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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'm a clojure newbie. So, in clojure it doesn't matter if the type is sequence or vector as long as they can be used the same, right?
I think using valueOf is best because it doesn't cache any values.