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- '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
- };
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