Question

Which is the correct code that returns a complex number that is the complex conjugate of this one?

(a) Complex.prototype.conj = function() { return new Complex(this.r, -this.i); };

(b) Complex.prototype.conj = function() { return Complex(this.r, -this.i); };

(c) Complex.prototype.conj = function() { return (this.r, -this.i); };

(d) Complex.prototype.conj = function() { new Complex(this.r, -this.i); };

I got this question in exam.

My doubt stems from Augmentation of Classes topic in division Classes and Modules in JavaScript of JavaScript

Answer 1

The correct answer is (a) Complex.prototype.conj = function() { return new Complex(this.r, -this.i); };

Explanation: Object.prototype.constructor specifies the function that creates the object prototype. The above code snippet returns a complex number that is the complex conjugate of this one.