CodeYourFuture · Riyaazct · Jul 13, 2022 · Jul 15, 2022 · Aug 9, 2022 · Aug 10, 2022
diff --git a/.vscode/launch.json b/.vscode/launch.json
@@ -0,0 +1,7 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": []
+}
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -11,26 +11,23 @@
 
 // Example 1
 let a;
-console.log(a);
-
+console.log(a); // A VARIABLE HAS BEEN DEFINED BUT NOT ASSIGNED A VALUE, THEREFORE IT WILL RETURN AN UNDEFINED VALUE WHEN ACCESSING THE VARIABLE.
 
 // Example 2
 function sayHello() {
-    let message = "Hello";
+  let message = "Hello"; // A FUNCTION WITH THAT DOES NOT HAVE A RETURN WILL COME BACK AS UNDEFINED.
 }
 
-let hello = sayHello();
-console.log(hello);
-
+let hello = sayHello(); // sayHello IN THIS CASE IS NOT A COMPLETED FUNCTION SO WILL DO NOTHING WHEN CALLED UPON.
+console.log(hello); // THE OUTPUT OF WHICH, GIVES AN UNDEFINED MESSAGE.
 
 // Example 3
 function sayHelloToUser(user) {
-    console.log(`Hello ${user}`);
+  console.log(`Hello ${user}`); // THE PARAMETER REQUIRES AN ARGUMENT WHEN THE FUNCTION IS CALLED. ARGUMENT IN THIS CASE IS BLANK SO THE OUTPUT IS UNDEFINED.
 }
 
 sayHelloToUser();
 
-
 // Example 4
-let arr = [1,2,3];
-console.log(arr[3]);
+let arr = [1, 2, 3]; // THIS ARRAY CONSISTS OF ONLY 3 NUMBERS WITH AN INDEX THAT STARTS AT ZERO, SO THE HIGHEST NUMBER IS 2
+console.log(arr[3]); // AND THE USER IS TRYING TO ACCESS A FOURTH NUMBER WHICH WOULD HAVE HAD AN INDEX NUMBER OF 3 WERE IT
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -5,10 +5,16 @@
     The list of numbers should start with 0. n is being passed in as a parameter.
 */
 
+i = 0;
+const numbers = [];
 function evenNumbers(n) {
-    // TODO
+  while (numbers.length < n) {
+    numbers.push(i);
+    i += 2;
+  }
+  console.log(numbers.toString());
 }
 
-evenNumbers(3); // should output 0,2,4
-evenNumbers(0); // should output nothing
+// 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
@@ -5,19 +5,27 @@
 */
 
 const BIRTHDAYS = [
-    "January 7th",
-    "February 12th",
-    "April 3rd",
-    "April 5th",
-    "May 3rd",
-    "July 11th",
-    "July 17th",
-    "September 28th",
-    "November 15th"
+  "January 7th",
+  "February 12th",
+  "April 3rd",
+  "April 5th",
+  "May 3rd",
+  "July 11th",
+  "July 17th",
+  "September 28th",
+  "November 15th",
 ];
-
+let i = 0;
 function findFirstJulyBDay(birthdays) {
-    // TODO
+  // TODO
+  while (i < birthdays.length) {
+    if (birthdays[i].includes("July")) {
+      return birthdays[i];
+    }
+    i++;
+  }
 }
 
-console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"
+console.log(findFirstJulyBDay(BIRTHDAYS));
+
+// 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
@@ -7,9 +7,16 @@
 */
 
 function evenNumbersSum(n) {
-    // TODO
+  i = 0;
+  sum = 0;
+  do {
+    sum = sum + i * 2;
+    i++;
+  } while (i < n);
+
+  return sum;
 }
 
 console.log(evenNumbersSum(3)); // should output 6
 console.log(evenNumbersSum(0)); // should output 0
-console.log(evenNumbersSum(10)); // should output 90
+console.log(evenNumbersSum(10)); // should output 90
diff --git a/1-exercises/E-for-loop/exercise1.js b/1-exercises/E-for-loop/exercise1.js
@@ -4,11 +4,8 @@
     Change the while loop below into a for loop.
 */
 
