--- /dev/null
+'use strict';
+
+var isArguments = require('es5-ext/function/is-arguments')
+ , isString = require('es5-ext/string/is-string')
+ , ArrayIterator = require('./array')
+ , StringIterator = require('./string')
+ , iterable = require('./valid-iterable')
+ , iteratorSymbol = require('es6-symbol').iterator;
+
+module.exports = function (obj) {
+ if (typeof iterable(obj)[iteratorSymbol] === 'function') return obj[iteratorSymbol]();
+ if (isArguments(obj)) return new ArrayIterator(obj);
+ if (isString(obj)) return new StringIterator(obj);
+ return new ArrayIterator(obj);
+};