Takes people objects and returns full names

full_names.js

var Person = Class({ 
    initialize: function(first, last) {
        this.firstName = first;
        this.lastName  = last;
    },
    toString: function() {
        return "My name is "+this.firstName+" "+this.lastName+" .";
    }
}); 

var fullName = function(person_object) {
    full_name = person_object.firstName + " " + person_object.lastName;
    return full_name;
};

var fullNameArray = function(person_array) {
    name_array = [];
    person_array.forEach(function(person) {
        name = fullName(person);
        name_array.push(name);
    });
    return name_array;
};

var kali = new Person('Kali', 'Kiger');
console.log(kali.firstName); //displays "Kali"
console.log(kali.lastName); //displays "Kiger"
console.log(kali.toString()); //displays "My name is Kali Kiger"
console.log(fullName(kali)); // displays "Kali Kiger"

var ted = new Person('Theodore', 'Henderson');
var people = [kali, ted];

console.log(fullNameArray(people)); // returns ['Kali Kiger', 'Theodore Henderson']