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