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Object-Oriented Design

• Practical Object-Oriented Design in Ruby
• Growing Object-Oriented Software Guided by Tests

Ruby

• Confident Ruby
• Eloquent Ruby
• Ruby Under a Microscope

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class FullUrlValidator < ActiveModel::EachValidator
  VALID_SCHEMES = %w(http https)

  def validate_each(record, attribute, value)
    unless valid_full_url?(value)
      record.errors[attribute] << (options[:message] || 'is not a valid URL')
    end
  end

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# Compiled source #
###################
*.com
*.class
*.dll
*.exe
*.o
*.so

# Packages #

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# Set prefix to Ctrl-a
set -g prefix C-a
bind C-a send-prefix

# Unbind previous Ctrl-b prefix
unbind C-b

# Change default delay between keystrokes
set -s escape-time 1

zporter

Ruby

• Try Ruby
• Mr. Neighborly's Humble Little Ruby Book
• Rubymonk

Rails

• Rails for Zombies Redux
• Ruby on Rails Tutorial

zporter

defmodule Chop do
  def guess(actual, range = low..high) when actual >= low and actual <= high do
    _guess(actual, ask(div(low + high, 2)), range)
  end


  defp _guess(actual, actual, _) do
    IO.puts "\nYES! It is #{actual}\n"
  end

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class TrafficLight
  class Lamp
    %w(name color).each do |attr|
      define_singleton_method("#{attr}=") do |value|
        define_method(attr) { value }
      end
    end

    def to_s
      name

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class AuthConstraint
  def matches?(request)
    request.session['user_id'].present?
  end
end

Officegames::Application.routes.draw do
  constraints(AuthConstraint.new) do
    root :to => 'games#index'
  end

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require 'rack/deflater'

module Rack
  class Deflater
    class GzipStream
      def each(&block)
        @writer = block
        gzip  =::Zlib::GzipWriter.new(self)
        gzip.mtime = @mtime
        @body.each { |part|

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ActionView::Base.field_error_proc = Proc.new do |html_tag, instance|
  if html_tag =~ /<label[^>]+/
    "<div class='field_with_errors'>#{html_tag}".html_safe
  else
    "#{html_tag}</div>".html_safe
  end
end