Rules

@sandimetz Sep 2013 Sandi Metz Rules 1 Sunday, September 15,
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@sandimetz Sep 2013 taboos 2 Sunday, September 15, 13

@sandimetz Sep 2013 3 Sunday, September 15, 13

@sandimetz Sep 2013 laws 4 Sunday, September 15, 13

@sandimetz Sep 2013 norms 6 Sunday, September 15, 13

@sandimetz Sep 2013 obedience? 8 Sunday, September 15, 13

@sandimetz Sep 2013 1 self interest 9 Sunday, September 15,
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@sandimetz Sep 2013 2 identity status 11 Sunday, September 15,
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@sandimetz Sep 2013 3 authority 17 Sunday, September 15, 13

@sandimetz Sep 2013 4 order 21 Sunday, September 15, 13

@sandimetz Sep 2013 5 social sanctions 25 Sunday, September 15,
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@sandimetz Sep 2013 6 inherent sanctions 27 Sunday, September 15,
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@sandimetz Sep 2013 7 ignorance 29 Sunday, September 15, 13

@sandimetz Sep 2013 8 habit 31 Sunday, September 15, 13

@sandimetz Sep 2013 taboos laws norms 35 Sunday, September 15,
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@sandimetz Sep 2013 self interest identity/status authority order social sanctions
inherent sanctions ignorance habit 36 Sunday, September 15, 13

@sandimetz Sep 2013 5 Rules 37 Sunday, September 15, 13

@sandimetz Sep 2013 5 Constraints 38 Sunday, September 15, 13

@sandimetz Sep 2013 100 lines per class 39 Sunday, September
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@sandimetz Sep 2013 5 lines per method 40 Sunday, September
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@sandimetz Sep 2013 4 parameters per method 41 Sunday, September
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@sandimetz Sep 2013 1 instance var per rails view 42
Sunday, September 15, 13

@sandimetz Sep 2013 2 class names per rails controller action
43 Sunday, September 15, 13

@sandimetz Sep 2013 2 class names per rails controller action
(business, presenter) 43 Sunday, September 15, 13

@sandimetz Sep 2013 Dispensation? 44 Sunday, September 15, 13

@sandimetz Sep 2013 Dispensation? Convince your pair!* sdf *Rule #6

@sandimetz Sep 2013 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 45 Sunday, September 15, 13

@sandimetz Sep 2013 consequences 46 Sunday, September 15, 13

@sandimetz Sep 2013 bias towards small objects 47 Sunday, September
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@sandimetz Sep 2013 bias towards POROs 48 Sunday, September 15,
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@sandimetz Sep 2013 bias away from dependencies 49 Sunday, September
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@sandimetz Sep 2013 rule qualities 50 Sunday, September 15, 13

@sandimetz Sep 2013 arbitrary cut-offs 51 Sunday, September 15, 13

@sandimetz Sep 2013 consistent goals 52 Sunday, September 15, 13

@sandimetz Sep 2013 tension 53 Sunday, September 15, 13

@sandimetz Sep 2013 objects 54 Sunday, September 15, 13

@sandimetz Sep 2013 objects vs 55 Sunday, September 15, 13

@sandimetz Sep 2013 objects vs procedures 56 Sunday, September 15,
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@sandimetz Sep 2013 perspective 59 Sunday, September 15, 13

@sandimetz Sep 2013 Rails app 60 Sunday, September 15, 13

@sandimetz Sep 2013 Rails app vs 61 Sunday, September 15,
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@sandimetz Sep 2013 Rails app vs application that uses Rails

@sandimetz Sep 2013 why follow rules? 63 Sunday, September 15,
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@sandimetz Sep 2013 self interest 64 Sunday, September 15, 13

@sandimetz Sep 2013 signal others? 65 Sunday, September 15, 13

@sandimetz Sep 2013 research 66 Sunday, September 15, 13

@sandimetz Sep 2013 Erik O. Kimbrough Alexander Vostroknutov 67 Sunday,
September 15, 13

@sandimetz Sep 2013 Using Rules to Screen for Cooperative Types:
Rule-Following and Restraint in Common Pool Resource Systems 68 Sunday, September 15, 13

@sandimetz Sep 2013 Using Rules to Screen for Cooperative Types:
Rule-Following and Restraint in Common Pool Resource Systems 69 Sunday, September 15, 13

@sandimetz Sep 2013 study 70 Sunday, September 15, 13

@sandimetz Sep 2013 study part 1 71 Sunday, September 15,
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@sandimetz Sep 2013 identify followers vs breakers 72 Sunday, September
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@sandimetz Sep 2013 Task: Walk---------> 73 Sunday, September 15, 13

@sandimetz Sep 2013 given 8€ 74 Sunday, September 15, 13

@sandimetz Sep 2013 lose .08€ per second 75 Sunday, September
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@sandimetz Sep 2013 red light = 5 seconds 76 Sunday,
September 15, 13

