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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 how this code is so verbose, easy to follow. However, it'd be better if he didn't use any prototype methods, otherwise, a lot of the code seems redundant.
Is the big-o for this N^2?