Objects?

Question

what is objects? nd Constructors?
in JavaScript.....

Answer 1

if you have a constructor:
function Animal(legs, sound) {
this.legs = legs;
this.sound = sound;

// this is a method
this.makeSound = function() {
alert(this.sound);
}

}

or in an object:
var cat = {legs: 4, sound:"meow", makeSound: function() {alert(this.sound)}};

I'm not sure about the last one but I think if cat.makeSound will give an alert in both cases
(in the first one use var cat = new Cat(4, "meow"))

Answer 2

an object in JS is a variable with properties:
var cat = {legs: 4, sound:"meow"};
cat is an object in this example and it has 2 properties, 4 legs and a sound it makes.

A constructor is a function used to create an object, so if we want a constructor for our cat it could look like this:

function Animal(legs, sound) {
this.legs = legs;
this.sound = sound;
}

now we can use:
var cat = new Animal(4, "meow");
and we have the same object as the first example

Answer 3

Thank u for ur explanation....

Answer 4

what about object medhods??