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The following is an archive of a post made to our 'vox-tech mailing list' by one of its subscribers.

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Re: [vox-tech] some excercise for you linux geek.
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Re: [vox-tech] some excercise for you linux geek.



On Thu, Dec 07, 2000 at 04:48:10PM -0800, Mark Kim wrote:
> On Thu, 7 Dec 2000, Micah Cowan wrote:
> 
> > The backslashed-escaped characters {, }, (, and ) would all lose their
> > special meanings in a regex.
> 
> Actually, it depends on the regex interpreter.  As I recall, in PERL, you
> use (...) to represent a group of characters that need to be remembered
> for later recalling.  Under sed, \(...\) is used to do the same.  (Perl
> also uses $1 instead of \1 for recalling, doesn't it?)

Both, actually, but $1 is preferred (because anything higher than \9 won't
work)

> 
> If you don't put the backslashes in front of ( or ), you match the
> parenthesis characters, I think.  The same *seems* to be true for curly
> braces... on Sed, anyway.

Ah, I see.  In Perl it's the reverse.

> 
> -Mark (still a trial-and-error regex user...)
> 


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