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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.
what do you mean mutating the input array please? Thanks
my bad,used to do it when i was learning to code with ruby lol.
ugh a return statement in ruby?