Yeah same. It just doesnt tell anything what to do. xD

good job

Somehow managed to solve this, but with pretty uggly code. This was hard for me. :(

For 20 minutes I did not understand how players change. xD Nice kyu.

I even set a default parameter for function addOrChangeUrlParameter(url, val = ""), but not working (Cannot read property 'split' of undefined,) It IS defined, always, even when not passed in..

One " " made this painfull. xD

Who else googles prime helper function after solving primes couple times without googling? xD

Very funny and easy challenge, it's more about being precice than else, congratulations.

use some kind of tolerance for checking if a number is an integer

Very nice kyu
Version should be updated. Sorted doesnt work properly.

It might be a good idea to change the expected output from bad values of n from empty collections to None/null/Option(I think?) in Python/JS/Java for future maintainability reasons. Should be possible to preserve old solutions as well.

Scala fork with properly grouped tests and 3-5x faster validation function. Can probably make the validation a bit faster still but it seems like more effort than its worth.

fixed