Js core3/week3/leroy douglas

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

@@ -15,6 +15,10 @@ Take a look at the following code:
 
 Explain why line 4 and line 6 output different numbers.
 
+## Answer 1
+
+The console log on line 4 refers to the block scoped function declared on line 3, whereas the console log on line 6, refers to the globally scoped variable declared on line 1;
+
 ## Question 2
 
 Take a look at the following code:
@@ -33,6 +37,9 @@ console.log(y)
 ```
 
 What will be the output of this code. Explain your answer in 50 words or less.
+## Answer 2
+
+The first console log to be displayed will be from line 31, output is from the globally scoped x variable: 10. The 2nd console log attempts to display the return value of f1(): undefined. The 3rd console log causes an error as the y variable is out of scope.
 
 ## Question 3
 
@@ -60,4 +67,8 @@ f2(y);
 console.log(y);
 ```
 
-What will be the output of this code. Explain your answer in 50 words or less.
+What will be the output of this code. Explain your answer in 50 words or less
+
+## Answer3
+
+The 1st  log displays the global variable x: outputs 9. f1() takes a copy of the globally scoped x, therefore x is not affected by f1(). The 2nd logs the structure of object y,  showing that the object's property changes from 9 to 10 due to f2() receiving a reference to y.

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

@@ -4,7 +4,7 @@ const personOne = {
     favouriteFood: 'Spinach'
 }
 
-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}.`); 
 }
 

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

@@ -9,3 +9,20 @@ let hogwarts = [
     { firstName: "Minerva", lastName: "McGonagall", house: "Gryffindor", pet: null, occupation: "Teacher" },
     { firstName: "Albus", lastName: "Dumbledore", house: "Gryffindor", pet: "Phoenix", occupation: "Teacher" }
 ]
+
+
+const displayName = (people) => {
+    console.log("List of people in  Gryffindor house: ");
+  people.forEach( ({ firstName, lastName, house }) =>house == "Gryffindor" && console.log(`${firstName} ${lastName}`) );
+};
+
+const isPetOwner = (people) => {
+    console.log("List of Teachers with pets: ");
+    people.forEach( ( { firstName, lastName, occupation, pet} ) => {
+        if(occupation === "Teacher" && pet !== null){
+            console.log(`${firstName} ${lastName}`);        
+        }
+    });
+}
+displayName(hogwarts);
+isPetOwner(hogwarts);

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

@@ -6,4 +6,20 @@
      { itemName: "Hot Coffee", quantity: 2, unitPrice: 1.00},
      { itemName: "Hash Brown", quantity: 4, unitPrice: 0.40}
  ]
-
+
+ const receipt = order => {
+     let totalCost = 0;
+     console.log("QTY  ITEM             TOTAL");
+    order.forEach( ( {itemName, quantity, unitPrice} ) => {
+         let total = (quantity * unitPrice ).toFixed(2) ;
+         totalCost += quantity * unitPrice;
+        let padding = "".padStart(17 - itemName.length," ");
+        //console.log( str)
+        //let total = (quantity * unitPrice).toFixed(2).padStart(strlen(itemName), " ");
+
+        console.log(`${quantity}    ${itemName}${padding}${total}`);
+    })
+    console.log(`Total: ${totalCost.toFixed(2)}`);
+ };
+
+ receipt(order);