Hello sabas,

Welcome to the Monastery. The fellow Monks have already suggested solutions to your question. I just wanted to add one more by using a module.

A few days ago a similar question was asked find common data in multiple files. I think the best approach is to use the module setop to compare the files and to capture output easily you can do it with IPC::System::Simple.

Sample of code below:

#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;
use IPC::System::Simple 'capture';

my $cmd = "setop --intersect " . join " ", @ARGV;

chomp (my @output = capture( $cmd ));

my %hash;
$hash{$ARGV[1]} = \@output;

print Dumper \%hash;

__END__

$ perl test.pl file1.txt file2.txt
$VAR1 = {
          'file2.txt' => [
                           'Sample line 1',
                           'Sample line 2',
                           'Sample line 3',
                           'Sample line 4',
                           'Sample line 5',
                           'Sample line 6',
                           'Sample line 7',
                           'Sample line 8',
                           'Sample line 9',
                           'Sample line 10'
                         ]
        };

[download]

I do not know if this module is the fastest or the more efficient solution but you can Benchmark.

Input data that I used to replicate your question, file1.txt

Sample line 1
Sample line 2
Sample line 3
Sample line 4
Sample line 5
Sample line 6
Sample line 7
Sample line 8
Sample line 9
Sample line 10

[download]

Input data that I used to replicate your question, file2.txt

Sample line 1
Sample line 2
Sample line 3
Sample line 4
Sample line 5
Sample line 6
Sample line 7
Sample line 8
Sample line 9
Sample line 10
Sample line 11
Sample line 12
Sample line 13
Sample line 14
Sample line 15
Sample line 16
Sample line 17
Sample line 18
Sample line 19
Sample line 20

[download]

Hope this helps, BR.

Seeking for Perl wisdom...on the process of learning...not there...yet!

In reply to Re: searching in large file by thanos1983
in thread searching in large file by sabas

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