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211 changes: 133 additions & 78 deletions src/books.js
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// Iteration 1 | Books Array

// Book 1
// 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...
// }

// Book 2
// title: The Airbnb Story
// pages: 256
// author: Leight Gallagher
// details: {
// language: English
// description: This is the remarkable behind-the-scenes story of the creation and growth of Airbnb...
// }

// Book 3
// title: Educated - A Memoir
// pages: 352
// author: Tara Westover
// details: {
// language: English
// description: Educated is an account of the struggle for self-invention...
// }

// Book 4
// 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.
// }


// Your code here:
const booksArray = [];



// Create an array containing 4 objects representing books with the specified properties
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: 256,
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: 352,
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() {
// Your code here:

/**
* Returns a formatted string with book details
* @param {Object} book - The book object
* @returns {String} - Formatted string with title, author and pages
*/
function getBookDetails(book) {
return `${book.title} - ${book.author} - ${book.pages} pages`;
}


// Example usage:
// console.log(getBookDetails(booksArray[0]));
// Expected output: "The Old Man and the Sea - Ernest Hemingway - 128 pages"

// Iteration 3 | Delete Language
// Your code here:


// Iterate over the booksArray and delete the language property from each book
for (let i = 0; i < booksArray.length; i++) {
delete booksArray[i].details.language;
}

// Verify the language property has been deleted
console.log(booksArray);

// Iteration 4 | Estimated Reading Time
// Your code here:


// Add a readingTime property to each book based on the formula
for (let i = 0; i < booksArray.length; i++) {
// Calculate reading time: (pages * 500) / 90, rounded up
const readingTimeMinutes = Math.ceil((booksArray[i].pages * 500) / 90);
booksArray[i].readingTime = readingTimeMinutes;
}

// Verify the readingTime property has been added
console.log(booksArray);

// 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 = {
"J. K. Rowling": [
["Harry Potter and the Philosopher's Stone", 223],
["Harry Potter and the Chamber of Secrets", 251],
["Harry Potter and the Prisoner of Azkaban", 317],
["Harry Potter and the Goblet of Fire", 636],
],
"Neal Stephenson": [
["Cryptonomicon", 928],
["Anathem", 1008],
["Fall; or, Dodge in Hell", 896],
],
"Malcolm Gladwell": [
["Outliers", 320],
["Blink", 287],
],
const dictionaryExample = {
"J. K. Rowling": [
["Harry Potter and the Philosopher's Stone", 223],
["Harry Potter and the Chamber of Secrets", 251],
["Harry Potter and the Prisoner of Azkaban", 317],
["Harry Potter and the Goblet of Fire", 636],
],
"Neal Stephenson": [
["Cryptonomicon", 928],
["Anathem", 1008],
["Fall; or, Dodge in Hell", 896],
],
"Malcolm Gladwell": [
["Outliers", 320],
["Blink", 287],
],
};

function booksByAuthor() {
// Your code here:
/**
* Transforms a dictionary of books into an array of book objects
* @param {Object} dictionary - Object with authors as keys and arrays of book info as values
* @returns {Array} - Array of book objects with title, pages, and author properties
*/
function booksByAuthor(dictionary) {
const booksArray = [];

// Method 1: Using Object.keys()
// const authors = Object.keys(dictionary);
// for (let i = 0; i < authors.length; i++) {
// const author = authors[i];
// const books = dictionary[author];
//
// for (let j = 0; j < books.length; j++) {
// booksArray.push({
// title: books[j][0],
// pages: books[j][1],
// author: author
// });
// }
// }

// Method 2: Using for...in loop
for (const author in dictionary) {
const books = dictionary[author];

for (let i = 0; i < books.length; i++) {
booksArray.push({
title: books[i][0],
pages: books[i][1],
author: author
});
}
}

return booksArray;
}


// Example usage:
// console.log(booksByAuthor(dictionaryExample));

// Bonus: Iteration 6 | Average Page Count
function averagePageCount() {
// Your code here:
/**
* Calculates the average page count of all books in the array
* @param {Array} books - Array of book objects
* @returns {Number} - Average page count
*/
function averagePageCount(books) {
let totalPages = 0;

for (let i = 0; i < books.length; i++) {
totalPages += books[i].pages;
}

return totalPages / books.length;
}

// Example usage:
// console.log(averagePageCount(booksArray));
// console.log(averagePageCount(booksByAuthor(dictionaryExample)));