4.1. How it Works behind the Scenes

An object is basically a reference to a hash where the hash members are the object member variables. That reference is "blessed" to be associated with a module. Whenever the programmer makes a method call, the methods are being searched starting from that module. That module is the object's class.

Method calls in perl are done using the $object_ref->method_name(@args) notation. Note that in Perl, passing the object reference is done explicitly and it is the first argument passed to the function.