c:\@Work\Perl\monks>perl -wMstrict -MData::Dumper -le
"my $data = [
   { Ad1 => '20 SOUTH CENTRAL  #B3', status => 'Property', City => 'NY', zCode => '0002', name => 'John D' },
   { Ad1 => '15 SOUTH CENTRAL  #B4', status => 'Property', City => 'NY', zCode => '0002', name => 'John V' },
   { Ad1 => '100 main St.',          status => 'houses',   City => 'BO', zCode => '0007', name => 'Mary'   },
   ];
 ;;
 my %last_houses;
 ;;
 foreach my $hr_row (@$data) {
   if ($hr_row->{ 'status' } eq 'houses') {
     @last_houses  { qw(new_name  new_ad1  new_City  new_z_code) } =
       @{ $hr_row }{ qw(name      Ad1      City      zCode     ) };
     }
   }
 ;;
 foreach my $hr_row (@$data) {
   %$hr_row = (%$hr_row, %last_houses);
   }
 ;;
 print Dumper $data;
"
$VAR1 = [
          {
            'new_City' => 'BO',
            'status' => 'Property',
            'name' => 'John D',
            'City' => 'NY',
            'Ad1' => '20 SOUTH CENTRAL  #B3',
            'new_ad1' => '100 main St.',
            'new_z_code' => '0007',
            'zCode' => '0002',
            'new_name' => 'Mary'
          },
          {
            'new_City' => 'BO',
            'status' => 'Property',
            'name' => 'John V',
            'City' => 'NY',
            'Ad1' => '15 SOUTH CENTRAL  #B4',
            'new_ad1' => '100 main St.',
            'new_z_code' => '0007',
            'zCode' => '0002',
            'new_name' => 'Mary'
          },
          {
            'new_City' => 'BO',
            'status' => 'houses',
            'name' => 'Mary',
            'City' => 'BO',
            'Ad1' => '100 main St.',
            'new_ad1' => '100 main St.',
            'new_z_code' => '0007',
            'zCode' => '0007',
            'new_name' => 'Mary'
          }
        ];

##</code><code>##

my $data = [
  { Ad1 => '20 SOUTH CENTRAL  #B3', status => 'Property', City => 'NY', zCode => '0002', name => 'John D' },
  { Ad1 => '15 SOUTH CENTRAL  #B4', status => 'Property', City => 'NY', zCode => '0002', name => 'John V' },
  { Ad1 => '100 main St.',          status => 'houses',   City => 'BO', zCode => '0007', name => 'Mary'   },
  { Ad1 => '13 Terminal St.',       status => 'houses',   City => 'LA', zCode => '6664', name => 'Larry'  },
  ];