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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.
Nicely implemented, and the comments make it good as a learning resource for newbies like me.
One question: in the stopping condition, how come you check !code? What does that do that codeArray.length doesn't already do?