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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.
It took me a little while to read that, feels a little overengineered but it probably performs well so I'd say that's decently clever.
It's a perfectly valid and good solution, it MIGHT have a tiny performance cost (which doesn't really matter anyway) but the reason why I commented was to just let you know the other solution.
This comment is hidden because it contains spoiler information about the solution
This comment is hidden because it contains spoiler information about the solution