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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.
can someone break this regular expression down? i'm not exactly sure what the question mark followed by the i character is doing at the beginning? thanks so much!! really appreciated