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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.
I love this one. It clearly shows the steps to convert a DFA to a regular expression.
Ok this is illegal
Hell no bro you can't just do that and call that test broken, YOUR SOLUTION is broken