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

my $array_of_hashes_ref = [
                           {
                            h1key1 => "h1val1",
                            h1key2 => "h1val2",
                           },
                           {
                            h2key1 => "h2val1",
                            h2key2 => "h2val2",
                            h2key3 => "h2val3",
                           },
                          ];

print Dumper( $array_of_hashes_ref );
test_sub( $array_of_hashes_ref );

sub test_sub {
    my $aoh_ref = shift;
    print Dumper( $aoh_ref);
}