JSInheritanceExercises

jsinheritanceexercises.markdown

JSInheritanceExercises

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script.js

// 1 - Create a constructor function for a Vehicle. Each vehicle should have a make, model and year property.
function Vehicle(make,model,year) {
	this.make=make;
	this.model=model;
	this.year=year;
}
// 2 - Add a function to the Vehicle prototype called start which returns the string "VROOM!"
Vehicle.prototype.start = function(){
	return 'VROOM!';
};
// 3 - Add a function to the Vehicle prototype called toString which returns the string "The make, model, and year are" concatenated with the make, model and year property

Vehicle.prototype.toString=function() {
	return "The make, model, and year are "+this.make+" "+this.model+" "+this.year;
};

/* Examples 
    var vehicle = new Vehicle("Tractor", "John Deere", 1999)
    vehicle.toString() // 'The make, model, and year are Tractor John Deere 1999'
*/

// 4 - Create a constructor function for a Car. Each object created from the Car function should also have a make, model, and year and a property called numWheels which should be 4. The Car prototype should inherit all of the methods from the Vehicle prototype

function Car(make,model,year,numWheels) {
	Vehicle.call(this,make,model,year); 
	this.numWheels=4;
}

Car.prototype = Object.create(Vehicle.prototype);
Car.prototype.constructor=Car;

// 5 - Create a constructor function for a Motorcycle. Each object created from the Motorcycle function should also have a make, model, and year and a property called numWheels which should be 2. The Motorcycle prototype should inherit all of the methods from the Vehicle prototype

function Motorcycle(make,model,year,numWheels) {
	Vehicle.call(this,make,model,year); 
	this.numWheels=2;
}

Motorcycle.prototype = Object.create(Vehicle.prototype);
Motorcycle.prototype.constructor=Motorcycle;