CodeYourFuture · Khlil1313 · Mar 2, 2023 · Mar 2, 2023 · Mar 3, 2023 · Mar 3, 2023
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -11,15 +11,15 @@
 
 // Example 1
 let a;
-console.log(a);
+console.log(a); //we didn't assign a value to the variable a 
 
 
 // Example 2
 function sayHello() {
-    let message = "Hello";
+    let message = "Hello"; // the function sayHello() doesn't return anything
 }
 
-let hello = sayHello();
+let hello = sayHello(); 
 console.log(hello);
 
 
@@ -28,9 +28,10 @@ function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
 
-sayHelloToUser();
+sayHelloToUser();  // we didn't insert any input in the function sayHelloToUser()
 
 
 // Example 4
 let arr = [1,2,3];
-console.log(arr[3]);
+console.log(arr[3]);  // the array arr is containing 3 elements with idexes 0,1,2. The index 3 is not avaiable in the array arr
+
diff --git a/1-exercises/B-array-literals/exercise.js b/1-exercises/B-array-literals/exercise.js
@@ -4,8 +4,8 @@
   Declare some variables assigned to arrays of values
 */
 
-let numbers = []; // add numbers from 1 to 10 into this array
-let mentors; // Create an array with the names of the mentors: Daniel, Irina and Rares
+let numbers = [1,2,3,4,5,6,7,8,9,10]; // add numbers from 1 to 10 into this array
+let mentors = ["Daniel", "Irina", "Rares"]; // Create an array with the names of the mentors: Daniel, Irina and Rares
 
 /* 
   DO NOT EDIT BELOW THIS LINE

diff --git a/1-exercises/C-array-get-set/exercise.js b/1-exercises/C-array-get-set/exercise.js
@@ -5,11 +5,11 @@
 */
 
 function first(arr) {
-  return; // complete this statement
+  return arr[0]; // complete this statement
 }
 
 function last(arr) {
-  return; // complete this statement
+  return arr[arr.length - 1]; // complete this statement
 }
 
 /* 

diff --git a/1-exercises/C-array-get-set/exercises2.js b/1-exercises/C-array-get-set/exercises2.js
@@ -7,6 +7,8 @@
 */
 
 let numbers = [1, 2, 3]; // Don't change this array literal declaration
+numbers[3] = 4;
+numbers[0] = 1;
 
 /* 
   DO NOT EDIT BELOW THIS LINE

diff --git a/1-exercises/D-for-loop/exercise.js b/1-exercises/D-for-loop/exercise.js
@@ -27,6 +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/E-while-loop-with-array/exercise.js b/1-exercises/E-while-loop-with-array/exercise.js
@@ -17,7 +17,15 @@ const BIRTHDAYS = [
 ];
 
 function findFirstJulyBDay(birthdays) {
-    // TODO
+    // for (let i = 0; i < birthdays.length; i++) {
+    //     if (birthdays[i].charAt("July")) {
+    //         return birthdays[i]
+    //     }
+    // }
+
+    const firstBirthdayInJuly = birthdays.find (element => element == "July")
+    return firstBirthdayInJuly
+
 }
 
 console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -13,9 +13,18 @@
 
 function getTemperatureReport(cities) {
     // TODO
+    let resultArray = []
+    for (let city of cities) {
+        let text = "The temperature in "+ city + " is " + temperatureService(city) + " degrees";
+        resultArray.push(text)
+
+    }
+    return resultArray
 }
 
 
+
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 function temperatureService(city) {
@@ -31,6 +40,9 @@ function temperatureService(city) {
 
     return temparatureMap.get(city);
 }
+// test("Should return an array of the same argument", () => {
+//     expect(getTemperatureReport(usersCities).length).toEqual(3)
+// });
 
 test("should return a temperature report for the user's cities", () => {
     let usersCities = [

diff --git a/2-mandatory/2-financial-times.js b/2-mandatory/2-financial-times.js
@@ -6,6 +6,14 @@
 */
 function potentialHeadlines(allArticleTitles) {
     // TODO
+    let articleTitlesLessThan65 = []
+    for (article of allArticleTitles) {
+        if (article.length <= 65) {
+            articleTitlesLessThan65.push(article)
+        }
+    }
+    return articleTitlesLessThan65
+
 }
 
