#!/usr/bin/perl
use warnings;
use strict;
my @a = qw(a b c);
my $aref = \@a;
push($aref, "d");
for my $i (@a) {
    print "$i\n";
}

Experimental push on scalar is now forbidden at ...

#!/usr/bin/perl

use warnings;
use strict;

package Bag {

    sub new {
        my $classname = shift;
        my $self = {fruits => ["apple", "strawberry"]};
        return bless($self, $classname);
    }

    sub pushOnRef {
        # Geht das nicht besser?
        my $self = shift;
        my $ref = shift;
        my $val = shift;
        my @temp = @{$ref};
        push(@temp, $val);
        $ref = \@temp;
        return $ref;
    }

    sub addFruit {
        my $self = shift;
        my $fruit = shift;
        $self->{fruits} = $self->pushOnRef($self->{fruits}, $fruit);
    }

    sub show {
        my $self = shift;
        my @f = @{ $self->{fruits} };
        print "\n";
        for my $i (@f) {
            print "$i\n";
        }
        print "\n";
    }

}

my $bag = Bag->new();
$bag->addFruit("banana");
$bag->show();