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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.
That's Python, not Ruby, and it does need return to work.
at w3schools there is lot
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You don't actually need "return", not that it hurts to have it in there. Ruby automatically returns the last line of code.
This comment is hidden because it contains spoiler information about the solution
This comment is hidden because it contains spoiler information about the solution