You could do: #!/usr/bin/perl -w
$_ = "200.energy"; (my $temp = $_) =~ s/(\d+).*/$1/; print $temp,"\n"; I'm sure everyone will come up with a different solution. TIMTOWTDI ----- Original Message ----- From: "Peter Jay Salzman" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, January 12, 2002 6:00 PM Subject: Re: [vox-tech] dumb perl question > hi jim, > > thanks for helping me out! > > the string that i'm matching though is $_, not $temperature. $_ holds a > filename, like "100.energy", and i'd like to extract the "100" from the > filename and put it in $temperature. > > doesn't > > $temperature =~ s/(\d+).*/$1/; > > assume that $temperature is the object holding "100.energy"? > > note that i'm being greedy here -- this DOES work: > > /(\d+).*/; # match "100" in $_ > $temperature = $+; # put it in $temperature > > i just want to do it in a single line. :) also, i'd like to do it > without destroying the contents of $_ if possible. > > pete > > > begin Jim Angstadt <[EMAIL PROTECTED]> > > --- Peter Jay Salzman <[EMAIL PROTECTED]> wrote: > > <snip> > > > /(\d+).*/; > > > $temperature = $+; > > > > $1 holds the \d+ matching, because it has parens. > > Multiple sets of parens will match $1, $2, ... based > > on the left to right order of the parens. > > > > If $temperature already had one or more digits \d+ and > > some other junk, replace digits and junk with digits: > > > > $temperature =~ s/(\d+).*/$1/; > > > > Note, if $temperature has a newline character in the > > middle somewhere, then .* will not match it. > > > > --- > > Jim > > > > __________________________________________________ > > Do You Yahoo!? > > Send FREE video emails in Yahoo! Mail! > > http://promo.yahoo.com/videomail/ > > _______________________________________________ > > vox-tech mailing list > > [EMAIL PROTECTED] > > http://lists.lugod.org/mailman/listinfo/vox-tech > > -- > The mathematics [of physics] has become ever more abstract, rather than more > complicated. The mind of God appears to be abstract but not complicated. > He also appears to like group theory. -- Tony Zee's `Fearful Symmetry' > > PGP Fingerprint: B9F1 6CF3 47C4 7CD8 D33E 70A9 A3B9 1945 67EA 951D > _______________________________________________ > vox-tech mailing list > [EMAIL PROTECTED] > http://lists.lugod.org/mailman/listinfo/vox-tech _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com _______________________________________________ vox-tech mailing list [EMAIL PROTECTED] http://lists.lugod.org/mailman/listinfo/vox-tech
