COMPLEX IS EASY , ITS SIMPLE WHICH IS HARD SARAH TARAPOREWALLA - PowerPoint PPT Presentation

COMPLEX IS EASY , IT’S SIMPLE WHICH IS HARD

SARAH TARAPOREWALLA TECH PRINCIPAL @sarahtarap @sarahtarap

Let’s Explore Complexity in the Real World 1 How does it happen? 2 The One About The Checkbox 3 The One About The Fortress 4 The One About The Article 5 The One about the Pricing Rules 6 3 @sarahtarap

Complexity in the Real World @sarahtarap

@sarahtarap Photo courtesy of https://www. fl ickr.com/photos/chiropractic/3732497731/

@sarahtarap Photo courtesy of https://www.lamayor.org/mayor-garcetti-unveils-new-easy-read-parking-signs

@sarahtarap Photo courtesy of hhttps://www.rd.com/advice/saving-money/grocery-shopping-mistakes-that-are-wasting-money/

@sarahtarap Photo courtesy of https://commons.wikimedia.org/wiki/File:Vein_art_near.png

@sarahtarap Photo courtesy of http://www.stjohnnsw.com.au/

@sarahtarap Photo courtesy of https://www.crowdrise.com/handsonlycpr

@sarahtarap CYNEFIN FRAMEWORK 11 Photo courtesy ofhttps://en.wikipedia.org/wiki/Cyne fi n_framework#/media/File:Cyne fi n_framework,_February_2011_(2).jpeg

How does it happen? @sarahtarap

2 6 8 @sarahtarap

2 6 8 1 3 4 @sarahtarap

2 6 8 1 3 4 2 5 7 @sarahtarap

2 6 8 1 3 4 2 5 7 5 8 11 @sarahtarap

2 6 8 1 3 4 x < y < z 2 5 7 5 8 11 @sarahtarap

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@sarahtarap Photo courtesy of https://betterhumans.coach.me/cognitive-bias-cheat-sheet-55a472476b18

@sarahtarap

@sarahtarap

The One About The Checkbox @sarahtarap

SIMPLE CODE MANIFESTO Inheritance over Composition If-Then-Else Matchers over Primitives Tiny Types over Fat Objects over SRP Mixed Concerns over Decorators @sarahtarap 23

starapor @sarahtarap

@sarahtarap BOY SCOUT RULE Photo courtesy of http://disney.wikia.com/wiki/Russell

REFACTOR RED GREEN REFACTOR @sarahtarap 26

REFACTOR RED REFACTOR GREEN REVERT REFACTOR REFACTOR COMMIT @sarahtarap 27

GOOD CITIZEN Trailing commas in lists _matcher = new Matcher<Player> 
 { 
 { p => p.InPenaltyBox(), ReducePenaltyTime }, 
 { p => p.WearingAHat(), RemoveTheHat }, 
 { p => true, PlayARound }, 
 }; Brackets { } around conditionals public void TakeTurn(Player player) 
 { 
 if (player.InPenaltyBox()) 
 { 
 ReducePenaltyTime(); 
 } 
 } @sarahtarap 28

INTENTION REVEALING INTERFACES IFooHandler => IHandleLotsOfFoos IGameRepository => ICanFindTheGame @sarahtarap 29

@sarahtarap SIDE-EFFECT FREE CODE 30 Photo courtesy of https://xkcd.com/326/

@sarahtarap SQUINT TEST Photo courtesy of https://upload.wikimedia.org/wikipedia/en/7/7b/Snellen-myopia.png

S Simple Code Manifesto @sarahtarap

The One About The Fortress @sarahtarap

@sarahtarap JOB SECURITY 34 Photo courtesy of https://imgur.com/gallery/08Zxbv0

OPENNESS & COLLABORATION @sarahtarap 35

O Openness and Collaboration @sarahtarap

The One About The Article @sarahtarap

DOMAIN DRIVEN DESIGN @sarahtarap 38

@sarahtarap UBIQUITOUS LANGUAGE 39 Photo courtesy of http://pngimg.com/download/51770

@sarahtarap BOUNDED CONTEXTS 40 Photo courtesy of https://martinfowler.com/bliki/BoundedContext.html

DOMAIN DRIVEN DESIGN @sarahtarap 41

DOMAIN DRIVEN DESIGN @sarahtarap 42

U Ubiquitous Language & DDD @sarahtarap

The One About The Legacy @sarahtarap

@sarahtarap EXPLAIN YOUR SYSTEM Photo courtesy of http://evan.bottch.com/wp-content/uploads/2010/06/whiteboard.jpg

SIMON BROWN’S C4 MODEL @sarahtarap

@sarahtarap DESIGN-ON-A-POST-IT Photo courtesy of http://evan.bottch.com/wp-content/uploads/2010/06/whiteboard.jpg

P Post-it Design @sarahtarap

The One About The Pricing Rules @sarahtarap

GENERALISE SPECIALISE @sarahtarap

S Specialise to Generalise @sarahtarap

To Recap @sarahtarap

Manifesto O S Collaboration U DDD P Design S Openness Ubiquitous Simple Code Post-it Specialise to and Language & Generalise @sarahtarap

Manifesto O S Collaboration U DDD P Design S Openness Ubiquitous Simple Code Post-it Specialise to and Language & Generalise SARAH TARAPOREWALLA @sarahtarap @sarahtarap

Q&A @sarahtarap

THANKS FOR LISTENING @sarahtarap | me@sarahtaraporewalla.com