in case anyone wanted something to think about instead of other work, the original (extended) problem i want to solve was to suppose those lists contained other hash keys.. so now the problem is such:

%HoL = ( bob    => [ "mary", "ken"   ],
         aditya => [ "cary", "bob"   ],
         devil  => [ "bob", "aditya" ]
       );
and i then finally want: 
%HoL = ( bob    => { mary => 1, ken => 1 },
         aditya => { cary => 1, bob => 1, mary => 1, ken => 1 },
         devil  => { bob => 1, mary => 1, ken => 1, aditya => 1, cary => 1 }
       )
so now everything shows itself readily when we use the hash, or something like that. and of course, one shouldn't get into a recursive loop, etc, blah blah blah

In reply to extended problem by visnu
in thread hash of lists - hash of hashes by visnu

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