using a regex like :
/^src=((\d+\.){3}\d+)\//
Starts at beginning of variable with src= then place in $1 3 sets of digitrs
followed by a period and another set of digits followed by a /
Now you could have the port check as part of the regex, but that would be up
to you.
Assumes the search is being done on $_
Wags ;)
-----Original Message-----
From: Messier, Jean-Francois [mailto:[EMAIL PROTECTED]]
Sent: Thursday, December 06, 2001 08:07
To: '[EMAIL PROTECTED]'; Daniel Falkenberg
Cc: [EMAIL PROTECTED]
Subject: RE: Confirmation...
I'm a beginner in those regular expressions and s/// operations. How
can I extract only the digits and the periods (.) from a string ? I have
something like 206.48.16.3/12345. An IP address with a port number. There
are digits on both sides of the slash, but I would like to keep only the
digits from on the left as well as the periods. More complex question: If I
have something like "src=206.48.16.3/12345", how can I do the same as bove,
but also removing the "src=" at the beginning ?
Thanks :-)
Jean-Francois Messier
Ottawa, CANADA
-----Original Message-----
From: Jeff 'japhy' Pinyan [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, December 05, 2001 11:18 PM
To: Daniel Falkenberg
Cc: [EMAIL PROTECTED]
Subject: Re: Confirmation...
On Dec 6, Daniel Falkenberg said:
>$string =~ s/[^a-zA-Z0-9]//g;
>
>I take it only allows $string to eq anthing in the charcter class of
>a-z, A-Z and 0-9. I also take it that anything other than that will be
>stripped out? Any other comments?
Right. I'd write it as
s/[^a-zA-Z0-9]+//g;
for "efficiency". Or perhaps as
tr/a-zA-Z0-9//cd;
for "clarity". Your ideas of "efficiency" and "clarity" may differ.
--
Jeff "japhy" Pinyan [EMAIL PROTECTED] http://www.pobox.com/~japhy/
RPI Acacia brother #734 http://www.perlmonks.org/ http://www.cpan.org/
** Look for "Regular Expressions in Perl" published by Manning, in 2002 **
<stu> what does y/// stand for? <tenderpuss> why, yansliterate of course.
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