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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.
Take out the loop skeleton and update it so that the function can add an arbitrary number of empty arrays. Good beginner kata that might look harder than it is.