How can I make this Javascript code more Dry?

Question

This is for one of the assignments on Odin Project. As i'm testing things out, i'm realizing how this code is bad because it's not DRY. I would just be creating more and more book objects. How can I make this more clean?

let myLibrary = [];

    function Book(title, author, pages, hasRead){
      this.title = title;
      this.author = author; 
      this.page = pages;
      this.hasRead = hasRead;
    };
    
    function addBookToLibrary(newBook){
      return myLibrary.push(newBook)
    };
    
    let newBook = new Book("Wool", "Hugh Howey", "592", false);
    let lifeOfPi = new Book("Life of Pi", "Yann Martel", "392", false);
    
    addBookToLibrary(newBook);
    addBookToLibrary(lifeOfPi);
    console.log(myLibrary);

Answer 1

You could do something like this, so that you have a "BookLibrary" class.

// Make the class "BookLibrary"

var BookLibrary = function() { 

    
    this.myLibrary = [];


    this.addBookToLibrary = function(title, author, page, hasRead) {

        var newBook = {}; // a book new object to be stored to array

        newBook.title = title;
        newBook.author = author;
        newBook.page = page;
        newBook.hasRead = hasRead;

        this.myLibrary.push( newBook ); // add to collection of books

    }
    
}

// test demo

// instantiate the object 
var books = new BookLibrary();

// add some books
books.addBookToLibrary("Wool", "Hugh Howey", "592", false);
books.addBookToLibrary("Life of Pi", "Yann Martel", "392", false);

// see if it worked
console.log( books.myLibrary );