Javascript Inheritance.js

var Student = function(name, course, pace) {
  this.name = name;
  this.course = course;
  this.pace = pace;
  
  this.printStudent = function() {
    console.log(this.name, this.course, this.pace);
  }
}

Student.prototype.printStudent = function() {
    console.log(this.name, this.course, this.pace);
}

// Student.printStudent(); // BAD, don't do this.

var me = new Student("Dean", "frontend", "18-week");
me.printStudent();

// This is a class method rather than an instance method
Student.printClass = function() {
  return "Student";
}

// me.printClass() // bad
Student.printClass() // Correct.


// How we get standard inheritance

// This creates a GradStudent that has the same properties as a Student.
var GradStudent = function() {
  // Same as calling super();
  // Calls the constructor of my parent class.
  Student.call(this);
}

// Setting the parent of gradstudent to student.
// Do that by setting the prototypes equal to each other.
GradStudent.prototype = Object.create(Student.prototype);

var john = new GradStudent("John", "test", "24-week");

// Even though "name" is defined in student, grad student now has a "name"
// property because of the inheritance.
if (GradStudent.hasOwnProperty("printStudent")) {
  // console.log("Grad student had property we were looking for");
  john.printStudent();
}