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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.
Good point. You could use a regex to strip out everything except (){}[]
This is very good.
I don't like however that this assumes that there will never be any words in between the braces. Which I suppose is a safe bet to make for this particular exercise.