JS Using prototype function in prototype

Question

Hey i'am writing a little object :

function Point(x, y) {
 this.x = x;
 this.y = y;
 this.angle = Math.sqrt(x * x + y * y);
 this.radius = Math.atan(y / x);
};
Point.prototype = {
 constructor: Point,
 calculateRadius: function(x, y) {
 return Math.sqrt(x * x + y * y);
 },
 calculateAngle: function(x, y) {
 return Math.atan(y / x);
 },
 cartToRad: function(x, y) {
 this.radius = calculateRadius(x, y);
 this.angle = calculateAngle(x, y);
 }
};
var coords = new Point(0, 0);
coords.cartToRad(5, 0.523);

And that throw an error:

ReferenceError: calculateRadius is not defined.

Is it possible to use prototype functions in other prototype functions?

Answer 1

You need to reference them as properties of this, just like any other property.