slide3_js_objliterals.js

//object literal notion
var my_obj = {
  attr1: 'hello',
  attr2: 'what'
};

//data is accessible by using keyword via dot notation...
my_obj.attr1; // => 'hello'

//...or brackets
my_obj['attr1'];

//all objects have a __proto__ property
my_obj.__proto__; // => {}

//we can add properties to __proto__
my_obj.__proto__.attr0 = 'wow';
my_obj.__proto__; // => { attr0: 'wow' }

// ...and my_obj will inherit them
my_obj.attr0; // => 'wow'

//prototypes have prototypes
//if no prototype is specifcied, 
my_obj.__proto__.__proto__; // =>null

slide4.1_ruby_hashes.rb

# ruby hashes look nearly identical to js object literals
my_hash = {
  attr1: 'hello',
  attr2: 'what'
}

#can access values by using brackets
my_hash[:attr1] # => 'hello'Object.prototype is used

#inherits properties from a class
my_hash.class # => Hash

slide4.2_ruby_objects.rb

#To make an object in Ruby we need a class
class MyObject
  attr_accessor :attr1, :attr2
  
  def initialize(x, y)
    @attr1 = "x"
    @attr2 = "y"
  end

end

#Ruby objects are made using the new keyword
my_obj = MyObject.new("hello", "what")

class MyObject
  def quack
    puts "quack!"
  end
end

my_obj.quack # "quack!"

#Objects inherit from each other
my_obj.class #=> MyObject
My_Object.superclass #=> Object
Object.superclass #=> BasicObject
BasicObject.superclass #=> nil

slide6.1_js_protoinherit.js

function myClass() {
  this.array = [];
}

function myObject() {
  this.attr1 = "hello";
}

myObject.prototype = new myClass();

myObject.prototype.constructor = myObject;

var obj1 = new myObject, obj2 = new myObject;

obj1 // =>{ attr1: 'hello' }
obj1.array // =>[]
obj1.array.push(1);

obj2.array //=> [ 1 ]

slide7.1_ruby_objects.rb

#To make an object in Ruby we need a class
class MyObject
  attr_accessor :attr1, :attr2
  
  def initialize(x, y)
    @attr1 = "x"
    @attr2 = "y"
  end

end

#Ruby objects are made using the new keyword
my_obj = MyObject.new("hello", "what")

class MyObject
  def quack
    puts "quack!"
  end
end

my_obj.quack # "quack!"

#Objects inherit from each other
my_obj.class #=> MyObject
My_Object.superclass #=> Object
Object.superclass #=> BasicObject
BasicObject.superclass #=> nil

slide7.2_ruby_classes.rb

#To make an object in Ruby we need a class
class MyObject
  
  def initialize(x, y)
    @attr1 = "x"
    @attr2 = "y"
  end

end

#Classes are also objects and have their own inheritance tree
My_Object.class #=> Class
Class.superclass #=> Module
Module.superclass #=> Object
Object.superclass #=>BasicObject
BasicObject.superclass #=> nil