peter

require 'rubygems'
require 'debug_log'

my_list = [:a, :b, :c]
my_number = 5
debug.log("after variable initialization", "my_number", "my_list")
# => DebugLog | after variable initialization | my_number="5" (Fixnum), my_list="[:a, :b, :c]" (Array) | /Users/peter/tmp/debug-example.rb:6:in `foo'

peter

class ImportLegacyDevices < ActiveRecord::Migration
  def self.up
    return unless Rails.env.production?

    legacy_devices.each do |device_id, issue|
      if device = Device.find_by_hardware_id(device_id)
        unless InclusiveIssue.exists?(:issue_id => issue.id, :device_id => device.id)
          InclusiveIssue.create!(
            :issue => issue,
            :device => device,

peter

module NullifyTextAttributes
  def self.included(base)
    base.class_eval do
      before_validation :nullify_text_attributes

      private
      def nullify_text_attributes
        self.class.columns.select { |c| [:text, :string].include?(c.type) }.each do |column|
          send("#{column.name}=", nil) if read_attribute(column.name).blank?
        end

peter

# Traditional idiom
total = 1
[2, 3, 5].each do |value|
  total = total * value
end
puts total

# Ruby idiom
puts [2, 3, 5].inject { |mult, value| mult * value }

peter

def counts_from_dice(dice)
  dice.inject({}) do |hash, value|
    hash[value] ||= 0
    hash[value] += 1
    hash
  end
end

def score(dice)
  counts_from_dice(dice).inject(0) do |sum, (number, count)|    

peter

# 0. Make sure you have Ruby 1.9.3 installed, and optionally RVM and PostgreSQL

# 0.2 If you are on the Mac, make sure you have a c compiler by installing XCode Command Line Tools or gcc4.2 with homebrew
# https://github.com/mxcl/homebrew/wiki/Custom-GCC-and-cross-compilers

# 0.5 Make sure you have bundler version ~> 1.2 as Rails depends on it
gem install bundler

# 1. Get edge Rails source (master branch)
git clone https://github.com/rails/rails.git

peter

# Poor man's identity map for reusing ActiveRecord objects and avoid fetching the same
# record multiple times from the database within a request or background job. The check method can
# be used to locate duplicate queries in development. The goal is to instantiate
# each ActiveRecord object only once. The Rails identity map is known to have issues:
# http://stackoverflow.com/questions/6905891/rails-3-1-identity-map-issues
class IdentityMap
  # Set one or more ActiveRecord objects in the map
  def set(*objects)
    objects.each do |object|
      map[key(object)] = object

peter

#################################################################
#
# File: lib/api.rb
#
#################################################################

require 'user' # ActiveRecord model

# Connect to the db
ActiveRecord::Base.establish_connection(ENV['DATABASE_URL'])

peter

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Hooking up the middleware with the express app
// In app.js
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

var forceSSL = require('../middleware/ssl').force(config.hostname);
if ('production' == app.get('env')) {
  app.use(forceSSL);
}

peter

# NOTE: There must be a better way to do this - help appreciated!

###############################################################
# uploaded_file.rb - utility class
###############################################################

class UploadedFile
  def self.size(file)
    uploaded?(file) ? file.size : nil
  end