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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.
This is terrible practice and not clever. The whole point of these helpers is to use the linked list structure to run those methods. If you're converting back into an array why even have a linked list? These solutions are 3x slower than necessary.