source: imaps-frontend/node_modules/es-abstract/2017/CreateListFromArrayLike.js@ 79a0317

'use strict';

var callBound = require('call-bound');

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 isObject = require('../helpers/isObject');

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 (!isObject(obj)) {
                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;
};