Just curious, syntactically how does the comma before res = []; work? I get the terniary part, but lost on what seems to be something extra with the comma.

Thanks for explaining :)

Thanks for adding! However, the change doesn't show up in my sample test spots. Do I have to reload soemthign?

I have passed all but the last (valid special character test) However, I'm having difficulty debugging because there is no example anywhere of what a 'special character' is, and neither can I see the actual test in the test description.