Jay Fields是DRWcTrading公司的一名軟件程序員，也是一位研討會的常客。Jay 對發現和成熟化創新式解決方案總是抱有激情，Jay 的個人網站是：www.jayfields.com。

Shane Harvie 在美國、印度和澳大利亞等國的敏捷公司中從事軟件開發工作。他現在位於芝加哥的DRW Trading公司工作，個人網站是：www.shaneharvie.com。

Martin Fowler是ThoughtWorks公司的首席科學傢，他是一位作傢、演說傢和谘詢師，經常在軟件開發活動中發錶演講，他關注的是企業軟件設計——諸如什麼能産生良好的設計，而良好的設計又需要哪些實踐等。他是麵嚮對象技術、重構、模式、敏捷方法論、領域建模、統一建模語言（UML）和極限編程的先行者，近十年來他一直在 ThoughtWorks公司工作，這是一傢非常齣色的係統開發和谘詢公司。

The Definitive Refactoring Guide, Fully Revamped for Ruby With refactoring, programmers can transform even the most chaotic software into well-designed systems that are far easier to evolve and maintain. What,s more, they can do it one step at a time, through a series of simple, proven steps. Now, there,s an authoritative and extensively updated version of Martin Fowler,s classic refactoring book that utilizes Ruby examples and idioms throughout-not code adapted from Java or any other environment. The authors introduce a detailed catalog of more than 70 proven Ruby refactorings, with specific guidance on when to apply each of them, step-by-step instructions for using them, and example code illustrating how they work. Many of the authors, refactorings use powerful Ruby-specific features, and all code samples are available for download. Leveraging Fowler,s original concepts, the authors show how to perform refactoring in a controlled, efficient, incremental manner, so you methodically improve your code,s structure without introducing new bugs. Whatever your role in writing or maintaining Ruby code, this book will be an indispensable resource. This book will help you * Understand the core principles of refactoring and the reasons for doing it * Recognize "bad smells" in your Ruby code * Rework bad designs into well-designed code, one step at a time * Build tests to make sure your refactorings work properly * Understand the challenges of refactoring and how they can be overcome * Compose methods to package code properly * Move features between objects to place responsibilities where they fit best * Organize data to make it easier to work with * Simplify conditional expressions and make more effective use of polymorphism * Create interfaces that are easier to understand and use * Generalize more effectively * Perform larger refactorings that transform entire software systems and may take months or years * Successfully refactor Ruby on Rails code