Lovely when someone answers my exact questions on here :) Much appreciated.

Ta, been asking that myself

No worries - took me a while to learn how it all works!

Thank you for raising this issue.

I've looked at all the languages and can confirm they match now.

For future posts like this, please state the language and mark your comment as an Issue. It helps a lot.

Resilience? arguments is not an Array; args is. So for future-proofing, when prototype methods may be applied to args in new code, it might be useful. Like the curly braces around the single statement in the for-loop.

These days, of course, you'd just do function add(...args) {}.

You are absolutly right. Seems like I had luck when I tried to submit it the first time. Maybe I will fix it