I don't know what PBP has to say on the matter, as its one of the few Perl books I haven't bought. But...
sub new {
my $self = shift;
bless \( my $scalar ), ref $self || $self;
}
Is better written as
sub new {
my $class = shift;
bless \( my $scalar ), $class;
}
You don't normally get a blessed reference passed into new(). If you're using
my $foo = Object::Foo->new, or something similar, its the name of the class (Object::Foo in my example) that's passed into new(). So,
my $class = shift; is more logical.
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