TypeScript add Object to array with push

Question

I would just like to add an object of an class (Pixel) to an array.

export class Pixel {   constructor(x: number, y: number) {} } 

The class has the following attribute:

pixels: Pixel[] = []; 

The following code looks logical for me, but does not push the actual objects to my array pixels.

this.pixels.push(new Pixel(x, y)); 

Only this works:

var p = {x:x, y:y}; this.pixels.push(p); 

Could anybody explain me why the above statement does not work?

Answer 1

If your example represents your real code, the problem is not in the push, it's that your constructor doesn't do anything.

You need to declare and initialize the x and y members.

Explicitly:

export class Pixel {     public x: number;     public y: number;        constructor(x: number, y: number) {         this.x = x;         this.y = y;     } } 

Or implicitly:

export class Pixel {     constructor(public x: number, public y: number) {} }