How can I debug my regex pattern?

I'm having trouble with my regex pattern. It doesn't seem to match the expected strings.

I can help with that! Could you share the regex pattern you're using and the strings you're trying to match?

Sure, my pattern is ^\d{3}-\d{2}-\d{4}$ and I'm trying to match '123-45-6789'.

Your pattern looks correct for matching a format like '123-45-6789'. Are you sure the input string is exactly that?

Yes, but I'm also trying to match '123-45-6789 ' (with a space at the end). How can I adjust my regex?

You can modify your regex to allow for optional whitespace at the end by using \s* like this: ^\d{3}-\d{2}-\d{4}\s*$. This will match any trailing spaces.