$ cat sample.pl 
use strict;
use CGI::Ex::Dump qw(debug);
my $a = 123;
my @b = qw(1..10);
my $obj = bless {}, __PACKAGE__;
debug;
debug $a, \@b, $obj;
debug "Arbitrary String "x2;
debug {"a".."f"};

$ perl sample.pl 
debug: sample.pl line 6
debug: sample.pl line 7
  $a = 123;
  \@b = [
            "1..10"
          ];
  $obj = bless( {}, 'main' );
debug: sample.pl line 8
  String = "Arbitrary String Arbitrary String ";
debug: sample.pl line 9
  {"a".."f"} = {
            a => "b",
            c => "d",
            e => "f"
          };