phlipper

require "json"
require "open-uri"

url = "http://cloud-images.ubuntu.com/locator/ec2/releasesTable"

json_string = open(url).read
json_string.slice!(-6)  # remove trailing comma, invalid json :\

collection = JSON.load(json_string)["aaData"].inject([]) do |arr, row|
  # ["us-west-2", "raring", "13.04", "i386", "instance-store", "20130706", "<a href=\"https://console.aws.amazon.com/ec2/home?region=us-west-2#launchAmi=ami-658e1d55\">ami-658e1d55</a>", "aki-fa37baca"]

phlipper

# ruby-install
ruby_install_version = node["ruby_install"]["version"]
ruby_install_url     = "https://github.com/postmodern/ruby-install/archive/v#{ruby_install_version}.tar.gz"
ruby_install_dir     = "ruby-install-#{ruby_install_version}"
ruby_install_tar     = "#{ruby_install_dir}.tar.gz"

execute "Install ruby-install" do
  cwd "/tmp"
  command <<-EOC
    curl -Lo #{ruby_install_tar} #{ruby_install_url} &&

phlipper

# use capslock+a for the prefix key
set -g prefix C-a

# unbind initial prefix key to use later
unbind C-b

# more responsive default delay for vim
set -sg escape-time 1

# tmux-pasteboard

phlipper

• Codecademy
• CodeQuizzes
• Confreaks
• IA-Contest
• Learn Ruby the Hard Way
• Practicing Ruby
• Pragmatic Programmer
• Rails Best Practices
• Rails for Zombies
• Railscasts

phlipper

class ExponentialBackoff
  def initialize(initial, max)
    @initial = initial
    @max = max
    @current = initial
    @step = 0
  end

  def reset

phlipper

class Collateral < AR::B
  has_attached_file :movie, url: "/uploads/:attachment/:id/:cache_key/:filename"
end

phlipper

minitest is a great testing library and factory_girl is a handy fixture replace library, especially when working with Rails.

It can get tedious to repeat FactoryGirl. for every invocation of build, create, etcetera. Here is a handy shortcut to help reduce your Carpal Tunnel pain:

# for Test::Unit assertion style
class MiniTest::Rails::ActiveSupport::TestCase
  include FactoryGirl::Syntax::Methods
end

phlipper

source :rubygems

gem "rails"
gem "pg"
# ...

phlipper

first = [1, 2, 3]
# => [1, 2, 3]

middle = [4, 5, 6]
# => [4, 5, 6]

last = [7, 8, 9]
# => [7, 8, 9]

all = [*first, *middle, *last]

phlipper

def foo(a, *b, c)
  puts [a, b, c].inspect
end

foo(1, 2, 3, 4, 5)
# => [1, [2, 3, 4], 5]