CodeYourFuture · Nishka-Kisten · Jul 15, 2022 · Jul 15, 2022 · dschouw-CYF · Jul 25, 2022
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -12,11 +12,12 @@
 // Example 1
 let a;
 console.log(a);
-
+//  The variable a has not been declared.
 
 // Example 2
 function sayHello() {
     let message = "Hello";
+//    no 'return message' in this function.
 }
 
 let hello = sayHello();
@@ -26,6 +27,7 @@ console.log(hello);
 // Example 3
 function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
+    // user has no value/ not defined.
 }
 
 sayHelloToUser();
@@ -34,3 +36,4 @@ sayHelloToUser();
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+// arr[3] calls for the 4th number in the array, there are only 3 numbers in this array.
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -5,10 +5,16 @@
     The list of numbers should start with 0. n is being passed in as a parameter.
 */
 
-function evenNumbers(n) {
-    // TODO
+function evenNumbers(n) {  
+    let i = 0;
+    let array =[];
+  while (i < n ) {
+    array.push(i * 2);
+      i++;
+  }
+  return array.join();
 }
 
-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
+console.log(evenNumbers(3)); // should output 0,2,4
+console.log(evenNumbers(0)); // should output nothing
+console.log(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
@@ -17,7 +17,12 @@ 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
@@ -7,7 +7,13 @@
 */
 
 function evenNumbersSum(n) {
-    // TODO
+    let i = 0;
+    let array =[];
+    do{ 
+  array.push(i * 2 );
+    i++;
+   } while(i < n);
+   return array.reduce((a,b) => a + b, 0);
 }
 
 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 +6,9 @@
 
 
 // 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
@@ -27,6 +27,9 @@ const AGES = [
 ];
 
 // TODO - Write for loop code here
+for(let i = 0; i < 5; 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
@@ -1,5 +1,5 @@
 /*
-    A for-of loop is a easy and way of looping through the elements of an array, string or any other "iterable object" (think sequence of elements).    
+    A for-of loop is an easy way of looping through the elements of an array, string or any other "iterable object" (think sequence of elements).    
 */
 
 // TODO Use a for-of loop to output each of the tube stations below.
@@ -11,6 +11,14 @@ let tubeStations = [
     "Tottenham Court Road"
 ];
 
+for (let value of tubeStations) {
+console.log(value);
+}
+
+
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
-let str = "codeyourfuture";
+let str = "codeyourfuture"; 
+for(let val of str) {
+    console.log(val.toUpperCase());
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -2,17 +2,21 @@
     Imagine we're making a weather app!
 
     We have a list of cities that the user wants to track.
-    We also already have a temperatureService function which will take a city as a parameter and return a temparature.
+    We also already have a temperatureService function which will take a city as a parameter and return a temperature.
 
     Implement the function below:
         - take the array of cities as a parameter
         - return an array of strings, which is a statement about the temperature of each city.
             For example, "The temperature in London is 10 degrees"
         - Hint: you can call the temperatureService function from your function
 */
-
-function getTemperatureReport(cities) {
-    // TODO
+    function getTemperatureReport(usersCities ){
+        let result = [];
+       for(let i = 0; i < usersCities.length; i++ ){
+       let message= "The temperature in " + usersCities[i] + " is " + temperatureService(usersCities[i]) + " degrees";
+    //    let message = "The temperature in " + usersCity[i] + " is " +  temperatureService[i] + " degrees";
+       result.push(message);
+    } return result;
 }
 
 

diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -11,6 +11,12 @@ function generateRandomNumber() {
 
 function getRandomNumberGreaterThan50() {
     // TODO - implement using a do-while loop
+    let i ;
+    do{
+       i = generateRandomNumber();
+
+    }while(i <= 50)
+    return i ;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
@@ -5,33 +5,60 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
-    // TODO
+    var result = allArticleTitles.filter((n) => n.length <= 65)
+    if (result) {
+        return result;
+    }
 }
+
+
 
 /*
     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)
-*/
+    (you can assume words will always be separated by a space)
+*/ 
 function titleWithFewestWords(allArticleTitles) {
-    // TODO
-}
+     var fewestWords = allArticleTitles[0];
+    for (let i = 0; i < allArticleTitles.length; i++) {
+        var element = allArticleTitles[i];
+        if (fewestWords.length > element.length) {
+            fewestWords = element;
+        }
+    }
+    return fewestWords;
+    };
+
 
 /*
-    The editor of the FT has realised that headlines which have numbers in them get more clicks!
+    The editor of the FT has realized that headlines which have numbers in them get more clicks!
     Implement the function below to return a new array containing all the headlines which contain a number.
     (Hint: remember that you can also loop through the characters of a string if you need to)
 */
 function headlinesWithNumbers(allArticleTitles) {
-    // TODO
+    // if(typeof allArticleTitles === "number") {
+    //     return typeof allArticleTitles === "number";
+    // }
+    titleWithNum = [];
+    var hasNumber = /\d/;
+     for(let element of allArticleTitles) {
+       if (hasNumber.test(element)){
+       titleWithNum.push(element);}
+     } return titleWithNum;
 }
 
+
 /*
     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 total = 0;
+    let sum;
+    for(let element of allArticleTitles){
+       total= total + element.length;
+       sum =  Math.round(total/allArticleTitles.length);
+    }return sum;
 }
 
 

diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
@@ -34,7 +34,14 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
         Functions can help with this!
 */
 function getAveragePrices(closingPricesForAllStocks) {
-    // TODO
+    let total= [];
+    let tot= 0;
+    let sum = 0;
+    for(let element of closingPricesForAllStocks){
+      sum = element.reduce((a, b) => a + b);
+      tot = sum / 5;
+     total.push(Math.round(tot * 100) / 100);
+    } return total
 }
 
 /*
@@ -48,7 +55,18 @@ 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 total = [];
+    let priceChange = 0;
+     for (let prices of closingPricesForAllStocks) {
+       let last = prices.slice(-1);
+       // console.log(last);
+       // console.log(prices[0]);
+      priceChange = last - prices[0];
+      //  total.push(priceChange.toFixed(2));
+      total.push( Math.round(priceChange * 100) / 100);
+
+     // console.log(priceChange);
+     } return total;
 }
 
 /*
@@ -64,7 +82,23 @@ function getPriceChanges(closingPricesForAllStocks) {
     The price should be shown with exactly 2 decimal places.
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
-    // TODO
+ let newStocks = [];
+let total = [];
+let message = "";
+let last;
+for (let stock of closingPricesForAllStocks) {
+    stock.sort((a, b) => b - a);
+//    last = stock[0];
+//    total.push( Math.round(last * 100) / 100);
+   total.push(stock);
+}
+for (let i = 0; i < stocks.length; i++) {
+    let roundedUp =(total[i][0]).toFixed(2);
+    // let roundedUp =  Math.round((total[i][0]) * 100) / 100;
+    message = "The highest price of " + stocks[i].toUpperCase() + " in the last 5 days was " + roundedUp;
+    newStocks.push(message);
+}
+return newStocks;
 }