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Improve iterators handling in Array.from

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Mariusz Nowak
2014-04-29 17:09:19 +02:00
parent 2da8a7c6dc
commit fc804a0676
1 changed files with 9 additions and 8 deletions
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array/from/shim.js
+9 -8
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@@ -1,16 +1,17 @@
'use strict';
var isArguments = require('../../function/is-arguments')
, toPosInt = require('../../number/to-pos-integer')
, callable = require('../../object/valid-callable')
, validValue = require('../../object/valid-value')
, isString = require('../../string/is-string')
var iteratorSymbol = require('es6-symbol').iterator
, isArguments = require('../../function/is-arguments')
, toPosInt = require('../../number/to-pos-integer')
, callable = require('../../object/valid-callable')
, validValue = require('../../object/valid-value')
, isString = require('../../string/is-string')
, isArray = Array.isArray, call = Function.prototype.call;
module.exports = function (arrayLike/*, mapFn, thisArg*/) {
var mapFn = arguments[1], thisArg = arguments[2], Constructor, i, arr, l, char, code, iterator
, result;
, result, getIterator;
arrayLike = Object(validValue(arrayLike));
@@ -32,9 +33,9 @@ module.exports = function (arrayLike/*, mapFn, thisArg*/) {
}
return arr;
}
if ((typeof arrayLike['@@iterator'] === 'function')) {
if ((getIterator = arrayLike[iteratorSymbol]) !== undefined) {
arr = new Constructor();
iterator = arrayLike['@@iterator']();
iterator = callable(getIterator).call(arrayLike);
result = iterator.next();
i = 0;
while (!result.done) {