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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.
The instructions are a bit lacking, yes. But some of the katas are partly (or wholly) about figuring out what to do.
About the messy code, I agree with you if you're referring to this particular solution. It's not very good style to declare some member functions inside of the constructor and some outside on the prototype object. Only inside or outside is better, but if you want to keep the name property "private" you need to use the "inside" method.