Hi perl monks, I am fairly new to perl and have given an attempt to compare two text files, text file A contains several columns containing numbers, text file B contains a column of numbers that I need to match. the 3rd column from text file A contains a unique value ($textpac3) and that unique value may be in text file B ($text1[0]). If both unique values appear in both files and a number from column 11 ($textpac11) matches the $text11 value from text file B then the results will print, however it doesnt seem to print correctly to the matches.txt file, please can someone help me? 
use warnings;
use strict;

my $A_file = 'A.txt';
my $B = 'B.txt';
my $matches ='matches.txt';


open (INPUT, $A_file) or die "ERROR: cannot find file $A_file\n";
open (OUT2, ">$matches");

while (<INPUT>) 

{        
    my @text1=();
    @text1 = split /\t/,$_;
    chomp @text1;
    next if ($text1[0]=~ /L1/gi);

            open (OUT1, "$B");
        
                
                while(<OUT1>) {
                my @textpac=();
                @textpac = split /\t/,$_;
                chomp @textpac;
                
                next if ($textpac[0]=~ /OID/gi);
                        
            if($textpac[3] eq $text1[0] && $textpac[11] eq $text1[11])
+ 
            {
                print OUT2 join( "\t", @text1[ 1, 2, 3 ]  ), "\n";
            }
      }
       
}

close ($A_file);
 close OUT1;

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In reply to Comparing two text files by perlnoobster

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