 /*
@@ -14,7 +22,27 @@ function potentialHeadlines(allArticleTitles) {
     (you can assume words will always be seperated by a space)
 */
 function titleWithFewestWords(allArticleTitles) {
-    // TODO
+
+    let shortestTitle;
+    // let shortestTitleWordCount = Infinity;
+    let shortestTitleWordCount;
+
+
+    let firstWord;
+    for (let title of allArticleTitles) {
+
+        let wordCount = title.split(" ").length;
+        if (wordCount < (shortestTitleWordCount) || (shortestTitle === undefined)){
+            shortestTitleWordCount = wordCount
+            shortestTitle = title        
+        }
+
+
+    }
+    return shortestTitle
+
+
+
 }
 
 /*
@@ -23,15 +51,30 @@ 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 arrayTitlesWithNumbers =[]
+    for (let title of allArticleTitles) {
+        if (/\d/.test(title)) {
+            arrayTitlesWithNumbers.push(title)
+        }
+    }
+    return arrayTitlesWithNumbers
 }
 
+
 /*
     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 sum = 0;
+    let count = 0;
+    for (let title of allArticleTitles) {
+        let wordCount = title.length;       
+        sum += wordCount;
+        count += 1;
+    }
+    let average = sum / count;
+    return Math.round(average);
 }
 
 

diff --git a/2-mandatory/3-stocks.js b/2-mandatory/3-stocks.js
@@ -34,7 +34,18 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
         Functions can help with this!
 */
 function getAveragePrices(closingPricesForAllStocks) {
-    // TODO
+     let sum = 0;    
+    let averageArray = []
+    for (let i = 0; i < 5; i++) {
+        for (let j = 0; j < 5; j++){
+            sum += closingPricesForAllStocks[i][j]           
+        }
+
+       let average = sum / 5;
+       averageArray.push(Math.round(average *100)/100)
+        sum = 0;
+    }
+    return averageArray
 }
 
 /*
@@ -48,7 +59,19 @@ function getAveragePrices(closingPricesForAllStocks) {
     The price change value should be rounded to 2 decimal places, and should be a number (not a string)
 */
 function getPriceChanges(closingPricesForAllStocks) {
-    // TODO
+    let priceChangeArray = []
+    let priceChange = 0
+    let priceOnFirstDay = 0
+    let priceOnLastDay = 0
+    for (let i = 0; i < 5; i++) {
+        for (let j = 0; j < 5; j++) {
+            priceOnFirstDay = closingPricesForAllStocks[i][0]
+            priceOnLastDay = closingPricesForAllStocks[i][4]               
+        }
+        priceChange = priceOnLastDay - priceOnFirstDay
+        priceChangeArray.push(Math.round(priceChange * 100) / 100)
+    }
+    return priceChangeArray
 }
 
 /*
@@ -63,11 +86,41 @@ function getPriceChanges(closingPricesForAllStocks) {
     The stock ticker should be capitalised.
     The price should be shown with exactly 2 decimal places.
 */
+
+function highestPriceFunction (closingPricesForAllStocks) {
+let highestPriceArray = []
+let price = 0
+let highestPrice = 0
+    for (let i = 0; i < 5; i++) {
+        for (let j = 0; j < 5; j++) {
+            if (closingPricesForAllStocks[i][j] > price) {
+               highestPrice = closingPricesForAllStocks[i][j]
+               price = highestPrice
+            } 
+        }
+        highestPriceArray.push(highestPrice)
+        price = 0
+    }
+    return highestPriceArray
+
+}
+
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
-    // TODO
+    let resultArray = []
+    highestPriceArray =  highestPriceFunction (closingPricesForAllStocks)
+    for (let i = 0; i < 5; i++) {
+        for(let j = 0; j < 5; j++) {
+            if (i === j) {
+                resultArray.push("The highest price of " + stocks[i].toUpperCase() + " in the last 5 days was " + highestPriceArray[j].toFixed(2))
+            }
+        }
+    }
+    return resultArray
 }
 
 
+
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 test("should return the average price for each stock", () => {
     expect(getAveragePrices(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS)).toEqual(