This book is mainly collection of refactoring methods given in Martin Fowler's great book

Basics

• Change Function Declaration
• Combine Functions into Class
• Combine Functions into Transform
• Extract Function
• Extract Variable
• Inline Function
• Inline Variable
• Introduce Parameter Object
• Rename Variable
• Split Phase

Organizing Data

• Change Reference to Value
• Change Value to Reference
• Rename Field
• Replace Derived Variable with Query
• Split Variable

Encapsulation

• Encapsulate Collection
• Encapsulate Record
• Encapsulate Variable
• Extract Class
• Hide Delegate
• Inline Class
• Remove Middle Man
• Replace Primitive With Object
• Replace Temp with Query

Moving Features

• Move Function
• Move Field
• Move Statements to Callers
• Move Statements into Function
• Remove Dead Code
• Replace Loop with Pipeline
• Slide Statements
• Split Loop

Conditional Logic

• Consolidate Conditional Expression
• Decompose Conditional
• Introduce Assertion
• Introduce Special Case
• Replace Conditional with Polymorphism
• Replace Nested Conditional With Guard Clauses

Dealing with Inheritance

• Collapse Hierarchy
• Extract Superclass
• Pull up Constructor Body
• Pull up Field
• Pull up Method
• Push down Field
• Push Down Method
• Remove Subclass
• Replace Subclass with Delegate
• Replace Superclass with Delegate
• Replace Type Code with Subclasses
• Substitute Algorithm

Refactoring Api

• Parameterize Function
• Preserve Whole Object
• Remove Flag Argument
• Replace Command with Function
• Replace Constructor with Factory Function
• Replace Function with Command
• Replace Parameter with Query
• Replace Query with Parameter
• Separate Query From Modifier

Code Smell

• Divergent Change
• Duplicated Code
• Long Parameter List
• Loops
• Message Chains
• Middle Man
• Mutable Data
• Mysterious Name
• Primite Obsession
• Refused Request
• Repeated Switches
• Shotgun Surgery
• Speculative Generality
• Temporary Field

TODOs

• Link the code to the documentation
• Fix some relative links