Categories and Extensions

A category allows you to add methods to an existing class—even to one to which you do not have the source. This is a powerful feature that allows you to extend the functionality of existing classes without subclassing.

Class Objects

This information is compiled and recorded in data structures made available to the runtime system. The compiler creates just one object, a class object, to represent the class. The class object has access to all the information about the class...

Introduction to The Objective-C 2.0 Programming Language

An object-oriented approach to application development makes programs more intuitive to design, faster to develop, more amenable to modification, and easier to understand. Most object-oriented development environments consist of at least three parts:

Defining a Class

Much of object-oriented programming consists of writing the code for new objects—defining new classes. In Objective-C, classes are defined in two parts: An interface that declares the methods and instance variables of the class and names its superclass An implementation that actually defines the class (contains the code that implements its methods)

Depuración de una DLL ActiveX desde ASP

Aquí están los pasos necesarios para depurar nuestro código en Visual Basic encapsulado en un componente, mientras ejecutamos nuestra aplicación web. Método descubierto tras arduos intentos y mucha investigación, ya que Microsoft nunca ha dado mucha documentación sobre el tema.

Estructuras de Oracle: Tablespaces

Artículo con conceptos básicos sobre la base de datos Oracle.