It's the fact that it's not making copies, it is making aliases. The subroutine's aliasing is another layer, but the fact that 'x' doesn't make copies is the primary thing here.
_____________________________________________________
Jeff
japhy Pinyan,
P.L., P.M., P.O.D, X.S.:
Perl,
regex,
and
perl
hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart