At 01:30 PM 5/8/2008, Steve Willoughby wrote:
On Thu, May 8, 2008 12:40, Dick Moores wrote:
> But here's a chance to ask: What regex would match 2-digit strings
> and 4-digit strings only?
^\d\d(\d\d)?$
Ah. And so ^\d\d(\d\d)?(\d\d)?$ matches all and only 2-, 4-, and
6-digit strings. Which makes me wonder if there's a regex for ALL
and only strings of digits only, with an even number of digits.
> And another: What regex matches the "" string?
^$
Oh, of course.
Thanks,
Dick
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