Composing Methods

Extract Method
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

Moving Features Between Objects

Move Method
Move Field
Extract Class
Inline Class
Hide Delegate
Remove Middle Man
Introduce Foreign Method
Introduce Local Extension

Organizing Data

Replace Magic Number with Symbolic Constant
Encapsulate Field
Self Encapsulate Field
Encapsulate Collection
Replace Record with Data Class
Replace Data Value with Object
Replace Array with Object
Change Value to Reference
Change Reference to Value
Duplicate Observed Data
Change Unidirectional Association to Bidirectional
Change Bidirectional Association to Unidirectional
Replace Type Code with Class
Replace Type Code with Subclasses
Replace Type Code with State/Strategy
Replace Subclass with Fields

Simplifying Conditional Expressions

Decompose Conditional
Consolidate Conditional Expression
Consolidate Duplicate Conditional Fragments
Remove Control Flag
Replace Nested Conditional with Guard Clauses
Replace Conditional with Polymorphism
Introduce Null Object
Introduce Assertion

Making Method Calls Simpler

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

Dealing with Generalization

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