Dynamic Method Calls

Dynamic method calls are a programming technique where a method is invoked at runtime based on a string or variable that specifies its name, rather than being hardcoded in the source code. This allows for flexible and adaptable code that can respond to changing conditions or user inputs. It is commonly used in languages with reflection capabilities, such as Python, Ruby, and JavaScript, to implement features like plugins, event handling, or dynamic dispatch.

Also known as: Dynamic Dispatch, Reflective Method Invocation, Runtime Method Calling, send() method, getattr()

Why learn Dynamic Method Calls?

Developers should learn dynamic method calls when building applications that require runtime flexibility, such as plugin systems, command-line interfaces, or frameworks that need to handle unknown methods. For example, in a web application, dynamic method calls can be used to route HTTP requests to controller methods based on URL parameters, enabling clean and scalable code. It is also essential for metaprogramming tasks, where code needs to generate or modify itself during execution.

Learning Resources

• docs: Python Documentation: getattr()
• docs: MDN Web Docs: Function.prototype.call()
• tutorial: Ruby Guides: Dynamic Methods
• tutorial: Java Reflection Tutorial
• video: YouTube: Dynamic Method Calls in JavaScript