so I am currently working on a project on Code Academy, I am not certain why is it showing undefined. Although I've watched the walk through video, the project is named Build a Library. Here's my entire code:
I am still confused regarding JavaScrip, so please bear with me. Thank you for those who will answer!
class Media {
constructor(title) {
this._title = title;
this._ratings = [];
this._isCheckedOut = false;
}
get title() {
return this._title;
}
get isCheckedOut() {
return this._isCheckedOut;
}
get ratings() {
return this._ratings;
}
set isCheckedOut(value) {
this._isCheckedOut = value;
}
toggleCheckOutStatus() {
this._isCheckedOut = !this._isCheckedOut;
}
getAverageRating() {
let ratingsSum = this.ratings.reduce((accumulator, rating) => accumulator + rating);
}
addRating(value) {
this.ratings.push(value);
}
}
class Book extends Media {
constructor(author, title, pages) {
super(title);
this._author = author;
this._pages = pages;
}
get author() {
return this._author;
}
get pages() {
return this._pages;
}
}
class Movie extends Media {
constructor(director, title, runTime) {
super(title);
this._director = director;
this._runTime = runTime;
}
get director() {
return this._director;
}
get runTime() {
return this._runTime;
}
}
const historyOfEverything = new Book("Bill Bryson", "A Short History of Nearly Everything", 544);
historyOfEverything.toggleCheckOutStatus();
console.log(historyOfEverything.isCheckedOut);
historyOfEverything.addRating(4);
historyOfEverything.addRating(5);
historyOfEverything.addRating(5);
console.log(historyOfEverything.getAverageRating());
const speed = new Movie("Jan de Bont", "Speed", 116);
speed.toggleCheckOutStatus();
console.log(speed.isCheckedOut);
speed.addRating(1);
speed.addRating(1);
speed.addRating(5);
console.log(speed.getAverageRating());
because you are not returning anything from the getAverageRating function,
you should add : return ratingsSum/this.ratings.length if i understood what you want to do , so the whole function will be something like this:
getAverageRating() {
let ratingsSum = this.ratings.reduce(
(accumulator, rating) => accumulator + rating
);
return ratingsSum/this.ratings.length
}