Prezentace Mira Stopky z konference PHP<live> spring 2016. Kvalitní vs. výnosný kód, aneb jak neurefaktorovat projekt až k smrti.

1. Quality vs Productivity
… they are literally refactoring themselves
to death ...

2. Quality - Goals
● Reliability
● Maintainability
● Security
● Efficiency

3. How do I improve quality of code?

4. KISS - Keep it simple, stupid

5. KISS - Keep it simple, stupid
Reliability
Maintainability
Security
Efficiency
Reliability
Maintainability
Security
Efficiency

6. Naming convention if(cislo === beznecislo) => :,(

7. Naming convention if(cislo === beznecislo) => :,(
Reliability
Maintainability
Security
Efficiency
Reliability
Maintainability
Security
Efficiency

8. DRY - Don't repeat yourself
DRY - Don't repeat yourself

9. DRY - Don't repeat yourself
Reliability
Maintainability
Security
Efficiency
Reliability
Maintainability
Security
Efficiency

10. Comments are your friends

11. Comments are your friends
Reliability
Maintainability
Security
Efficiency
Reliability
Maintainability
Security
Efficiency

12. Tests are your shield

13. Tests are your shield
Reliability
Maintainability
Security
Efficiency
Reliability
Maintainability
Security
Efficiency

14. Codereview

15. Codereview
Reliability
Maintainability
Security
Efficiency
Reliability
Maintainability
Security
Efficiency

16. How do I improve quality of code?
● KISS – Keep it simple, stupid
● Naming convention
● DRY - Don't repeat yourself
● Comments are your friends
● Tests are your shield
● Codereview

17. How do not to refactor the project to death
● Highest quality
● Debt 9
99
999
9999
99999
999999
9999999
99999999
999999999
9999999999 $$$

18. Absolute rules

19. Continuous refactoring
● No one is allowed to spend more time on the refactoring for a
given feature than the feature itself
● No one is allowed to spend zero time refactoring

20. Refactoring for current benefits
● Focus on the most critical pieces of code
● Do refactoring to a piece of code that you are trying to change anyway
● The most-touched areas of your code base
● 20/80

21. Share what you learn
● As you refactor, you get smarter
● Share what you learn, otherwise everyone has to learn every lesson before
it starts bring benefits

22. THE END

23. ● http://stackoverflow.com/questions/184618/what-is-the-best-comment-in-
source-code-you-have-ever-encountered
● http://www.titanui.com/3262-high-quality-blue-badge-vector-labels-02/
● http://cliparts.co/clipart/2401178
● http://tophdimgs.com/359296-continuous.html
● http://www.webstrateg.eu/newspost/refactoring-code/