CodeYourFuture · MohamedAbdi114 · Dec 7, 2022 · JDysiewicz · Dec 10, 2022 · JDysiewicz
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -10,27 +10,27 @@
 */
 
 // Example 1
-let a;
+let a;             // variable has no value assigned 
 console.log(a);
 
 
 // Example 2
 function sayHello() {
-    let message = "Hello";
+    let message = "Hello";     // no return value inside the function
 }
 
-let hello = sayHello();
+let hello = sayHello();  
 console.log(hello);
 
 
 // Example 3
 function sayHelloToUser(user) {
-    console.log(`Hello ${user}`);
+    console.log(`Hello ${user}`);   // no argument
 }
 
 sayHelloToUser();
 
 
 // Example 4
-let arr = [1,2,3];
+let arr = [1,2,3];    // index [3] not assigned the value in array
 console.log(arr[3]);
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -7,8 +7,20 @@
 
 function evenNumbers(n) {
     // TODO
+    let array = [];
+    let i = 0;
+    while (n > array.length) {
+      if (i % 2 === 0) {
+        array.push(i);
+      }
+      i++;
+    }
+
+    console.log(array);
 }
 
+
+
 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 +18,13 @@ const BIRTHDAYS = [
 
 function findFirstJulyBDay(birthdays) {
     // TODO
+
+    let i = 0;
+  while (i < birthdays.length) {
+    if (birthdays[i].includes("July")) 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
@@ -8,7 +8,19 @@
 
 function evenNumbersSum(n) {
     // TODO
-}
+    let sum = 0;
+    let i = 0;
+    do {
+      sum += i * 2;
+      i++;
+    } while (i < n);
+
+    return sum
+  }
+
+
+
+
 
 console.log(evenNumbersSum(3)); // should output 6
 console.log(evenNumbersSum(0)); // should output 0

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 +28,11 @@ 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
@@ -10,7 +10,12 @@ let tubeStations = [
     "Oxford Street",
     "Tottenham Court Road"
 ];
+for(let station of tubeStations){
+    console.log(station);}
 
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+for (let letters of str){
+    console.log(letters.toUpperCase());
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -13,7 +13,21 @@
 
 function getTemperatureReport(cities) {
     // TODO
+    let tempArray = [];
+    for (let i = 0; i < cities.length; i++) { 
+      let temp = temperatureService(cities[i]);
+        console.log(temp);
+        tempArray[i] = "The temperature in " + cities[i] + " is " + temp + " degrees";
+    }
+    return tempArray
 }
+
+
+
+
+
+
+
 
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -11,8 +11,21 @@ function generateRandomNumber() {
 
 function getRandomNumberGreaterThan50() {
     // TODO - implement using a do-while loop
+    let randomNumber = 0;
+
+    do {
+        randomNumber = generateRandomNumber();
+    }
+    while (randomNumber <= 50);
+
+    return randomNumber;
+
 }
 
+
+
+
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 test("Returned value should always be greater than 50", () => {

diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
@@ -6,15 +6,28 @@
 */
 function potentialHeadlines(allArticleTitles) {
     // TODO
+    let newArray = [];
+    for (let i = 0; i < allArticleTitles.length;i++) { 
+
+        if (allArticleTitles[i].length <= 65) {
+            newArray.push(allArticleTitles[i]);
+         }
+    }
+    return newArray;
+
 }
 
+
 /*
     The editor of the FT likes short headlines with only a few words!
     Implement the function below, which returns the title with the fewest words.
     (you can assume words will always be seperated by a space)
 */
 function titleWithFewestWords(allArticleTitles) {
     // TODO
+    let arr = allArticleTitles;
+    let newArr = [...allArticleTitles].sort((a, b) => a.length - b.length);
+    return newArr[0];
 }
 
 /*
@@ -24,14 +37,32 @@ function titleWithFewestWords(allArticleTitles) {
 */
 function headlinesWithNumbers(allArticleTitles) {
     // TODO
+    let newArray = [];
+    for (let i = 0; i < allArticleTitles.length; i++) {
+      if (/\d/.test(allArticleTitles[i])) {
+        newArray.push(allArticleTitles[i]);
+      }
+    }
+
+    return newArray;
 }
+
+
+
 
