CodeYourFuture · rebwar1 · Sep 18, 2022 · Sep 18, 2022 · Sep 19, 2022 · Sep 19, 2022
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); // return undefined because a variable that has not been assigned a value
 
 // Example 2
 function sayHello() {
     let message = "Hello";
 }
 
 let hello = sayHello();
-console.log(hello);
-
+console.log(hello); // return undefined because value (message variable) was not returned.
 
 // Example 3
 function sayHelloToUser(user) {
-    console.log(`Hello ${user}`);
+    console.log(`Hello ${user}`); // return undefined because when call the function it is not have a argument
 }
 
 sayHelloToUser();
 
-
 // Example 4
-let arr = [1,2,3];
-console.log(arr[3]);
+let arr = [1, 2, 3];
+console.log(arr[3]); // return undefined because the value has not been assigned in index 3
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -6,9 +6,19 @@
 */
 
 function evenNumbers(n) {
-    // TODO
+    let count = 0;
+    let result = [];
+    if (n) {
+        while (count < n) {
+            // count === 0 ? result.push(count) : result.push(count * 2);
+            result.push(count * 2);
+            count++;
+        }
+    }
+    console.log(result);
+    console.log("--------------");
 }
 
 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
+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
@@ -13,11 +13,28 @@ const BIRTHDAYS = [
     "July 11th",
     "July 17th",
     "September 28th",
-    "November 15th"
+    "November 15th",
 ];
 
+// let July1 = BIRTHDAYS.filter((x) => x.split(" ")[0] === "July");
+// console.log(July1.sort()[0]);
+
+// Good use of split and index here.You could also use "break"
+// to exit the
+// while loop once you have found the first July date.
+
 function findFirstJulyBDay(birthdays) {
-    // TODO
+    let july = [];
+    let count = 0;
+
+    while (count < birthdays.length) {
+        if (birthdays[count].split(" ")[0] === "July") {
+            july.push(birthdays[count]);
+            break;
+        }
+        count++;
+    }
+    return july.sort()[0];
 }
 
-console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"
+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
@@ -5,9 +5,28 @@
 
     Using a do-while loop, write a function which returns the sum of the first n even numbers (starting from 0)
 */
+//💫
+// You need to re-read the question. You need the loop to add up the first n even numbers,
+//  starting at 0. So if n=3, you need to add up 0+2+4. If n=10 you
+// need to add up 0+2+4+6+8+10+12+14+16+18.
+//💫
 
 function evenNumbersSum(n) {
-    // TODO
+    let result = [0];
+    // for (let i = 1; i < n; i++) {
+    //     result[i] = i * 2 + result[i - 1];
+    // }
+    // let total = result[result.length - 1];
+    // return total;
+
+    let total;
+    let i = 1;
+    do {
+        result[i] = i * 2 + result[i - 1];
+        total = result[result.length - 1];
+        i++;
+    } while (i < n);
+    return total;
 }
 
 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
@@ -4,11 +4,14 @@
     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++;
-}
+// let i = 0;
+// while (i < 26) {
+//     console.log(String.fromCharCode(97 + i));
+//     i++;
+// }
 // The output shouldn't change.
+
+for (let i = 0; i < 26; i++) {
+    console.log(String.fromCharCode(65 + i), String.fromCharCode(97 + i));
+}
diff --git a/1-exercises/E-for-loop/exercise2.js b/1-exercises/E-for-loop/exercise2.js
@@ -15,19 +15,15 @@ const WRITERS = [
     "Zadie Smith",
     "Jane Austen",
     "Bell Hooks",
-    "Yukiko Motoya"
-]
-
-const AGES = [
-    59,
-    40,
-    41,
-    63,
-    49
+    "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:
 
@@ -36,4 +32,4 @@ 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
@@ -8,9 +8,18 @@ let tubeStations = [
     "Baker Street",
     "Picadilly Circus",
     "Oxford Street",
-    "Tottenham Court Road"
+    "Tottenham Court Road",
 ];
-
-
+for (let letter of tubeStations) {
+    console.log(letter);
+}
+console.log("_____________________");
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+let capitalise = "";
+for (let letter of str) {
+    capitalise += letter.toUpperCase();
+    console.log(letter.toUpperCase());
+}
+console.log("_____________________");
+console.log(capitalise);
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -10,51 +10,65 @@
             For example, "The temperature in London is 10 degrees"
         - Hint: you can call the temperatureService function from your function
 */
+// let usersCities = [
+//     "London",
+//     "Paris",
+//     "Barcelona",
+//     "Dubai",
+//     "Mumbai",
+//     "São Paulo",
+//     "Lagos",
+// ];
 
 function getTemperatureReport(cities) {
-    // TODO
+    let city = temperatureService;
+    let statementTempCity = cities.map(
+        (element) => `The temperature in ${element} is ${city(element)} degrees`
+    );
+    return statementTempCity;
 }
 
+/////////////////////////////////////////////////////////////
+// function getTemperatureReport(cities) {
+//     let city = temperatureService;
+//     return cities.forEach((element) =>
+//         console.log(`The temperature in ${element} is ${city(element)} degrees`)
+//     );
+// }
+// getTemperatureReport(usersCities);
 
 /* ======= 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);
-    
+    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"
-    ]
+    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"
+        "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"
-    ]
+    let usersCities = ["Barcelona", "Dubai"];
 
     expect(getTemperatureReport(usersCities)).toEqual([
         "The temperature in Barcelona is 17 degrees",
-        "The temperature in Dubai is 27 degrees"
+        "The temperature in Dubai is 27 degrees",
     ]);
 });
 

diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -8,11 +8,23 @@ function generateRandomNumber() {
     console.log("Generating number...");
     return Math.round(Math.random() * 100);
 }
+// let randomNum = generateRandomNumber;
 
 function getRandomNumberGreaterThan50() {
     // TODO - implement using a do-while loop
-}
+    let i = 100;
+    // let randomNumber = generateRandomNumber;
+    do {
+        let random = generateRandomNumber();
+        if (random > 50) {
+            return random;
+        }
 
+        i--;
+    } while (i > 50);
+}
+// console.log(getRandomNumberGreaterThan50());
+// getRandomNumberGreaterThan50();
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 test("Returned value should always be greater than 50", () => {
@@ -21,4 +33,4 @@ test("Returned value should always be greater than 50", () => {
     expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
     expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
     expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
-});
+});