> if speed matters consider reading both files first, if you put the data of the second into a hash you can check much faster.

like this

use strict;
use warnings;

use Data::Dump qw/pp/;


open my $qqq,"<","qqq.txt" or die "Open qqq failed $!";
open my $exp,"<","exp.txt" or die "Open exp failed $!";

my @exp = <$exp>;
chomp @exp;


my %qqq;
while (<$qqq>) {
  my ($value,$key) = split /\s+/;
  push @{$qqq{$key}},$value;
}

#pp \%qqq,\@exp;

print "$_: @{$qqq{$_}}\n" for @exp;

[download]

out 

a: 1 11
c: 333

[download]

Cheers Rolf

( addicted to the Perl Programming Language)

In reply to Re^2: Threading two text files by LanX
in thread Threading two text files by ostra

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