--- /dev/null
+// check on default Array iterator
+var Iterators = require('./_iterators')
+ , ITERATOR = require('./_wks')('iterator')
+ , ArrayProto = Array.prototype;
+
+module.exports = function(it){
+ return it !== undefined && (Iterators.Array === it || ArrayProto[ITERATOR] === it);
+};
\ No newline at end of file