Download - Frozenrails2011
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@josephwilk
Tuesday, 20 September 11
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Joseph WilkTuesday, 20 September 11
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Limited Red
Joseph WilkTuesday, 20 September 11
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Limited RedOh crap
Joseph WilkTuesday, 20 September 11
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Work In Progress
Tuesday, 20 September 11
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Work In Progress
Tuesday, 20 September 11
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Context Switching is Expensive
Tuesday, 20 September 11
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Small Batch sizes
Large batches
Small batches
Tuesday, 20 September 11
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Red == Work in Progress
Tuesday, 20 September 11
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1 day
1.5 day
2 day
Tuesday, 20 September 11
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Why is Red Bad?
Tuesday, 20 September 11
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Limit Red
Measure Red
Learn
Visualise Red
Tuesday, 20 September 11
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Are we Professionals?
Tuesday, 20 September 11
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Tuesday, 20 September 11
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Tuesday, 20 September 11
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Tuesday, 20 September 11
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Joseph Wilk
REFACTORING
TESTINGRE
D TI
MEPAIRING
Tuesday, 20 September 11
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Measuring &Visualising Red
Tuesday, 20 September 11
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Limited RedLearn and adapt from test metrics
Tuesday, 20 September 11
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Tuesday, 20 September 11
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Industrial Logic
Tuesday, 20 September 11
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Industrial LogicTuesday, 20 September 11
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Tuesday, 20 September 11
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Tuesday, 20 September 11
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Fighting Red
Tuesday, 20 September 11
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‣Parallel Change
‣Narrowed Change
‣Sequence Change
‣Graceful Retreat
‣Piecemeal Change
‣Gradual Change
‣Evolved Target
‣Unified MethodsJoshua Kerievsky
Patterns
Tuesday, 20 September 11
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Parallel Change
class ImageResizer
def resize(x,y) ... end
end
Tuesday, 20 September 11
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Parallel Change
class ImageResizer include ThumbResizerend
module ThumbResizer def resize(x,y) ... endend
Tuesday, 20 September 11
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Ship it
Tuesday, 20 September 11
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But....
Tuesday, 20 September 11
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Tuesday, 20 September 11
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Tuesday, 20 September 11
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Ship itTuesday, 20 September 11
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Parallel Changeclass ImageResizer if FeatureFlipper.active?(:fast_resizer) include FastThumbResizer else include ThumbResizer endend
module ThumbResizer def resize(x,y) ... endend
module FastThumbResizer def resize(x,y) ... endend
Tuesday, 20 September 11
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But... Bothversions!!!
Tuesday, 20 September 11
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Ship itTuesday, 20 September 11
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Parallel Change
class ImageResizer include FastThumbResizerend
module FastThumbResizer def resize(x,y) ... endend
Tuesday, 20 September 11
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Ship itTuesday, 20 September 11
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<%- 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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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 endend
<%- game_presenter.show_messaging? do %> <%= render :template => 'messaging' %><%- end %>
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Ship itTuesday, 20 September 11
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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 endend
<%- game_presenter.show_messaging? do %> <%= render :template => 'messaging' %><%- end %>
Tuesday, 20 September 11
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Ship itTuesday, 20 September 11
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Sequence Change
Narrowed change
Remove control flag
Extract method
Tuesday, 20 September 11
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Sequence Change
Narrowed change
Remove control flag
Extract method
Tuesday, 20 September 11
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Graceful Retreat
Shave?
Please step away from the Yak... Slowly
Tuesday, 20 September 11
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http://www.refactoring.com/catalog/index.html
Tuesday, 20 September 11
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Learning more from Red
‣ Smart Continuous integration
‣ Failure rate
‣ Performance
‣ Flickering
Tuesday, 20 September 11
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Tuesday, 20 September 11
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Tuesday, 20 September 11
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Evil hat
Tuesday, 20 September 11
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Tuesday, 20 September 11
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More Books!
Tuesday, 20 September 11
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“To measure is to know”Lord Kelvin
Tuesday, 20 September 11
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@josephwilk
Kiitos
Tuesday, 20 September 11
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@josephwilk
Kiitos
Green
Tuesday, 20 September 11
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@josephwilk
Kiitos
Green
Tuesday, 20 September 11
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@josephwilk
Kiitos
GreenShip itTuesday, 20 September 11