avit

# Goal: split responsibilities of count and grouped_count so they are responsible for returning
#       count => Fixnum and grouped_count => Hash in all cases
#
# This option removes original calculation options for count(:group => x)
# in favour of grouped_count(:group => x)
#
# (I'm showing count and average as examples of optional & required column_name params, 
# but this would apply to all calculation methods.)

relation = Post.group("author_id").order("created_at")

avit

class MyMailer < ActionMailer::Base

  def notice(user)
    # ...
    mail(to: @to, from: @from, subject: @subject) do |format|
      format.html { render text: @html_content }
      format.text { render text: @text_content }
    end
  end
end

avit

class Army < AR:B
  has_many :robots
  has_many :weapons
end

class Robot < AR:B
  belongs_to: :army
  has_one :weapon
end

avit

describe Rate do
  it "can do arithmetic" do
    total = Rate.new(amount: 100.00) + Rate.new(amount: 200.00)
    total.should == 300.00
  end
end


class Rate < ActiveRecord::Base
  attr_accessible :amount

avit

gem 'activerecord', '4.0.0.beta'
require 'active_record'
require 'logger'

ActiveRecord::Base.logger = Logger.new(STDOUT)
ActiveRecord::Base.logger.level = Logger::INFO
ActiveRecord::Base.establish_connection( :adapter  => 'sqlite3',
                                         :database => ':memory:' )

ActiveRecord::Schema.define do

avit

class NilObject
  def true?;    false end
  def false?;   true end
  def nil?;     true end
  def blank?;   true end
  def present?; false end
  def empty?;   true end
  def to_s;     "" end
  def !;        true end

avit

# Regex with two named captures both named "word"
r = %r{
  (?<word>[a-z]+)\s+
  (?<word>[a-z]+)
}xi

m = r.match("one two")
# => #<MatchData "one two" word:"one" word:"two">

m.captures

avit

class ArticlesController < ActionController::Base
  def show
    @article = Article.find(params[:id])
    # ... bunch of stuff to set up template display
  end
end

avit

class PostsController < ApplicationController
  caches_page :index

  def index
    render text: "html!"
  end
end

avit

#!/usr/bin/env ruby
#^syntax detection

site 'http://community.opscode.com/api/v1'

cookbook 'application_nginx'
cookbook 'application_ruby'
cookbook 'apt'
cookbook 'git'
cookbook 'imagemagick'