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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.
Yeah, it's not practical to learn a new language this way in my opinion
The sample tests are not helpful because you can pass them just by doing:
Then the other tests fail and for a beginner it's hard to undertsand what is failing.