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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.
Test cases have errors. Also, if the given list contains a zero that zero shouldn't be passed through to the returned list
Cheers for pointing this out. I've ammended the description and tests for the above
Thanks, This is fixed now