The following is the format which i am getting from
'$testsub->result()' method using Data::Dumper.
$VAR1 = [
          {
            'columns' => [
                           {
                             'test' => '87588',
                             'test1' => '87588',
                             'test2' => '0'
                           },
                           {
                             'test' => '87588',
                             'test1' => '87588',
                             'test2' => '0'
                           },
                       ]
          }
        ];

[download]
and i am using the following code to get the total
value of 'test1'. 
  map {
      map{ $total_value += $_->{test1} ; } @{$_->{columns}};
    } @{$testsub->result()}; 
      }

[download]
Is there any method to avoid double looping?.

In reply to how to avoid nested looping? by lamp

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