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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.
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how is this more clever / best practices if it depends on an object being declared outside of the function?
Lol
I think this one is more clever than using the Set constructor. It actually builds the logic to filter the array. Honestly the first response feels like cheating lol
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