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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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same here
if this were a painting, i would frame it and put it on on my wall.
Pros can solve anything using the reduce().