What is the RFC complicant and working regular expression to check if a string is a valid URL?

After reading RFC 3986, I have to say I was wrong. That regexp is fully working (that I know). First mistake I had was syntax of IPv6 addresesses, they are put around , and second was about example.org: (note trailing double dot :).

But as the RFC says scheme can have dots in it, so it's also valid.

Well, if you look at it, the specification is broken down into "chunks". That's how I'd suggest building the regex so that it's easier to read, more maintainable and understandable. So, the parts of the regex are (Optional are italicized).

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.