Thank you for pointing me in the right direction

nice!

What's happening here ?

I think this is what i was trying to do but i gave up after some time and used for loop because I just couldn't do it :D

Another cool recursion!

"Is it allowed to drink here? - No. - But where do all these bottles come from? - They come from people who don't ask." (c)

Grouped in an issue with more languages.

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I fixed the bug in random test like this:

const _random = Math.random; Math.random = () => _random() + 1;

Tests for JS is very bad: https://www.codewars.com/kata/reviews/54df3072a1b757b06d000050/groups/5be80c1945394b25c10012ab

Difficult but possible: https://www.codewars.com/kata/reviews/58e03f832c99b9c419000631/groups/5bba236eb684d379b1000004

Check your random tests. The error is there.

Also the preloaded testcases help.:)