#!/usr/bin/perl -w
#
use strict;
use warnings;
use Data::Dumper;

my %singleLevelHash = ();

my %multiLevelHash = (
    'firstSampleKey' => 'SampleValue',
    'secondSampleKey' => {
    'secondLevelSampleKey' => { 
        'thirdLevelSampleKeyOne'   => 'thirdLevelSampleValue',
        'thirdLevelSampleKeyTwo'   => 'thirdLevelSampleValue',
        'thirdLevelSampleKeyThree' => 'thirdLevelSampleValue',
    }
    }
);

# print Dumper \%multiLevelHash;
show_this(\%multiLevelHash);

# foreach my $firstSampleKey ( sort keys %multiLevelHash ) {
#     print $firstSampleKey . "\n";
#     foreach my $secondLevelSampleKey ( sort keys $multiLevelHash{$firstSampleKey} ) {
#     print $secondLevelSampleKey . "\n";
#     }
# }


sub show_this {
	my ($x) = @_;

	if (ref $x eq "") {
		printf "  Value: '%s'\n", $x;
	} elsif (ref $x eq 'SCALAR') {
		printf "  SCALAR ref:  '%s'\n", $$x;
	} elsif (ref $x eq 'HASH') {
		print "  HASH ref '$x':\n";
		foreach my $key (keys %$x) {
			my $val = $x->{$key};
			print "  $key:  ";
			show_this($val);
		}
	} elsif (ref $x eq 'ARRAY') {
		print "  ARRAY re '$x':\n";
		foreach my $val (@$x) {
			show_this($val);
		}
	}
}