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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.
Thanks for your answer! Agreed with a list creation, it improves code readability (at least). Those type of solutions as above considered here as the best practice, because people here (in codewars), love "one-line" solutions. But in my opinion they are often bad in terms of efficiency or readability, so don't worry too much about votes.
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