book-organizer.js

const books = [
  {
    title: "Your Next Five Moves: Master the Art of Business Strategy",
    authorName: "Patrick Bet-David and Greg Dinkin",
    releaseYear: 1990
  },
  {
    title: "Atomic Habits",
    authorName: "James Clear",
    releaseYear: 2018
  },
  {
    title: "Rich Dad Poor Dad",
    authorName: "Robert Kiyosaki and Sharon Lechter",
    releaseYear: 1997
  },
  {
    title: "The Great Gatsby",
    authorName: "F. Scott Fitzgerald",
    releaseYear: 1925 
  }
];


function sortByYear(book1, book2) {
  if (book1.releaseYear < book2.releaseYear) {
    return -1;
  } else if (book1.releaseYear > book2.releaseYear) {
    return 1;
  } else {
    return 0;
  }
}

const filteredBooks = books.filter(book => book.releaseYear <= 1950);


filteredBooks.sort(sortByYear);

console.log(filteredBooks);