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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.
I think the javascript kata should be removed. I have looked at others solutions and they all work because the order of the tests are known. Language wise the feature needed (which exists in i.e. Ruby and Python) does not exist in Javascript so there is no true solution that would work in all cases and when test order is unknown.