Hash slices might be what you need. This is an example of how they work demonstrated under the Perl debugger: 
  DB<1>  @hash{qw/one two three/} = qw /1 2 3/;

  DB<2> x \%hash
0  HASH(0x302ee308)
   'one' => 1
   'three' => 3
   'two' => 2
  DB<3>

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In reply to Re^3: Request help on optimizing a loop for looking up numbers by Laurent_R
in thread Request help on optimizing a loop for looking up numbers by VincentK

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