if ( defined ?attr1Hash{$attr1}){
      my $key ="attr1.attr2.attr3";
      $arrayRef = $fullHash{$key};
   }

[download]
You don't need to build your own keys wtih perl's multidimensional array emulation:
  $arrayRef = $fullHash{$attr1,$attr2,$attr3};

[download]
See perlvar

In reply to Re: Hash space/ time tradeoff by runrig
in thread Hash space/ time tradeoff by Wiggins

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