Readers have returned quite a bit of feedback concerning, “Abstract Classes Vs. Interfaces” from April 2001. A recurring request asks to see a complete example of using interfaces and abstract classes ...

Railroad Community Artist and Vermont Studio Center alum Rebecca Jacoby will host Abstract Art Processes, for adults and high school students, on Thursday evenings, November 6th, ...

Overview Python's "abstract base class" system gives you a way to create types that serve as the abstract foundation for another, more concrete type. This example shows how an abstract base class from ...

Abstract elementary classes (AECs) constitute a broad framework within model theory that extends classical first‐order logic, accommodating structures and theories that lie beyond its reach. By ...

Hi,<BR><BR>I have a base class whose destructor is pure virtual, so the class is abstract.<BR><BR>I have a derived class (subtype) whose multi-argument constructor wants to call the base class's zero ...