c:\@Work\Perl>perl -wMstrict -MData::Dumper -le
"my $final = { qw(a 1  b 2  c 3), d => [ 9, 8, 7 ] };
 my @x = qw(a b c);
 print 'data to start';
 print Dumper $final;
 print Dumper \@x;
 ;;
 my $f = 'ZOT';
 ;;
 print 'void-context expression';
 ($final->{$x[1]}, $f);
 print Dumper $final;
 ;;
 print 'assign list in scalar context';
 $final->{$x[1]} = ($final->{$x[1]}, $f);
 print Dumper $final;
"
Useless use of hash element in void context at -e line 1.
Useless use of hash element in void context at -e line 1.
Useless use of private variable in void context at -e line 1.
data to start
$VAR1 = {
          'c' => '3',
          'a' => '1',
          'b' => '2',
          'd' => [
                   9,
                   8,
                   7
                 ]
        };

$VAR1 = [
          'a',
          'b',
          'c'
        ];

void-context expression
$VAR1 = {
          'c' => '3',
          'a' => '1',
          'b' => '2',
          'd' => [
                   9,
                   8,
                   7
                 ]
        };

assign list in scalar context
$VAR1 = {
          'c' => '3',
          'a' => '1',
          'b' => 'ZOT',
          'd' => [
                   9,
                   8,
                   7
                 ]
        };