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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.
Got it down to 299 characters in Clojure using some very dirty tricks, and
I don't think I can get any lower without a radically new approach(update: I did it, although the approach was sub-optimal as shown by other solutions).But it's been tremendously fun! :)