Summary
This chapter covers design patterns, which are reusable, proven strategies for solving common software design challenges to achieve scalable, maintainable, and easily communicated code.

General domain of usage
Large-scale software development

Design patterns are **reusable solutions** to common problems that arise in software design. They provide **templates** for solving recurring challenges in code structure and object collaboration.

Definition

Inspired by architectural patterns in construction, design patterns in programming encapsulate proven strategies that promote **scalable** and **maintainable** code, helping developers avoid reinventing the wheel for familiar design challenges.
Here's a quick comparison example showing how a situation can be improved using a design pattern.

By leveraging **design patterns**, you can avoid code duplication and significantly improve communication among developers. Patterns provide a shared vocabulary: when you refer to a `Singleton` or `Factory Method`, other developers immediately understand the intent and structure of your solution. This common language reduces misunderstandings and accelerates development. Furthermore, patterns help you organize code in ways that make it easier to extend, refactor, or troubleshoot, ultimately supporting long-term project health and team productivity.

What is a design pattern and its main benefit

A hands-on, real-world focused course on advanced design patterns in C++. Learn to implement, refactor, and test maintainable solutions using modern C++23, with practical coding tasks and unit tests.

Understand what design patterns are, their importance in software engineering, and how they are classified. Practice refactoring code using a suitable pattern.

Implement and apply key creational patterns in C++: Singleton, Factory Method, and Builder. Practice with real-world inspired coding tasks.

Apply structural patterns to organize code and manage relationships between objects: Adapter, Decorator, and Composite. Practice with practical coding tasks.

Explore advanced behavioral patterns for managing object interactions and responsibilities. Practice with real-world inspired coding tasks.

What Are Design Patterns?

What Are Design Patterns?