regular expressions - math on backreferences

From: Chris Nolte (cgn3089_at_earthlink.net)
Date: 05/20/04

  • Next message: Joe Smith: "Re: regular expressions - math on backreferences" 
    Date: 20 May 2004 08:57:38 -0700

    I want to write a Perl script to modify a bunch of my programming run
    scripts, where each script will have a number of lines that need to be
    incremented.

    Here is what I have tried:
    #!/usr/bin/perl -w
    use strict;

     foreach my $in (glob "run.cctm*") {
            chomp($in);
            open IN, "<$in" or die "can't open $in for input\n";
            my $out = "$in.new";
            open OUT, ">$out" or die "can't open $out for output\n";
            while (<IN>) {
                    s,NEXTDAY\s*=\s*jul(\d+),NEXTDAY = jul$1+1,;
                    print OUT;
            }
            close IN;
            close OUT;
    }

    original: set NEXTDAY = jul22
    desired : set NEXTDAY = jul23
    result : set NEXTDAY = jul22+1

    Thanks for any help on how to do this.

    Chris

  • Next message: Joe Smith: "Re: regular expressions - math on backreferences"

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