No. This test case means that you also need to handle closures properly, i.e you shouldn't just create a new function and call it; you need to call the original function.

Even if you passed this test case, there are more tests that plays with closure. For example, this is the test after the above test case:

var closure_counter = (function accumulator() { var counter = 0; return function (x) { return counter += x; }; })();

What is the expected behavior of this test case? return NaN or throw exception?

It should be var timesFive = function (x) { var five = 5; return function (a) { return five * x; }(x); };. The test case is incorrect.

Thanks, I have never used destructuring like this

What happens when you call toString on timesFive? You'll find it doesn't give "var timesFive = function () { var five = 5; return function (a) { return five * x; }; }();" so you'll need to find a solution that does.

i belive this is tooooooo big for the most programming languages i had the same error at the number 689 in php

I have the same problem. Would someone help us?

It passes with JS but beware of the way you calculate "choose".

Agreed