JoshCheek

module Itinerary
  
  class Day
    def initialize(date,&block)
      @date = date
      instance_eval(&block)
    end
    def readings
      @readings ||= Array.new
    end

JoshCheek

# script to build a web page that shows the links contained on pages at source urls
# an example solution for the question at http://www.ruby-forum.com/topic/521021


# if these change frequently, it might be better to read them from a file
# rather than store them in the source
urls = [
  'http://www.google.com/',
  'http://weatherflash.com/usa/ks/wichita/',
  'http://umbrellatoday.com/',

JoshCheek

def exp_and_msg
  return 1 , "hi"
end

exp , msg = exp_and_msg
exp # => 1
msg # => "hi"

JoshCheek

#!/usr/bin/env ruby

# probably need to $ gem install doublehelix
require "doublehelix"

 GC
A--T
C---G
G----C
 A----T

JoshCheek

switch = 0
stay = 0

100_000.times do
  doors = [ :goat , :goat , :goat , :car ].shuffle
  
  guess = rand doors.size
  
  if doors[guess] == :car
    stay += 1

JoshCheek

switch = 0
stay = 0

100_000.times do
  doors = [ :goat , :goat , :goat , :car ].shuffle
  
  guess = rand doors.size
  
  if doors[guess] == :car
    stay += 1

JoshCheek

# While watching Rick DeNatale's talk at RubyConf
#   http://confreaks.net/videos/461-rubyconf2010-objects-are-just-objects-aren-t-they
# he shows how SICP introduces cons as lambdas.
# I thought the idea was interesting, so decided to try it out. Done here in Ruby.

def cons head , tail
  cons = ->(which) { which == :head ? head : tail }
  def cons.inspect(is_head=true)
    car = car(self).inspect
    cdr = cdr(self).inspect

JoshCheek

# http://www.ruby-forum.com/topic/860689

def ask question
  goodAnswer = false       # The Ruby idiom is to use snake_case for variables
  while (not goodAnswer)   # here, I would say "until goodAnswer"
    puts question
    response = gets.chomp 
    attack = rand(11)
    attacker = rand(11)

JoshCheek

--- 
- :category: cat1
  :items: 
  - item1
  - item2
  - item3
- :category: cat2
  :items: 
  - item1
- :category: cat3

JoshCheek

# Lets create a simple calculator app together, it should have a get method for localhost:4567/calculator that displays two forms
# the first form should post (note that post is one of those http methods) to localhost:4567/add, and have two fields named "num1" and "num2"
# the second form should post to localhost:4567/subtract with the same args
# the page that they go to should display the result, and have a link to get back to calculator

require 'rubygems'
require 'sinatra'

get '/calculator' do
'