use strict;

sub foo {
  my ($val1,$val2,$arr_ref1,$arr_ref2) = @_;
  print "$_\n" for ($val1,$val2,$arr_ref1,$arr_ref2);
};

my @a = qw(a1 a2 a3);
my @b = qw(b1 b2 b3 b4 b5);

foo(1,2,\@a,\@b);