Limited Red

Transcript

1. @josephwilk
   Tuesday, 20 September 11
   

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2. Joseph Wilk
   Tuesday, 20 September 11
   

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3. Limited Red
   Joseph Wilk
   Tuesday, 20 September 11
   

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4. Limited Red
   Oh crap
   Joseph Wilk
   Tuesday, 20 September 11
   

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5. Work In Progress
   Tuesday, 20 September 11
   

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6. Work In Progress
   Tuesday, 20 September 11
   

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7. Context Switching is
   Expensive
   Tuesday, 20 September 11
   

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8. Small Batch sizes
   Large
   batches
   Small
   batches
   Tuesday, 20 September 11
   

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9. Red == Work in Progress
   Tuesday, 20 September 11
   

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10. 1 day
    1.5 day
    2 day
    Tuesday, 20 September 11
    

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11. Why is Red Bad?
    Tuesday, 20 September 11
    

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12. Limit Red
    Measure Red
    Learn
    Visualise Red
    Tuesday, 20 September 11
    

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13. Are we
    Professionals?
    Tuesday, 20 September 11
    

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14. Tuesday, 20 September 11
    

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15. Tuesday, 20 September 11
    

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16. Tuesday, 20 September 11
    

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17. Joseph Wilk
    REFACTORING
    TESTING
    RED TIME
    PAIRING
    Tuesday, 20 September 11
    

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18. Measuring &
    Visualising Red
    Tuesday, 20 September 11
    

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19. Limited Red
    Learn and adapt from test metrics
    Tuesday, 20 September 11
    

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20. Tuesday, 20 September 11
    

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21. Industrial Logic
    Tuesday, 20 September 11
    

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22. Industrial Logic
    Tuesday, 20 September 11
    

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23. Tuesday, 20 September 11
    

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24. Tuesday, 20 September 11
    

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25. Fighting
    Red
    Tuesday, 20 September 11
    

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26. ‣Parallel Change
    ‣Narrowed Change
    ‣Sequence Change
    ‣Graceful Retreat
    ‣Piecemeal Change
    ‣Gradual Change
    ‣Evolved Target
    ‣Unified Methods
    Joshua
    Kerievsky
    Patterns
    Tuesday, 20 September 11
    

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27. Parallel Change
    class ImageResizer
    def resize(x,y)
    ...
    end
    end
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28. Parallel Change
    class ImageResizer
    include ThumbResizer
    end
    module ThumbResizer
    def resize(x,y)
    ...
    end
    end
    Tuesday, 20 September 11
    

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29. Ship it
    Tuesday, 20 September 11
    

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30. But....
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31. Tuesday, 20 September 11
    

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32. Tuesday, 20 September 11
    

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33. Ship it
    Tuesday, 20 September 11
    

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34. Parallel Change
    class ImageResizer
    if FeatureFlipper.active?(:fast_resizer)
    include FastThumbResizer
    else
    include ThumbResizer
    end
    end
    module ThumbResizer
    def resize(x,y)
    ...
    end
    end
    module FastThumbResizer
    def resize(x,y)
    ...
    end
    end
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35. But... Both
    versions!!!
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36. Ship it
    Tuesday, 20 September 11
    

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37. Parallel Change
    class ImageResizer
    include FastThumbResizer
    end
    module FastThumbResizer
    def resize(x,y)
    ...
    end
    end
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38. Ship it
    Tuesday, 20 September 11
    

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39. <%- if @game.player?(@active_user) &&
    @black_player.present? &&
    @white_player.present? %>
    <%= render :template => 'messaging' %>
    <%- end %>
    <%- if @game.player?(@active_user) &&
    @black_player.present? &&
    @white_player.present? %>
    <%= render :template => 'messaging' %>
    <%- end %>
    Narrowed Change
    Tuesday, 20 September 11
    

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40. Narrowed Change
    class GamePresenter
    def initialize(game, black_payer, white_player)
    @game, @black_player, @white_player = game,
    black_player, white_player
    end
    def show_messaging?(&block)
    messaging_should_be_visible = @game.player?(@user) &&
    @black_player.present? &&
    @white_player.present?
    yield block if messaging_should_be_visible
    end
    end
    <%- game_presenter.show_messaging? do %>
    <%= render :template => 'messaging' %>
    <%- end %>
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41. Ship it
    Tuesday, 20 September 11
    

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42. Narrowed Change
    class GamePresenter
    def initialize(game, black_payer, white_player)
    @game, @black_player, @white_player = game,
    black_player, white_player
    end
    def show_messaging?(&block)
    messaging_should_be_visible= @game.human_player?(@user)
    yield block if messaging_should_be_visible
    end
    end
    <%- game_presenter.show_messaging? do %>
    <%= render :template => 'messaging' %>
    <%- end %>
    Tuesday, 20 September 11
    

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43. Ship it
    Tuesday, 20 September 11
    

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44. Sequence Change
    Narrowed
    change
    Remove
    control flag
    Extract
    method
    Tuesday, 20 September 11
    

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45. Sequence Change
    Narrowed
    change
    Remove
    control flag
    Extract
    method
    Tuesday, 20 September 11
    

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46. Graceful Retreat
    Shave?
    Please step away from the Yak... Slowly
    Tuesday, 20 September 11
    

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47. http://www.refactoring.com/catalog/index.html
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48. Learning more from Red
    ‣ Smart Continuous integration
    ‣ Failure rate
    ‣ Performance
    ‣ Flickering
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49. Tuesday, 20 September 11
    

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50. Tuesday, 20 September 11
    

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51. Evil hat
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52. Tuesday, 20 September 11
    

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53. More Books!
    Tuesday, 20 September 11
    

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54. “To measure is to know”
    Lord Kelvin
    Tuesday, 20 September 11
    

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55. @josephwilk
    joe@josephwilk.net
    Kiitos
    Tuesday, 20 September 11
    

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56. @josephwilk
    joe@josephwilk.net
    Kiitos
    Green
    Tuesday, 20 September 11
    

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57. @josephwilk
    joe@josephwilk.net
    Kiitos
    Green
    Tuesday, 20 September 11
    

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58. @josephwilk
    joe@josephwilk.net
    Kiitos
    Green
    Ship it
    Tuesday, 20 September 11
    

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