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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.
...because slicing arr makes it slower, actually
@supervik what exactly is the difference in performance? how would you quantify that?
It seems to work fine for that input too.
Would break for [0, 0, 0, 1]
Very nice solution.