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