Solved Lab

src/books.js

@@ -38,37 +38,89 @@
 
 
 // Your code here:
-const booksArray = [];
+const booksArray = [
+  {
+    title: "The Old Man and the Sea",
+    pages: 128,
+    author: "Ernest Hemingway",
+    details: {
+      language: "English",
+      description: "One of Hemingway's most famous works, it tells the story of Santiago..."
+    }
+  },
+
+  {
+    title: "The Airbnb Story",
+    pages: 352,
+    author: "Leight Gallagher",
+    details: {
+      language: "English",
+      description: "This is the remarkable behind-the-scenes story of the creation and growth of Airbnb..."
+    }
+  },
+
+  {
+    title: "Educated - A Memoir",
+    pages: 128,
+    author: "Tara Westover",
+    details: {
+      language: "English",
+      description: "Educated is an account of the struggle for self-invention..."
+    }
+  },
+
+  {
+    title: "The Art of Learning",
+    pages: 288,
+    author: "Josh Waitzkin",
+    details: {
+      language: "English",
+      description: "The Art of Learning takes readers through Waitzkin's unique journey to excellence. He explains in clear detail how a well-thought-out, principled approach to learning is what separates success from failure."
+    }
+  },
+]
 
 
 
 
 // Iteration 2 | Book Details
-function getBookDetails() {
+function getBookDetails(book) {
   // Your code here:
 
+  return `${book.title} - ${book.author} - ${book.pages} pages`
 }
 
-
-
 // Iteration 3 | Delete Language
 // Your code here:
 
+booksArray.forEach(function(deletedBook){
+  return delete deletedBook.details.language
+})
+
 
 
 
 // Iteration 4 | Estimated Reading Time
 // Your code here:
 
 
+booksArray.forEach(function(obj){
+  let time = (obj.pages * 500) / 90
+ obj.readingTime = Math.ceil (time);
+})
+
+
+
+
+
 
 
 // Bonus: Iteration 5 | Books Dictionary
 
 /* The `dictionary` is an object containing books grouped by author. 
  The book info is stored in arrays with structure: [title, pages]. 
 */
-const dictionary = {
+const dictionaryExample = {
     "J. K. Rowling": [
         ["Harry Potter and the Philosopher's Stone", 223],
         ["Harry Potter and the Chamber of Secrets", 251],
@@ -86,15 +138,38 @@ const dictionary = {
     ],
 };
 
-function booksByAuthor() {
+//console.log(dictionaryExample["J. K. Rowling"][3])
+
+
   // Your code here:
-
-}
+function booksByAuthor(dictionary) {
+  const result = [];
+
+  for (const author in dictionary) {
+    const books = dictionary[author];
 
+    books.forEach(bookArr => {
+      const [title, pages] = bookArr;
 
+      result.push({
+        title,
+        pages,
+        author
+      });
+    });
+  }
+
+  return result;
+}
 
 // Bonus: Iteration 6 | Average Page Count
-function averagePageCount() {
-  // Your code here:
-
+function averagePageCount(books) {
+  const totalPages = books.reduce(function(sum, book) {
+    return sum + book.pages;
+  }, 0);
+
+  return totalPages / books.length;
 }
+
+
+