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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 really liked this solution, however I found a little bug.
The '.' in 'www.' currently matches any character, which means if my input is 'wwwsomething.com' the function will return very weird values, depending on the number of w's.
I suppose you meant to write that as 'www\.', to match only dots.
'_'(space) => (
@ => (