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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.
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Wow, very good solution! A bit verbose, but definitely better practice imo.
The reason is: people voted it as Best Practice.
Probably a CodeWars issue then, not a kata issue.
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(-2) * 2 = -4
-4 - 2 = -6
I don't think there is any problem with it. :)
Weird. I've tried your solution and I didn't have any problems with 'final submit'.