Re: Understading array of hashes

[kennethk]

warnings gives you a hint with: Useless use of hash element in void context at fluff.pl line 43. In your for loop, you never actually assign anything, so it is a no-op. You get something very close if you uncomment line 41, so you should probably just concentrate on how to modify your output. Essentially, if you don't want to output something, then don't print it:

my %hash;
$hash{$_->{'type'}} {$_->{'name'}} = $_->{'reference'} for @$array;

#$hash{$_->{'type'}}{ $_->{'name'} }for @$array;

print "Results:\n";
for my $k1 (sort keys %hash) {
    print "    $k1:\n";
    for my $k2 (sort keys %{$hash{$k1}}) {
        print "        $k2\n";
    }
}