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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.
bro it's not best solution bcs it can be O(1) not O(1-4);
Are you saying companies prefer performance over readability? What would make you think that?
No company would ever accept your answer out of style. Your code needs to perform.
easier than it seems