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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.
You're right about using an array or object literal but I'll take the ifs over a switch any day. A switch is like an if with extra steps. I'm with Crockford on that one, not even once!
You're flipping ei to ie too, don't.