What is the difference between them and which one is more recomended?

Hey,

The following two constructor functions do the same job. But what is the difference between them and which one is more recomended?

First function

Code:

Code:

---

// we define a constructor for Person objects
function Person(name, age, isDeveloper) {
    this.name = name;
    this.age = age;
    this.isDeveloper = isDeveloper || false;

    this.writesCode = function() {
      console.log(this.isDeveloper? "This person does write code" : "This person does not write code");
    }
}

var person1 = new Person("Bob", 38, true);
var person2 = new Person("Alice", 32);

// prints out: This person does write code
person1.writesCode();
// prints out: this person does not write code
person2.writesCode();

---

Second function
Code:

Code:

---

// we define a constructor for Person objects
function Person(name, age, isDeveloper) {
    this.name = name;
    this.age = age;
    this.isDeveloper = isDeveloper || false;
}

// we extend the function's prototype
Person.prototype.writesCode = function() {
    console.log(this.isDeveloper? "This person does write code" : "This person does not write code");
}

var person1 = new Person("Bob", 38, true);
var person2 = new Person("Alice", 32);

// prints out: This person does write code
person1.writesCode();
// prints out: this person does not write code
person2.writesCode();

---