closes #1294

Author: iliakan

1-js/06-advanced-functions/09-call-apply-decorators/01-spy-decorator/_js.view/solution.js

@@ -1,11 +1,12 @@
 function spy(func) {
 
   function wrapper(...args) {
+    // using ...args instead of arguments to store "real" array in wrapper.calls
     wrapper.calls.push(args);
-    return func.apply(this, arguments);
+    return func.apply(this, args);
   }
 
   wrapper.calls = [];
 
   return wrapper;
-}
+}

1-js/06-advanced-functions/09-call-apply-decorators/01-spy-decorator/solution.md

@@ -1 +1 @@
-Here we can use `calls.push(args)` to store all arguments in the log and `f.apply(this, args)` to forward the call.
+The wrapper returned by `spy(f)` should store all arguments and then use `f.apply` to forward the call.