Hi guys,
here is my problem:
You have a class, say, called Animal. Animal has a feature called DNA, and DNA is an array. Example: 
package Animal;
# constructor
sub new {
    my $this = {};
    # object properties
    $this->{DNA} = [];

    bless $this;
    return $this;
    }

sub getDNA
    {
    my $this = shift;
    return "@{$this->{DNA}}";
    }

sub setDNA
    {
    my $this = shift;
    @{$this->{DNA}} = @_;
    return @{$this->{DNA}};
    }

[download]
Now, imagine you want to create another class, say, called Population. And you want a bag of Animals, like: 
package Population;
use Animal;

# constructor
sub new {
    my $this = {};
    # object properties
    $this->{individual} = [];

    bless $this;
    return $this;
    }

sub init {
        for ($i=0; $i<5; $i++) { 
         my $empl = Animal->new();
             $empl->setDNA(4, 6, 8, 10);
         push (@{$this->{individual}}, $empl);
    }
}

[download]
As you can see, the method init simply pushes 5 not empty Animals into a Population object.
The problem is that I'm not able to access them! What I should do if I want, say, set the DNA of a specific Animal of the Population?
And what if want to get or set a specific value of a specific slot of the DNA of an Animal...? I lack the knowledge I need. I tryied in many ways. Just an example, if I want to get the DNA of the Animal in the first slot: 
sub getTheFirst{
    my $this = shift;
    return @{$this->{individual}}[0]->getDNA();
}

[download]
But of course it's not working.
I can't get what I want...

In reply to arrays of object in OO perl by IL_MARO

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