CodeYourFuture · Farnooshmo · Dec 14, 2022 · Dec 14, 2022 · Dec 14, 2022 · Dec 15, 2022
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -10,13 +10,13 @@
 */
 
 // Example 1
-let a;
+let a;  // The a variable has declared and need to be assigned to a value. let a = 12; or let a = "Hello";
 console.log(a);
 
 
 // Example 2
 function sayHello() {
-    let message = "Hello";
+    let message = "Hello"; // The function doesn't have return, therefore it is undefined.
 }
 
 let hello = sayHello();
@@ -28,9 +28,9 @@ function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
 
-sayHelloToUser();
+sayHelloToUser(); // There is no value for the parameter, user is undefined.
 
 
 // Example 4
 let arr = [1,2,3];
-console.log(arr[3]);
+console.log(arr[3]); //The arr[3] refers to an item that does not exist. 
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -6,7 +6,13 @@
 */
 
 function evenNumbers(n) {
-    // TODO
+    let arr = [];
+    let i = 0;
+    while(i < n) {
+   arr.push(i * 2);
+        i++;  
+    }
+   console.log(arr.join()); 
 }
 
 evenNumbers(3); // should output 0,2,4

diff --git a/1-exercises/C-while-loop-with-array/exercise.js b/1-exercises/C-while-loop-with-array/exercise.js
@@ -17,7 +17,15 @@ const BIRTHDAYS = [
 ];
 
 function findFirstJulyBDay(birthdays) {
-    // TODO
+
+    let i = 0;
+    while(i < BIRTHDAYS.length){
+        if(BIRTHDAYS[i].startsWith("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
@@ -7,7 +7,15 @@
 */
 
 function evenNumbersSum(n) {
-    // TODO
+
+    let i = 0;
+    let sum = 0;
+    do {
+        sum += (i * 2);
+        i++;
+     }
+     while(n > i);
+     return sum;
 }
 
 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
@@ -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
@@ -26,7 +26,10 @@ const AGES = [
     49
 ];
 
-// TODO - Write for loop code here
+for(i = 0; i < WRITERS.length; i++){
+    let ageOfWriters = WRITERS[i] + " is " + AGES[i] + " years old";
+    console.log(ageOfWriters);
+}
 
 /*
 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 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( let letter of str){
+    console.log(letter.toUpperCase());
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -12,7 +12,13 @@
 */
 
 function getTemperatureReport(cities) {
-    // TODO
+
+    let temperatureOfCity = [];
+    for(let city of cities){
+        let temperature = temperatureService(city);
+        temperatureOfCity.push('The temperature in '+ city + ' is '+ temperature +' degrees');
+    } 
+    return temperatureOfCity;
 }
 
 

diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -10,7 +10,13 @@ function generateRandomNumber() {
 }
 
 function getRandomNumberGreaterThan50() {
-    // TODO - implement using a do-while loop
+    let number = 0;
+
+    do{
+        number = generateRandomNumber();
+    }
+    while (number <= 50)
+    return number;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
@@ -5,16 +5,27 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
-    // TODO
+    newArticleArray =[];
+    for(let title of allArticleTitles){
+        if(title.length <= 65){
+            newArticleArray.push(title);
+        }
+    }
+    return newArticleArray;
 }
-
 /*
     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 shortestTitle = allArticleTitles[0];
+   for(let title of allArticleTitles){
+    if(title.split(" ").length < shortestTitle.split(" ").length){
+        shortestTitle = title;
+    }
+   }
+   return shortestTitle;
 }
 
 /*
@@ -23,15 +34,27 @@ 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 newArrayOfHeadlines = [];
+     for(let allTitles  of allArticleTitles){
+        if(allTitles.match(/\d/)){
+         newArrayOfHeadlines.push(allTitles);
+        }
+     }
+     return newArrayOfHeadlines;
+    }
+
 
 /*
     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 numberOfCharacters = 0;
+    for(let article of allArticleTitles){
+        numberOfCharacters += article.length;
+    }
+    let averageCharacters = Math.round(numberOfCharacters / allArticleTitles.length);
+    return averageCharacters;
 }
 
 

diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
@@ -7,6 +7,7 @@
             For example, CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS[2] contains the prices for the last 5 days for STOCKS[2] (which is amzn)
 */
 
