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DRY 2.0

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Avatar for Philippe Creux Philippe Creux
December 01, 2016
Programming
710
1

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.

Avatar for Philippe Creux

Philippe Creux

December 01, 2016

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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