my @a;
push @a, [ 'a', 'b' ];
push @a, [ 'c', 'd' ];

for my $row (@a) {
   for my $cell (@$row) {
      print("$cell ");
   }
   print("\n");
}

##</code><code>##

my @a;
push @a, \@arraya;
push @a, \@arrayb;