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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.
Your IQ is 3 times as high as the average Joe's.
I used a functional approach, in which you dont modify the array, you create a new one with the new values, do not need to instantiate any variable neither put an extra line to return its value.