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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.
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As a beginner developer it's very confusing. Hard to judge but how does this code pass the DRY test? What if there's more conditions to come? Are you going to add more returns for each? Is this better than if..else?