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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.
Why 62847?
Voting clever, because it is. Definitely not best practice: spec-wise, the order of keys in an object is undefined, so it's only by chance that V8's
Object.keyshappens to return the keys in order of definition. I love the hack, just want to point that out so that people don't rely on this for "actual" code.