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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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I think it's the first time I see a practical use of the spaceship operator '<=>' very clever
One thing I found useful using regex is to use the flag 'i' to make it case insensitive.
instead of /[aeiouAEIOU]/ , /[aeiou]/i
wow, I never thought of using spaceship operator. Nicely done