sub delve {
    my ($ref, $key) = @_;

    #my $key_val;

    if ('ARRAY' eq ref $ref) {
        for my $element (@$ref) {
            if ($key) {
                delve ($element, $key);
            } elsif (ref $element) {
                delve ($element)
            }
        }

        return ;
    }

    if ('HASH' eq ref ($ref)) {
        for my $nestedKey (keys %$ref) {
            my $value = $ref->{$nestedKey};

             if ($nestedKey =~ /^-|\w/) {
                delve ($value, $nestedKey)
            } else {
                delve ($value, $key)
            }
        }

        return $key_val;
    }

    return if ref $ref; # Some other reference type - ignore it

    if ($key) {
        printf "%22s: %s\n", $ref, $key;

        $key_val->{$ref} = $key;
        return $key_val;

    }
}