CodeYourFuture · RobCso · Aug 18, 2022 · Aug 18, 2022 · Aug 19, 2022 · Aug 25, 2022
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -11,12 +11,12 @@
 
 // Example 1
 let a;
-console.log(a);
+console.log(a); // Variable a is declared but no value is assigned to it
 
 
 // Example 2
 function sayHello() {
-    let message = "Hello";
+    let message = "Hello";  // there is no return statemnet in the function sayHello(), the variable message only exists inside of the function,but nothing is returned
 }
 
 let hello = sayHello();
@@ -28,9 +28,8 @@ function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
 
-sayHelloToUser();
-
+sayHelloToUser(); // the parameter is not defined in the parenthesis so it returns undefined
 
 // Example 4
 let arr = [1,2,3];
-console.log(arr[3]);
+console.log(arr[3]); // the index 3 in the array call points to the 4th placed element inside the array, as we count the elements from index 0, index 3 is undefined
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
+    // if (!n) return
+    let i = 0;
+    let arr = [];
+    while (i < n * 2) {        
+        if (i % 2 === 0) {
+            arr.push(i);                        
+        } 
+        i++;       
+    }
+    console.log(arr);
 }
 
 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(1);
diff --git a/1-exercises/C-while-loop-with-array/exercise.js b/1-exercises/C-while-loop-with-array/exercise.js
@@ -17,7 +17,16 @@ const BIRTHDAYS = [
 ];
 
 function findFirstJulyBDay(birthdays) {
-    // TODO
+     let i = 0;
+     let birthday;
+     while (i < birthdays.length) {
+        if (birthdays[i].includes("July")) {
+             birthday = birthdays[i];
+             i++
+        }
+        i++;
+     }
+    return birthday
 }
 
 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 +7,14 @@
 */
 
 function evenNumbersSum(n) {
-    // TODO
+    let result = 0;
+    let i = 0;
+    do { if (i % 2 === 0)
+        result += i;
+        i++;
+    }
+    while (i < n * 2)
+    return result;
 }
 
 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 +6,14 @@
 
 
 // Change the below code to use a for loop instead of a while loop.
-let i = 0;
-while(i < 26) {
+// let i = 0;
+// while(i < 26) {
+//     console.log(String.fromCharCode(97 + i));
+//     i++;
+// }
+
+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
@@ -26,6 +26,10 @@ const AGES = [
     49
 ];
 
+for (let i = 0; i < 5; i++) {
+    console.log(`${WRITERS[i]} is ${AGES[i]} years old`)
+}
+
 // TODO - Write for loop code here
 
 /*

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 (const element of tubeStations) {
+    console.log(element);
+}
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+
+for (const element of str) {
+    console.log(element.toUpperCase());
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -12,10 +12,13 @@
 */
 
 function getTemperatureReport(cities) {
-    // TODO
+    let arr = [];
+    for (const element of cities) {
+        if (temperatureService(element)) {
+           arr.push(`The temperature in ${element} is ${temperatureService(element)} degrees`);
+        } 
+    } return arr;
 }
-
-
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 function temperatureService(city) {

diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -9,8 +9,22 @@ function generateRandomNumber() {
     return Math.round(Math.random() * 100);
 }
 
+// function getRandomNumberGreaterThan50() {
+//     return generateRandomNumber() + 50;
+// }
+
 function getRandomNumberGreaterThan50() {
-    // TODO - implement using a do-while loop
+    let i = 0;
+    let arr = [];
+    do {
+        arr.push(generateRandomNumber());        
+        if (arr[i] > 50) {
+            arr = arr[i];
+        }
+        i++;
+    }
+    while (i <= arr.length);
+    return arr
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
@@ -5,7 +5,13 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
-    // TODO
+    let arr = [];
+    for (const element of allArticleTitles) {
+        if (element.length <= 65) {
+            arr.push(element);
+        }
+    }return arr;
+
 }
 
 /*
@@ -14,7 +20,15 @@ function potentialHeadlines(allArticleTitles) {
     (you can assume words will always be seperated by a space)
 */
 function titleWithFewestWords(allArticleTitles) {
-    // TODO
+     let arrLength = [];
+     let smallestNumValue;
+     let index;
+    for (const element of allArticleTitles) {      //my first step was to itirate through the array and create an other array with indexes of lenght of each string
+         arrLength.push(element.split(" ").length);        
+    }
+    smallestNumValue = Math.min(...arrLength); //once i had the array of indexes of lenght I went on to find the position of the smallest index in the array in 2 steps, first finding the value of the smallest number 
+    index = arrLength.indexOf(smallestNumValue)//this is the second step of finding the position of the smallest index in an array, this steps finds the position of the smallest number that we identified in the previous step
+    return allArticleTitles[index]; //finally i return the position of the smallest number of the original array
 }
 
