You could use this as well: 
use strict;
my %hash;
my $file = 'infile.txt';

open INFILE, "<$file" || die "Can't open '$file' $!\n" ;
$hash{$_}++ while <INFILE>;

open OUTFILE, ">$file" || die "Can't open '$file' $!\n" ;
print OUTFILE "$_" foreach (keys %hash);

[download]

--Jim

In reply to Re: Remove duplicate data from text file by jlongino
in thread Remove duplicate data from text file by peppiv

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