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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 solution is probably older than you
nice... but should we be using let and not var these days?
my thoughts exactly...
wow!!! much simpler and elegant than instructor's solution...