If you use splice you'll get something that works OK:

my @a = qw/v0 v1 v2 v3 v4 v5/;
while ( $#a >= 0 )
{
  print "Directive: " . join ( " ", splice ( @a, 0, 4 ) ) . "\n";
}
[download]

The groovy part about this is that if the array's empty, nothing prints.

--t. alex

"Here's the chocolates, and here's the flowers. Now how 'bout it, widder hen, will ya marry me?" --Foghorn Leghorn

Update Well, mdillon remembered the map munge() part and I didn't. ++ to him.