sub menu { 
  my ($title, @option) = @{shift(@_)}; 
  my (@name, @action); 
 
  ($name[@name], $action[@action]) = splice @option, 0, 2 
     while @option; 
 
    while(1) { 
      print "\n$title\n"; 
      print map "$_. $name[$_ - 1]\n", 1 .. @name; 
      print '> '; 
 
      chomp (my $choice = readline *STDIN); 
      if ($choice and $choice > 0 and $choice <= @action) { 
        my $do_action = $action[$choice-1]; 
 
        return unless defined $do_action; 
        $do_action->() if 'CODE' eq ref $action[$choice-1]; 
        menu($action[$choice-1]) if 'ARRAY' eq ref $action[$choice-1];
+ 
      } else { 
          print "Invalid choice: $choice\n" 
      } 
  } 
}
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