When one object needs to notify many other objects about changes in its state automatically, the Observer Pattern steps in. What is the Observer Pattern? Defines a one to many dependency between...

When you want to create families of related objects without specifying their concrete classes, the Abstract Factory Pattern is your best friend. What is the Abstract Factory Pattern? Provides an...

Factory Pattern Imagine you want to create objects — but you don't want to expose the creation logic to the client and instead ask a factory class to create objects for you. That's exactly what the...

When you want to add new functionalities to an object without modifying its structure, the Decorator Pattern comes to the rescue. The Decorator Pattern lets you dynamically wrap objects with new...

Sometimes you don't want or can't allow direct access to an object. Maybe it's expensive to create, needs special permissions, or you want to control access in some way. This is where the Proxy...

Ever found yourself writing similar logic over and over, only to change a few steps each time? That’s exactly what the Template Pattern helps you solve. The Template Pattern is a behavioral design...

Ever needed to connect two incompatible interfaces without changing their source code? That’s exactly where the Adapter Pattern shines! The Adapter Pattern is a structural design pattern that allows...

Ever needed just one instance of a class in your application? Maybe a logger, a database connection, or a configuration manager? This is where the Singleton Pattern comes in — one of the simplest but...