Book Library (Archive Objects & Classes)

function solve(input) {
  class Book {
    constructor(title, author, publisher, releaseDate, isbn, price) {
      this.title = title;
      this.author = author;
      this.publisher = publisher;
      this.date = releaseDate;
      this.isbn = isbn;
      this.price = price;
    }
  }

  let data = input.slice(0).filter(x => x !== "");
  const count = Number(data.shift());
  let library = {};
  for (const line of data) {
    let book = new Book(...line.split(" "));
    if (!library[book.author]) {
      library[book.author] = 0;
    }
    library[book.author] += Number(book.price);
  }

  Object.entries(library)
    .sort((a, b) => {
      if (a[1] == b[1]) {
        return a[0].localeCompare(b[0]);
      }
      return b[1] - a[1];
    })
    .forEach(pair => {
      console.log(`${pair[0]} -> ${pair[1].toFixed(2)}`);
    });
}