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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.
Thanks for the suggestions!
If you think of any random test cases/edge cases, I'd definitely like to add some.
With the solution I have, it'd just be duplicating everything (with negatives & 'in' instead of 'ago') - unless someone comes up with a solution that incorporates it I won't worry about it for now! Thanks though :)
Good catch. Did you add this test case?
tricky, but good kata!