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Clean Code: A Handbook of Agile Software Craftsmanship (Robert C. Martin Series) Paperback – 1 Aug. 2008

4.6 out of 5 stars 6,415 ratings

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Even bad code can function. But if code isn’t clean, it can bring a development organization to its knees. Every year, countless hours and significant resources are lost because of poorly written code. But it doesn’t have to be that way. Noted software expert Robert C. Martin presents a revolutionary paradigm with Clean Code: A Handbook of Agile Software Craftsmanship . Martin has teamed up with his colleagues from Object Mentor to distill their best agile practice of cleaning code “on the fly” into a book that will instill within you the values of a software craftsman and make you a better programmer—but only if you work at it. What kind of work will you be doing? You’ll be reading code—lots of code. And you will be challenged to think about what’s right about that code, and what’s wrong with it. More importantly, you will be challenged to reassess your professional values and your commitment to your craft. Clean Code is divided into three parts. The first describes the principles, patterns, and practices of writing clean code. The second part consists of several case studies of increasing complexity. Each case study is an exercise in cleaning up code—of transforming a code base that has some problems into one that is sound and efficient. The third part is the payoff: a single chapter containing a list of heuristics and “smells” gathered while creating the case studies. The result is a knowledge base that describes the way we think when we write, read, and clean code. Readers will come away from this book understanding How to tell the difference between good and bad code How to write good code and how to transform bad code into good code How to create good names, good functions, good objects, and good classes How to format code for maximum readability How to implement complete error handling without obscuring code logic How to unit test and practice test-driven development This book is a must for any developer, software engineer, project manager, team lead, or systems analyst with an interest in producing better code.

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From the Publisher

A Handbook of Agile Software Craftsmanship
Practical Advice for the Professional Programmer
A Craftsman's Guide to Software Structure and Design
Professionalism, Pragmatism, Pride
Agile values and principles for a whole new generation of developers
Customer Reviews
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4.6 out of 5 stars 2,195
4.6 out of 5 stars 3,773
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4.6 out of 5 stars 604
Price £33.50 £33.23 £26.80 £26.59 £24.80
Core Concept Best agile practices of cleaning code “on the fly” that will instill within you the values of a software craftsman and make you a better programmer—but only if you work at it. Robert C. Martin introduces the disciplines, techniques, tools, and practices of true software craftsmanship. This book is packed with practical advice–about everything from estimating and coding to refactoring and testing. Uncle Bob presents the universal rules of software architecture that will help you dramatically improve developer productivity throughout the life of any software system. Sandro Mancuso helped found the world’s largest organization of software craftsmen; now, he shares what he’s learned through inspiring examples and pragmatic advice you can use in your company, your projects, and your career. As with his other books, Martin's Clean Agile: Back to Basics doesn't merely present multiple choices and options, and say "use your best judgment"; it tells you what choices to make and why those choices are critical to your success.
Endoresement "It is the best pragmatic application of Lean principles to software I have ever seen in print." —James O. Coplien, Founder of the Pasteur Organizational Patterns project “Read, learn, and live the lessons in this book and you can accurately call yourself a software professional.” —George Bullock Senior Program Manager Microsoft Corp. "A good architecture comes from understanding it more as a journey than as a destination, more as an ongoing process of enquiry than as a frozen artifact." -- Kevlin Henney "If you are the type of programmer, team lead, or manager who craves to be able to go home after a long day of work, look in the mirror, and say, 'Damn, I did a good job today!' then this is the book for you." -- Robert C. Martin “In the journey to all things Agile, Uncle Bob has been there, done that, and has the both the t-shirt and the scars to show for it. This delightful book is part history, part personal stories, and all wisdom."

Product description

Review

Even bad code can function. But if code isn't clean, it can bring a development organization to its knees. Every year, countless hours and significant resources are lost because of poorly written code. But it doesn't have to be that way.

Noted software expert Robert C. Martin presents a revolutionary paradigm with
Clean Code: A Handbook of Agile Software Craftsmanship. Martin has teamed up with his colleagues from Object Mentor to distill their best agile practice of cleaning code “on the fly” into a book that will instill within you the values of a software craftsman and make you a better programmer―but only if you work at it.

What kind of work will you be doing? You'll be reading code―lots of code. And you will be challenged to think about what's right about that code, and what's wrong with it. More importantly, you will be challenged to reassess your professional values and your commitment to your craft.

