Refactoring Games - 15 things to do after Extract Method
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The document outlines 15 specific refactoring strategies after applying the extract method technique in software development. It emphasizes best practices for cleaner code, including renaming variables, encapsulating conditionals, and avoiding boolean parameters. The author, Victor Rentea, shares insights from his experience as a technical trainer and promotes participation in coding communities and meetups.
![VictorRentea.ro
Feature Envy
method(α, …)
α.method(…)
“Move” refactor
“Keep Behavior next to State”[OOP]](https://image.slidesharecdn.com/refactoringgames-15thingsafterextractmethod-190917053734/85/Refactoring-Games-15-things-to-do-after-Extract-Method-16-320.jpg)
Refactoring Games - 15 things to do after Extract Method
- 1. Refactoring Games 15 things to do after Extract Method VictorRentea.ro VictorRentea
- 2. Victor
- 3. Victor Rentea Clean Code Evangelist VictorRentea.ro 30+ talks, 12 meetups .NET Lead Architect Tech Team Lead and Consultant Software Craftsman XP: Pair Programming, Refactoring, TDD Java Champion
- 4. VictorRentea.ro @victorrentea victor.rentea@gmail.com Independent Technical Trainer & Coach HibernateSpring Java 8 Architecture, DDDDesign Patterns Clean Code Unit Testing, TDD Java Performance more…Scala 200+ days1500 devs6 years VictorRentea.rovictor.rentea@gmail.com 30 companies Posting daily on AlsoLive-Trainingon
- 5. ➢ Largest 4 Java Meetups in Bucharest Yearly, in Q2, at Bucharest Java User Group ➢ Meetups everywhere I travel to teach Monthly 3-hours sessions, afterhours, throughout Europe: victorrentea.ro/#meetup ➢ Join for free: victorrentea.ro/community
- 6. 125
- 8. When you cannot find a satisfying name for a variable or a method, choose a Welsh one. You won't forget to change it later - Mario Fusco
- 10. VictorRentea.ro Extract Method Selection to Extract variable expression Extract Variables to generify/reuse … then extract method …then inline var back Expand Selection for less parameters
- 11. VictorRentea.ro 3. Ctrl- 2. Revert 1. Reader Powers in Universe
- 12. Do you love switches?
- 13. VictorRentea.ro A Clean Switch: is the only instruction in a method default: throw new One-line per case : return func(); : func(); break; return switch JEP 325: Switch Expressions In Java 13… soon…
- 14. VictorRentea.ro if (αααααα && βββββββ || γγγγγγγγ || ! δδδδδδδ) Encapsulate Conditionals if (α(..) && β(..) || γ(..) || ! δ(..)) if (αβ(..) || γδ(..))
- 16. VictorRentea.ro Feature Envy method(α, …) α.method(…) “Move” refactor “Keep Behavior next to State”[OOP]
- 17. VictorRentea.ro Discover Value Objects privateMethod(α, β) SomeUtil.publicHelper(α, β) VO vo = new VO(α, β); vo.method(); General-purpose? Never mocked?
- 18. Always Strive To Deepen your Domain Language
- 19. VictorRentea.ro How to refactor God Methods of 500 lines ? Extract Method Object refactor 138 Hint A class should have less than 200-300 lines You make it a class
- 20. VictorRentea.ro No side effects Prefer returning over changing Pure Functions 139 Same result for same inputs no externals, time or Random convertUser(user):UserDto
- 22. VictorRentea.ro bigScaryFunc(α, β) { …😱… } Wrap Call bigScaryFunc(α, β) { stuffBefore(); bigScaryFunc__(α, β); stuffAfter(); } bigScaryFunc__(α, β) { …😱… }
- 24. VictorRentea.ro 1. Rename 2. Inline 3. Reorder Params 4. Remove Params by extracting more (with Ctrl-Z) 5. Distill switch expressions to Clean Switch Rules 6. Early return errors 7. Add parameters for reuse by extract/inline variable at call site (Ctrl-Z) 8. Move method to object (vs Feature Envy) 9. Encapsulate conditionals 10. Extract static Util functions 11. Spawn Value Objects to host extracted logic 12. Extract again - boolean vs SRP 13. Wrap call to “safely” add more code (Open-Closed Principle) 14. Extract Method Object for heavy logic 15. Extract Pure Functions
- 25. I'm available a statement of seniority I use both hemispheres Tough meetings? Abused estimates? Purpose of code:--Uncle Bob 1. Maintainable 2. Does its job! Functional Party Activist Stay into The Light Trainings, talks, goodies, Good stuff daily on: Clean Code needs strength and determination Thank You! + Join my community Code: https://github.com/victorrentea/refactoring