Refactoring: Improving the Design of Existing Code

Table of contents

1. Cover Page
2. About This E-Book
3. Front End Paper
4. Title Page
5. Copyright Page
6. Dedication Page
7. Contents
8. Foreword to the First Edition
9. Preface
   1. What Is Refactoring?
   2. What’s in This Book?
   3. Who Should Read This Book?
   4. Building on a Foundation Laid by Others
   5. Acknowledgments
10. Chapter 1 Refactoring: A First Example
    1. The Starting Point
    2. Comments on the Starting Program
    3. The First Step in Refactoring
    4. Decomposing the statement Function
    5. Status: Lots of Nested Functions
    6. Splitting the Phases of Calculation and Formatting
    7. Status: Separated into Two Files (and Phases)
    8. Reorganizing the Calculations by Type
    9. Status: Creating the Data with the Polymorphic Calculator
    10. Final Thoughts
11. Chapter 2 Principles in Refactoring
    1. Defining Refactoring
    2. The Two Hats
    3. Why Should We Refactor?
    4. When Should We Refactor?
    5. Problems with Refactoring
    6. Refactoring, Architecture, and Yagni
    7. Refactoring and the Wider Software Development Process
    8. Refactoring and Performance
    9. Where Did Refactoring Come From?
    10. Automated Refactorings
    11. Going Further
12. Chapter 3 Bad Smells in Code
    1. Mysterious Name
    2. Duplicated Code
    3. Long Function
    4. Long Parameter List
    5. Global Data
    6. Mutable Data
    7. Divergent Change
    8. Shotgun Surgery
    9. Feature Envy
    10. Data Clumps
    11. Primitive Obsession
    12. Repeated Switches
    13. Loops
    14. Lazy Element
    15. Speculative Generality
    16. Temporary Field
    17. Message Chains
    18. Middle Man
    19. Insider Trading
    20. Large Class
    21. Alternative Classes with Different Interfaces
    22. Data Class
    23. Refused Bequest
    24. Comments
13. Chapter 4 Building Tests
    1. The Value of Self-Testing Code
    2. Sample Code to Test
    3. A First Test
    4. Add Another Test
    5. Modifying the Fixture
    6. Probing the Boundaries
    7. Much More Than This
14. Chapter 5 Introducing the Catalog
    1. Format of the Refactorings
    2. The Choice of Refactorings
15. Chapter 6 A First Set of Refactorings
    1. Extract Function
    2. Inline Function
    3. Extract Variable
    4. Inline Variable
    5. Change Function Declaration
    6. Encapsulate Variable
    7. Rename Variable
    8. Introduce Parameter Object
    9. Combine Functions into Class
    10. Combine Functions into Transform
    11. Split Phase
16. Chapter 7 Encapsulation
    1. Encapsulate Record
    2. Encapsulate Collection
    3. Replace Primitive with Object
    4. Replace Temp with Query
    5. Extract Class
    6. Inline Class
    7. Hide Delegate
    8. Remove Middle Man
    9. Substitute Algorithm
17. Chapter 8 Moving Features
    1. Move Function
    2. Move Field
    3. Move Statements into Function
    4. Move Statements to Callers
    5. Replace Inline Code with Function Call
    6. Slide Statements
    7. Split Loop
    8. Replace Loop with Pipeline
    9. Remove Dead Code
18. Chapter 9 Organizing Data
    1. Split Variable
    2. Rename Field
    3. Replace Derived Variable with Query
    4. Change Reference to Value
    5. Change Value to Reference
19. Chapter 10 Simplifying Conditional Logic
    1. Decompose Conditional
    2. Consolidate Conditional Expression
    3. Replace Nested Conditional with Guard Clauses
    4. Replace Conditional with Polymorphism
    5. Introduce Special Case
    6. Introduce Assertion
20. Chapter 11 Refactoring APIs
    1. Separate Query from Modifier
    2. Parameterize Function
    3. Remove Flag Argument
    4. Preserve Whole Object
    5. Replace Parameter with Query
    6. Replace Query with Parameter
    7. Remove Setting Method
    8. Replace Constructor with Factory Function
    9. Replace Function with Command
    10. Replace Command with Function
21. Chapter 12 Dealing with Inheritance
    1. Pull Up Method
    2. Pull Up Field
    3. Pull Up Constructor Body
    4. Push Down Method
    5. Push Down Field
    6. Replace Type Code with Subclasses
    7. Remove Subclass
    8. Extract Superclass
    9. Collapse Hierarchy
    10. Replace Subclass with Delegate
    11. Replace Superclass with Delegate
22. Bibliography
23. Index
24. Back End Paper
25. Code Snippets