+
 /* ======= Stock data - DO NOT MODIFY ===== */
 const STOCKS = ["aapl", "msft", "amzn", "googl", "tsla"];
 
@@ -33,9 +34,24 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
         Solve the smaller problems, and then build those solutions back up to solve the larger problem.
         Functions can help with this!
 */
-function getAveragePrices(closingPricesForAllStocks) {
-    // TODO
-}
+
+function getAverage(closingPrices){
+    let sum = 0;
+    for(let i = 0; i < closingPrices.length; i++){
+        sum += closingPrices[i];
+    }
+    return sum / closingPrices.length;
+};
+
+function getAveragePrices(closingPricesForAllStocks){
+    let averagePrices = [];
+    for(let closingPrices of closingPricesForAllStocks){
+        let averagePrice = getAverage(closingPrices);
+        averagePrice = Math.round(averagePrice * 100)/100;
+        averagePrices.push(averagePrice);
+    }
+    return averagePrices;
+};
 
 /*
     We also want to see what the change in price is from the first day to the last day for each stock.
@@ -48,7 +64,13 @@ 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 priceChanges = [];
+    for(let closingPrices of closingPricesForAllStocks){
+        let priceChange = closingPrices[closingPrices.length - 1] -closingPrices[0];
+        priceChange = Math.round(priceChange * 100)/100;
+        priceChanges.push(priceChange);
+    }
+return priceChanges
 }
 
 /*
@@ -64,7 +86,14 @@ function getPriceChanges(closingPricesForAllStocks) {
     The price should be shown with exactly 2 decimal places.
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
-    // TODO
+    let descriptions = [];
+    for(let i = 0; i < closingPricesForAllStocks.length; i++){
+        let highestPrice = Math.max(...closingPricesForAllStocks[i]);
+        let stockTicker = stocks[i].toUpperCase();
+        let description = `The highest price of ${stockTicker} in the last 5 days was ${highestPrice.toFixed(2)}`;
+        descriptions.push(description);
+    }
+    return descriptions;
 }
 
 

diff --git a/3-extra/1-factorial.js b/3-extra/1-factorial.js
@@ -9,7 +9,11 @@
 */
 
 function factorial(input) {
-    // TODO
+    let result = 1;
+    for(let i = input; i > 0; i--){
+        result *= i;
+    }
+return result;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/3-extra/2-array-of-objects.js b/3-extra/2-array-of-objects.js
@@ -11,7 +11,14 @@
 */
 
 function getHighestRatedInEachGenre(books) {
-    // TODO
+    const highestRated = [];
+    for(let book of books){
+        const {title, genre, rating} = book;
+        if(!highestRated[genre] || rating > highestRated[genre].rating){
+            highestRated[genre] = {title, rating};
+        }
+    }
+    return Object.values(highestRated).map((book) => book.title);
 }
 
 

diff --git a/3-extra/3-fibonacci.js b/3-extra/3-fibonacci.js
@@ -14,7 +14,13 @@
 */
 
 function generateFibonacciSequence(n) {
-    // TODO
+
+    let sequence = [0, 1];
+    for(let i = 2; i < n; i++){
+        let nextNumber = sequence[i - 1] + sequence[i - 2];
+        sequence.push(nextNumber);
+    }
+    return sequence
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/README.md b/README.md
@@ -15,7 +15,7 @@ This is a **private** repository. Please request access from your Teachers, Budd
 
 ## Testing your work
 
-- Each of the *.js files in the `1-exercises` folder can be run from the terminal using the `node` command with the path to the file. For example, `node 1-exercises/A-undefined/exercise.js` can be run from the root of the project.
+- Each of the *.js files in the `1-exercises` folder can be run from the terminal using the `node` command with the path to the file. For example, node 1-exercises/A-undefined/exercise.js`` can be run from the root of the project.
 - To run the tests in the `2-mandatory` folder, run `npm run test` from the root of the project (after having run `npm install` once before).
 - To run the tests in the `3-extra` folder, run `npm run extra-tests` from the root of the project (after having run `npm install` once before).
 

diff --git a/package.json b/package.json
@@ -23,5 +23,8 @@
   "homepage": "https://github.com/CodeYourFuture/JavaScript-Core-1-Coursework-Week3#readme",
   "devDependencies": {
     "jest": "^26.6.3"
+  },
+  "dependencies": {
+    "git-it": "^1.2.4"
   }
 }