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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.
Seems it is not a good advice. Please look https://stackoverflow.com/a/4042464
As always, there's a trade-off between processing power and memory.
I know. I was change solution but this solution I can't change :) I saw that trouble after I change my solution.
You're right- I should have had the last line return null but my solution made it through the test cases so I didn't look too closely at it :/
thank's for your notice!
unfortunately, i'm deep in other task now(( ..to solve exactly this.
yeah, that would be better...
thank you!
Often it occurs if regexp relies on particular protocol (http/https in current case).