########################################
print 'raw  cu1:'.$cu1."\n"; 
print 'size cu1:'.scalar(@{$cu1})."\n"; 
print 'cu1     :'.join('|',@{$cu1})."\n"; 
########################################

##</code><code>##

c:\@Work\Perl\monks>perl -wMstrict -le
"use Data::Dumper;
 ;;
 my $x;
 print Dumper $x;
 ;;
 $x = [];
 print Dumper $x;
 ;;
 $x = [ 'hi', 'there' ];
 print Dumper $x;
"
$VAR1 = undef;

$VAR1 = [];

$VAR1 = [
          'hi',
          'there'
        ];