Loading collection data...
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 this is good approach to append a '_' on odd strings, makes it more readable than trying to handle it
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converting an array to a set will remove the duplicates
This is what the documentation says
https://developer.apple.com/documentation/swift/stringprotocol/localizedcaseinsensitivecontains(_:)
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