Izmjenjena struktura, dodan backand

web/node_modules/core-js/modules/$.is-array-iter.js

@@ -0,0 +1,8 @@
+// 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);
+};