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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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python len is O(1) itself
I like the fact that this just takes O(1) instead of O(len(name))
There's still an issue with the return type of the function in c#. It needs to be public static string[] CapMe(string[] strings)
There's a 7kyu kata called Disemvowel Trolls that's the same, but you have to account for uppercase letters.