重構

內(nèi)容概要

　　重構，一言以蔽之，就是在不改變外部行為的前提下，有條不紊地改善代碼。多年前，正是本書原版的出版，使重構終于從編程高手們的小圈子走出，成為眾多普通程序員日常開發(fā)工作中不可或缺的一部分。本書也因此成為與《設計模式》齊名的經(jīng)典著作，被譯為中、德、俄、日等眾多語言，在世界范圍內(nèi)暢銷不衰。
　　本書凝聚了軟件開發(fā)社區(qū)專家多年摸索而獲得的寶貴經(jīng)驗，擁有不因時光流逝而磨滅的價值。今天，無論是重構本身，業(yè)界對重構的理解，還是開發(fā)工具對重構的支持力度，都與本書最初出版時不可同日而語，但書中所蘊涵的意味和精華，依然值得反復咀嚼，而且往往能夠常讀常新。
　　本評注版力邀國內(nèi)資深專家執(zhí)筆，在英文原著基礎上增加中文點評與注釋，旨在以先行者的學研心得與實踐感悟，對讀者閱讀與學習加以點撥、指明捷徑。

作者簡介

Martin
Fowler世界級軟件開發(fā)大師，在面向?qū)ο蠓治鲈O計、UML、模式、XP和重構等領域都有卓越貢獻，曾任著名軟件開發(fā)咨詢公司ThoughtWorks的首席科學家。他的多部著作《分析模式》、《UML精悴》和《企業(yè)應用架構模式》等都已經(jīng)成為膾炙人口的經(jīng)典。

書籍目錄

Chapter 1 Refactoring, a First Example（新增批注共21條）
 The Starting Point
 The First Step in Refactoring
 Decomposing and Redistributing the Statement Method
 Replacing the Conditional Logic on Price Code with
Polymorphism
 Final Thoughts
Chapter 2 Principles in Refactoring（新增批注共10條）
 Defining Refactoring
 Why Should You Refactor?
 When Should You Refactor?
 What DO I Tell My Manager?
 Problems with Refactoring
 Refactoring and Design
 Refactoring and Performance
 Where Did Refactoring Come From?
Chapter 3 Bad Smells in Code (by Kent Beck and Martin
Fowler)（新增批注共17條）
 Duplicated Code
 Long Method
 Large Class
 Long Parameter List
 Divergent Change
 Shotgun Surgery
 Feature Envy
 Data Clumps
 Primitive Obsession
 Switch Statements
 Parallel Inheritance Hierarchies
 Lazy Class
 Speculative Generality
 Temporary Field
 Message Chains
 Middle Man
 Inappropriate Intimacy
 Alternative Classes with Different Interfaces
 Incomplete Library Class
 Data Class
 Refused Bequest
 Comments
Chapter 4 Building Tests（新增批注共2條）
 The Value of Self．testing Code
 The JUnit Testing Framework
 Adding More Tests
Chapter 5 Toward a Catalog of Refactorings（新增批注共1條）
 Format of the Refactorings
 Finding References
 How Mature Are These Refactorings?
Chapter 6 Composing Methods（新增批注共7條）
 Extract Method11O
 Inline Method
 Inline Temp
 Replace Temp with Query
 Introduce Explaining Variable
 Split Temporary Variable
 Remove Assignments to Parameters
 Replace Method with Method Object
 Substitute Algorithm
Chapter 7 Moving Features Between Objects（新增批注共11條）
 Move Method
 Move Field
 Extract Class
 Inline Class
 Hide Delegate
 Remove Middle Man
 Introduce Foreign Method
 Introduce Local Extension
Chapter 8 Organizing Data（新增批注共9條）
 Self Encapsulate Field
 Replace Data Value with Object
 Change Value to Reference
 Change Reference to Value
 Replace Array with Object
 Duplicate Observed Data
 Change Unidirectional Association to Bidirectional
 Change Bidirectional Association to Unidirectional
 Replace Magic Number with Symbolic Constant
 Encapsulate Field
 Encapsulate Collection
 Replace Record with Data Class
 Replace Type Code with Class
 Replace Type Code with Subclasses
 Replace Type Code with StateStrategy
 Replace Subclass with Fields
Chapter 9 Simplifying Conditional Expressions（新增批注共6條）
 Decompose Conditional
 Consolidate Conditional Expression
 Consolidate Duplicate Conditional Fragments
 Remove Contr01 Flag
 Replace Nested Conditional with Guard Clauses
 Replace Conditional with Polymorphism
 Introduce Null Object
 Introduce Assertion
Chapter 10 Making Method Calls Simpler（新增批注共13條）
 Rename Method
 Add Parameter
 Remove Parameter
 Separate Query from Modifier
 Parameterize Method
 Replace Parameter with Explicit Methods
 Preserve Whole Object
 Replace Parameter with Method
 Introduce Parameter Object
 Remove Setting Method
 Hide Method
 Replace Constructor with Factory Method
 Encapsulate Downcast
 Replace Error Code with Exception
 Replace Exception With Test
Chapter 11 Dealing with Generalization（新增批注共6條）
 Pull Up Field
 Pull Up Method
 Pull Up Constructor Body
 Push Down Method
 Push Down Field
 Extract Subclass
 Extract Superclass
 Extract Interface
 Collapse Hierarchy
 Form Template Method
 Replace Inheritance with Delegation
 Replace Delegation with Inheritance
Chapter 12 Big Refactorings (By Kent Beck and Martin
Fowler)（新增批注共11條）
 Tease Apart Inheritance
 Convert Procedural Design to Objects
 Separate Domain from Presentation
 Extract Hierarchy
Chapter 13 Refactoring, Reuse, and Reality (by William
Opdyke)（新增批注共8條）
 A Reality Check
 Why Are Developers Reluctant to Refactor Their
Programs?
 A Reality Check (Revisited)
 Resources and References for Refactoring
 Implications Regarding Software Reuse and Technology
Transfer
 A Final Note
 References
Chapter 14 Refactoring Tools (by Don Roberts and John
Brant)
 Refactoring with a Tool
 Technical Criteria for a Refactoring Tool
 Practical Criteria for a Refactoring Tool
 Wrap Up
Chapter 15 Putting It All Together (by Kent
Beck)（新增批注共2條）
References
List of Soundbites
Index

編輯推薦

Martin Fowler和本書另幾位作者清楚揭示了重構過程，他們?yōu)槊嫦驅(qū)ο筌浖_發(fā)所做的貢獻難以衡量。《重構——改善既有代碼的設計(評注版)》解釋了重構的原理和最佳實踐，并指出何時何地你應該開始挖掘你的代碼以求改善。本書的核心是一系列完整的重構方法，其中每一項都介紹一種經(jīng)過實踐檢驗的代碼變換手法的動機和技術。某些項目如Extract Method和Move Field看起來可能很淺顯，但不要掉以輕心，因為理解這類技術正是有條不紊地進行重構的關鍵。本書所提的這些重構手法將幫助你一次一小步地修改你的代碼，這就減少了過程中的風險。很快你就會把這些重構手法和其名稱加入自己的開發(fā)詞典中，并且朗朗上口。

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