London | 25-ITP-May | Houssam Lahlah | Sprint 1 | Feature/destructuring

Sprint-1/destructuring/exercise-1/exercise.js

@@ -6,7 +6,9 @@ const personOne = {
 
 // Update the parameter to this function to make it work.
 // Don't change anything else.
-function introduceYourself(___________________________) {
+// Use object destructuring in introduceYourself parameter
+function introduceYourself({ name, age, favouriteFood }) {
+
   console.log(
     `Hello, my name is ${name}. I am ${age} years old and my favourite food is ${favouriteFood}.`
   );

Sprint-1/destructuring/exercise-1/readme.md

@@ -29,5 +29,27 @@ console.log(`Batman is ${firstName}, ${lastName}`);
 
 # Exercise
 
-- What is the syntax to destructure the object `personOne` in exercise.js?
-- Update the parameter of the function `introduceYourself` to use destructuring on the object that gets passed in.
+1 - What is the syntax to destructure the object `personOne` in exercise.js?
+
+For the personOne example, the destructuring syntax would be:
+
+```
+let { name, age, favouriteFood } = personOne;
+
+That pulls the three properties out of personOne into separate variables.
+
+```
+2 - Update the parameter of the function `introduceYourself` to use destructuring on the object that gets passed in.
+
+```
+To update the parameter of introduceYourself function to use destructuring, I would write:
+
+function introduceYourself({ name, age, favouriteFood }) {
+  console.log(
+    `Hello, my name is ${name}. I am ${age} years old and my favourite food is ${favouriteFood}.`
+  );
+}
+This way, the function immediately unpacks those properties from the object is passed in, without 
+needing separate variable assignments.
+
+```

Sprint-1/destructuring/exercise-2/exercise.js

@@ -70,3 +70,19 @@ let hogwarts = [
     occupation: "Teacher",
   },
 ];
+
+
+// write a program that will take the `hogwarts` array as 
+// input and display the names of the people who belong to the Gryffindor house.
+// Use object destructuring to extract the values you need out of each element in the array.
+
+function displayGryffindors({ firstName, lastName, house, pet, occupation }) {
+   if (house !== "Gryffindor") return;
+  console.log(`Hello, my name is ${firstName} ${lastName}. I am a ${occupation} at Hogwarts and I belong to the ${house} house. My pet is a ${pet ? pet : 'none'}.`);
+}
+hogwarts.forEach(displayGryffindors);
+
+// Write a function named displayGryffindors that takes an object 
+// with properties `firstName`, `lastName`, `house`, `pet`, and `occupation`
+// and display the names of the people who belong to the Gryffindor house.
+

Sprint-1/destructuring/exercise-2/readme.md

@@ -33,5 +33,18 @@ Albus Dumbledore
 ### Expected result
 
 ```
+
+Hello, my name is Harry Potter. I am a Student at Hogwarts and I belong to the Gryffindor house.
+I have a pet Owl.
+Hello, my name is Ron Weasley. I am a Student at Hogwarts and I belong to the Gryffindor house.
+I have a pet Scabbers.
+Hello, my name is Hermione Granger. I am a Student at Hogwarts and I belong to the Gryffindor house.
+I have a pet Cat.
+Hello, my name is Minerva McGonagall. I am a Teacher at Hogwarts and I belong to the Gryffindor house.
+I don't have a pet.
+Hello, my name is Albus Dumbledore. I am a Teacher at Hogwarts and I belong to the Gryffindor house.
+I have a pet Phoenix.
+
+
 Albus Dumbledore
 ```

Sprint-1/destructuring/exercise-3/exercise.js

@@ -6,3 +6,54 @@ let order = [
   { itemName: "Hot Coffee", quantity: 2, unitPricePence: 100 },
   { itemName: "Hash Brown", quantity: 4, unitPricePence: 40 },
 ];
+
+// Print the header for the receipt
+
+console.log("QTY      ITEM                 TOTAL");
+
+// Function to print the order details
+// Use destructuring to access itemName, quantity, and unitPricePence
+
+function printOrder(itemName, quantity, unitPricePence) {
+
+  // Iterate over each item in the order
+  // Use forEach to loop through the order array
+  // Use destructuring to access itemName, quantity, and unitPricePence
+  // Calculate total price for each item
+
+  order.forEach(({ itemName, quantity, unitPricePence }) => {
+    const totalPrice = (quantity * unitPricePence) / 100;
+    console.log(
+      `${quantity.toString().padStart(2)}       ${itemName.padEnd(20)} £${totalPrice.toFixed(2)}`
+    );
+  });
+
+  // Calculate total cost of the order
+  // Use destructuring to access quantity and unitPricePence
+  // Use reduce to sum up the total cost
+  // Format the total cost to two decimal places and prefix with a currency symbol
+  // Log the total cost to the console
+  // Use toFixed(2) to ensure two decimal places
+  // Use console.log to print the total cost
+
+  const totalCost = order.reduce((acc, { quantity, unitPricePence }) => {
+  return acc + (quantity * unitPricePence);
+}, 0) / 100;
+console.log(`\nTotal: £${totalCost.toFixed(2)}`);
+}
+// Call the function to print the order
+printOrder(order);
+
+
+
+
+// Expected result
+
+// QTY      ITEM                 TOTAL
+//  1       Hot cakes           £2.32
+//  2       Apple Pie           £2.78
+//  1       Egg McMuffin        £2.80       
+//  1       Sausage McMuffin    £3.00
+//  2       Hot Coffee          £2.00
+//  4       Hash Brown          £1.60
+// Total: £14.50