my @array = ( 'one', 'two', 'buckle my shoe', );

my $array_ref = \@array;

##</code><code>##

for ( @$array_ref ) {
	...
}

##</code><code>##

print "The third element is $array_ref->[2] \n";

##</code><code>##

print keys %{ $array_ref }; 	# fatal!