If you are referring to How can I use a reference as a hash key?, I don't see your point.

Inside an anonymous hash or in a 'flat' list, a hash reference (or any reference) will just get stringized away if you try to use it as a hash key (unless you invoke some other magic). 

>perl -wMstrict -le
"sub func {
   my %args = @_;
   print keys %args
   }
 func({ bar => 'baz' } => 'foo');
 func({ fee => 'fie' } ,  'foe');
"
HASH(0x225398)
HASH(0x225398)

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In reply to Re^4: Preferred technique for named subroutine parameters? by AnomalousMonk
in thread Preferred technique for named subroutine parameters? by Anonymous Monk

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