-
 // Change the below code to use a for loop instead of a while loop.
-let i = 0;
-while(i < 26) {
-    console.log(String.fromCharCode(97 + i));
-    i++;
-}
+
+for (let i = 0; i < 26; i++) console.log(String.fromCharCode(97 + i));
+
 // The output shouldn't change.
diff --git a/1-exercises/E-for-loop/exercise2.js b/1-exercises/E-for-loop/exercise2.js
@@ -11,23 +11,19 @@
 */
 
 const WRITERS = [
-    "Virginia Woolf",
-    "Zadie Smith",
-    "Jane Austen",
-    "Bell Hooks",
-    "Yukiko Motoya"
-]
-
-const AGES = [
-    59,
-    40,
-    41,
-    63,
-    49
+  "Virginia Woolf",
+  "Zadie Smith",
+  "Jane Austen",
+  "Bell Hooks",
+  "Yukiko Motoya",
 ];
 
-// TODO - Write for loop code here
+const AGES = [59, 40, 41, 63, 49];
 
+// TODO - Write for loop code here
+for (let i = 0; i < WRITERS.length; i++) {
+  console.log(WRITERS[i] + " is " + AGES[i] + " years old");
+}
 /*
 The output should look something like this:
 

diff --git a/1-exercises/F-for-of-loop/exercise.js b/1-exercises/F-for-of-loop/exercise.js
@@ -4,13 +4,18 @@
 
 // TODO Use a for-of loop to output each of the tube stations below.
 let tubeStations = [
-    "Aldgate",
-    "Baker Street",
-    "Picadilly Circus",
-    "Oxford Street",
-    "Tottenham Court Road"
+  "Aldgate",
+  "Baker Street",
+  "Picadilly Circus",
+  "Oxford Street",
+  "Tottenham Court Road",
 ];
-
+for (let i of tubeStations) {
+  console.log(i);
+}
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+for (let i of "codeyourfuture") {
+  console.log(i.toUpperCase());
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -2,7 +2,7 @@
     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.
+    We also already have a temperatureService function which will take a city as a parameter and return a temperature.
 
     Implement the function below:
         - take the array of cities as a parameter
@@ -12,52 +12,52 @@
 */
 
 function getTemperatureReport(cities) {
-    // TODO
+  let result = cities.map(
+    (element) =>
+      "The temperature in " +
+      element +
+      " is " +
+      temperatureService(element) +
+      " degrees"
+  );
+  return result;
 }
 
-
 /* ======= 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);
+  let temperatureMap = new Map();
+
+  temperatureMap.set("London", 10);
+  temperatureMap.set("Paris", 12);
+  temperatureMap.set("Barcelona", 17);
+  temperatureMap.set("Dubai", 27);
+  temperatureMap.set("Mumbai", 29);
+  temperatureMap.set("São Paulo", 23);
+  temperatureMap.set("Lagos", 33);
+
+  return temperatureMap.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"
-    ]);
+  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"
-    ]);
+  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([]);
-});
+  expect(getTemperatureReport([])).toEqual([]);
+});
diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -5,20 +5,25 @@
 
 // This function shouldn't be changed
 function generateRandomNumber() {
-    console.log("Generating number...");
-    return Math.round(Math.random() * 100);
+  console.log("Generating number...");
+  return Math.round(Math.random() * 100);
 }
 
 function getRandomNumberGreaterThan50() {
-    // TODO - implement using a do-while loop
+  // TODO - implement using a do-while loop
+  let i = 0;
+  do {
+    i++;
+    return generateRandomNumber();
+  } while (i < 50);
 }
 
 /* ======= 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);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
 });