shunwen

// XPath CheatSheet
// To test XPath in your Chrome Debugger: $x('/html/body')
// http://www.jittuu.com/2012/2/14/Testing-XPath-In-Chrome/


// 0. XPath Examples.
// More: http://xpath.alephzarro.com/content/cheatsheet.html


'//hr[@class="edge" and position()=1]'                // every first hr of 'edge' class

shunwen

Vagrant.configure("2") do |config|
  config.vm.hostname = "NODE NAME" # will be the node name on chef-server.
  config.vm.box = "BOX NAME"
  config.vm.box_url = "BOX IMAGE DOWNLOAD URL WHEN BOX DOES NOT EXIST"
  config.vm.boot_timeout = 180 # Raise error when bootup takes too long

  config.omnibus.chef_version = :latest # Use the latest chef version on this box

  #config.vm.network :private_network, ip: "33.33.33.10" # THIS CAUSES SSH PROBLEM, remove it

shunwen

def foo
  some_function(true, { :before => {a: 1},
                        :after => {b: 2} })
  call_block { do_something }
end

def bar
  case @var
  when 1
    print [1..42]

shunwen

# 1) Create your private key (any password will do, we remove it below)

$ cd ~/.ssh
$ openssl genrsa -des3 -out server.orig.key 2048


# 2) Remove the password

$ openssl rsa -in server.orig.key -out server.key

shunwen

require 'flickraw'
require 'mini_magick'
require 'parallel'

def get_photo_urls_from_photoset(flickr, photoset_id)
  total_pages = nil
  current_page = 1
  urls = []
  opts = {
    photoset_id: photoset_id,

shunwen

name 'base'
description 'Create users and sudoers, configure ssh, set timezone and swap'

run_list "recipe[apt]", "recipe[user::data_bag]", "recipe[base::bootstrap]",
         "recipe[build-essential]", "recipe[git]"

default_attributes(
  users: ['config'],
  authorization: {
    sudo: {

shunwen

mkdir test_prj
cd test_prj
 
berks init
      create  Berksfile
      create  Thorfile
      create  .gitignore
         run  git init from "."
      create  Gemfile
      create  Vagrantfile

shunwen

# See http://docs.opscode.com/config_rb_knife.html for more information on knife configuration options

current_dir = File.dirname(__FILE__)
log_level                :info
log_location             STDOUT
node_name                "YOUR OPSCODE USERNAME" # The actual name will be set when provisioning
client_key               "#{ENV['HOME']}/.chef/USERNAME.pem"
validation_client_name   "ORGANIZATION_NAME-validator"
validation_key           "#{ENV['HOME']}/.chef/ORGANIZATION_NAME-validator.pem"
chef_server_url          "https://api.opscode.com/organizations/ORGANIZATION_NAME"

shunwen

require 'json'
require 'csv'

SAMPLE_DATA = {"key1": "value1", "key2": "value2", "key3": "value3"}

headers = JSON.parse(SAMPLE_DATA).keys
input_lines = File.readlines "path/to/log/file"
parsed_line = 0

csv_file = CSV.open "path/to/file.csv", "w"

shunwen

module RomanNumeral

  VALUES_OF_LETTERS = { I: 1, V: 5, X: 10, L: 50, C: 100, D: 500, M: 1000 }
  MODERN_ROMAN_PATTERNS = { CM: 900, CD: 400, XC:90, XL: 40, IX: 9, IV: 4 }

  def self.i_to_old_roman int
    i_to_roman int, VALUES_OF_LETTERS
  end

  def self.i_to_modern_roman int