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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.
In Swift
I managed to get all the sample tests to work. When I submit however, 8 tests fail (while it says none have passed). On the other hand, if I intentionally screw up the result, it shows me 134 tests fails... What am I doing wrong ? :(