Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | 14x 12x 30x 8x 8x 9x 9x 1x 8x 1x 7x 7x 3x 3x 3x 2x | class Inventory {
constructor() {
this.books = [];
}
addBook(book) { // Receive a book object and add it to the inventory
this.books.push(book);
}
findBookByISBN(ISBN) {
return this.books.find(book => book.ISBN === ISBN);
}
isAvailable(ISBN) {
const book = this.findBookByISBN(ISBN);
return book && book.copies > 0;
}
reduceCopy(ISBN) {
const book = this.findBookByISBN(ISBN);
if (!book) {
throw new Error(`Book with ISBN ${ISBN} not found.`);
}
if (book.copies === 0) {
throw new Error(`No copies available for book with ISBN ${ISBN}.`);
}
Eif (book && book.copies > 0) {
book.copies -= 1;
}
}
increaseCopy(ISBN) {
const book = this.findBookByISBN(ISBN);
Eif (book) {
book.copies += 1;
}
}
}
module.exports = Inventory; |