...Data::Dumper::Dumper takes an array reference not an array - not quite true, methinx. It's certainly true that the output is more readable if given a ref. - consider

pointo1d@pointo1d-laptop:~/workspace/perl$ perl -MData::Dumper -e '@a 
+= qw/0 1 2 3/;warn Dumper \@a,@a'
$VAR1 = [
          '0',
          '1',
          '2',
          '3'
        ];
$VAR2 = '0';
$VAR3 = '1';
$VAR4 = '2';
$VAR5 = '3';
[download]