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Regular Expression Tools

I’m still at the point where I can use stuff like ^\d{3}[-| ]?\d{2}[-| ]?\d{4}$ and not fully understand the pieces. So i’m always looking for decent RegEx tools. Eric Gunnerson had a good post about suing RegEx to validate a SSN

But first, a word about tools. It’s a lot easier to use a tool to do this sort of thing than it is to write code to do it. So, I suggest one of the following