 /*
@@ -23,19 +37,35 @@ 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 array = []
+    for (const element of allArticleTitles){
+        if ( /\d/.test(element)) {
+            array.push(element);
+        }
+    } return array;
 }
 
 /*
     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 arrNumOfCharacters = [];
+    let total = 0;
+    let average = 0;
+    for (const element of allArticleTitles) {
+        arrNumOfCharacters.push(element.trim().length);
+    }
+    for (const element of arrNumOfCharacters) {
+         total = total + element;
+    }
+     average = total / arrNumOfCharacters.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",

diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-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 total = 0;
+    let average = 0;
+    arrayOfAverages = [];
+    for (const subArray of closingPricesForAllStocks) {
+        for (const element of subArray) {
+            total = total + element;
+        }
+        average = total / subArray.length;
+        total = 0;        
+        arrayOfAverages.push(Math.round(average *100)/100);
+    }
+    return arrayOfAverages;
 }
 
 /*
@@ -48,7 +59,15 @@ 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 priceDifference = 0;
+    let arrayOfChanges = [];
+    for (const subArray of closingPricesForAllStocks) {
+
+        priceDifference = Math.round((subArray[subArray.length -1] - subArray[0]) * 100) /100;
+        arrayOfChanges.push(priceDifference);
+    }
+
+    return arrayOfChanges;
 }
 
 /*
@@ -64,7 +83,17 @@ function getPriceChanges(closingPricesForAllStocks) {
     The price should be shown with exactly 2 decimal places.
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
-    // TODO
+    let highestPriceEach = 0;
+    let arrayOfPrices = [];
+    let i = 0;
+    for (const subArray of closingPricesForAllStocks) {
+
+            highestPriceEach = Math.max(...subArray).toFixed(2);
+            arrayOfPrices.push(`The highest price of ${stocks[i].toUpperCase()} in the last 5 days was ${highestPriceEach}`);
+            i++
+
+    }
+    return arrayOfPrices;
 }
 
 

diff --git a/3-extra/1-factorial.js b/3-extra/1-factorial.js
@@ -9,7 +9,12 @@
 */
 
 function factorial(input) {
-    // TODO
+    let sum = 1;
+    for (let i = 1;  i <= input; i++) {
+        sum = i * sum;
+
+    }
+    return sum;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/3-extra/2-array-of-objects.js b/3-extra/2-array-of-objects.js
@@ -12,8 +12,29 @@
 
 function getHighestRatedInEachGenre(books) {
     // TODO
+    const children = [];
+    const nonFiction = [];
+    const cooking = [];
+    const highestRatedTitles = [];
+    for (let i = 0; i < books.length; i++) {
+        if (books[i].genre === "children") {
+            children.push(books[i]);
+        } else if (books[i].genre === "non-fiction") {
+            nonFiction.push(books[i]);
+        } else  {
+            cooking.push(books[i]);
+        }
+    }
+     children.sort((a, b) => b.rating - a.rating);
+     nonFiction.sort((a, b) => b.rating - a.rating);
+     cooking.sort((a, b) => b.rating - a.rating); 
+     highestRatedTitles.push(children[0].title, nonFiction[0].title, cooking[0].title) 
+     return highestRatedTitles;
 }
 
+// let numbers = [2, 5, 2, 5, 6, 8, 86,34, 0, 22];
+// console.log(numbers.sort((a, b) => b - a))
+
 
 /* ======= Book data - DO NOT MODIFY ===== */
 const BOOKS = [
@@ -69,6 +90,7 @@ const BOOKS = [
     },
 ]
 
+// console.log(getHighestRatedInEachGenre(BOOKS))
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 test("should return the highest rated book in each genre", () => {

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

diff --git a/testFolder/test 12.js b/testFolder/test 12.js
@@ -0,0 +1,15 @@
+function logicalCalc(array, op){
+  //your code here
+  let logic 
+//   for (let i = 0; i < array.length; i++) {
+    if (op === "AND") {
+    logic = array.reduce((a, b) => a && b);
+   } else if (op === "OR") {
+    logic = array.reduce((a, b) => a || b);
+   } else if ( op === "XOR") {
+    logic = array.reduce((a, b) => a != b);
+   }
+//   }
+  return logic
+}
+
diff --git a/testFolder/test.js b/testFolder/test.js
@@ -0,0 +1,13 @@
+function evenNumbers(n) {
+    let i = 0;
+    let arr = [];
+    while (i < n * 2) {        
+        if (i % 2 === 0) {
+            arr.push(i);                        
+        } 
+        i++;       
+    }
+    console.log(arr);
+}
+
+evenNumbers(10);
-Original file line number
+Diff line change
@@ Expand Up / @@ -26,6 +26,10 @@ const AGES = [ @@
     ];
+    for (let i = 0; i < 5; i++) {
+        console.log(`${WRITERS[i]} is ${AGES[i]} years old`)
+    }
     // TODO - Write for loop code here
     /*
@@ Expand Down @@