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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.
Hi, I had the same problem. Locally my code is running properly, println() prints numbers from count() method in correct order, but tests say that I return an empty array.