| 'use strict'; |
| |
| var $TypeError = require('es-errors/type'); |
| var isObject = require('es-object-atoms/isObject'); |
| |
| var Get = require('./Get'); |
| var LengthOfArrayLike = require('./LengthOfArrayLike'); |
| var ToString = require('./ToString'); |
| |
| var isPropertyKey = require('../helpers/isPropertyKey'); |
| |
| // https://262.ecma-international.org/16.0/#sec-createlistfromarraylike |
| |
| module.exports = function CreateListFromArrayLike(obj) { |
| var validElementTypes = arguments.length > 1 |
| ? arguments[1] |
| : 'ALL'; // step 1 |
| |
| if (validElementTypes !== 'ALL' && validElementTypes !== 'PROPERTY-KEY') { |
| throw new $TypeError('Assertion failed: `validElementType` must be ~ALL~ or ~PROPERTY-KEY~'); |
| } |
| |
| if (!isObject(obj)) { |
| throw new $TypeError('Assertion failed: `obj` must be an Object'); // step 2 |
| } |
| |
| var len = LengthOfArrayLike(obj); // step 3 |
| var list = []; // step 4 |
| var index = 0; // step 5 |
| while (index < len) { // step 6 |
| var indexName = ToString(index); // step 6.a |
| var next = Get(obj, indexName); // step 6.b |
| if (validElementTypes === 'PROPERTY-KEY' && !isPropertyKey(next)) { |
| throw new $TypeError('item ' + indexName + ' is not a valid property key'); // step 6.c |
| } |
| list[list.length] = next; // step 6.d |
| index += 1; // step 6.e |
| } |
| return list; // step 7 |
| }; |