For the following assignment you'll be given descriptions of objects and some example code that clarifies how that object works. It's up to you to write the requisite classes, instantiate and test the given objects according to the examples!

1. Put work in the appropriately named file:
   • When prompted to define a class, write the class definition inside of a file with the same name as the class. (Example: A Unicorn class would be in a file named unicorn.js)
   • Be sure to export your classes

filename tenant.js

Create a tenant class to store tenant data and behavior. A tenant should have the following attributes:

Set at initialization:

• f_name
• l_name
• born_on
• gender

Set after instantiation with setter and getter methods:

• nickname
• occupation

Example Usage:

let p1 = new Tenant("Calvin", "Clifford", "male", "December 21st, 1929");
p1.nickname = "Bud";
p1.occupation = "Office Drone";

A tenant should have a full_name method that returns a string of their first name, last name and nickname (if they have one).

Example Usage:

let p1 = new Tenant("Calvin", "Clifford", "male", "December 21, 1929");
p1.nickname = "Bud";
p1.full_name // "Calvin 'Bud' Clifford";

filename apartment.js

An apartment should have the following attributes:

Set at initialization:

• unit
• num_beds
• num_baths
• tenants (the collection of people renting the apartment)

Example Usage:

let a1 = new Apartment("B", 2, 1);
a1.tenants // [];
a1.tenants.length // 0;

An apartment's price should be dynamically calculated based on the number of beds ($1000 per bed) and the number of bathrooms ($500 per bathroom).

Example Usage:

let a2 = new Apartment("A", 2, 1);
a2.price // "$2500"

An apartment should have a predicate method to determine if it's a studio (has only one bedroom).

Example Usage:

let a1 = new Apartment("B", 2, 1);
let a2 = new Apartment("A", 1, 1);
a1.isStudio() // false
a2.isStudio() // true

An apartment should have several methods related to its tenants.

moveIn should take a tenant object as input and add it to the list of tenants.

Example Usage:

let a1 = new Apartment("B", 1, 1)
let p1 = new Tenant("Fran", "Kubelik", "female", "May 8, 1935")
a1.moveIn(p1)
a1.tenants // [ Tenant ] // an array of tenant instances
typeof a1.tenants    // Array
a1.tenants[0].constructor // Tenant
a1.tenants.length   // 1

isEmpty should return true if an apartment doesn't have any tenants and false if it has tenants.

Example Usage:

let a1 = new Apartment("B", 1, 1);
a1.isEmpty() // true
let p1 = new Tenant("Fran", "Kubelik", "female", "May 8, 1935")
a1.moveIn(p1)
a1.isEmpty() // false

isFull should return true if the number of tenants in an apartment is equal to the number of bedrooms.

Example Usage:

let a2 = new Apartment("B", 2, 1);
let p1 = new Tenant("Al", "Kirkeby", "male", "January 23, 1949");
let p2 = new Tenant("Karl", "Matuschka", "male", "June 27, 1949");
a2.isEmpty(); // true
a2.isFull();  // false
a2.moveIn(p1);
a2.isEmpty(); // false
a2.isFull();  // false
a2.moveIn(p2);
a2.isFull();  // true

If you try to add more tenants than an apartment's bedrooms you'll throw an new error with the message "Full! <TENANT NAME> can't move in!"

Example Usage:

let p1 = new Tenant("Mildred", "Dreyfuss", "female", "July 18, 1942")
let p2 = new Tenant("Jeff", "Sheldrake", "male", "November 18, 1941")
let p3 = new Tenant("Joe", "Dobisch", "male", "May 17, 1939")
let a3 = new Apartment("F", 2, 1)
a3.moveIn(p1)
a3.moveIn(p2)
a3.isFull() // true
a3.moveIn(p3)  // Uncaught Error: "Full! Joe Dobisch can't move in"
a3.tenants.size // 2

filename building.js

A building should have the following attributes:

At initialize:

• address
• number of floors

With getters and setters:

• apartments

Example Usage:

let b1 = new Building("208 Leonard St", 3);
b1.apartments // {}

Define an instance method called add that takes the floor number and an apartment object as inputs and adds that apartment to the specified floor.

Example Usage:

let a1 = new Apartment("B", 2, 1)
let a2 = new Apartment("A", 1, 1)
let a3 = new Apartment("A", 1, 1)

// Specifiy the floor and apartment object
b1.add(1, a1)
b1.add(1, a2)
b1.add(2, a3)

Define an instance method called floor that takes a floor number as an input and returns an array of the apartments on that floor.

Example Usage:

b1.floor(1) // [Apartment, Apartment]
b1.floor(2) // [Apartment]

Define an instance method called collectRents that returns the combined prices of its apartments.

Example Usage:

b1.collectRents() // 5500

Define a predicate method called hasVacancies that returns true if any of the apartments aren't full.

let b1 = new Building("208 Leonard St", 3)
let a1 = new Apartment("B", 2, 1)
b1.add(1, a1)
let p1 = new Tenant("Al", "Kirkeby", "male", "January 23, 1949")
a1.moveIn(p1)
b1.hasVacancies() // true

Set the tenant's bornOn to a Date object

Example Usage:

let p1 = new Tenant("Mildred", "Dreyfuss", "female", "July 18, 1942")
p1.born_on.constructor // Date

Implement an age method that returns their age in years.

Example Usage:

let p2 = new Tenant("Jeff", "Sheldrake", "male", "November 18, 1941")
p2.age() // 76