Since you claim to be a "perl beginner" - kcott's (++) code may be a little esoteric.

Here is somewhat simpler and more traditional code (with no module dependencies): 

use strict;
use warnings;

open(my $table, "<", "table.txt") or die "Cannot open Tables";

my %ids2proteins;
while (<$table>){
  chomp;
  my ( $protein, $nbr) = split ;
  next unless $nbr;
  $ids2proteins{$nbr} = $protein;
}
close $table;

open(my $val, "<", "values.txt") or die "Cannot open Values";
while (<$val>){
  chomp;
  next unless length $_ > 1;
  next unless my $prot = $ids2proteins{$_};
  print "$prot => $_ \n";
}
close $val;

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        What is the sound of Perl? Is it not the sound of a wall that people have stopped banging their heads against?
              -Larry Wall, 1992

In reply to Re: How to compare hash values to array values in Perl by NetWallah
in thread How to compare hash values to array values in Perl by To_Bz

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