CodeYourFuture · ChidimmaOfodum · Aug 13, 2022 · Aug 14, 2022 · Aug 14, 2022 · Aug 14, 2022
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -11,26 +11,26 @@
 
 // Example 1
 let a;
-console.log(a);
+console.log(a); // a variable was declared but not assigned any value
 
 
 // Example 2
 function sayHello() {
-    let message = "Hello";
+    let message = "Hello"; // when a function doesn't return anything
 }
 
 let hello = sayHello();
-console.log(hello);
+console.log(hello);    // invoking a function that doesn't return anything
 
 
 // Example 3
 function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
 
-sayHelloToUser();
+sayHelloToUser(); // a function declared with a parameter but doesn't receive any argument
 
 
 // Example 4
 let arr = [1,2,3];
-console.log(arr[3]);
+console.log(arr[3]); // the index is not contained in the array
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -5,10 +5,18 @@
     The list of numbers should start with 0. n is being passed in as a parameter.
 */
 
-function evenNumbers(n) {
-    // TODO
-}
 
+ function evenNumbers(n) {
+   let arrayOfEvenNumbers = [];
+   let i = 0;
+   while (n > arrayOfEvenNumbers.length) {
+     if (i % 2 === 0) {
+       arrayOfEvenNumbers.push(i);
+     }
+     i++;
+   }
+   console.log(arrayOfEvenNumbers);
+ }
 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(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 +5,26 @@
 */
 
 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",
 ];
 
 function findFirstJulyBDay(birthdays) {
-    // TODO
+  let i = 0;
+  while (i < birthdays.length) {
+    let month = birthdays[i].substr(0, 3);
+    if (month === "Jul") {
+      return birthdays[i];
+    }
+    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
@@ -7,9 +7,19 @@
 */
 
 function evenNumbersSum(n) {
-    // TODO
+  let i = 0;
+  const arrayEven = [];
+  do {
+    if (i % 2 === 0) {
+       arrayEven.push(i);
+    }
+    i++
+  } while (n > arrayEven.length)
+
+  let sum = arrayEven.reduce((acc, curr) => acc + curr, 0);
+  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
@@ -6,9 +6,7 @@
 
 
 // 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
@@ -27,7 +27,9 @@ const AGES = [
 ];
 
 // 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
@@ -11,6 +11,13 @@ let tubeStations = [
     "Tottenham Court Road"
 ];
 
+for (stations of tubeStations){
+    console.log(stations)
+}
+
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+for (char of str){
+    console.log(char.toUpperCase())
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -12,7 +12,8 @@
 */
 
 function getTemperatureReport(cities) {
-    // TODO
+let cityTemperatures = cities.map(city => `The temperature in ${city} is ${temperatureService(city)} degrees`)
+return cityTemperatures
 }
 
 

diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -10,7 +10,10 @@ function generateRandomNumber() {
 }
 
 function getRandomNumberGreaterThan50() {
-    // TODO - implement using a do-while loop
+    do {
+       value =  generateRandomNumber()  
+    } while( value <= 50)
+    return value
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
@@ -5,7 +5,8 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
-    // TODO
+  let selectedHeadings = allArticleTitles.filter(article => article.length <= 65);
+  return selectedHeadings;
 }
 
 /*
@@ -14,7 +15,8 @@ function potentialHeadlines(allArticleTitles) {
     (you can assume words will always be seperated by a space)
 */
 function titleWithFewestWords(allArticleTitles) {
-    // TODO
+  let smallestArticle = allArticleTitles.reduce((initial, next) => (initial.length < next.length)? initial : next);
+  return smallestArticle;
 }
 
 /*
@@ -23,59 +25,75 @@ function titleWithFewestWords(allArticleTitles) {
     (Hint: remember that you can also loop through the characters of a string if you need to)
 */
 function headlinesWithNumbers(allArticleTitles) {
-    // TODO
+  let selectedHeadings = allArticleTitles.filter((element) => {
+    for (let i = 0; i < element.length; i++) {
+      if (parseInt(element[i])) {
+        return true;
+      }
+    }
+    return false;
+  });
+  return selectedHeadings;
 }
 
