#!/nairvigv/bin/perl
use strict;
use warnings;
use Data::Dumper;

my $file1 = 'BBIDs.txt';
my $file2 = 'fixedincomeTransparency.out.px.derived.updates';
#reading file1 into a hash

my %hash;
my @fields;
open (my $fh,'<',$file1) or die $!;
while(my $line=<$fh>)
{
chomp $line;
 next if $line =~ /^\s*$/;
 $hash{$line}=1;
}
#print Dumper(\%hash);

close $fh;



open (my ($fh2),$file2) or die $!;

while (my $row = <$fh2>)
 {
         chomp $row;

       print "$row\n";
         next if $row =~ /^\s*$/;
        my (@fields) = split(/\|/, $row);



print "$fields[0]\n ";




if (exists $hash{$fields[0]})
{
print "$row\n";
}
}


close $fh2;
~

[download]
Hello this works for a program with less lines i.e 10. However when i run it on a big file say about 700k lines nothing happens. Any idea what can be causing this?

In reply to Re^2: Filtering Output from two files by Anonymous Monk
in thread Filtering Output from two files by vighneshmufc

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