Regular Expression Help

[tdavisjr]

Anyone can give me a quick RegEx pattern that would match a 7 or 10
digit number. This is not a range; but exactly 7 or 10. I'm beating
my head over this, nothing I am doing works. Thanks

 

[Karl Seguin [MVP]]

I believe this works:

^\d{7}(\d{3})?$

it makes the last 3 digits optional (as a group)

Karl

 

[Tod Birdsall, MCSD for .NET]

Hi,

You will probably find RegExlib.com to be very helpful. It has a
library of custome regular expressions. There is also a tool that
allows you to test your own regular expressions.

 

[tdavisjr]

Thanks Karl. That seem to work. I probably need to adjust my thinking
when doing RegEx's. I was trying to do something like this: (\d{7}) |
(d{10}) when it was either or. I never thought about making the last
part optional as a group.

And Tod, Thanks for the reference. I did visit this site and used its
tester, however, I searched the database and I could find a simple
example for what I wanted.

 

[Karl Seguin [MVP]]

That works too, you just have your parenthesis in the wrong place:

^(\d{7}|\d{10})$

Karl