This is the best that I've managed so far: 
while (($k, $lref) = each %HoL){
  $HoL{$k}={map {$_,1} @$lref};
}

[download]
I tried to get something along the lines of the following bit of code to work but couldn't: 
%HoL=map {map {$_,1} @HoL{$_}} keys %HoL;

[download]
I'm sure merlyn could blow this out of the water (and I hope he does, I'd love to see his solution... probably something really slick w/ 2 maps)

In reply to Re: hash of lists - hash of hashes by lhoward
in thread hash of lists - hash of hashes by visnu

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