I think that this solution is the most interesting!

This solution is all but ridiculous. It is clear, concise, idiomatic, and avoids the use of any loops and/or dynamic array creation/extension, which are resource expensive processes.

just ridiculous

very clever :)

hygl

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Comma_Operator

Thanks to your solution, I learned "comma operator" =)

It is just the recursive form of the other iterative solutions...

gj

how can you think of it ? Amazing!