Pseudo Classical Inheritance - Constructor Pattern

'use strict';

function Person(first_name, last_name) {
    this.first_name = first_name;
    this.last_name = last_name;
};

Person.prototype.full_name = function() {
  return this.first_name + ' ' + this.last_name;  
};

var person = new Person('Hafeez', 'Syed');

console.log(person.full_name());

function Professional(honorific, first_name, last_name) {
    Person.call(this, first_name, last_name);
    this.honorific = honorific;  
}

// Add `Inheritance` to make full_name() accessible to Professional
Professional.prototype = Object.create(Person.prototype);

Professional.prototype.professional_name = function() {
  return this.honorific + ' ' + this.first_name + ' ' + this.last_name;  
};

var profess = new Professional('Dr.', 'Hafeez', 'Syed');

console.log(profess.professional_name());
console.log(profess.full_name());