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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 solution is clever, but I wouldn't consider it best practice. Its really hard to fathom what the code does, if you didn't wrote it yourself. Or if you wrote it yourself but didn't look at it for like two weeks.