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  1. or download this
    $ perl -MData::Dumper -e ' %h1=(3 => 1, 5 => 1, 10 => 3 ); @l=%h2=reve
+rse %h1; print Dumper \@l,\%h2'
$VAR1 = [
...
          '1' => '3',
          '3' => '10'
        };
  2. or download this
    $ perl -MData::Dumper -e ' %h1=(3 => 1, 5 => 1, 10 => 3 ); @l=%h2=reve
+rse %h1; print Dumper \@l,\%h2'
$VAR1 = [
...
          '3' => '10',
          '1' => '5'
        };
  3. or download this
    $ perl -MData::Dumper -e ' %h1=(3 => 1, 5 => 1, 10 => 3 ); @l=%h2=reve
+rse %h1; print Dumper \@l,\%h2'
$VAR1 = [
...
          '1' => '3',
          '3' => '10'
        };