Day 13: Abstract Classes

PHOTO EMBED

Sun May 01 2022 14:26:47 GMT+0000 (Coordinated Universal Time)

Saved by @GreenMark #javascript 

'use strict';

var _input = '';
var _index = 0;
process.stdin.on('data', (data) => { _input += data; });
process.stdin.on('end', () => {
    _input = _input.split(new RegExp('\n'));
    main();    
});
function readLine() { return _input[_index++]; }

/**** Ignore above this line. ****/

class Book {
    constructor(title, author) {
        if (this.constructor === Book) {
            throw new TypeError('Do not attempt to directly instantiate an abstract class.'); 
        }
        else {
            this.title = title;
            this.author = author;
        }
    }
    
    display() {
        console.log('Implement the \'display\' method!')
    }
}

// Declare your class here.
    /**   
    *   Class Constructor
    *   
    *   @param title The book's title.
    *   @param author The book's author.
    *   @param price The book's price.
    **/
    // Write your constructor here
    
    /**   
    *   Method Name: display
    *   
    *   Print the title, author, and price in the specified format.
    **/
    // Write your method here
    
// End class

class MyBook extends Book{

    /**   
    *   Class Constructor
    *   
    *   @param title The book's title.
    *   @param author The book's author.
    *   @param price The book's price.
    **/
    // Write your constructor here
    constructor(title, author, price) {
        super(title, author);
        this.price = price;
    }
    /**   
    *   Method Name: display
    *   
    *   Print the title, author, and price in the specified format.
    **/
    // Write your method here
    display() {
        console.log('Title: ' + this.title);
        console.log('Author: ' + this.author);
        console.log('Price: ' + this.price);
    }
    
// End class
}



function main() {
    let title = readLine()
    let author = readLine()
    let price = +readLine()

    let book = new MyBook(title, author, price)
    book.display()
}
content_copyCOPY

https://www.hackerrank.com/challenges/30-abstract-classes/problem