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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.
This one is almost as short as the one line answer but you have code and it is easy to read and understand.
This is a lot more best practice than the one line answer.
Best Practice? it is completely unreadable
may be it is the shortest one but show it to anyone non JSfluent to see if they understand it