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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.
Not optimal time complexity. You iterate thru the entire listOfArt array for each value in the listOfCat array. It can be solved by iterating thru each array only once.
wtf lol
This can be done much easier without having to convert your int to a string.