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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.
Thanks! I'm curious, what's your criteria for using guard vs. if? I typically only use guard when failing the guard would be interpreted as a failure case for the method, or when I'm trying to unwrap an optional that I'd need to use later in the method.