Question

use Data::Dumper;
%hash = (
    Key  => {test => [[testvalue, 10], [testvalue, 20]]},
    Key2 => {test => [[testvalue, 30], [testvalue, 40]]},
);
my $parm = $hash{Key}{test};
foreach my $test_p (@{$parm}) {
    print Dumper $test_p;
}

It is not displaying in the way I expect.

Answer 1

You can try this:

my %hash = (
    Key  => {test => [['testvalue', 10], ['testvalue', 20]]},
    Key2 => {test => [['testvalue', 30], ['testvalue', 40]]},
);

my $parm = $hash{Key}{test};
foreach my $test_p (@{$parm}) {
    print Dumper $test_p;
}

foreach my $test (keys %hash) {
    my $test1 = $hash{$test};
    print Dumper $test;
    foreach my $test2 (keys %{$test1}) {
        print Dumper $test2;
        my $test3 = $hash{$test}{$test2};
        foreach my $test_p (@{$test3}) {
            print Dumper @{$test_p};
        }
    }
}