DRY 2.0

DRY (Don't Repeat Yourself) is often defined as "No Code Duplication". That's DRY 1.0. The DRY principle really shimes in when you get it to the next level: "No Knowledge Duplication".

This lightning talk was given at #VanRuby Lightning Talk Meetup on Dec 1st 2016.

Transcript

1. @pcreux VanRuby - Dec 1st 2016 DRY 2.0
2. @pcreux VanRuby - Dec 1st 2016 D R Y
3. @pcreux VanRuby - Dec 1st 2016 D on’t R epeat Y ourself
4. @pcreux VanRuby - Dec 1st 2016
5. @pcreux VanRuby - Dec 1st 2016 “For example, if you’ve duplicated a bit of code in many places, the Don’t Repeat Yourself (DRY) principle tells you to extract the duplication into a single common method and then invoke this new method in place of the old code.”
6. @pcreux VanRuby - Dec 1st 2016 DRY = NO Code Duplication
7. @pcreux VanRuby - Dec 1st 2016
8. @pcreux VanRuby - Dec 1st 2016
9. @pcreux VanRuby - Dec 1st 2016
10. @pcreux VanRuby - Dec 1st 2016 DRY = NO Code Duplication
11. @pcreux VanRuby - Dec 1st 2016 DRY 1.0 = NO Code Duplication
12. @pcreux VanRuby - Dec 1st 2016 DRY 2.0 = NO KNOWLEDGE Duplication
13. @pcreux VanRuby - Dec 1st 2016
14. @pcreux VanRuby - Dec 1st 2016
15. @pcreux VanRuby - Dec 1st 2016
16. @pcreux VanRuby - Dec 1st 2016 Free Starter Pro99 Pro199 Pro499
17. @pcreux VanRuby - Dec 1st 2016
18. @pcreux VanRuby - Dec 1st 2016
19. @pcreux VanRuby - Dec 1st 2016 Free Starter Pro99 Pro199 Pro499 NEW PRICING! Free Startup Prime Premium …
20. @pcreux VanRuby - Dec 1st 2016
21. @pcreux VanRuby - Dec 1st 2016
22. @pcreux VanRuby - Dec 1st 2016
23. @pcreux VanRuby - Dec 1st 2016
24. @pcreux VanRuby - Dec 1st 2016 How did we get there?
25. @pcreux VanRuby - Dec 1st 2016 KNOWLEDGE Duplication
26. @pcreux VanRuby - Dec 1st 2016 Let’s FIX IT!
27. @pcreux VanRuby - Dec 1st 2016
28. @pcreux VanRuby - Dec 1st 2016 ONE SOURCE of TRUTH
29. @pcreux VanRuby - Dec 1st 2016 ExAMPLE: POLICY OBJECT
30. @pcreux VanRuby - Dec 1st 2016 POLICY OBJECT Can I do X?
31. @pcreux VanRuby - Dec 1st 2016 POLICY OBJECT cancancan pundit
 …
32. @pcreux VanRuby - Dec 1st 2016 ONE SOURCE of TRUTH = RICH DATA MODEL
33. @pcreux VanRuby - Dec 1st 2016
34. @pcreux VanRuby - Dec 1st 2016 DRY = NO CODE DUPLICATION + NO KNOWLEDGE Duplication