Code Is What Code Does - Speaker Deck

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Code Is What Code Does @brixen

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I <3 Ruby

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We live in a world filled with hard problems

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watsi.org

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People are leaving Ruby

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Haskell Go Clojure Scala Node.js Rust Javascript Elixir

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Businesses are not choosing Ruby

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Ruby has problems

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Too slow

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0 1.25 2.5 3.75 5 Rubinius v1 Rubinius JIT v1 Rubinius v2 MRI 2.1

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No concurrency

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0 1 2 3 4 Rubinius MRI 2.1

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Too much memory

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0 22.5 45 67.5 90 Hash 1 Hash 2

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Not compiled

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Monkey patching

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$ rbx! irb(main):001:0> "abc".clear! => ""! irb(main):002:0> require "./some_gem.rb"! => true! irb(main):003:0> "abc".clear! => "nope"! irb(main):004:0>

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irb(main):003:0> "abc".clear! => "nope"! irb(main):004:0> "abc".method :clear! => #! irb(main):005:0>

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Static types

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Why use static types?

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Correctness 1

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Adding types does not make correct code more correct

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Speed 2

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0 1.25 2.5 3.75 5 Rubinius v1 Rubinius JIT v1 Rubinius v2 MRI 2.1

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Maintenance 3

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Adding complexity does not improve understanding

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Ruby is a better choice

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Programming is too hard

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We are too slow

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We fail a lot

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The Cynefin framework

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Simple Sense • Categorize • Respond 1

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Simple Sense • Categorize • Respond 1 Best Practice

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Complicated Sense • Analyze • Respond 2

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Complicated Sense • Analyze • Respond 2 Good Practice

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Complex Probe • Sense • Respond 3

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Complex Probe • Sense • Respond 3 Emergent Behavior

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Chaotic Act • Sense • Respond 4

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Chaotic Act • Sense • Respond 4 Novel Solutions

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Clay vs concrete

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B.C. A.D.

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B.C. A.D. Before compilation After deployment

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Read Eval Print Loop

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Study Experiment Check Loop

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Assumptions help us solve problems

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Assumptions hinder our efforts

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Technical debt Cost to experiment

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Refactoring Rework

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We live in a world filled with hard problems

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Let's make programming easier

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Let's test our ideas more quickly

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Let's fail more productively

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Improve the world

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Try Rubinius github.com/rubinius/rubinius

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Thank you!

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• http://winstonyw.com/2013/06/12/reddotrubyconf_2013_-_thank_you/ • https://www.ﬂickr.com/photos/veganstraightedge/6037027106/ • http://www.europeancarweb.com/news/ epcp_1010_audi_e_tron_spyder_creation/photo_13.html • http://thisisbuildingmaterials.blogspot.com/2012/03/examples-of-famous- concrete-buildings.html Credits