Develop your sense of code smell

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It has been 18 years since Martin Fowler published “Refactoring” which codified an initial catalog of code smells. But in that time, have our noses been able to sniff them out? What have we done to develop our sense of smell? We will do a series of Sparrow Decks to increase our sense of code smell by building the pattern recognition part of our brain. This way we can more easily know if there is something wrong with the code. Remember smelling you have a problem is always the first step. (Note: this technique works for non-programmers as well as programmers so even if you’re not a programmer, come and develop your sense of code smell!)

Software

Examples of smells in the physical world?
Photo by freestocks.org on Unsplash

Win this book and a mechanical keyboard at the closing!

Code Smells
• Long Method
• Large Class
• Primitive Obsession
• Long Parameter List
• Data Clumps
• Alternative Classes
with Different
Interfaces
• Refused Bequest
• Switch Statements
• Temporary Field
• Divergent Change
• Parallel Inheritance
Hierarchies
• Shotgun Surgery
• Comments
• Duplicate Code
• Data Class
• Dead Code
• Lazy Class
• Speculative Generality
• Feature Envy
• Inappropriate Intimacy
• Incomplete Library
Class
• Message Chains
• Middle Man

Code smell is maybe a misnomer
Photo by freestocks.org on Unsplash

http://bit.ly/sparrowdecks
Sparrow Decks

Resources
• Llewellyn Falco’s Sparrow Decks:
http://llewellynfalco.blogspot.com/p/sparrow-decks.html
• Kathy Sierra on Making Badass Developers:
https://www.youtube.com/watch?v=FKTxC9pl-WM
• Smell Descriptions online:
https://refactoring.guru/refactoring/smells

Mike Clement
• @mdclement
• mike@softwareontheside.com
• https://github.com/mdclement
• Slides at:
http://blog.softwareontheside.com
• Greater Sum
• @thegreatersum
• http://www.greatersum.com
• Software Craftsmanship Atlanta
• Find us on meetup.com

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Develop your sense of code smell

1. Develop your Sense of Code Smell Mike Clement @mdclement Founding Software Craftsman at Greater Sum mike@softwareontheside.com http://blog.softwareontheside.com

2. Examples of smells in the physical world? Photo by freestocks.org on Unsplash

3. What if you couldn’t smell?

4. What if you learned to smell wrong?

5. What does that even mean?

6. Style Ira Glass video

7. Photo by henry fournier on Unsplas

8. Photo by Elijah Henderson on Unsplash

9. Practice makes…

10. Practice makes Permanent

11.

12. Photo by Roksolana Zasiadko on Unsplash

13.

14. Practice makes Permanent

15.

16. High Quality, High Quantity Examples

17. Sparrow Decks

18. You have to try…

19. Yes you’re going to feel silly…

20. And you might be wrong…

21. And sometimes you WILL be wrong…

22. But trying is really important!

23. Sparrows

24. Win this book and a mechanical keyboard at the closing!

25. Code Smells • Long Method • Large Class • Primitive Obsession • Long Parameter List • Data Clumps • Alternative Classes with Different Interfaces • Refused Bequest • Switch Statements • Temporary Field • Divergent Change • Parallel Inheritance Hierarchies • Shotgun Surgery • Comments • Duplicate Code • Data Class • Dead Code • Lazy Class • Speculative Generality • Feature Envy • Inappropriate Intimacy • Incomplete Library Class • Message Chains • Middle Man

26. Code smell is maybe a misnomer Photo by freestocks.org on Unsplash

27. How do you get the necessary reps?

28.

29. You have to try…

30. Yes you’re going to feel silly…

31. And you might be wrong…

32. And sometimes you WILL be wrong…

33. But trying is really important!

34. Long Line

35. Clutter

36. Photo by Doug Linstedt on Unsplash

37. Bad Names

38. You have to try…

39. Yes you’re going to feel silly…

40. And you might be wrong…

41. And sometimes you WILL be wrong…

42. But trying is really important!

43. But why Mike?

44. Why do I have to try?

45. Why do I have to try? Rat video

46. Long Method

47. Duplication

48. http://bit.ly/sparrowdecks Sparrow Decks

49. Code Smells • Long Method • Large Class • Primitive Obsession • Long Parameter List • Data Clumps • Alternative Classes with Different Interfaces • Refused Bequest • Switch Statements • Temporary Field • Divergent Change • Parallel Inheritance Hierarchies • Shotgun Surgery • Comments • Duplicate Code • Data Class • Dead Code • Lazy Class • Speculative Generality • Feature Envy • Inappropriate Intimacy • Incomplete Library Class • Message Chains • Middle Man

50. Resources • Llewellyn Falco’s Sparrow Decks: http://llewellynfalco.blogspot.com/p/sparrow-decks.html • Kathy Sierra on Making Badass Developers: https://www.youtube.com/watch?v=FKTxC9pl-WM • Smell Descriptions online: https://refactoring.guru/refactoring/smells

51. Mike Clement • @mdclement • mike@softwareontheside.com • https://github.com/mdclement • Slides at: http://blog.softwareontheside.com • Greater Sum • @thegreatersum • http://www.greatersum.com • Software Craftsmanship Atlanta • Find us on meetup.com

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