c:\@Work\Perl\monks>perl -wMstrict -le
"my @array1 = qw/ball bat helmet/;
 print qq{\@array1 before: (@array1)};
 ;;
 my @array2;
 while (@array1) {
   my $item = pop @array1;
   print $item;
   push(@array2,$item);
 }
 print qq{\@array2 after: (@array2)};
"
@array1 before: (ball bat helmet)
helmet
bat
ball
@array2 after: (helmet bat ball)