Clean Code is divided into three parts. The first describes the principles, patterns, and practices of writing clean code. The second part consists of several case studies of increasing complexity. Each case study is an exercise in cleaning up code―of transforming a code base that has some problems into one that is sound and efficient. The third part is the payoff: a single chapter containing a list of heuristics and “smells” gathered while creating the case studies. The result is a knowledge base that describes the way we think when we write, read, and clean code.

Readers will come away from this book understanding
  • How to tell the difference between good and bad code
  • How to write good code and how to transform bad code into good code
  • How to create good names, good functions, good objects, and good classes
  • How to format code for maximum readability
  • How to implement complete error handling without obscuring code logic
  • How to unit test and practice test-driven development
This book is a must for any developer, software engineer, project manager, team lead, or systems analyst with an interest in producing better code.

--From the Back Cover

Even bad code can function. But if code isn't clean, it can bring a development organization to its knees. Every year, countless hours and significant resources are lost because of poorly written code. But it doesn't have to be that way.

Noted software expert Robert C. Martin presents a revolutionary paradigm with Clean Code: A Handbook of Agile Software Craftsmanship. Martin has teamed up with his colleagues from Object Mentor to distill their best agile practice of cleaning code “on the fly” into a book that will instill within you the values of a software craftsman and make you a better programmer―but only if you work at it.

What kind of work will you be doing? You'll be reading code―lots of code. And you will be challenged to think about what's right about that code, and what's wrong with it. More importantly, you will be challenged to reassess your professional values and your commitment to your craft.

Clean Code is divided into three parts. The first describes the principles, patterns, and practices of writing clean code. The second part consists of several case studies of increasing complexity. Each case study is an exercise in cleaning up code―of transforming a code base that has some problems into one that is sound and efficient. The third part is the payoff: a single chapter containing a list of heuristics and “smells” gathered while creating the case studies. The result is a knowledge base that describes the way we think when we write, read, and clean code.

Readers will come away from this book understanding
  • How to tell the difference between good and bad code
  • How to write good code and how to transform bad code into good code
  • How to create good names, good functions, good objects, and good classes
  • How to format code for maximum readability
  • How to implement complete error handling without obscuring code logic
  • How to unit test and practice test-driven development
This book is a must for any developer, software engineer, project manager, team lead, or systems analyst with an interest in producing better code.

--From the Back Cover

From the Back Cover

Even bad code can function. But if code isn't clean, it can bring a development organization to its knees. Every year, countless hours and significant resources are lost because of poorly written code. But it doesn't have to be that way.

Noted software expert Robert C. Martin presents a revolutionary paradigm with
Clean Code: A Handbook of Agile Software Craftsmanship. Martin has teamed up with his colleagues from Object Mentor to distill their best agile practice of cleaning code “on the fly” into a book that will instill within you the values of a software craftsman and make you a better programmer―but only if you work at it.

What kind of work will you be doing? You'll be reading code―lots of code. And you will be challenged to think about what's right about that code, and what's wrong with it. More importantly, you will be challenged to reassess your professional values and your commitment to your craft.

Clean Code is divided into three parts. The first describes the principles, patterns, and practices of writing clean code. The second part consists of several case studies of increasing complexity. Each case study is an exercise in cleaning up code―of transforming a code base that has some problems into one that is sound and efficient. The third part is the payoff: a single chapter containing a list of heuristics and “smells” gathered while creating the case studies. The result is a knowledge base that describes the way we think when we write, read, and clean code.

Readers will come away from this book understanding
  • How to tell the difference between good and bad code
  • How to write good code and how to transform bad code into good code
  • How to create good names, good functions, good objects, and good classes
  • How to format code for maximum readability
  • How to implement complete error handling without obscuring code logic
  • How to unit test and practice test-driven development
This book is a must for any developer, software engineer, project manager, team lead, or systems analyst with an interest in producing better code.

