in reply to searching in large file
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' ] };
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
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
Hope this helps, BR.
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