sranso

class FakeArray
  attr_reader :info

  def initialize
    @info = ["puppies", "kittens", "baby sloths", "puppies"]
  end

  def each
    @info.each do |element|
      yield element if block_given?

sranso

(rdb:1) Dog.find_by_id(13)
#<Mysql2::Result:0x007fd2329a2c50 @query_options={:as=>:hash, :async=>false, :cast_booleans=>false, :symbolize_keys=>false, :database_timezone=>:local, :application_timezone=>nil, :cache_rows=>true, :connect_flags=>2147525125, :cast=>true, :default_file=>nil, :default_group=>nil, :host=>"localhost", :username=>"root", :database=>"dogs"}>

sranso

(rdb:1) Dog.find_by_id(13).first
{"id"=>13, "name"=>"sara", "color"=>"red"}

sranso

...
  def self.find_by_id(id)
    results = self.db.query ("
      SELECT *
      FROM dogs
      WHERE id = #{id}
    ")
  end
...

sranso

/* descendant selector */
ul li {
  color: purple;
}
/* child combinator selector */
ul > li {
  text-transform: uppercase;
}
/* adjacent sibling combinator */
p + p {

sranso

# in config/routes.rb
RailsSampleApp::Application.routes.draw do
  resources :posts
  #   SHORTCUT VERB   ROUTE                     CONTROLLER#ACTION
  #      posts GET    /posts(.:format)          posts#index
  #            POST   /posts(.:format)          posts#create
  #   new_post GET    /posts/new(.:format)      posts#new
  #  edit_post GET    /posts/:id/edit(.:format) posts#edit
  #       post GET    /posts/:id(.:format)      posts#show
  #            PUT    /posts/:id(.:format)      posts#update

sranso

class App < Sinatra::Application

  get '/' do
    @meal = Mealtime.new(Time.now)
    erb :index
  end

end

sranso

/* JavaScript example of loose typing */
var a = "twenty two"; // String delcaration
var b = 22; // Number declaration

/* ActiveRecord example of strong typing */
create_table do |t|
  t.string name
  t.integer age
end

sranso

var a = "sarah";
function dance_with_gus(some_var){ 
  a = "gus";
  return(some_var + " dances with " + a );
}
// "gus dances with gus"

var a = "sarah";
function dance_with_gus(some_var){ 
  var a;

sranso

Perform these exercises in the JavaScript console of your favorite web browser.

What does the following expression return?
> 3 + 2;

5
=============================================================
What does the following expression return?
> typeof(3);