You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
40 lines
1.2 KiB
40 lines
1.2 KiB
'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 |
|
};
|
|
|