Refactoring: Improving the Design of Existing Code

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Addison-Wesley, 09.03.2012 - 455 Seiten
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As the application of object technology--particularly the Java programming language--has become commonplace, a new problem has emerged to confront the software development community. Significant numbers of poorly designed programs have been created by less-experienced developers, resulting in applications that are inefficient and hard to maintain and extend. Increasingly, software system professionals are discovering just how difficult it is to work with these inherited, "non-optimal" applications. For several years, expert-level object programmers have employed a growing collection of techniques to improve the structural integrity and performance of such existing software programs. Referred to as "refactoring," these practices have remained in the domain of experts because no attempt has been made to transcribe the lore into a form that all developers could use. . .until now. In Refactoring: Improving the Design of Existing Code, renowned object technology mentor Martin Fowler breaks new ground, demystifying these master practices and demonstrating how software practitioners can realize the significant benefits of this new process.

 

With proper training a skilled system designer can take a bad design and rework it into well-designed, robust code. In this book, Martin Fowler shows you where opportunities for refactoring typically can be found, and how to go about reworking a bad design into a good one. Each refactoring step is simple--seemingly too simple to be worth doing. Refactoring may involve moving a field from one class to another, or pulling some code out of a method to turn it into its own method, or even pushing some code up or down a hierarchy. While these individual steps may seem elementary, the cumulative effect of such small changes can radically improve the design. Refactoring is a proven way to prevent software decay.

 

In addition to discussing the various techniques of refactoring, the author provides a detailed catalog of more than seventy proven refactorings with helpful pointers that teach you when to apply them; step-by-step instructions for applying each refactoring; and an example illustrating how the refactoring works. The illustrative examples are written in Java, but the ideas are applicable to any object-oriented programming language.

 

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LibraryThing Review

Nutzerbericht  - jsburbidge - LibraryThing

This is the book that moved refactoring from the focus of a narrow community to a general concept. Illuminating, well-written, and helpful, it strikes an effective balance between the concrete and the ... Vollständige Rezension lesen

LibraryThing Review

Nutzerbericht  - brikis98 - LibraryThing

Pros: presenting refactoring as a regular part of the development process is an important step forward. The example at the start of the book is a great demonstration if why this stuff matters. Nice to ... Vollständige Rezension lesen

Inhalt

Refactoring a First Example
1
Principles in Refactoring
53
Bad Smells in Code by Kent Beck and Martin Fowler
75
Building Tests
89
Toward a Catalog of Refactorings
103
Composing Methods
109
Moving Features Between Objects
141
Organizing Data
169
Dealing with Generalization
319
Big Refactorings by Kent Beck and Martin Fowler
359
Refactoring Reuse and Reality by William Opdyke
379
Refactoring Tools by Don Roberts and John Brant
401
Putting It All Together by Kent Beck
409
References
413
List of Soundbites
417
Index
419

Simplifying Conditional Expressions
237
Making Method Calls Simpler
271

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Über den Autor (2012)

Martin Fowler is the Chief Scientist of ThoughtWorks, an enterprise-application development and delivery company. He's been applying object-oriented techniques to enterprise software development for over a decade. He is notorious for his work on patterns, the UML, refactoring, and agile methods. Martin lives in Melrose, Massachusetts, with his wife, Cindy, and a very strange cat. His homepage is http://martinfowler.com.

Kent Beck consistently challenges software engineering dogma, promoting ideas like patterns, test-driven development, and Extreme Programming. Currently affiliated with Three Rivers Institute and Agitar Software, he is the author of many Addison-Wesley titles.

John Brant and Don Roberts are the authors of the Refactoring Browser for Smalltalk, which is found at http://st-www.cs.uiuc.edu/~brant/RefactoringBrowser/. They are also consultants who have studied both the practical and theoretical aspects of refactoring for six years.

William Opdyke's doctoral research on refactoring object-oriented frameworks at the University of Illinois led to the first major publication on this topic. He is currently a Distinguished Member of Technical Staff at Lucent Technologies/Bell Laboratories.

John Brant and Don Roberts are the authors of the Refactoring Browser for Smalltalk, which is found at http://st-www.cs.uiuc.edu/~brant/RefactoringBrowser/. They are also consultants who have studied both the practical and theoretical aspects of refactoring for six years.



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