On 6/12/07, yitzle <[EMAIL PROTECTED]> wrote:
Issues with both methods:
snip

If you only want to reduce runs (as opposed to removing dups) then

#!/usr/bin/perl

use strict;
use warnings;

my $cur = undef;
while (<DATA>) {
       print unless defined $cur and $_ eq $cur;
       $cur = $_;
}

__DATA__
AAAAAAAAAAAAA
AAAAAAAAAAAAA
AAAAAAAAAAAAA
BBBBBB
AAAAAAAAAAAAA
NNNNNNNNNNN
NNNNNNNNNNN
AAAAAAAAAAAAA
CCCCCCCCC
CCCCCCCCC
CCCCCCCCC
CCCCCCCCC
AAAAAAAAAAAAA

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