but it's looks like its optional in Perl?
Yes.
what happens when the base class is not instantiated and I call a base class method which accesses some base class properties ,through a derived object ?
If, say, the object in question is a hash, then base class will find undef instead of whatever it wanted to find, like with all other hashes.
will the method be called as a base class method or will it be called as a derived one (the first parameter sent to the method would be a base object or a derived one?
The base class will get the whole thing, 100% of it. So, in Java's terms, the base method will get the derived object.

In reply to Re^3: OOP and derived classes by Anonymous Monk
in thread OOP and derived classes by Anonymous Monk

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