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              //EXAMPLE 1 ==============
//Global variable greeting.
var greeting = 'hello';

function sayGreeting(){
	console.log('greeting:', this.greeting);
}

sayGreeting(); //hello
//In this context, `this` points to the object which invoked it, the global context, aka. window


//EXAMPLE 2 ==============
//Constructor French which stores a property, greeting
var French = function (greeting){
	this.greeting = greeting;
}

//Prototype which holds the method sayGreeting
French.prototype = {
  sayGreeting: function() {
    console.log('greeting:', this.greeting);
  }
}

//Create a new object, louis
var louis = new French('bonjour');

//Invoking louis.sayGreeting console.logs bonjour
//`this` points to the object which invoked it, aka louis
louis.sayGreeting() //bonjour


//EXAMPLE 3 ==============
//borrowedGreeting points to the method, louis.sayGreeting
var borrowedGreeting = louis.sayGreeting;

//Invoking borrowedGreeting console.logs hello
//`this` points to the object which invoked it, the global context, aka window
borrowedGreeting(); //hello

//Using .call() we can assign the `this` context of borrowedGreeting
borrowedGreeting.call(louis); //bonjour

            
          
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