Product details

  • ASIN ‏ : ‎ 0132350882
  • Publisher ‏ : ‎ Pearson
  • Publication date ‏ : ‎ 1 Aug. 2008
  • Edition ‏ : ‎ 1st
  • Language ‏ : ‎ English
  • Print length ‏ : ‎ 464 pages
  • ISBN-10 ‏ : ‎ 9780132350884
  • ISBN-13 ‏ : ‎ 978-0132350884
  • Item weight ‏ : ‎ 784 g
  • Dimensions ‏ : ‎ 17.78 x 2.26 x 23.5 cm
  • Part of series ‏ : ‎ Robert C. Martin Series
  • Best Sellers Rank: 20,434 in Books (See Top 100 in Books)
  • Customer reviews:
    4.6 out of 5 stars 6,415 ratings

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Customers find the book excellent for learning how to develop good code and improving software quality. Moreover, the book is full of insights and advice, with one customer noting that concepts are explained accurately with plenty of examples. Additionally, customers consider the book worth its price.

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57 customers mention ‘Readability’45 positive12 negative

Customers find the book highly readable, describing it as a must-read for programmers that teaches how to develop good code and improve software quality.

"...at least adequate, code, to a form which is better factored, and easier to read, with the steps along the way clearly marked...." Read more

"...It's clearly written, easy to understand and provides code examples both good and bad to explain its practices...." Read more

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Top reviews from United Kingdom

  • Reviewed in the United Kingdom on 3 May 2009
    Every so often, a book comes along that codifies best practice in a way that manages to illuminate the path from where things are right now, to a better place that we'd rather be -- things like Fowler et al. Refactoring: Improving the Design of Existing Code (Object Technology Series) or the Gang of Four Design patterns : elements of reusable object-oriented software. This is one of those books. And if much of the material is the sort that seems obvious in hindsight -- well, that is the mark of a well written book, to make the concepts that clear.

    Taking a series of real world examples -- open source projects with significant user bases, including FitNesse and JUnit -- a series of worked examples take us from good, or at least adequate, code, to a form which is better factored, and easier to read, with the steps along the way clearly marked. Yes, even some of Kent Beck's code is put under the microscope, and carefully polished that extra stage or two more.

    The reader is cautioned that, without working long hours to follow these examples, this will be just another of those feel-good books. I don't quite agree -- spending just a little time to follow the transformations, and then reflecting on one's own outpourings should be enough to make this a feel-bad book. All the sins from obscurely named variables to sprawling functions that gaily mix abstraction levels, we've all done them (especially programming in FORTRAN on minicomputers with slow stacks and a rule of thumb that 1 call ~ 40 loc in terms of performance).

    The maxim to take from the book is based on Baden-Powell's "Try and leave this world a little better than you found it", and owes to the same school of thought as "whenever you are in the garden, pull at least one weed". The meat of the book is in distinguishing what are the weeds from the intended crop.

    So read it, understand the examples, and then refer to it often -- like the other titles mentioned, it is a reference work, and should join them as among the most thumbed on your bookshelf.
    14 people found this helpful
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  • Reviewed in the United Kingdom on 1 November 2023
    So good. So easy formulated. So useful. A lot of things are so obvious, but for some reason not many developers are following such elementary rules. Highly recommend to read, and doesn't metter if you experienced developer or just begginer. I also wish this book to be translated on indian languages. Guys, I very much like you. We are very close mentally. I have a lot of indian friends due to proffession. But, the way you coding is .... pleas, please, please - read this book.
    4 people found this helpful
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  • Reviewed in the United Kingdom on 3 December 2024
    The book was for my nephew and he loved
  • Reviewed in the United Kingdom on 27 October 2008
    This is a great book, and one which any developer will learn a great deal from. In most respects, it is a five-star book, but... the title is misleading. By rights it should be called "Clean Java Code".

    Let me explain: I am an ActionScript developer, and bought this book to improve my code style and structure. For the most part, it has done that: the chapters on naming, comments, functions and classes are absolutely superb. But then, huge swathes of the book are devoted exclusively to Java, and use some fairly complex (and, in my opinion, not very well formatted) code to convey their intention.

    I don't generally have a problem with using Java-oriented books to learn more general programming concepts (Martin Fowler's "Refactoring" and O'Reilly's Head-First Design Patterns are both books I would recommend to anyone, regardless of their language-of-choice), but around 1/3rd of Bob Martin's book is virtually impenetrable to anyone who does not already have significant Java experience.