 /*
     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 average = 0;
+    for (let i = 0; i < allArticleTitles.length; i++) {
+        average += allArticleTitles[i].length;
+    }
+    return parseInt(average / allArticleTitles.length);
+
 }
 
 

diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
@@ -35,8 +35,19 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
 */
 function getAveragePrices(closingPricesForAllStocks) {
     // TODO
+    let averageStock = [];
+  let sum = 0;
+  for (let stockPriceBrand of closingPricesForAllStocks) {
+    for (let unitStockPriceBrand of stockPriceBrand) {
+      sum += unitStockPriceBrand;
+    }
+    let averageAllStock = sum / 5;
+    averageStock.push(parseFloat(averageAllStock.toFixed(2)));
+    sum = 0;
+  }
+  return averageStock;
 }
-
+    
 /*
     We also want to see what the change in price is from the first day to the last day for each stock.
     Implement the below function, which
@@ -49,8 +60,17 @@ function getAveragePrices(closingPricesForAllStocks) {
 */
 function getPriceChanges(closingPricesForAllStocks) {
     // TODO
+    let priceChangeStock = [];
+    for (let stockPriceBrand of closingPricesForAllStocks) {
+      let priceChangeBrand = stockPriceBrand[4] - stockPriceBrand[0];
+      let FormattedPriceChangeBrand = parseFloat(priceChangeBrand.toFixed(2));
+    priceChangeStock.push(FormattedPriceChangeBrand);
+    priceChangeBrand = 0;
+  }
+  return priceChangeStock;
 }
 
+
 /*
     As part of a financial report, we want to see what the highest price was for each stock in the last 5 days.
     Implement the below function, which
@@ -65,6 +85,15 @@ function getPriceChanges(closingPricesForAllStocks) {
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
     // TODO
+    let highPrice=[];
+
+    stocks.forEach((stock,item) => {
+        highPrice.push(
+          `The highest price of ${stock.toUpperCase()} in the last 5 days was ${Math.max(...closingPricesForAllStocks[item]).toFixed(2)}`
+        );
+    });
+    return highPrice;
+
 }
 
 

diff --git a/3-extra/1-factorial.js b/3-extra/1-factorial.js
@@ -10,10 +10,17 @@
 
 function factorial(input) {
     // TODO
+    if (input === 0 || input === 1) {
+        return 1;
+      } else {
+        for (let i = input - 1; i >= 1; i--) {
+          input = input * i;
+        }
+        return input;
+      }
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
-
 test("3! should be 6", () => {
     expect(factorial(3)).toEqual(6);
 });
@@ -25,3 +32,4 @@ test("5! should be 120", () => {
 test("10! should be 3628800", () => {
     expect(factorial(10)).toEqual(3628800);
 });
+
diff --git a/3-extra/2-array-of-objects.js b/3-extra/2-array-of-objects.js
@@ -12,9 +12,34 @@
 
 function getHighestRatedInEachGenre(books) {
     // TODO
+    let resultBooks = {};
+    let genres = [];
+    let result = [];
+
+    for (let i = 0; i < books.length; i++) {
+      let genre = books[i]["genre"];
+      if (genres.indexOf(genre) < 0) {
+        genres.push(genre);
+      }
+
+      if (
+        !resultBooks[genre] ||
+        !resultBooks[genre]["rating"] ||
+        resultBooks[genre]["rating"] < books[i]["rating"]
+      ) {
+        resultBooks[genre] = books[i];
+      }
+    }
+    for (let i = 0; i < genres.length; i++) {
+      result.push(resultBooks[genres[i]]["title"]);
+    }
+
+    return result;
+
 }
 
 
+
 /* ======= Book data - DO NOT MODIFY ===== */
 const BOOKS = [
     {

diff --git a/3-extra/3-fibonacci.js b/3-extra/3-fibonacci.js
@@ -15,6 +15,16 @@
 
 function generateFibonacciSequence(n) {
     // TODO
+    let fib = [0, 1];
+    let data = [];
+
+    for (let i = 2; i < n; i++) {
+      fib[i] = fib[i - 1] + fib[i - 2];
+      data.push(fib[i]);
+    }
+
+    return fib;
+
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */