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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.
It's a complete misuse of ternary operators. You should only use ternary operators when you're going to return something with it.
it is advised not to use nested ternary operators because it might easily get confusing :) at least, that is what i learned