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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.
Fizzbuzz. No.
It's a duplicate.
A very poor-quality Kata overall where it is obvious the Kata author has not spent enough time reading up on the JavaScript Test Reference and/or studying the test cases of approved Kata in depth that he/she has completed. I suggest you unpublish this Kata and complete at least 20 more approved Kata on this Website, carefully studying the assertions used in the test cases for each one before attempting to author a functioning Kata.