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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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Benchmarking of solutions please. I've seen several "best practice" or "clever" solutions that are orders of magnitude slower than alternative answers and it would add an additional insentive to revisit kata.
Please, Please, PLEASE, do not use animations which cannot be stopped, paused or hidden. See WCAG 2.1 and 2.3 http://www.w3.org/TR/WCAG20/.