# Javascript Data Structure Tutorial - Javascript Array of Objects

Arrays can consist of objects, and all the functions and properties of arrays work with objects.

## Example

``````
function Point(x,y) { // w ww .  j  a  v  a 2 s  .  c  o  m
this.x = x;
this.y = y;
}

function displayPoint(arr) {
for (var i = 0; i < arr.length; ++i) {
console.log(arr[i].x + ", " + arr[i].y);
}
}
var p1 = new Point(1,2);
var p2 = new Point(3,5);
var p3 = new Point(2,8);
var p4 = new Point(4,4);
var points = [p1,p2,p3,p4];
for (var i = 0; i < points.length; ++i) {
console.log("Point " + parseInt(i+1) + ": " + points[i].x + ", " + points[i].y);
}

var p5 = new Point(12,-3);
points.push(p5);
console.log("After push: ");
displayPoint(points);
points.shift();
console.log("After shift: ");
displayPoint(points);
``````

The code above generates the following result.

```Point 1: 1, 2
Point 2: 3, 5
Point 3: 2, 8
Point 4: 4, 4
After push:
1, 2
3, 5
2, 8
4, 4
12, -3
After shift:
3, 5
2, 8
4, 4
12, -3
```

## Arrays in Objects

In the following example, we create an object that stores the values.

Here is the code:

``````
function MyData() { //from  w w w  . j  a va2s  .  c o  m
this.dataStore = [];
this.average = average;
}

this.dataStore.push(temp);
}
function average() {
var total = 0;
for (var i = 0; i < this.dataStore.length; ++i) {
total += this.dataStore[i];
}
}

var myData = new MyData();