It isn't supposed to be True. However, I can't recreate the problem. I've run the Python test cases 20 times now, and they seem to be doing fine.

If this keeps happening to you, could you share your code with me and I'll give it another go?

unchangable

Agree! At least in Python this should be at least a 6kyu

That's not the correct input for that test.

Ask the translator down below, then, as I am afraid C# is out of my hands.

Language?

I dunno, I had a bunch of easier 5 kyu katas then it popped up with this 4 kyu kata. This kata definitely took me way longer to solve than the 5 kyu ones I had worked on.

Language level rankings would be ideal but it creates a huge mess of work to change. Schema changes, API changes, all of the edge cases for dealing with it in the UI, separate rankings for each language means even longer to get a kata out of beta. Its not likely to happen unfortunately.

As for the specific case of C# and JS, lodash is a nice library to compensate the lack of some features in JS.

Just did this in Javascript. I wouldn't consider it hard, just very tedious.

It's easy in e.g. c#, but quite difficult in JS, though.

Agreed!

The kyu are given by a moderator when he approves the kata, not given by the author...