Inheritance Homework

Inheritance Homework.js

// 1. Write a class to support the following code:

// var thomas = new Person('Thomas');
// var amy = new Person('Amy');
// 
// thomas.name // --> "Thomas"

// 2. Add a getName() method to all Person objects, that outputs
// the persons name.

//..thomas.getName() // --> "Thomas"

// 3. Write a statement that calls Thomas's getName function,
// but returns "Amy".

// 4. Remove the getName() method from all Person objects.

var Person = function(name) {
    this.name = name;
};

Person.prototype.name = 'Amy';
Person.prototype.getName = function() {
    return this.name;
};

var thomas = new Person('Thomas');
var amy = new Person('Amy');

console.log(thomas.name);
console.log(amy.name);
console.log(thomas.getName());
console.log(amy.getName());

thomas.getName = function() {
    return this.constructor.prototype.name;
};

console.log(thomas.getName());

/* Before delete getName */
console.log('getName' in amy);
console.log('getName' in thomas);
console.log('getName' in Person.prototype);

var people = [amy, thomas];
for (i = 0; i < people.length; i++) {
    var person = people[i];
    if (person.hasOwnProperty('getName')) {
        delete person.getName;
    }
    if ('getName' in person) {
        delete person.constructor.prototype.getName;
    }
}

/* After delete getName */
console.log('getName' in amy);
console.log('getName' in thomas);
console.log('getName' in Person.prototype);