ashleygwilliams

Rack runs an instance of a class that implements the #call method, but it can also use several other "stand-alone" Rack apps before returning the response to your web-browser by passing the status, headers, and body to each new app, we can stack middleware between the server and the browser to manipulate the details of the request/response cycle. Think of it like a stack.

1. Create a directory called rack_middleware

2. cd into that directory and create the file app.rb

3. We're going to define our base Rack app in app.rb. We just need a class that implements a call method. Add a MyApp class that says hello, but doesn't set any headers. We'll add those later.

# app.rb

ashleygwilliams

require 'rack'

class MyApp #change this name
  def call(env)
    #some code goes here!
  end
end

Rack::Handler::WEBrick.run(MyApp.new, {:Port => 3000}) #you'll need to update this...

ashleygwilliams

#fill out this meal array with items and details hashes. make sure you have at least 5 items
ITEMS = [  "ITEM" => {:calories=> ??, :fat => ??, :carbs => ??, :protein=>},
          "ITEM" => {:calories=> ??, :fat => ??, :carbs => ??, :protein=>}

]

#here is a method that randomly makes you eat x portions of the food
def generatePortions
   portions = []
   rand(20).times do

ashleygwilliams

# create a new hash that has this structure
# {
#  "A" => "a"
#	"B" => "b"
#	...
#	"Z" => "z"
#}

#using a single each loop
#know that you can do (A..Z) and (a..z)

ashleygwilliams

JULIAN:
finish scraper for two types of site
read http://www.w3schools.com/sql/ << teach you how to build sql tables
port the scraper lib from the sinatra app to the rails app
pay attention to what your models are!!
tables = > columns :: models => attributes

what data am i scraping || what attributes does my model have || what columns should my table have
SCRAPER || RAILS || SQL

ashleygwilliams

def step1(x)
	if x==1 
		 puts "it was all a dream"
	end
	return 2
end

def step2(x)
	if x==2

ashleygwilliams

two things i want to accomplish in the next hour:
+ clarify the instructions for the enumerable labs
+ teach you guys about how to break problems down (in words)
+ in code (methods are your friend)

first things first:
+ how does everyone feel right now?
+ walls happen, perservere
+ when you don't understand the instructions, make your own and keep going because the solution is likely not going to be as different as if you had 

ashleygwilliams

myArray = [1,2,3,4,5]

myArray[0] = 1
myArray[1] = 2

myArray.each do |arr|
  puts arr
end

myHash = {"a"=>1, "b"=>2, "c"=>3, "d"=>4, "e"=>5}

ashleygwilliams

#ITEMS = [  {"AVOCADO" => {:price => 3.00, :clearance => true}},
#           {"KALE" => {:price => 3.00,:clearance => false}},
#           {"BLACK_BEANS" => {:price => 2.50,:clearance => false}},
#           {"ALMONDS" => {:price => 9.00, :clearance => false}},
#           {"TEMPEH" => {:price => 3.00,:clearance => true}},
#           {"CHEESE" => {:price => 6.50,:clearance => false}},
#           {"BEER" => {:price => 13.00, :clearance => false}},
#           {"PEANUTBUTTER" => {:price => 3.00,:clearance => true}},
#           {"BEETS" => {:price => 2.50,:clearance => false}}]
#

ashleygwilliams

##create a hash that includes counts as a key for each item
myCart.each do |item|
  myNewCart[item]||= {} #[{item}, {item}] => {{item}=>{}, {item}=>{}}
	myNewCart[item][:count] ||= 0 #{{item}=>{:count=>0}, {item}=>{:count=>0}}
	myNewCart[item][:count] += 1 #{{item}=>{:count=>+=1}, {item}=>{:count=>+=1}}
end