The comments should explain what's going on: 
my %subkeys;

# The keys of %subkeys are the subkeys, i.e. GID, AIG, TEA in this cas
+e.
undef @subkeys{map keys %{ $VAR1->{$_} },keys %$VAR1};

# For each subkey, go through the hash and pick up the corresponding v
+alue.
for my $subkey (sort keys %subkeys) {
    print +($subkey,
            join "\t", q(),
            map $VAR1->{$_}{$subkey},
                sort { $a <=> $b } keys %$VAR1),
          "\n";
}

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In reply to Re: Format a Dumper module output file. by choroba
in thread Format a Dumper module output file. by oxydeepu

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