Brussels | itp-2025-01| Basel Adoum | week 10 | debugging

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

@@ -3,13 +3,11 @@ const personOne = {
   age: 34,
   favouriteFood: "Spinach",
 };
-
-// Update the parameter to this function to make it work.
-// Don't change anything else.
-function introduceYourself(___________________________) {
+function introduceYourself({ name, age, favouriteFood }) {
   console.log(
     `Hello, my name is ${name}. I am ${age} years old and my favourite food is ${favouriteFood}.`
   );
 }
-
-introduceYourself(personOne);
+// I add this line to check if the function is being called
+console.log("Script is running and function is being called!");
+introduceYourself(personOne);

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

@@ -70,3 +70,31 @@ let hogwarts = [
     occupation: "Teacher",
   },
 ];
+
+// Loop through each character in the hogwarts array. I can use forEach()
+//  to loop through each item:
+
+
+hogwarts.forEach(function(character) {
+  // Destructure - extract firstName, lastName, and house from current character object
+  const { firstName, lastName, house } = character;
+
+  // Check if this character belongs to Gryffindor house
+  if (house === "Gryffindor") {
+    // If yes, print their full name
+    console.log(firstName + " " + lastName);
+  }
+});
+
+
+// Loop through each character in the hogwarts array
+hogwarts.forEach(function(character) {
+  // Destructure - extract firstName, lastName, occupation, and pet from current character
+  const { firstName, lastName, occupation, pet } = character;
+
+  // Check if this person is a teacher AND has a pet (pet is not null)
+  if (occupation === "Teacher" && pet !== null) {
+    // If both conditions are true, print their name. 
+    console.log(firstName + " " + lastName);
+  }
+});

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

@@ -6,3 +6,29 @@ let order = [
   { itemName: "Hot Coffee", quantity: 2, unitPricePence: 100 },
   { itemName: "Hash Brown", quantity: 4, unitPricePence: 40 },
 ];
+
+
+// Print receipt header
+console.log("QTY     ITEM                TOTAL");
+
+let totalCost = 0;
+
+// Loop through each item in the order
+order.forEach(function(item) {
+  // Destructure - extract the properties we need from each item
+  const { itemName, quantity, unitPricePence } = item;
+
+  // Calculate total for this item (convert pence to pounds)
+  const itemTotal = (quantity * unitPricePence) / 100;
+
+  // Add to overall total
+  totalCost += itemTotal;
+
+  // Format and print the line with proper spacing
+  //.padEnd give a block of spaces so this way it keeps the values
+  // of total consistently far from it. from beginng to end it is 18
+  console.log(`${quantity}       ${itemName.padEnd(18)}  ${itemTotal.toFixed(2)}`);
+});
+
+// Print the final total
+console.log(`\nTotal: ${totalCost.toFixed(2)}`);

debugging/book-library/script.js

@@ -7,7 +7,7 @@ window.addEventListener("load", function (e) {
 
 function populateStorage() {
   if (myLibrary.length == 0) {
-    let book1 = new Book("Robison Crusoe", "Daniel Defoe", "252", true);
+    let book1 = new Book("Robinson Crusoe", "Daniel Defoe", "252", true);
     let book2 = new Book(
       "The Old Man and the Sea",
       "Ernest Hemingway",
@@ -37,8 +37,8 @@ function submit() {
     alert("Please fill all fields!");
     return false;
   } else {
-    let book = new Book(title.value, title.value, pages.value, check.checked);
-    library.push(book);
+    let book = new Book(title.value, author.value, pages.value, check.checked); // Fixed: was title.value twice
+    myLibrary.push(book); // Fixed: was library instead of myLibrary
     render();
   }
 }
@@ -54,12 +54,12 @@ function render() {
   let table = document.getElementById("display");
   let rowsNumber = table.rows.length;
   //delete old table
-  for (let n = rowsNumber - 1; n > 0; n-- {
+  for (let n = rowsNumber - 1; n > 0; n--) {
     table.deleteRow(n);
   }
   //insert updated row and cells
   let length = myLibrary.length;
-  for (let i = 0; i < length; i++) {
+  for (let i = 0; i < length; i++) { // Added missing {
     let row = table.insertRow(1);
     let titleCell = row.insertCell(0);
     let authorCell = row.insertCell(1);
@@ -83,21 +83,22 @@ function render() {
     }
     changeBut.innerText = readStatus;
 
+
     changeBut.addEventListener("click", function () {
       myLibrary[i].check = !myLibrary[i].check;
       render();
     });
 
     //add delete button to every row and render again
     let delButton = document.createElement("button");
-    delBut.id = i + 5;
-    deleteCell.appendChild(delBut);
-    delBut.className = "btn btn-warning";
-    delBut.innerHTML = "Delete";
-    delBut.addEventListener("clicks", function () {
+    delButton.id = i + 5;
+    deleteCell.appendChild(delButton);
+    delButton.className = "btn btn-warning";
+    delButton.innerHTML = "Delete";
+    delButton.addEventListener("click", function () {
       alert(`You've deleted title: ${myLibrary[i].title}`);
       myLibrary.splice(i, 1);
       render();
     });
-  }
-}
+  } // Added missing }
+}

debugging/code-reading/readme.md

@@ -16,6 +16,7 @@ Take a look at the following code:
 ```
 
 Explain why line 5 and line 8 output different numbers.
+Because inside the code, x is declared globally. so it is using the global variable. while in line 8 it logs the variable from the function. 
 
 ## Question 2
 
@@ -34,6 +35,10 @@ console.log(y);
 ```
 
 What will be the output of this code. Explain your answer in 50 words or less.
+10
+20 
+because inside the function y is declared but not called.
+i checked the internet. it says results will be undefined because y is defined inside teh function scoop.  
 
 ## Question 3
 
@@ -62,3 +67,6 @@ console.log(y);
 ```
 
 What will be the output of this code. Explain your answer in 50 words or less.
+9
+{x: 10}
+x is a primitive (number) passed by value - modifying it inside f1() doesn't affect the original. y is an object passed by reference - modifying its property inside f2() changes the original object.

debugging/exampleEJS/package.json

@@ -5,8 +5,7 @@
   "main": "script.mjs",
   "type": "module",
   "scripts": {
-    "test": "node --experimental-vm-modules node_modules/jest/bin/jest.js"
-  },
+    "test": "jest"},
   "dependencies": {
     "jest": "^29.7.0"
   },

debugging/exampleEJS/script.js

@@ -3,5 +3,5 @@ function exampleFunction() {
 return true
 }
 
-export default exampleFunction;
+module.export = exampleFunction;
 

debugging/exampleEJS/script.test.js

@@ -1,5 +1,5 @@
 //check import works
-import exampleFunction from './script';
+const exampleFunction = require('./script.js');
 // check these functions exist
 describe('Basic test', () => {
   test('exampleFunction exists', () => {