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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.
Going on https://www.codewars.com/users/JohanWiltink comment to this regarding Haskell incorrect tests - the rust tests are similarly incorrect. I don't think this kata is good. Pls remove.
The number of good solutions to this task is amazing! Can we order by efficiency as every one is reasonable.