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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've done the same thing ;)
--2n vs n. Not exponential, but it's still looping through the list twice instead of just once.--
Edit: Nevermind. Not thinking straight this afternoon (mild aphasia).
You are welcome.