Selina week3

week-3/Homework/mandatory/1-practice/2-code-reading.md

@@ -15,6 +15,8 @@ Take a look at the following code:
 
 Explain why line 4 and line 6 output different numbers.
 
+line 6 will print out 1 as x in line 6 is global scoped which means it takes data from line 1. Line 3 is in {} which means the the x on line 3 is changing what x was originally but this only works inside {} which is why ;ine 4 will print 2 instead.
+
 ## Question 2
 
 Take a look at the following code:
@@ -34,6 +36,8 @@ console.log(y)
 
 What will be the output of this code. Explain your answer in 50 words or less.
 
+The first console log will print out 10 as the x is global scoped and can be accessed anywhere. However for y it will come out as an error or it not being defined as it is not global and the y is only accessible inside the function.
+
 ## Question 3
 
 Take a look at the following code:
@@ -61,3 +65,6 @@ console.log(y);
 ```
 
 What will be the output of this code. Explain your answer in 50 words or less.
+
+The console.log(x) will be 9 as x is defined using a const variable which means it cannot be changed
+The console.log(y) will be {x:10} and the f2 function can change the object and keys in the object can be overwritten.

week-3/Homework/mandatory/2-exercises/exercise-1/exercise-1.js

@@ -1,11 +1,13 @@
 const personOne = {
-    name: 'Popeye',
-    age: 34,
-    favouriteFood: 'Spinach'
-}
+  name: "Popeye",
+  age: 34,
+  favouriteFood: "Spinach",
+};
 
-function introduceYourself(___________________________) {
-    console.log (`Hello, my name is ${name}. I am ${age} years old and my favourite food is ${favouriteFood}.`); 
+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);
+introduceYourself(personOne);

week-3/Homework/mandatory/2-exercises/exercise-1/exercise-1.md

@@ -17,5 +17,5 @@ The program above will print `Batman is Bruce Wayne`. Notice how we use the `{}`
 
 # Exercise
 
-- What is the syntax to destructure the object `personOne` in exercise-1.js?
+- What is the syntax to destructure the object `personOne` in exercise-1.js? it is {}
 - Update the argument of the function `introduceYourself` to use destructuring on the object that gets passed in.

week-3/Homework/mandatory/2-exercises/exercise-2/exercise-2.js

@@ -1,11 +1,77 @@
 let hogwarts = [
-    { firstName: "Harry", lastName: "Potter", house: "Gryffindor", pet: "Owl", occupation: "Student" },
-    { firstName: "Hermione", lastName: "Granger", house: "Gryffindor", pet: "Cat", occupation: "Student" },
-    { firstName: "Draco", lastName: "Malfoy", house: "Slytherin", pet: null, occupation: "Student" },
-    { firstName: "Cedric", lastName: "Diggory", house: "HufflePuff", pet: null, occupation: "Student" },
-    { firstName: "Severus", lastName: "Snape", house: "Slytherin", pet: null, occupation: "Teacher" },
-    { firstName: "Filius", lastName: "Flitwick", house: "Ravenclaw", pet: null, occupation: "Teacher" },
-    { firstName: "Pomona", lastName: "Sprout", house: "Hufflepuff", pet: null, occupation: "Teacher" },
-    { firstName: "Minerva", lastName: "McGonagall", house: "Gryffindor", pet: null, occupation: "Teacher" },
-    { firstName: "Albus", lastName: "Dumbledore", house: "Gryffindor", pet: "Phoenix", occupation: "Teacher" }
-]
+  {
+    firstName: "Harry",
+    lastName: "Potter",
+    house: "Gryffindor",
+    pet: "Owl",
+    occupation: "Student",
+  },
+  {
+    firstName: "Hermione",
+    lastName: "Granger",
+    house: "Gryffindor",
+    pet: "Cat",
+    occupation: "Student",
+  },
+  {
+    firstName: "Draco",
+    lastName: "Malfoy",
+    house: "Slytherin",
+    pet: null,
+    occupation: "Student",
+  },
+  {
+    firstName: "Cedric",
+    lastName: "Diggory",
+    house: "HufflePuff",
+    pet: null,
+    occupation: "Student",
+  },
+  {
+    firstName: "Severus",
+    lastName: "Snape",
+    house: "Slytherin",
+    pet: null,
+    occupation: "Teacher",
+  },
+  {
+    firstName: "Filius",
+    lastName: "Flitwick",
+    house: "Ravenclaw",
+    pet: null,
+    occupation: "Teacher",
+  },
+  {
+    firstName: "Pomona",
+    lastName: "Sprout",
+    house: "Hufflepuff",
+    pet: null,
+    occupation: "Teacher",
+  },
+  {
+    firstName: "Minerva",
+    lastName: "McGonagall",
+    house: "Gryffindor",
+    pet: null,
+    occupation: "Teacher",
+  },
+  {
+    firstName: "Albus",
+    lastName: "Dumbledore",
+    house: "Gryffindor",
+    pet: "Phoenix",
+    occupation: "Teacher",
+  },
+];
+
+hogwarts.forEach(({ firstName, lastName, house }) => {
+  if (house === "Gryffindor") {
+    console.log(firstName, lastName);
+  }
+});
+
+hogwarts.forEach(({ firstName, lastName, pet, occupation }) => {
+  if (occupation === "Teacher" && pet) {
+    console.log(firstName, lastName);
+  }
+});

week-3/Homework/mandatory/2-exercises/exercise-3/exercise-3.js

@@ -1,9 +1,21 @@
- let order = [
-     { itemName: "Hot cakes", quantity: 1, unitPrice: 2.29},
-     { itemName: "Apple Pie", quantity: 2, unitPrice: 1.39},
-     { itemName: "Egg McMuffin", quantity: 1, unitPrice: 2.80},
-     { itemName: "Sausage McMuffin", quantity: 1, unitPrice: 3.00},
-     { itemName: "Hot Coffee", quantity: 2, unitPrice: 1.00},
-     { itemName: "Hash Brown", quantity: 4, unitPrice: 0.40}
- ]
-
+let order = [
+  { itemName: "Hot cakes", quantity: 1, unitPrice: 2.29 },
+  { itemName: "Apple Pie", quantity: 2, unitPrice: 1.39 },
+  { itemName: "Egg McMuffin", quantity: 1, unitPrice: 2.8 },
+  { itemName: "Sausage McMuffin", quantity: 1, unitPrice: 3.0 },
+  { itemName: "Hot Coffee", quantity: 2, unitPrice: 1.0 },
+  { itemName: "Hash Brown", quantity: 4, unitPrice: 0.4 },
+];
+
+let total = 0;
+
+console.log(`QTY   ITEM             TOTAL`);
+
+order.forEach(({ itemName, quantity, unitPrice }) => {
+  console.log(
+    `${quantity}   ${itemName}          ${(unitPrice * quantity).toFixed(2)}`
+  );
+  total += quantity * unitPrice;
+});
+
+console.log(`Total: ${total}`);