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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.
The test is sending an empty array when expecting a rotated 3x3 array of 1-9 during the second test.
This was a good laugh after working on the algorithm
I really like the use of sub and whole here.
This sent me to learn more about regular expressions. Thanks for the learning opportunity!