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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.
Should have used english(for: 0) instead of hardcode that string. oops.
The reason I used force unwrap was to make it clear that if for some reason the code crashes, was caused by the regex not being good enough.
Plus, handling to return nil doesn't give much context what failed, could have been the regex that rejected it or indeed couldn't access the values after the "split".