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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 like it. I am not sure about the performance of this solution. Are you sure that usage of sorting is the best practice? I am a new user on Codewars. It is not clear for me should we take the performance into consideration?
Anyway, I use GroupBy for word and words. And compare groups. May it provide less execution time?