Consider the following code:

class Positionable {
  locationX: number = 0;
  locationY: number = 0;
  moveTo(toX: number, toY: number) {
    this.locationX = toX;
    this.locationY = toY;

class Rotatable {
  orientation: number = 0;
  rotate(orientation: number) {
    this.orientation += orientation;

class MovingObject {
  locationX: number = 0;
  locationY: number = 0;
  orientation: number = 0;
    console.log(this.locationX, this.locationY);

function applyMixins(derivedCtor: any, baseCtors: any[]) {
  baseCtors.forEach(baseCtor => {
    Object.getOwnPropertyNames(baseCtor.prototype).forEach(name => {
      derivedCtor.prototype[name] = baseCtor.prototype[name];

applyMixins(MovingObject, [Positionable, Rotatable]);
let mover = new MovingObject();

Select the statements that are correct.

(Select all acceptable answers.)

MovingObject’s repeated attributes are necessary to have the correct behavior of the mixed-in code.
After the last line of code, rotate and moveTo can be called on mover.
The printPosition method still exists on MovingObject after applyMixins is called.
The MovingObject class could also be declared as an interface if it had no function definition.
After the call to applyMixins the orientation attribute will be added to the Positionable class.

TypeScript Mixins OOP Public


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