Please use spoiler flag next time.

Now it's 6 :(

I've made the changes, please review it again.

Pretty sure he isn't asking for a technical solution Baronf, he's pointing out the behaviour is undefined based on the description. You pointing out you can return an alternate value using an if-statement is not useful when the expected value for the empty array is not defined in the specification. Should it be NaN? 0? null/None?

Thank you

@Shephard No "something else" here, just adding a reference.

I can't believe this is possible. I mean, i expected append() to behave as a pass-by-reference at best, but this is something else, it feels like the language (interpreter...) is creating some obscure references and when something is being modified, it translates to everywhere in real-time (kind of a really really bizarre observer pattern)

Only 6 now ;-)

I agree, you could put it more subtle, like a # try this comment in the initial code...

You're welcome!

@doc_d0s are you sure about that ? 14 + 14 + 14 +14 +2 = 58 not 72.