Ruby Coding Dojo - Speaker Deck

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Ruby Coding Dojo RailsConf 2014

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Carlos Souza @caike David Rogers @al_the_x

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! Developers To All beginner, intermediate and expert.

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Technology! … in the open source community. Gets Better

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every week to the Ruby on Rails repository ~100 commits

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Getting Better not enough time invested in practice. We Are Not

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– Bruce Lee “Practice, yo.”

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WORK PRACTICE !=

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DOJO ಓ ৔ A Japanese term for place of the way.

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KATAs “Detailed choreographed patterns of movements praticed either solo or in pair.” Dave Thomas @PragDave

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KATAs “Detailed choreographed patterns of movements praticed either solo or in pair.” Test Driven! Development

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KATAs “Detailed choreographed patterns of movements praticed either solo or in pair.” Pair! Programming

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• Randori • Prepared • Code Retreat KATAs

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RANDORI

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RANDORI 1 Computer + 1 Projector + Audience (5-15 people) + Pair Rotation

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PREPARED

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PREPARED Watch someone perform a Kata that has been previously worked on.

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CODE RETREAT A day-long event where you work on the same problem, pair programming with different people and switching languages. Corey Haines @CoreyHaines http://coderetreat.org

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PREPARED KATA

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Calculator • addition • accept 2 numbers • return result

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BREAK

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PROBLEM #1 • Groups of 3 • 3:00 minute rotation

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ETIQUETTES • RED GREEN REFACTOR! • No talk on RED • If you are not coding, keep quiet. • If you have a idea, show it with code. • NO VOODOO: keep it simple. • If you are stuck, ask for help.

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Calculator • 1 operation: Addition • takes n numbers • don’t use inject

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require 'minitest/unit' require 'minitest/autorun' ! class CalculatorTest < MiniTest::Unit::TestCase ! def test_adds_two_numbers end ! end while true; do ruby test.rb; sleep 2; done test.rb bash

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RETROSPECTIVE

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PROBLEM #2 • Groups of 3 • 3:00 minute rotation

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StringCalculator • 1 operation: Addition • takes Strings! ! calc.add('one', 'two')