Almost done.

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

@@ -14,6 +14,7 @@ Take a look at the following code:
 ```
 
 Explain why line 4 and line 6 output different numbers.
+On line 6, x is a global variable. On line 4, x is a local variable whose scope is within a block of lines 2 through 5.
 
 ## Question 2
 
@@ -33,6 +34,10 @@ console.log(y)
 ```
 
 What will be the output of this code. Explain your answer in 50 words or less.
+There will be:
+10 - x is a global variable. (line 28)
+undefined - the function f1 doesn't return any value. (line 32)
+error - variable y is not defined - variable y has a scope only within the function f1. (line 33)
 
 ## Question 3
 
@@ -61,3 +66,12 @@ console.log(y);
 ```
 
 What will be the output of this code. Explain your answer in 50 words or less.
+
+On line 47 defines a global constant x with value 9.
+On line 54 calls function f1, but the result doesn't set to any variable.
+Function f1 gets the value of constant x as a parameter and doesn't change it (and even can't).
+On line 55 the result will be 9.
+On line 57 defines a global constant and sets to object.
+On line 64 calls function f2, but the result doesn't set to any variable.
+Nevertheless, function f2 gets an object y as a parameter and change its property. 
+On line 65 the result will be {x: 10}.

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

@@ -4,7 +4,8 @@ const personOne = {
     favouriteFood: 'Spinach'
 }
 
-function introduceYourself(___________________________) {
+function introduceYourself(anyPerson) {
+    let {name, age, favouriteFood} = anyPerson;
     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 +9,13 @@ let hogwarts = [
     { firstName: "Minerva", lastName: "McGonagall", house: "Gryffindor", pet: null, occupation: "Teacher" },
     { firstName: "Albus", lastName: "Dumbledore", house: "Gryffindor", pet: "Phoenix", occupation: "Teacher" }
 ]
+
+hogwarts.filter(person => person.house === "Gryffindor").forEach(person =>{
+    let {firstName, lastName} = person;
+    console.log(`${firstName} ${lastName}`);
+});
+console.log(" ");
+hogwarts.filter(person => person.occupation === "Teacher" && person.pet).forEach(person =>{
+    let {firstName, lastName} = person;
+    console.log(`${firstName} ${lastName}`);
+});

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

@@ -1,9 +1,28 @@
- 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 },
+];
+
+function getSpaces(words, length) {
+  while (("" + words).length < length) {
+    words += " ";
+  }
+  return words;
+}
+
+console.log(getSpaces("QTY", 8) + getSpaces("ITEM", 20) + "TOTAL");
+let total = 0;
+order.forEach((item) => {
+  let { itemName, quantity, unitPrice } = item;
+  let sum = quantity * unitPrice;
+  total += sum;
+  console.log(
+    getSpaces(quantity, 8) + getSpaces(itemName, 20) + sum.toFixed(2)
+  );
+});
+console.log("");
+console.log("Total: " + total.toFixed(2));