How do you like this approach: 
sub someFunc {
  my @args = qw( client_number MM DD S );  # no commas here
  for (@args) {
    $_ = defined($_[0]) ? shift : die "$_ not defined";
  }
  # hooray
}

[download]
Hey, you could even use a pseudohash so you can use the names instead of indices: 
sub someFunc {
  my $args = [
    { client_number => 1, MM => 2, DD => 3, S => 4, },
  ];
  for (keys %$args) {
    my $idx = $args->[0]{$_} - 1;
    if (defined $_[$idx]) { $args->{$_} = $_[$idx], next }
    die "$_ not defined";
  }
  # hooray
}

[download]


japhy -- Perl and Regex Hacker

In reply to Re: Maintaining strict refs while Binding a set of variables to @_ or dying if they are not defined by japhy
in thread Maintaining strict refs while Binding a set of variables to @_ or dying if they are not defined by princepawn

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