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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.
Exactly what I felt =D
This made me chuckle
I have looked at it again now I understand the edge case its when its checking if it's decrementing.
I have updated https://www.codewars.com/kata/reviews/52c4e0b77119e927290002aa/groups/6541aaa3209ae200013f41b3