Re: [Sheflug] Regular Expressions (was Re: Redirecting to a index page depending on group membership on Apache 1.3)

["Chris J" <cej [at] xxxxxxxxxxxxxxxx>]

And Lo! The Great Prophet " Barrie Bremner" uttered these words of wisdom:
>
> perldoc perlre.
>

Indeed, but I don't really use perl that much, about once every six months
or so :)


> Aren't most of the regex syntaxes for GNU and/or UNIX tools pretty
> similar?

Pretty much. grep is where it all started, but it was extended by egrep
(which uses ERE's). They all share the core characteristics: ^, $, ., *,
[...], +, < ... > (I think that's it) but egrep added | and {m,n} amongst
others (need to check docs).

>From what little I've seen of PRE's, they're ERE's with extra bits to make
patterns simpler, as in "\d" to match "[0-9]".

I don't think GNU have done anything to extend basic RE's, so they should
always be portable.

Chris...

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\ Chris Johnson                 \
 \ cej [at] nightwolf.org.uk          \
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