@sandimetz Sep 2013 “Wait for green light.” 77 Sunday, September
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@sandimetz Sep 2013 some folks 78 Sunday, September 15, 13

@sandimetz Sep 2013 etc... 83 Sunday, September 15, 13

@sandimetz Sep 2013 other folks 84 Sunday, September 15, 13

@sandimetz Sep 2013 study part 2 86 Sunday, September 15,
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@sandimetz Sep 2013 separate into like groups 87 Sunday, September
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@sandimetz Sep 2013 play cooperative game 88 Sunday, September 15,
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@sandimetz Sep 2013 4 players 89 Sunday, September 15, 13

@sandimetz Sep 2013 4 players 10 rounds 89 Sunday, September
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@sandimetz Sep 2013 4 players 10 rounds draw tokens 89

@sandimetz Sep 2013 ∞ 90 Sunday, September 15, 13

@sandimetz Sep 2013 1 1 1 1 ∞ 90 Sunday,
September 15, 13

@sandimetz Sep 2013 1 1 1 1 360 ∞ 90

@sandimetz Sep 2013 1 1 1 1 360 2 ∞

@sandimetz Sep 2013 each player draws 60 tokens per round

@sandimetz Sep 2013 Round 1 92 Sunday, September 15, 13

@sandimetz Sep 2013 Round 1 120 92 Sunday, September 15,
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@sandimetz Sep 2013 120 Regeneration 93 Sunday, September 15, 13

@sandimetz Sep 2013 120 * .5 Regeneration 94 Sunday, September
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@sandimetz Sep 2013 Regeneration 96 Sunday, September 15, 13

@sandimetz Sep 2013 Round 2 180 remain?? 98 Sunday, September
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@sandimetz Sep 2013 Round 2 180 - 30 = 150

@sandimetz Sep 2013 Round 2 180 - 30 = 150
150 / 4 = 37.5 100 Sunday, September 15, 13

@sandimetz Sep 2013 Round 2 37! 101 Sunday, September 15,
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@sandimetz Sep 2013 180 Round 2 1 1 1 1
2 102 Sunday, September 15, 13

@sandimetz Sep 2013 Round 2 103 Sunday, September 15, 13

@sandimetz Sep 2013 Round 2 32 103 Sunday, September 15,
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@sandimetz Sep 2013 32 * .5 Regeneration 105 Sunday, September
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@sandimetz Sep 2013 48 Regeneration Etc... 106 Sunday, September 15,
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@sandimetz Sep 2013 (current - 30) / 4 107 Sunday,
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@sandimetz Sep 2013 results 108 Sunday, September 15, 13

@sandimetz Sep 2013 followers 109 Sunday, September 15, 13

@sandimetz Sep 2013 followers cooperate for mutual long term gain

@sandimetz Sep 2013 breakers 110 Sunday, September 15, 13

@sandimetz Sep 2013 breakers throw team under bus 110 Sunday,
September 15, 13

@sandimetz Sep 2013 60! 60! 60! 60! 111 Sunday, September
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@sandimetz Sep 2013 mixed groups 112 Sunday, September 15, 13

@sandimetz Sep 2013 mixed groups behave like breaker groups 112

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@sandimetz Sep 2013 50! 114 Sunday, September 15, 13

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@sandimetz Sep 2013 consequences (reprise) 115 Sunday, September 15, 13

@sandimetz Sep 2013 bias towards small objects 116 Sunday, September
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@sandimetz Sep 2013 bias towards POROs 117 Sunday, September 15,
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@sandimetz Sep 2013 bias away from dependencies 118 Sunday, September
15, 13

@sandimetz Sep 2013 bias towards collaboration 119 Sunday, September 15,
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@sandimetz Sep 2013 self interest identity/status authority order social sanctions
inherent sanctions ignorance habit 120 Sunday, September 15, 13

@sandimetz Sep 2013 9 signal cooperation 121 Sunday, September 15,
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@sandimetz Sep 2013 rules matter 122 Sunday, September 15, 13

@sandimetz Sep 2013 write better software 123 Sunday, September 15,
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@sandimetz Sep 2013 ﬁnd trustworthy humans 124 Sunday, September 15,
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@sandimetz Sep 2013 Thanks 125 Sunday, September 15, 13

@sandimetz Sep 2013 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 126 Sunday, September 15, 13

@sandimetz Sep 2013 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 127 Sunday, September 15, 13

http://poodr.com Sandi Metz @sandimetz @sandimetz Sep 2013 128 Sunday, September
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@sandimetz Sep 2013 Questions? 129 Sunday, September 15, 13

http://poodr.com Sandi Metz @sandimetz @sandimetz Sep 2013 130 Sunday, September
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Rules

Rules

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