stuart-d2
12/30/2014 - 1:47 PM

Create Javascript Object : new Notation and Constructor Functions • constructor function will be used as the blueprint when creating new

Create Javascript Object : new Notation and Constructor Functions • constructor function will be used as the blueprint when creating new instances with the new kw • Constructor function special b/c you can refer to an instance by using the this keyword.
• Convention to use uppercase at the beginning of a constructor function -- e.g., Car.

    • Ea instance has speed and type properites and a function called drive.  
    • this keyword used to create the instance properties for each instance, each car.  
    • Ea instance of car will have its own instance of drive function.  
    • For creating "static" functions -- a function that is singular, persists, can be used by all objects-- use prototype.
Create Javascript Object - new Notation and Constructor Functions.js
content_copyfile_download
function Car(type) {
	this.speed = 0;
	this.type = type || "No type";
	this.drive = function(newSpeed) {
		this.speed = newSpeed;
		}
	}

//creating a new instance of the Car object, the bmw.   
var bmw =new Car("BMW");
console.log(bmw.speed);  // outputs 0
console.log(bmw.type); // outputs "BMW"
bmw.drive(80);

console.log(bmw.speed);  // outputs 80