Sandi Metz: Rules - Speaker Deck

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@sandimetz Jan 2014 Sandi Metz Rules Tuesday, January 14, 14

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@sandimetz Jan 2014 taboos Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 laws Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 norms Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 obedience? Tuesday, January 14, 14

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@sandimetz Jan 2014 1 self interest Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 2 identity status Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 3 authority Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 4 order Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 5 social sanctions Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 6 inherent sanctions Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 7 ignorance Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 8 habit Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 taboos laws norms Tuesday, January 14, 14

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@sandimetz Jan 2014 self interest identity/status authority order social sanctions inherent sanctions ignorance habit Tuesday, January 14, 14

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@sandimetz Jan 2014 5 Rules Tuesday, January 14, 14

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@sandimetz Jan 2014 5 Constraints Tuesday, January 14, 14

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@sandimetz Jan 2014 100 lines per class Tuesday, January 14, 14

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@sandimetz Jan 2014 5 lines per method Tuesday, January 14, 14

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@sandimetz Jan 2014 4 parameters per method Tuesday, January 14, 14

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@sandimetz Jan 2014 1 instance var per rails view Tuesday, January 14, 14

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@sandimetz Jan 2014 2 class names per rails controller action Tuesday, January 14, 14

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@sandimetz Jan 2014 2 class names per rails controller action (business, presenter) Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Dispensation? Tuesday, January 14, 14

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@sandimetz Jan 2014 Dispensation? Convince your pair!* sdf *Rule #6 Tuesday, January 14, 14

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@sandimetz Jan 2014 100 lines per class 5 lines per method 4 params per method 1 ivar per view 2 class names per controller action No More Than Tuesday, January 14, 14

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@sandimetz Jan 2014 consequences Tuesday, January 14, 14

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@sandimetz Jan 2014 bias towards small objects Tuesday, January 14, 14

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@sandimetz Jan 2014 bias towards POROs Tuesday, January 14, 14

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@sandimetz Jan 2014 bias away from dependencies Tuesday, January 14, 14

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@sandimetz Jan 2014 rule qualities Tuesday, January 14, 14

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@sandimetz Jan 2014 arbitrary cut-offs Tuesday, January 14, 14

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@sandimetz Jan 2014 consistent goals Tuesday, January 14, 14

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@sandimetz Jan 2014 tension Tuesday, January 14, 14

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@sandimetz Jan 2014 objects Tuesday, January 14, 14

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@sandimetz Jan 2014 objects vs Tuesday, January 14, 14

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@sandimetz Jan 2014 objects vs procedures Tuesday, January 14, 14

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@sandimetz Jan 2014 objects vs procedures Tuesday, January 14, 14

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@sandimetz Jan 2014 objects vs procedures Tuesday, January 14, 14

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@sandimetz Jan 2014 perspective Tuesday, January 14, 14

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@sandimetz Jan 2014 Rails app Tuesday, January 14, 14

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@sandimetz Jan 2014 Rails app vs Tuesday, January 14, 14

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@sandimetz Jan 2014 Rails app vs application that uses Rails Tuesday, January 14, 14

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@sandimetz Jan 2014 why follow rules? Tuesday, January 14, 14

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@sandimetz Jan 2014 self interest Tuesday, January 14, 14

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@sandimetz Jan 2014 signal others? Tuesday, January 14, 14

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@sandimetz Jan 2014 research Tuesday, January 14, 14

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@sandimetz Jan 2014 Erik O. Kimbrough Alexander Vostroknutov Tuesday, January 14, 14

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@sandimetz Jan 2014 Using Rules to Screen for Cooperative Types: Rule-Following and Restraint in Common Pool Resource Systems Tuesday, January 14, 14

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@sandimetz Jan 2014 Using Rules to Screen for Cooperative Types: Rule-Following and Restraint in Common Pool Resource Systems Tuesday, January 14, 14

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@sandimetz Jan 2014 study Tuesday, January 14, 14

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@sandimetz Jan 2014 study part 1 Tuesday, January 14, 14

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@sandimetz Jan 2014 identify followers vs breakers Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Task: Walk---------> Tuesday, January 14, 14

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@sandimetz Jan 2014 Task: Walk---------> Tuesday, January 14, 14

