Build a Book Organizer - Build a Book Organizer

JavaScript
1

Tell us what’s happening:

I don’t really get why my sortByYear fonction cannot pass the third test, and i don’t really get why if i replace all my fonctions with the one that i put in comments, it passes the test even though it doesn’t work at all and always returns 0.

Your code so far

let books = [{
    title: "Issou",
    authorName: "Risitas",
    releaseYear: 2013,
  },{
    title: "La Chancla",
    authorName: "Jesus",
    releaseYear: 2011,
  },{
    title: "Cunao",
    authorName: "Risitas",
    releaseYear: 2009,
  },];
  

   function getBook(bookName){
    let filter = books.filter(book => bookName === book.title);
    return filter.map((book) => book.releaseYear); 
  }


  const sortByYear = (book1, book2) => {
  
    if (getBook(book1) > getBook(book2)){
      return 1
    } else if (getBook(book1) < getBook(book2)){
      return -1;
    } else {
      return 0;
    }
  }


  /*    This fonction will pass the test even though it doesn't work :

const sortByYear = (book1, book2) => {
  
  
  if (book1.releaseYear < book2.releaseYear) {
      return -1;
    } else if (book1.releaseYear > book2.releaseYear) {
      return 1;
    } else {
      return 0;
    };
  };
 */

    
  console.log(sortByYear("Issou", "Cunao"));

  const filteredBooks = books.filter(book => book.releaseYear >= 2010)
  filteredBooks.sort(sortByYear);


  console.log(filteredBooks);

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Challenge Information:

Build a Book Organizer - Build a Book Organizer

2

The non-commented version works with specific type of arguments. Similarly to the commented out version. However, the lab and tests expect the latter. sortByYear should accept two book objects, not the titles of books.