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Object-Oriented Programming with CLOS: A Hands-On Introduction to Classes, Methods, and Generic Functions in Common Lisp
Paperback
Publisher: Independently Published
Published: Oct 6 2025
Pages: 150
Weight: 0.55
Height: 0.32 Width: 6.69 Depth: 9.61
Language: English
Have you ever looked at Lisp's object system and felt intimidated? You've seen defclass and defmethod, but the philosophy behind them feels just out of reach. You understand functions, but you want to build larger, more organized systems where data and behavior are elegantly connected.
This book changes everything. Imagine moving from confusion to clarity, starting with a simple idea-an object-and methodically building on it until you see the entire, beautiful picture. We won't just talk about theory; we'll put it into practice immediately. You will be guided through the process of building a complete text-based adventure game from the ground up, applying each new concept as you learn it. You will see firsthand how a system of simple, cooperating objects can grow into a dynamic and extensible program. This isn't just a book; it's the journey to becoming a more powerful and thoughtful programmer.
Inside, you will discover a project-based curriculum that makes learning CLOS intuitive and rewarding. You will:
- Master the Fundamentals: Get a rock-solid understanding of defclass, defmethod, make-instance, and the powerful slot options that give you fine-grained control over your objects.
- Structure Your Code Logically: Learn to use single and multiple inheritance effectively to create clean, reusable, and easy-to-understand class hierarchies.
- Unlock Advanced Techniques: Go beyond the basics to explore multimethods and the different roles of auxiliary methods (: before: after: around) in standard method combination.
- Build a Complete Project: Apply everything you've learned by creating a fully functional text adventure game, from initial design to the final, playable game loop.
- Peek Behind the Curtain: Receive a gentle but insightful introduction to the concepts of the Metaobject Protocol (MOP), understanding what makes CLOS uniquely programmable.
This book is for you if:
- You are a Lisp programmer who has focused on the functional side and now wants to confidently add object-oriented design to your toolkit.
- You are a developer coming from Python, Java, Ruby, or C++ and are curious to see what a truly dynamic and flexible object system can do.
- You are a student or self-learner who wants a practical, hands-on introduction to a powerful programming paradigm that will change the way you think about software design.
Stop just writing functions; start building systems. Move beyond the syntax and learn the art of creating elegant, object-oriented programs. If you're ready to unlock a new level of power and expressiveness in your code, then this book is your next step.
Begin your journey into the Common Lisp Object System today!
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