Here a cleaner and more generalized version, also closer to Schwartzian transform

use strict;
use warnings;
use Data::Dump qw/pp dd/;


# --- input data

my @sorted_data =
  (
   {
    'count_payment' => '',
    'count_banking' => '31 (62.00)',
    'name' => 'Parking Eye [LTD] One',
   },
   {
    'count_payment' => '10 (144.00)',
    'count_banking' => '',
    'name' => 'Parking Eye [LTD] Two',
   },
   {
    'count_payment' => '2 (80.42)',
    'count_banking' => '',
    'name' => 'Parking Eye [LTD] Three',
   },
   {
    'count_payment' => '',
    'count_banking' => '4 (982.00)',
    'name' => 'Parking Eye [LTD] Two',
   }
  );



# --- join elements into temporary hash by name
my %by_name;
my $order = 0;

for my $record (@sorted_data) {

    my $name = $record->{name};

    # create new hash only if $name unknown
    $by_name{$name} //=
      {
       hsh => { name   => $name },
       ord => $order++,               # preserve original order
      };

    # concat other elements
    for my $field ( keys %$record ) {
        next if $field eq 'name';
        $by_name{$name}{hsh}{$field} .= $record->{$field};
    }

}


# --- copy hash values by order (Schwartzian transform)

my @new_sorted_data =
  map  { $_->{hsh} }
  sort { $a->{ord} <=> $b->{ord} }
  values %by_name;


# --- dump result
pp \@new_sorted_data;

[download]

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re^5: How to merge two arrays within the hash of arrays based on unique name. by LanX
in thread How to merge two arrays within the hash of arrays based on unique name. by Sami_R

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