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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.
My code has the following:
I misspelled sub(s)tract and spend 10 minutes on trying to find the issue. No debug output is shown on my FireFox. Works fine on Chromium. Not sure if this is a general site issue or not - just signed up.