Trying to merge two polygon classes... (OOP help)

[hkvzjal]

@vmagnin

A last question concerning the attribute:
, pass(self) ::
I read it was not necessary if self is the first argument of a procedure. But if you however write it, I imagine there is a reason in the general case?

Yes, if you make sure that the object is your first argument the default behavior is as if you wrote pass(self), so you can avoid it! writting it down would be more a matter of explicitness.