 /*
     The Financial Times wants to understand what the average number of characters in an article title is.
     Implement the function below to return this number - rounded to the nearest integer.
 */
 function averageNumberOfCharacters(allArticleTitles) {
-    // TODO
-}
+  let totalCharacters = allArticleTitles.reduce((acc, curr) => acc + (curr.length), 0);
 
+  let average = totalCharacters / (allArticleTitles.length)
 
+  return Math.round(average);
+}
 
 /* ======= List of Articles - DO NOT MODIFY ===== */
 const ARTICLE_TITLES = [
-    "Streaming wars drive media groups to spend more than $100bn on new content",
-    "Amazon Prime Video India country head: streaming is driving a TV revolution",
-    "Aerospace chiefs prepare for bumpy ride in recovery of long-haul flights",
-    "British companies look to muscle in on US retail investing boom",
-    "Libor to take firm step towards oblivion on New Year's Day",
-    "Audit profession unattractive to new recruits, says PwC boss",
-    "Chinese social media users blast Elon Musk over near miss in space",
-    "Companies raise over $12tn in 'blockbuster' year for global capital markets",
-    "The three questions that dominate investment",
-    "Brussels urges Chile's incoming president to endorse EU trade deal",
+  "Streaming wars drive media groups to spend more than $100bn on new content",
+  "Amazon Prime Video India country head: streaming is driving a TV revolution",
+  "Aerospace chiefs prepare for bumpy ride in recovery of long-haul flights",
+  "British companies look to muscle in on US retail investing boom",
+  "Libor to take firm step towards oblivion on New Year's Day",
+  "Audit profession unattractive to new recruits, says PwC boss",
+  "Chinese social media users blast Elon Musk over near miss in space",
+  "Companies raise over $12tn in 'blockbuster' year for global capital markets",
+  "The three questions that dominate investment",
+  "Brussels urges Chile's incoming president to endorse EU trade deal",
 ];
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 test("should only return potential headlines", () => {
-    expect(new Set(potentialHeadlines(ARTICLE_TITLES))).toEqual(new Set([
-        "British companies look to muscle in on US retail investing boom",
-        "Libor to take firm step towards oblivion on New Year's Day",
-        "Audit profession unattractive to new recruits, says PwC boss",
-        "The three questions that dominate investment"
-    ]));
+  expect(new Set(potentialHeadlines(ARTICLE_TITLES))).toEqual(
+    new Set([
+      "British companies look to muscle in on US retail investing boom",
+      "Libor to take firm step towards oblivion on New Year's Day",
+      "Audit profession unattractive to new recruits, says PwC boss",
+      "The three questions that dominate investment",
+    ])
+  );
 });
 
 test("should return an empty array for empty input", () => {
-    expect(potentialHeadlines([])).toEqual([]);
+  expect(potentialHeadlines([])).toEqual([]);
 });
 
 test("should return the title with the fewest words", () => {
-    expect(titleWithFewestWords(ARTICLE_TITLES)).toEqual("The three questions that dominate investment");
+  expect(titleWithFewestWords(ARTICLE_TITLES)).toEqual(
+    "The three questions that dominate investment"
+  );
 });
 
 test("should only return headlines containing numbers", () => {
-    expect(new Set(headlinesWithNumbers(ARTICLE_TITLES))).toEqual(new Set([
-        "Streaming wars drive media groups to spend more than $100bn on new content",
-        "Companies raise over $12tn in 'blockbuster' year for global capital markets"
-    ]));
+  expect(new Set(headlinesWithNumbers(ARTICLE_TITLES))).toEqual(
+    new Set([
+      "Streaming wars drive media groups to spend more than $100bn on new content",
+      "Companies raise over $12tn in 'blockbuster' year for global capital markets",
+    ])
+  );
 });
 
 test("should return the average number of characters in a headline", () => {
-    expect(averageNumberOfCharacters(ARTICLE_TITLES)).toEqual(65);
+  expect(averageNumberOfCharacters(ARTICLE_TITLES)).toEqual(65);
 });
-Original file line number
+Diff line change
@@ Expand Up / @@ -12,7 +12,8 @@ @@
     */
     function getTemperatureReport(cities) {
-        // TODO
+    let cityTemperatures = cities.map(city => `The temperature in ${city} is ${temperatureService(city)} degrees`)
+    return cityTemperatures
     }
@@ Expand Down @@