, indexName); var nextType = Type(next); if ($indexOf(elementTypes, nextType) < 0) { throw new $TypeError('item type ' + nextType + ' is not a valid elementType'); } $push(list, next); index += 1; } return list; };