Just push onto the correct sex which items you want from the original AoH.

use strict;
use warnings;

use Data::Dumper;

my @data = (
   {
       id   => q{1},
       name => q{Tom},
       sex  => q{Male},
   }, 
   {
       id   => q{2},
       name => q{Harry},
       sex  => q{Male},
   }, 
   {
       id   => q{3},
       name => q{Pam},
       sex  => q{Female},
   }, 
   {
       id   => q{4},
       name => q{Dick},
       sex  => q{Male},
   }
   );

my $rhBySex = { Male => [], Female => [] };

push @{ $rhBySex->{ $_->{ sex } } },
   { name => $_->{ name }, id => $_->{ id } }
   for @data;

print Data::Dumper->Dumpxs( [ $rhBySex ], [ qw{ rhBySex } ] );

[download]

Produces

$rhBySex = {
             'Female' => [
                           {
                             'id' => '3',
                             'name' => 'Pam'
                           }
                         ],
             'Male' => [
                         {
                           'name' => 'Tom',
                           'id' => '1'
                         },
                         {
                           'id' => '2',
                           'name' => 'Harry'
                         },
                         {
                           'id' => '4',
                           'name' => 'Dick'
                         }
                       ]
           };

[download]

I hope this is helpful.

Cheers,

JohnGG

In reply to Re: How to filter few key value pairs from hash reference by johngg
in thread How to filter few key value pairs from hash reference by jaypal

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