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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.
Your solution is OK
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you had to use ternary operator with a lot a parentheses
Compared to this top solution, I'm curious if my solution is readable for beginners, or are those extra variables unnecessary? Would anybody care to comment?