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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 only problem I have with this is, dynamic method definitions make being able to grep the code base for method definitions while refactoring hard.
If you look at some of the solutions it is definitely not tested.
It isn't tested.
Did not the kata say not to modify the original list?
Is this tested in a test case?