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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.
Why isn't the time complexity
O(n^2)? For each element in a, you need to scan the whole content of b. (Unless Ruby does something better under the hood).Watch out, the toPrint.strip() does not change toPrint.