    That said, I should re-iterate that this book will be hugely valuable to any programmer. I just wish that they had tried to use a little more pseudo-code and a little less real-world examples, with all of the complexities entailed, and I think a lot could have been done to make the Java code more readable for users of other languages.
    111 people found this helpful
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  • Reviewed in the United Kingdom on 19 April 2021
    Seriously, EVERYONE learning to code or anyone in the software engineering industry MUST read this book and learn the principles by which all programs should be made thinking on.

    I'm not saying every single principle described in the book is applicable to absolutely all scenarios, but the big majority of them are.

    Following these, will help you write cleaner code that is easier to read and understand using less mental capacity, which will in turn allows your brain to be fresher for other tasks like refactoring. It will also help in communicating more effectively with your colleagues having a common framework to work on and make easier to pass on the knowledge to other colleagues.
    One person found this helpful
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  • Alexander E.
    5.0 out of 5 stars Hat mir persönlich sehr gut gefallen
    Reviewed in Germany on 13 April 2025
    Ein Muss für jeden, der besser programmieren will – nicht nur für Anfänger

    „Clean Code“ hat mir persönlich sehr gut gefallen und ich würde es jedem empfehlen, der sich ernsthaft mit Softwareentwicklung beschäftigt – egal ob Anfänger oder erfahrener Entwickler.

    Als Ergänzung beim Programmieren lernen:
    Gerade wenn man neu ins Programmieren einsteigt, ist das Buch eine perfekte Ergänzung, weil es nicht nur zeigt, was man programmieren soll, sondern wie man es sauber und verständlich macht. Es geht weit über Syntax und Sprache hinaus und behandelt die Prinzipien guten Codes – etwas, das in vielen Kursen oft zu kurz kommt.

    Auch für Fortgeschrittene absolut lesenswert:
    Auch wenn man schon programmieren kann, lohnt sich die Lektüre. Das Buch hilft, schlechte Angewohnheiten zu erkennen und zu reflektieren, die sich im Laufe der Zeit eingeschlichen haben. Es geht dabei nicht um theoretische Regeln, sondern um praktische, nachvollziehbare Beispiele und konkrete Tipps, die man direkt umsetzen kann.

    Fazit:
    „Clean Code“ sollte jeder Programmierer kennen und gelesen haben. Es hat mir geholfen, meinen Code strukturierter, lesbarer und verständlicher zu schreiben – was nicht nur mir, sondern auch meinen Kollegen zugutekommt. Absolute Empfehlung für alle, die sauberen, wartbaren Code schreiben wollen – ein echter Klassiker der Softwareentwicklung.
    Report
  • Tones
    5.0 out of 5 stars Great for beginners dealing with legacy code
    Reviewed in Australia on 30 June 2023
    This book focuses primarily on writing software on the assumption that you're using a fully fledged OOP language. It also discusses things that could be compromised on and what absolutely shouldn't when you're time constrained.

    Use it as a guideline but don't follow it religiously. There are modern concepts that have diverged from some of the practices used in this book and for very good reason. However, if you're writing in C++, C#, or Java, then the majority of this book still applies.
  • Shakir Azimli
    5.0 out of 5 stars Java
    Reviewed in the United States on 8 May 2025
    I read the book Clean Code and really liked it. I learned how method and class names should be written, and I’ve started applying those principles in practice. It’s truly one of the most outstanding books, and every developer should read it.
  • Cliente Amazon
    5.0 out of 5 stars For software artisans with love ❤️
    Reviewed in Italy on 28 January 2025
    Un libro che ti apre la mente. Se anche tu come artigiano del software vuoi migliorare il tuo codice e la tua capacità progettuale, in termini di efficienza, manutenibilità e organizzazione del codice, questo libro fa al caso tuo.
  • Iban
    5.0 out of 5 stars No se trata de leerlo
    Reviewed in Spain on 11 June 2025
    Es un libro de lectura trivial; lo difícil es aplicar lo que nos parece buena idea en todo momento y ser consistentes con el esfuerzo.

    Yo creo que más que leérselo hay que resumirlo, tomar lo que a uno le interesa e interiorizarlo; y eso no es tan fácil como pueda parecer. Habré leído este libro al menos 3 veces, lo tengo resumido y con todo, de vez en cuando voy al resumen a la zona de malos olores y me doy cuenta de que hay cosas que en las que se puede mejorar.

    La parte de la refactorización en la que incide mucho el autor, es muy muy pesada; aunque compensa con creces el esfuerzo.