Hi Folks, I have a package as in:
package Library;

sub new {
    my ($class, $fname) = @_;
    my $self = {
    library => undef
    };
    bless $self, $class;

    my $lib     = Data::Container->new();
    my $libfile = Data::File->new($fname);
    $lib->read($libfile);
    
    ($self->{library}) = ($lib->get_list("library"));

    return $self;
}

sub get_list {
    my ($self, @keywords) = @_;
    return $self->{lib}->get_list(@keywords);
}

[download]

where Data::Container is another package as below:
package Data::Container;

sub new {
    my $class = shift;
    my $self = {
    line  => shift,
    items => undef,
    close => undef,
    };
    $self->{line} = "" unless $self->{line};
    bless $self, $class;
}

[download]

and similarly, Data::File is another package as below:
package Data::File;

sub new {
    my $class = shift;
    my $self = {
    file => iFile->new(shift)
    };
    bless $self, $class;
}

[download]

Note that the above code does not contain the methods (I excluded them for making my post to be compact).
In the above code, in the package Library, I have the line
($self->{library}) = ($lib->get_list("library"));

If I do not use the paranthesis like above and have instead:
$self->{library} = $lib->get_list("library"); I get an error.

Please excuse if this is a very basic question...but why do I need to use the ($self->{library}) = ($lib->get_list("library")); instead of $self->{library} = $lib->get_list("library"); to make my program work?
--Jessica

In reply to A new user question on OO Perl by noobee

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