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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.
Not sure if this is common knowledge but on Java if you put static int variables (class level) it will always give yes in some scenarios, tho on my local IDE it worked. Moving the variable from class to local level fixed it. Nice Kata tho.