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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.
This is my favourite so far, I learned a couple of things from it so thank you for submitting it - I really love that first line where you set up the data structure!
Note: I think people voting best practices on this may be coming at it from a declarative > imperative perspective.