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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.
I like this. It doesn't lean on Data.Char, doesn't redirect to additional functions (like my first attempt), and each line is crystal clear what it's doing. You could reverse engineer the plain English spec from this code.
Very scary, but surprisingly pretty easy, just follow the types (some of them are singletons !)
Really nice kata, thanks tel !
I seem to have completely failed this kata...