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@sandimetz Jan 2014 Task: Walk---------> Tuesday, January 14, 14

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@sandimetz Jan 2014 given 8€ Tuesday, January 14, 14

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@sandimetz Jan 2014 lose .08€ per second Tuesday, January 14, 14

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@sandimetz Jan 2014 red light = 5 seconds Tuesday, January 14, 14

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@sandimetz Jan 2014 “Wait for green light.” Tuesday, January 14, 14

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@sandimetz Jan 2014 some folks Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 etc... Tuesday, January 14, 14

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@sandimetz Jan 2014 other folks Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 study part 2 Tuesday, January 14, 14

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@sandimetz Jan 2014 separate into like groups Tuesday, January 14, 14

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@sandimetz Jan 2014 play cooperative game Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 4 players Tuesday, January 14, 14

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@sandimetz Jan 2014 4 players 10 rounds Tuesday, January 14, 14

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@sandimetz Jan 2014 4 players 10 rounds draw tokens Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 ∞ Tuesday, January 14, 14

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@sandimetz Jan 2014 1 1 1 1 ∞ Tuesday, January 14, 14

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@sandimetz Jan 2014 1 1 1 1 ∞ Tuesday, January 14, 14

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@sandimetz Jan 2014 1 1 1 1 360 ∞ Tuesday, January 14, 14

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@sandimetz Jan 2014 1 1 1 1 360 2 ∞ Tuesday, January 14, 14

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@sandimetz Jan 2014 each player draws 60 tokens per round Tuesday, January 14, 14

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@sandimetz Jan 2014 Round 1 Tuesday, January 14, 14

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@sandimetz Jan 2014 Round 1 120 Tuesday, January 14, 14

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@sandimetz Jan 2014 120 Regeneration Tuesday, January 14, 14

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@sandimetz Jan 2014 120 * .5 Regeneration Tuesday, January 14, 14

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@sandimetz Jan 2014 180 Regeneration Tuesday, January 14, 14

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@sandimetz Jan 2014 Regeneration Tuesday, January 14, 14

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@sandimetz Jan 2014 Regeneration Tuesday, January 14, 14

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@sandimetz Jan 2014 30 Regeneration Tuesday, January 14, 14

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@sandimetz Jan 2014 30 Regeneration Tuesday, January 14, 14

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@sandimetz Jan 2014 Round 2 180 remain?? Tuesday, January 14, 14

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@sandimetz Jan 2014 Round 2 180 - 30 = 150 Tuesday, January 14, 14

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@sandimetz Jan 2014 Round 2 180 - 30 = 150 150 / 4 = 37.5 Tuesday, January 14, 14

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@sandimetz Jan 2014 Round 2 37! Tuesday, January 14, 14

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@sandimetz Jan 2014 180 Round 2 1 1 1 1 2 Tuesday, January 14, 14

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@sandimetz Jan 2014 Round 2 Tuesday, January 14, 14

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@sandimetz Jan 2014 Round 2 32 Tuesday, January 14, 14

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@sandimetz Jan 2014 32 Regeneration Tuesday, January 14, 14

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@sandimetz Jan 2014 32 * .5 Regeneration Tuesday, January 14, 14

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@sandimetz Jan 2014 48 Regeneration Tuesday, January 14, 14

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@sandimetz Jan 2014 (current - 30) / 4 Tuesday, January 14, 14

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@sandimetz Jan 2014 Round 3 4 Tuesday, January 14, 14

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@sandimetz Jan 2014 results Tuesday, January 14, 14

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@sandimetz Jan 2014 followers Tuesday, January 14, 14

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@sandimetz Jan 2014 followers cooperate for mutual long term gain Tuesday, January 14, 14

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@sandimetz Jan 2014 breakers Tuesday, January 14, 14

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@sandimetz Jan 2014 breakers throw team under bus Tuesday, January 14, 14

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@sandimetz Jan 2014 60! 60! 60! 60! Tuesday, January 14, 14

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@sandimetz Jan 2014 mixed groups Tuesday, January 14, 14

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@sandimetz Jan 2014 mixed groups behave like breaker groups Tuesday, January 14, 14

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@sandimetz Jan 2014 30! 30! 30! 50! Tuesday, January 14, 14

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@sandimetz Jan 2014 50! Tuesday, January 14, 14

