Dynamic Binding

Dynamic binding is a programming concept where the method or function to be executed is determined at runtime rather than compile-time, based on the actual type of the object. It enables polymorphism in object-oriented programming, allowing different objects to respond to the same method call in their own specific ways. This is often implemented through mechanisms like virtual functions in C++ or method overriding in languages like Java and Python.

Also known as: Late Binding, Runtime Binding, Dynamic Dispatch, Virtual Method Invocation, Polymorphic Binding

Why learn Dynamic Binding?

Developers should learn dynamic binding to implement flexible and extensible software designs, particularly in object-oriented systems where behavior needs to vary based on object types. It is essential for use cases such as creating plugin architectures, handling diverse data types in collections, and building frameworks that support user-defined subclasses. For example, in a graphics application, dynamic binding allows different shape objects (e.g., circles, squares) to have their own 'draw' methods called appropriately without explicit type checks.

Learning Resources

• tutorial: GeeksforGeeks: Dynamic Binding in Java
• docs: MDN Web Docs: Inheritance and the prototype chain
• tutorial: C++ Virtual Functions and Polymorphism
• tutorial: Python Method Resolution Order
• book: Book: 'Design Patterns: Elements of Reusable Object-Oriented Software' by Gamma et al.