need some regular expression help

[Theerasak Photha]

On 10/8/06, Roy Smith <roy at panix.com> wrote:
> "Diez B. Roggisch" <deets at web.de> wrote:
> > Certainly true, and it always gives me a hard time because I don't know
> > to which extend a regular expression nowadays might do the job because
> > of these extensions. It was so much easier back in the old times....
>
> What old times?  I've been working with regex for mumble years and there's
> always been the problem that every implementation supports a slightly
> different syntax.  Even back in the "good old days", grep, awk, sed, and ed
> all had slightly different flavors.

Which grep? Which awk? :)

-- Theerasak