puyo

require 'rubygems' rescue nil
require 'gosu'
require 'chipmunk'

class Array
  # e.g. [1,2,3].each_link yields [1,2], [2,3]
  def each_link
    prev = first
    self[1, size].each do |item|
      yield prev, item

puyo

# What is it with you people and your singletons?

class Hash
  def self.from_block(&block)
    Hash[*BlockBuilder.new(&block).collected]
  end
  
  class BlockBuilder
    attr_reader :collected

puyo

# Is there a preferred way to do it? A lot of people I see use inject, but it makes my eyes bleed.

x = [[1, 2], [3, 4]]

p x.inject({}) { |h, r| h[r[0]] = r[1]; h }
# {1=>2, 3=>4}

p Hash[*x.flatten]
# {1=>2, 3=>4}

puyo

describe 'rsync' do
  it 'should keep the latest version of a file' do
    system("mkdir -p d1 d2")
    begin
      system("echo 'This is the first version' > d1/file.txt")
      sleep 1 # ensure timestamps are different
      system("echo 'This is the second version' > d2/file.txt")
      system("rsync -ru d2/ dest/")
      system("rsync -ru d1/ dest/")
      File.read('dest/file.txt').should include('second version')

puyo

:javascript
  Shining.config({...})

#first
  %h1 Hi there world
  %p Yes this is a slide
  %p.step with a step
  :javascript
    // stuff for the first slide
  :css

puyo

  create_table "line_items", :force => true do |t|
    t.integer  "cost"
    t.boolean  "paid"
    t.integer  "order_id"
  end

  create_table "orders", :force => true do |t|
  end

# -----

puyo

gem 'haml-rails', '~> 0.3'
gem 'rails', '~> 3.1'

group :assets do
  gem 'compass', '~> 0.11'
  gem 'sass-rails',   '~> 3.1'
  gem 'coffee-rails', '~> 3.1'
  gem 'uglifier', '~> 1.0'
end

puyo

1.9.3-p125 :001 > 1.week
 => 7 days 
1.9.3-p125 :002 > Rails.version
 => "3.2.2" 
1.9.3-p125 :003 > 

puyo

#/usr/bin/env ruby

COLORS = [
  RED = "\e[01;31m",
  GREEN = "\e[01;32m",
  YELLOW = "\e[01;33m",
  BLUE = "\e[01;34m",
  PINK = "\e[01;35m",
  CYAN = "\e[0;36m",
  GRAY = "\e[01;30m",

puyo

#/usr/bin/env ruby

COLORS = [
  RED = "\e[01;31m",
  GREEN = "\e[01;32m",
  YELLOW = "\e[01;33m",
  BLUE = "\e[01;34m",
  PINK = "\e[01;35m",
  CYAN = "\e[0;36m",
  GRAY = "\e[01;30m",