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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:)
If you're going to check length, you may as well do it with the built-in length checking in Regex :).
Also, avoid return true / else return false structures. You can use
pin.match?
which will return that for you.