jgarber

set background=dark
set guifont=Menlo\ for\ Powerline:h14
colorscheme solarized
set guioptions=egmt

let &colorcolumn=join(range(80,999),",")

jgarber

GOOD_VERSIONS = %w[1.8.7p375 1.9.2p321 1.9.3p484 2.0.0p353]
apps = `heroku apps`.split("\n")
apps.each do |app|
  next if app.include? "My Apps"
  app = app.split(" ")[0]
  output = `heroku run "ruby -v" -a #{app} 2>&1`
  match = output.match(/ruby ([\d.p]+)/)
  version = match ? match[1] : "unknown"
  puts "#{app}\t#{version}\t#{GOOD_VERSIONS.include?(version) ? "OK" : "UPGRADE"}"
end

jgarber

namespace :bundle do

  def intersection
    return @outdated if @outdated
    @outdated = `bundle outdated`
    @outdated = @outdated.split("\n").select{|line| line.include?("*")}
    @outdated = @outdated.map{|gem| gem.match(/\* ([a-zA-Z0-9_-]+) /)[1]}

    app_gems = File.readlines("Gemfile").select{|line| line.include?("gem ")}
    app_gems = app_gems.map{|gem| gem.match(/gem '([a-zA-Z0-9_-]+)/)[1]}

jgarber

Ruby

• Ruby Language site
• Try Ruby
• RubyGems – Gems are Ruby’s packages
• Bundler – Application dependency management
• RubyInstaller – Easy installation on Windows.
  • You will want to check the box to add Ruby to your PATH
  • You may also want to install the Development Kit so you can compile C extensions
• Rubular – Online Ruby regular expression tester

jgarber

2.0.0p247 :001 > a = [1, 2]
 => [1, 2]
2.0.0p247 :002 > a[1]
 => 2
2.0.0p247 :003 > a[2]
 => nil
2.0.0p247 :004 > a[1,1]
 => [2]
2.0.0p247 :005 > a[2,1]
 => []  ## <- Why is this not nil?

jgarber

def make_one_dimensional(input = {}, output = {}, prefix = nil)
  if input.respond_to?(:each)
    input.each do |key, value|
      key = [prefix, key].compact.join('.')
      case value
      when Hash
        make_one_dimensional(value, output, key)
      when Array
        value.each_with_index do |v, index|
          array_key = "#{key}[#{index}]"

jgarber

require 'json'

def replace_json(node, &replacement_action)
  case node
  when Hash
    node.each_value do |item|
      yield item
      replace_json(item, &replacement_action)
    end
  when Array

jgarber

run_list(
  'recipe[chef-solo-search]',
  'recipe[rails_application]'
)

default_attributes(
  rails: {
    app: {name: "sample_app"},
    deploy: {
      repository: "https://github.com/jgarber/sample_app_2nd_ed.git"

jgarber

ssh-copy-id pi@192.168.X.X

# on the pi
sudo su -
cat <<EOF >> /etc/wpa_supplicant/wpa_supplicant.conf
network={
    ssid="Your SSID Here"
    proto=RSN
    key_mgmt=WPA-PSK
    pairwise=CCMP

jgarber

The original:

Father-Daughter Talk
A young woman was about to finish her first year of college. Like so many others her age, she considered herself to be a very liberal Democrat, and was very much in favor of the redistribution of wealth. She was deeply ashamed that her father was a rather staunch Republican, a feeling she openly expressed. Based on the lectures that she had participated in, and the occasional chat with a professor, she felt that her father had for years harbored an evil, selfish desire to keep what he thought should be his.

One day she was challenging her father on his opposition to higher taxes on the rich and the addition of more government welfare programs. The self-professed objectivity proclaimed by her professors had to be the truth and she indicated so to her father. He responded by asking how she was doing in school. Taken aback, she answered rather haughtily that she had a 4.0 GPA, and let him know that it was tough to maintain, insisting that she was taking a very difficult cours