Design Patterns Guide

Design patterns are reusable solutions to common problems in software design. They are essential for writing maintainable, scalable, and efficient code. In this guide, we will explore some of the most important design patterns and their applications.

Creational Patterns

Creational patterns focus on object creation mechanisms, providing flexibility in creating objects.

Singleton Pattern: Ensures a class has only one instance and provides a global point of access to it.
Factory Method Pattern: Defines an interface for creating an object but lets subclasses alter the type of objects that will be created.
Abstract Factory Pattern: Creates families of related or dependent objects.

Structural Patterns

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

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

Behavioral Patterns

Behavioral patterns focus on communication between objects.

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

Resources

For more in-depth information on design patterns, you can refer to our comprehensive Design Patterns Tutorial.