#!/usr/bin/perl -w
# AoH_count.pl --- Perlmonks: Counting elements in array of cases
# Link:    https://perlmonks.org/?node_id=11106779
# Author:  <LanX>
# Created: 27 Sep 2019
# Version: 0.01

use warnings;
use strict;
use List::Util qw/uniq/;
use Test::More;
#use Data::Dump qw/pp/;

my @AoH = (
	{'targetL' => 'foisonnement', 'origin' => 'AMG', 'count' => '1'},
	{'targetL' => 'foisonnement', 'origin' => 'IDBR', 'count' => '1'},
	{'targetL' => 'gonfler', 'origin' => 'IWWF', 'count' => '1'},
	{'targetL' => 'due', 'origin' => 'IWWF', 'count' => '1' },
	{'targetL' => 'due', 'origin' => 'IWWF', 'count' => '1' },
);

my @AoHfinal;
my %count;
my %origin;
my @order;

for my $h (@AoH) {
    my $target = $h->{targetL};
    push @order, $target
        unless exists $count{$target};  
    $count{ $target }++;
    push @{ $origin{$target} }, $h->{origin};
}

#pp '\%count,\%origin,\@order: ', \%count,\%origin,\@order;

for my $target ( @order ) {
    push @AoHfinal,
        {
            targetL => $target,
            origin  => join ( " ", uniq @{ $origin{$target} } ),
            count   => $count{$target},
        };
}


#pp '\@AoHfinal: ', \@AoHfinal;


is_deeply \@AoHfinal, [
	{'targetL' => 'foisonnement','origin' => 'AMG IDBR','count'=>'2'},
	{'targetL' => 'gonfler','origin' => 'IWWF','count' => '1'},
	{'targetL' => 'due','origin' => 'IWWF','count' => '2'},
] or diag explain \@AoHfinal;

done_testing;