intermediate_js_code.js

// class notes: https://github.com/DelmerGA/intermediate_talk
// javascript in one pic: https://github.com/coodict/javascript-in-one-pic

// Our code to do something a random number of seconds later

var fullName = function(args){
  return args.firstName + " " + args.lastName;
};

var joke = function(args){
  return "I'm against picketing but I don't know how to show it." + " " + args.crowdReaction
}

var random = function(low, high){
    var low = low * 1000
    var high = high * 1000
    return Math.floor(Math.random() * (high - low + 1)) + low;
};

var tellMeLater = function(callback, args){
  args = args || {}
  setTimeout( function(){ console.log( callback(args))}, random(2,5));
};
var joke_params = {crowdReaction: "BOOOOO!!!!!"}

tellMeLater(joke, joke_params);

var person = {firstName: "Michael", lastName: "Jackson"}

tellMeLater(fullName, person);

// Basic Constructor Function
function Person (first, last) {
  // set firstName and lastName
  this.firstName = first;
  this.lastName = last;
}

var myPerson = new Person("Michael", "Jackson");

console.log(myPerson.firstName)

// Basic Prototype Usage

function SuperHero(name, alterEgo){
  this.name = name;
  this.alterEgo = alterEgo;
}

SuperHero.prototype.superPunch = function(){
  console.log("WHAMMM!!!!")
}

var myHero = new SuperHero("Robo Dude", "Alex")
// console.log(myHero.alterEgo);
// myHero.superPunch();

function Robot(name, purpose){
  this.name = name;
  this.purpose = purpose;
}

Robot.prototype.greet = function(){
  console.log("Beep boop");
};

niceRobot = new Robot("Wallee", "collect garbage")
myRobot = new Robot("HAL", "Protect the mission");

myRobot.purpose = "Kill everyone" 

console.log(myRobot.purpose)


console.log(niceRobot.purpose)

// Basic Inheritence Example
function Animal(){
  this.alive = true;
};

function Mammal(){
  this.blood = "warm"
};

function Cat(){

};

function Reptile(){
  this.blood = "cold"
};

function KommodoDragon(){

};

Cat.prototype = new Mammal();
Reptile.prototype = new Animal();
KommodoDragon.prototype = new Reptile();



grimm = new Cat();
puff  = new KommodoDragon();

console.log(grimm.blood);
console.log(puff.alive);

console.log(Cat.prototype.constructor );

// testing using Mocha

// the assert library built into node
var assert = require("assert");

/*
   describe doesn't really do much,
   beyond running the code in the
   function it's given
*/

/*
  note we are using describe to
  group a set of tests all related
  to the Arrays
*/
describe('Array', function(){
  /*
     here we use a describe to
     indicate another group of
     tests, but yet again it isn't
     doing anything really
  */

  /*
    we are trying to describe a
    group of tests related to
    the Array#indexOf method
  */
  describe('#indexOf()', function(){
    /*
      the it method does all the work
      in mocha, it takes a message to
      print if the test fails for a
      behavior
    */

    /*
      here we are trying to that
      Array.indexof behaves well
      when values are not in the
      array.
    */
    it('should return -1 when the value is not present', function(){
      // We are using assert to throw errors if something is wrong
      assert.equal(-1, [1,2,3].indexOf(5));
      assert.equal(-1, [1,2,3].indexOf(0));
    })
  })
})