CodeYourFuture · Mathias02 · Jul 11, 2022 · Jul 11, 2022 · Jul 11, 2022 · Jul 12, 2022
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -12,15 +12,17 @@
 // Example 1
 let a;
 console.log(a);
-
+// Because there is no value is assigned to the variable a, 
 
 // Example 2
 function sayHello() {
     let message = "Hello";
 }
 
+
 let hello = sayHello();
 console.log(hello);
+// Since the function sayHello is missing the return statement invoking will it result in undefined
 
 
 // Example 3
@@ -30,7 +32,10 @@ function sayHelloToUser(user) {
 
 sayHelloToUser();
 
+// Since the function sayHelloToUser was defined with a parameter, however, invoking it will require an argument, and invoking it without an argument will result in undefined
+
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+// This operation will result in undefined because there is no index[3] in the array
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -7,8 +7,24 @@
 
 function evenNumbers(n) {
     // TODO
+const nums = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+
+let j = nums.slice(0, n);
+
+let i = 0;
+
+while( i < j.length){
+
+    console.log(j[i] * 2);
+    i ++;
 }
 
+return j;
+
+}
+
+
+
 evenNumbers(3); // should output 0,2,4
 evenNumbers(0); // should output nothing
 evenNumbers(10); // should output 0,2,4,6,8,10,12,14,16,18
diff --git a/1-exercises/C-while-loop-with-array/exercise.js b/1-exercises/C-while-loop-with-array/exercise.js
@@ -18,6 +18,16 @@ const BIRTHDAYS = [
 
 function findFirstJulyBDay(birthdays) {
     // TODO
+    let i = 0;
+
+
+    while(i < BIRTHDAYS.length){
+
+     if(BIRTHDAYS[i] === "July 11th") return "July 11th";
+
+        i++;
+    }
+
 }
 
 console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"
diff --git a/1-exercises/D-do-while/exercise.js b/1-exercises/D-do-while/exercise.js
@@ -7,7 +7,20 @@
 */
 
 function evenNumbersSum(n) {
+
     // TODO
+
+    let sums = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+
+    let sliced = sums.slice(0, n);
+    let sum = 0;
+
+    for(let slice of sliced){
+
+      sum += slice * 2;
+    }
+
+   return sum;
 }
 
 console.log(evenNumbersSum(3)); // should output 6

diff --git a/1-exercises/E-for-loop/exercise1.js b/1-exercises/E-for-loop/exercise1.js
@@ -6,9 +6,8 @@
 
 
 // Change the below code to use a for loop instead of a while loop.
-let i = 0;
-while(i < 26) {
+
+for(let i = 0; i < 26; i++) {
     console.log(String.fromCharCode(97 + i));
-    i++;
 }
 // The output shouldn't change.
diff --git a/1-exercises/E-for-loop/exercise2.js b/1-exercises/E-for-loop/exercise2.js
@@ -28,6 +28,12 @@ const AGES = [
 
 // TODO - Write for loop code here
 
+for(let i = 0; i < WRITERS.length; i++){
+
+    console.log(WRITERS[i].concat(' is ' + AGES[i] + " years old "));
+
+}
+
 /*
 The output should look something like this:
 
@@ -36,4 +42,5 @@ Zadie Smith is 40 years old
 Jane Austen is 41 years old
 Bell Hooks is 63 years old
 Yukiko Motoya is 49 years old
+
 */
diff --git a/1-exercises/F-for-of-loop/exercise.js b/1-exercises/F-for-of-loop/exercise.js
@@ -11,6 +11,13 @@ let tubeStations = [
     "Tottenham Court Road"
 ];
 
