The triple chevron represents a Here String, which feeds the string on the right to the operation on the left(input redirection)

clean clean

Thanks, now I understand.

How does that work?

same

It should panic, according to the description that's an invalid input.

If you enter 11 the code will panic. I don't think this is a "best practice."

what does this mean: bc <<<

Thanks ! I will check that out :)

Unfortunately, it's not possible directly. There's a feature request created and some workarounds, for example read this issue on Codewars Github.

Is there a way to browse Katas I did not finished in a specific language ?

Right now when I select "Language: C#" & "Progress: Kata I have not completed", Katas I completed in Haskell but not in C# do not appear in the list.

To put it in code, what I want is (All_C#_Katas - Finished_C#_Katas) instead of (All_C#_Katas - Finished_Katas).

Do you know how to show this list ?

same here

I think so. I mean it's even easily than 8kyu....