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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.
Sorry, but I was replying your first comment.
Sometimes parenthesis let your code cleaner.
not strictly true though. that'll hold if you're invoking a function that accepts parameters. if it doesn't and you don't type
(), that statement will evaluate to the function, not the result of invoking it.