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@sandimetz Jan 2014 60! 60! 60! 50! Tuesday, January 14, 14

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@sandimetz Jan 2014 consequences (reprise) Tuesday, January 14, 14

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@sandimetz Jan 2014 bias towards small objects Tuesday, January 14, 14

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@sandimetz Jan 2014 bias towards POROs Tuesday, January 14, 14

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@sandimetz Jan 2014 bias away from dependencies Tuesday, January 14, 14

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@sandimetz Jan 2014 bias towards collaboration Tuesday, January 14, 14

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@sandimetz Jan 2014 bias towards collaboration Tuesday, January 14, 14

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@sandimetz Jan 2014 self interest identity/status authority order social sanctions inherent sanctions ignorance habit Tuesday, January 14, 14

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@sandimetz Jan 2014 9 signal cooperation Tuesday, January 14, 14

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@sandimetz Jan 2014 rules matter Tuesday, January 14, 14

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@sandimetz Jan 2014 write better software Tuesday, January 14, 14

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@sandimetz Jan 2014 ﬁnd trustworthy humans Tuesday, January 14, 14

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@sandimetz Jan 2014 Thanks Tuesday, January 14, 14

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@sandimetz Jan 2014 Credits http://www.flickr.com/photos/paul-w-locke/1792803096/ Cannibal Pumpkins http://www.flickr.com/photos/john_pp/3155064087/ 100K Speed limit sign on cliff with hiker http://www.flickr.com/photos/paphio/272769602/ Cops cheek kissing http://www.flickr.com/photos/pixel8-rcrd/5791227393/ kid winning contest http://www.flickr.com/photos/fluffy_steve/2537798898/ two goths http://www.flickr.com/photos/bobjagendorf/3064198102/ wall street shuffle http://www.flickr.com/photos/pdsphil/278060802/ rubyconf room 2006 http://www.flickr.com/photos/danicuki/6319528505/ konstanin and jose http://www.flickr.com/photos/lucasrenan/5142409437/ 3 ruby nerds, 10/26/2010 http://www.flickr.com/photos/85529750@N00/5200928365/ pope barcelona http://www.flickr.com/photos/nathaninsandiego/3783772122/ umpire http://www.flickr.com/photos/rrrodrigo/4664885112/ matz http://www.flickr.com/photos/85529750@N00/5200928365/ pope barcelona http://www.flickr.com/photos/nathaninsandiego/3783772122/ umpire http://www.flickr.com/photos/rrrodrigo/4664885112/ matz http://www.flickr.com/photos/z_wenjie/7820625836 pansies http://www.flickr.com/photos/haikugirl/4813516858/ trees http://www.flickr.com/photos/emsef/2407145479/ bus stop queue http://www.flickr.com/photos/theretrographer/9228096325/ rows of jail cells brightly lit Tuesday, January 14, 14

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@sandimetz Jan 2014 Credits http://www.flickr.com/photos/jakebouma/102485568/ Car cliff warning http://www.flickr.com/photos/burge009/5215723703/ free tatoos http://www.flickr.com/photos/singularitysummit/6261754179/ one swarming robot http://www.flickr.com/photos/singularitysummit/6262287656/ swarming robots swarming http://www.flickr.com/photos/osakasteve/17178084/ swarming robots in a line http://en.wikipedia.org/wiki/Social_rule_system_theory Kinbrough, Erik O., Vosroknutov, Alexander (2012 draft), Using Rules to Screen for Cooperative Types: Rule-Following and Restraint in Common Pool Resource Systems Tuesday, January 14, 14

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http://poodr.com Sandi Metz @sandimetz @sandimetz Jan 2014 Tuesday, January 14, 14

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@sandimetz Jan 2014 3-day public OOP class, Durham March 12-14, 2014 http://sandimetz.com Tuesday, January 14, 14

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@sandimetz Jan 2014 3-day public OOP class, Durham March 12-14, 2014 http://sandimetz.com * triangle.rb discount * http://bit.ly/mar2014_99bottles Tuesday, January 14, 14

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@sandimetz Jan 2014 Questions? Tuesday, January 14, 14

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http://poodr.com Sandi Metz @sandimetz @sandimetz Jan 2014 Tuesday, January 14, 14