Hi,

I am trying to remove duplicate lines from a file if I find a specific string match at a specific location. I am supposed to be opening up a set of 8 files. These files are huge. I am reading them line by line and looking for a unique number at 10th and 11th position on each line. If this number is repeated in the next line, I am supposed to disregard that line. Later, I am connecting to a DB and performing some XML parsing on all feeds that come back from DB for each line. For example, if one of the text file is like this: 
AB000000026JHAHKDFK
AB000000028JHKHKHKJ
AB00000003033AFSFAS
AB000000030HJHKH80J
AB000000030LOIKJUJ8        
AB0000000324446KJHK

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I am only supposed to be considering following since 30 is repeated for 2 more lines. 
AB000000026JHAHKDFK
AB000000028JHKHKHKJ
AB00000003033AFSFAS
AB0000000324446KJHK

[download]
Here is my code: 
use DBI;
use Time::localtime;
use File::Compare;

use XML::Simple; # qw(:strict);
use Data::Dumper;

$user = "213256";

@fileRead = glob '/export/home/$user/Tests/Match/dummy2*';

my @array1;
foreach $file (@fileRead){

  open(FILE, $file) or die "Can't open `$file': $!";
  @lines = <FILE>;
  close FILE;

  foreach $line ( @lines ) {
        $str = $line;

        $var = substr($str, 10, 2);
        push(@array1, "$var");
        my @unique = grep { ! $seen{$_}++ } @array1;

  }
......


}

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I am stuck in that last foreach loop as I am not sure what I can do. Like I mentioned, I am performing other functions to these lines. But I am just having trouble with avoiding these lines with repeated unique codes. I want this code to be able to move over to next line if same unique code is found.

Thanks

In reply to Removing duplicates lines by vihar

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