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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.
One comment said that only the last digit is allowed to be an X.. meh
X123456788 seems perfectly valid to me, but apparently i'm meant to return "false"? can someone please explain.
wow. i never even knew about that function.