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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.
Did you ever figure out why it failed? I'm having the same issue.
My answer returns as [0, 3, 4, 6] while the answer is [0,3,4,6]
I need to get rid of the white space between the numbers, but for the life of me i cannot figure out how. I've been googling and nothing.