Code Refactoring Cheatsheet
- 1. Refactoring Techniques Composing Methods Extract Method Inline Method Extract Variable Inline Temp
- 2. Replace Temp with Query Replace Method with Method Object Split Temporary Variable
- 3. Remove Assignments to Parameters Substitute Algorithm
- 4. Moving Features between Objects Move Method Move Field Extract Class Inline Class
- 5. Hide Delegate Remove Middleman Introduce Foreign Method
- 7. Organizing Data Self-Encapsulate Field Encapsulate Field Change Value to Reference Change Reference to Value
- 8. Replace Data Value with Object Replace Array with Object Encapsulate Collection Change Unidirectional Association to Bidirectional Change Bidirectional Association to Unidirectional Replace Magic Number with Symbolic Constant
- 9. Duplicate Observed Data Replace Type Code with Class Replace Type Code with Subclasses
- 10. Replace Type Code with State/Strategy Replace Subclass with Fields
- 11. Simplifying Conditional Expressions Decompose Conditional Consolidate Conditional Expression Consolidate Duplicate Conditional Fragments Remove Control Flag
- 12. Replace Nested Conditional with Guard Clauses Introduce Assertion
- 13. Replace Conditional with Polymorphism Introduce Null Object
- 14. Simplifying Method Calls Rename Method Add Parameter Remove Unused Parameter Separate Query from Modifier Parameterize Method Preserve Whole Object Replace Parameter with Method Call
- 15. Replace Parameter with Explicit Methods Introduce Parameter Object Remove Setting Method for Immutable Fields Hide Method that should not be Public
- 16. Replace Constructor with Factory Method Replace Error Code with Exception Replace Exception with Test
- 17. Dealing with Generalization Pull Up Field Pull Up Method Pull Up Constructor Body Push Down Field
- 18. Push Down Method Extract Subclass Extract Superclass Collapse Hierarchy
- 19. Extract Interface Form Template Method Replace Inheritance with Delegation Replace Delegation with Inheritance