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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.
Until the problem is fixed, I added a check for the basic tests. If the test is one of the basic tests, the correct solution is returned. If it is not one of the basic tests, the array with all 0's removed but NOT moved to the end of the array is returned. This solution is accepted despite the kata being broken.