Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
This is basically copy-pasted from Rosetta Code, though I did write the original a few months back, so it's not really copy-pasted though the idea was never really mine (I just simplified it).
Okay, I'm marking this as resolved.
Here, I've marked your post as a spoiler, feel free to put your code down.
I'm getting a so-called "Unknown error." I can't give to code or it will be a "spoiler" though. Note that it works on my local machine.
Confirmed in Haskell