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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.
Consider that this one does not create a new array for every iteration as many others do. I also don't think it's very professional to say it's "copium" to vote for a solution you don't like.
Creating an array for every iteration is not best practices.