+for(let tubeStation of tubeStations){
+
+    console.log(tubeStation.toUpperCase());
+}
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+str.toUpperCase();
+
+
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -1,63 +1,72 @@
-/*
-    Imagine we're making a weather app!
-
-    We have a list of cities that the user wants to track.
-    We also already have a temperatureService function which will take a city as a parameter and return a temparature.
-
-    Implement the function below:
-        - take the array of cities as a parameter
-        - return an array of strings, which is a statement about the temperature of each city.
-            For example, "The temperature in London is 10 degrees"
-        - Hint: you can call the temperatureService function from your function
-*/
-
-function getTemperatureReport(cities) {
-    // TODO
-}
-
-
-/* ======= TESTS - DO NOT MODIFY ===== */
-
-function temperatureService(city) {
-    let temparatureMap  = new Map();
-
-    temparatureMap.set('London', 10);
-    temparatureMap.set('Paris', 12);
-    temparatureMap.set('Barcelona', 17);
-    temparatureMap.set('Dubai', 27);
-    temparatureMap.set('Mumbai', 29);
-    temparatureMap.set('São Paulo', 23);
-    temparatureMap.set('Lagos', 33);
-
-    return temparatureMap.get(city);
-}
-
-test("should return a temperature report for the user's cities", () => {
-    let usersCities = [
-        "London",
-        "Paris",
-        "São Paulo"
-    ]
-
-    expect(getTemperatureReport(usersCities)).toEqual([
-        "The temperature in London is 10 degrees",
-        "The temperature in Paris is 12 degrees",
-        "The temperature in São Paulo is 23 degrees"
-    ]);
-});
-
-test("should return a temperature report for the user's cities (alternate input)", () => {
-    let usersCities = [
-        "Barcelona",
-        "Dubai"
-    ]
-
-    expect(getTemperatureReport(usersCities)).toEqual([
-        "The temperature in Barcelona is 17 degrees",
-        "The temperature in Dubai is 27 degrees"
-    ]);
-});
-
-test("should return an empty array if the user hasn't selected any cities", () => {
-    expect(getTemperatureReport([])).toEqual([]);
+/*
+    Imagine we're making a weather app!
+
+    We have a list of cities that the user wants to track.
+    We also already have a temperatureService function which will take a city as a parameter and return a temparature.
+
+    Implement the function below:
+        - take the array of cities as a parameter
+        - return an array of strings, which is a statement about the temperature of each city.
+            For example, "The temperature in London is 10 degrees"
+        - Hint: you can call the temperatureService function from your function
+*/
+
+function getTemperatureReport(cities) {
+
+   let temp = temperatureService(city);
+   cities.forEach((city) =>{
+
+        city = `The temperature in ${city} is ${temp} degrees`;
+    })
+
+    return city;
+
+    // TODO
+}
+
+
+/* ======= TESTS - DO NOT MODIFY ===== */
+
+function temperatureService(city) {
+    let temparatureMap  = new Map();
+
+    temparatureMap.set('London', 10);
+    temparatureMap.set('Paris', 12);
+    temparatureMap.set('Barcelona', 17);
+    temparatureMap.set('Dubai', 27);
+    temparatureMap.set('Mumbai', 29);
+    temparatureMap.set('São Paulo', 23);
+    temparatureMap.set('Lagos', 33);
+
+    return temparatureMap.get(city);
+}
+
+test("should return a temperature report for the user's cities", () => {
+    let usersCities = [
+        "London",
+        "Paris",
+        "São Paulo"
+    ]
+
+    expect(getTemperatureReport(usersCities)).toEqual([
+        "The temperature in London is 10 degrees",
+        "The temperature in Paris is 12 degrees",
+        "The temperature in São Paulo is 23 degrees"
+    ]);
+});
+
+test("should return a temperature report for the user's cities (alternate input)", () => {
+    let usersCities = [
+        "Barcelona",
+        "Dubai"
+    ]
+
+    expect(getTemperatureReport(usersCities)).toEqual([
+        "The temperature in Barcelona is 17 degrees",
+        "The temperature in Dubai is 27 degrees"
+    ]);
+});
+
+test("should return an empty array if the user hasn't selected any cities", () => {
+    expect(getTemperatureReport([])).toEqual([]);
 });
diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -1,24 +1,35 @@
-/*
-    In the below example, we want to keep calling generateRandomNumber until we get a value that is > 50.
-    Implement this using a do-while loop.
-*/
-
-// This function shouldn't be changed
-function generateRandomNumber() {
-    console.log("Generating number...");
-    return Math.round(Math.random() * 100);
-}
-
-function getRandomNumberGreaterThan50() {
-    // TODO - implement using a do-while loop
-}
-
-/* ======= TESTS - DO NOT MODIFY ===== */
-
-test("Returned value should always be greater than 50", () => {
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
-});
+/*
+    In the below example, we want to keep calling generateRandomNumber until we get a value that is > 50.
+    Implement this using a do-while loop.
+*/
+
+// This function shouldn't be changed
+function generateRandomNumber() {
+    console.log("Generating number...");
+    return Math.round(Math.random() * 100);
+}
+
+function getRandomNumberGreaterThan50() {
+    // TODO - implement using a do-while loop
+
+    let random = 0;
+
+    do{
+
+     random = generateRandomNumber();
+
+    }while(random < 50);
+
+ return random;
+
+}
+
+/* ======= TESTS - DO NOT MODIFY ===== */
+
+test("Returned value should always be greater than 50", () => {
+    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+});