Design Patterns Guide

Design patterns are reusable solutions to common problems in software design. They help in making software more maintainable, scalable, and efficient.

Creational Patterns

These patterns focus on object creation mechanisms, providing ways to create objects in a manner suitable to the situation.

Singleton: Ensures a class has only one instance and provides a global point of access to it.
Factory Method: Defines an interface for creating an object but lets subclasses alter the type of objects that will be created.
Abstract Factory: Creates an instance of several related or dependent objects without specifying their concrete classes.

Structural Patterns

These patterns deal with the composition of classes and objects to form larger structures.

Adapter: Allows objects with incompatible interfaces to collaborate.
Bridge: Separates an abstraction from its implementation so that the two can vary independently.
Composite: Composes objects into tree structures to represent part-whole hierarchies.

Behavioral Patterns

These patterns focus on communication between objects.

Observer: Defines a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.
Strategy: Defines a family of algorithms, encapsulates each one, and makes them interchangeable.
Template Method: Defines the program skeleton of an algorithm in a method, deferring some steps to subclasses.

For more detailed information on design patterns, check out our advanced design patterns guide.