use strict;
use warnings;
use Data::Dumper;

my %HOAOH1 = (
	'details' => [
		{
			'name' => 'bbbb',
			'time' => 1234,
			'place' => 'AB'
		},
		{
			'name' => 'aaaa',
			'time' => 5678,
			'place' => 'CD'
		},
		{
			'name' => 'aaaa',
			'time' => 91011,
			'place' => 'EF'
		},
		{
			'name' => 'aaaa',
			'time' => 121314,
			'place' => 'GH'
		},
		{
			'name' => 'cccc',
			'time' => 151617,
			'place' => 'IJ'
		},
	]
);

print Dumper \%HOAOH1; # See how useful Data::Dumper is for debugging hashes and more complex data structures?

print $HOAOH1{'details'}; # Do you see why this just prints an array reference?
print "\n";
print @{$HOAOH1{'details'}}; # Do you see why this just prints a bunch of hash references?
print "\n";

foreach my $hash_reference (@{$HOAOH1{'details'}}) # Do you see how this loop is accesing the lowest level hash keys and values?
{
	# Do you see the two different ways of de-referencing used here?
	print "$_=$$hash_reference{$_} " foreach (sort keys %{$hash_reference});
	print "\n";
}