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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.
Random tests added, but it may no longer make sense for this duplicated kata...
I'm going to delete it because it's a duplicate. thanks for your feedback!
Also, no random tests? In Haskell? When QuickCheck is so easy to use...
What makes this kata different from these?
https://www.codewars.com/kata/54fdbad0762e2e8a54000452
https://www.codewars.com/kata/52829c5fe08baf7edc00122b
It's even a very common question, such as https://stackoverflow.com/questions/13517114. Clearly it's not a good kata idea.