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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.
Too big, it is possible to make the pattern shorter
Too late to change...
This comment is hidden because it contains spoiler information about the solution
v.gr. FirstNonRepeating("s[{\^~|]}treSS")