end of lesson 1

01_Functions_&_Scope/src/index.js

@@ -73,29 +73,71 @@ const inventory = [
 */
 
 // Start here!
+function helloWorld() {
+  let secret = "I love dates... The fruit ;)"
+  return "Hello, world!";
+}
 
+helloWorld()
 
+function formatPrice(priceNum) {
+  return '$' + Number.parseFloat(priceNum).toFixed(2);
+  // return `$${Number.parseFloat(priceNum).toFixed(2)}`
+}
 
+console.log('formatPrice', formatPrice(inventory[0].price))
 
 // 💡 Arrow functions vs regular functions
 
 // ✅ create an arrow function version of the formatPrice function
 
+// const formatPrice = (priceNum) => {
+//   return '$' + Number.parseFloat(priceNum).toFixed(2);
+//   // return `$${Number.parseFloat(priceNum).toFixed(2)}`
+// }
 
 
 // ✅ create a blurb() function that accepts a book as an argument and logs a message in the following format:
 // 'Eloquent JavaScript: A Modern Introduction to Programming by Marjin Haverbeke is on sale for $10.00'
 
+// books look like this:
+// {
+//   id: 1,
+//   title: 'Eloquent JavaScript: A Modern Introduction to Programming',
+//   author: 'Marjin Haverbeke',
+//   price: 10.00,
+//   reviews: [{userID: 1, content:'Good book, but not great for new coders'}],
+//   inventory: 10,
+//   imageUrl: 'https://images-na.ssl-images-amazon.com/images/I/51IKycqTPUL._SX218_BO1,204,203,200_QL40_FMwebp_.jpg'
+// },
+function blurb(book) {
+  const title = book.title;
+  const author = book.author;
+  const price = formatPrice(book.price);
+  return `${title} by ${author} is on sale for ${price}`
+}
+
+console.log('blurb', blurb(inventory[0]))
 
 
 // 💡 Difference between Block scope, Function scope, and Global scope
 
 // ✅ create a variable `highestPricedBook`
 
-
+let highestPriceBook;
 
 // ✅ create a function `findHighestPricedBook` that finds that book and returns it
+function findHighestPricedBook() {
+  highestPriceBook = inventory[0]; // set to first book
+  for (let i = 1; i < inventory.length; i++) {
+    if (highestPriceBook.price < inventory[i].price) {
+      highestPriceBook = inventory[i];
+    } 
+  }
+  return highestPriceBook;
+}
 
+highestPriceBook = findHighestPricedBook()
 
 
 // After Break
@@ -106,18 +148,32 @@ const inventory = [
 
 // 💡 Practice using callbacks for iteration
 
-
+// const nums = [1, 2, 3]
+// nums.forEach(num => console.log(num*num))
 
 // ✅ Create an array of the prices of all of the books
 
+let prices = [];
+inventory.forEach(book => prices.push(formatPrice(book.price)))
 
+console.log('prices', prices);
 
 // ✅ Create an array of simplified book objects
 
+const simplified = inventory.map(book => {
+  return {
+    title: book.title,
+    author: book.author,
+    price: book.price
+  }
+})
 
 
 // ✅ Create an array of strings from the inventory in the following format:
 // 'Eloquent JavaScript: A Modern Introduction to Programming by Marjin Haverbeke is on sale for $10.00'
 
+// const blurbs = inventory.map(book => blurb(book))
+const blurbs = inventory.map(blurb)
 
+console.log('blurbs', blurbs);
 // 💡 When do I use forEach vs map?