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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.
It may not be the most 'concise' code, but the documentation is spot on. I need to make this a part of my practice.
Great solution. I didn't think about pattern matching in the same places you did. Your code is clean and concise.