CodeYourFuture · Hatice06 · Jan 11, 2022 · Jan 13, 2022 · Jan 14, 2022 · ewintram
diff --git a/.vscode/launch.json b/.vscode/launch.json
@@ -0,0 +1,17 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "pwa-node",
+      "request": "launch",
+      "name": "Launch Program",
+      "skipFiles": [
+        "<node_internals>/**"
+      ],
+      "program": "${workspaceFolder}\\1-exercises\\C-while-loop-with-array\\exercise.js"
+    }
+  ]
+}
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -12,7 +12,7 @@
 // Example 1
 let a;
 console.log(a);
-
+// a should have a value for not to be undefined.a doesn't have a value.
 
 // Example 2
 function sayHello() {
@@ -21,6 +21,7 @@ function sayHello() {
 
 let hello = sayHello();
 console.log(hello);
+// sayHello function is not returning a value therefore variable hello has no value.This is why console.log returns undefined.
 
 
 // Example 3
@@ -29,8 +30,10 @@ function sayHelloToUser(user) {
 }
 
 sayHelloToUser();
+// In line 32 function call doesn't have any parameter.Therefore it returns undefined.
 
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+// Array doesn't have an item in index 3 so console.log returns undefined.
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -6,8 +6,16 @@
 */
 
 function evenNumbers(n) {
-    // TODO
-}
+    let i = 0; 
+    let count = 0;
+    while (count < n) {
+        if (i % 2 === 0){
+            console.log(i);
+            count++;   
+        }
+        i++;
+    }
+};
 
 evenNumbers(3); // should output 0,2,4
 evenNumbers(0); // should output nothing

diff --git a/1-exercises/C-while-loop-with-array/exercise.js b/1-exercises/C-while-loop-with-array/exercise.js
@@ -4,7 +4,7 @@
     Use a while loop to search through the array until you find the first birthday in July, then return that birthday from the function.
 */
 
-const BIRTHDAYS = [
+const BIRTHDAYS= [
     "January 7th",
     "February 12th",
     "April 3rd",
@@ -17,7 +17,12 @@ const BIRTHDAYS = [
 ];
 
 function findFirstJulyBDay(birthdays) {
-    // TODO
+
+    for(let i = 0; i < birthdays.length; i++){
+        if (birthdays[i].includes("July")){
+            return birthdays[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 +7,17 @@
 */
 
 function evenNumbersSum(n) {
-    // TODO
+    let i = 0;
+    let sum = 0;
+    let count = 0;
+    do { 
+        if (i % 2 === 0){
+         sum = sum + i;
+         count++;  
+        };   
+        i++
+    } while (count < n);
+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
@@ -11,4 +11,8 @@ while(i < 26) {
     console.log(String.fromCharCode(97 + i));
     i++;
 }
+
+for(i = 0; i < 26; i++){
+    console.log(String.fromCharCode(97 + 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 +27,10 @@ const AGES = [
 ];
 
 // TODO - Write for loop code here
+for(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
@@ -11,6 +11,16 @@ let tubeStations = [
     "Tottenham Court Road"
 ];
 
+for (let name of tubeStations) {
+  console.log(name);
+}
+
+
+
 
 // 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
@@ -12,10 +12,22 @@
 */
 
 function getTemperatureReport(cities) {
-    // TODO
+  let cityWithTemperature = [];
+  for (let i = 0; i < cities.length; i++) {
+    let currentCity = cities[i];
+    let currentCityTemperature = temperatureService(currentCity);
+    cityWithTemperature.push(
+      `The temperature in ${currentCity} is ${currentCityTemperature} degrees`
+    );
+  }
+  return cityWithTemperature;
 }
 
 
+
+
+
+
 /* ======= 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
@@ -10,6 +10,13 @@ function generateRandomNumber() {
 }
 
 function getRandomNumberGreaterThan50() {
+    let i = 0;
+
+    do {  
+        i = generateRandomNumber();    
+    } while (i <= 50);
+
+    return i;
     // TODO - implement using a do-while loop
 }
 

diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
@@ -5,7 +5,10 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
-    // TODO
+  let titlesMoreThan65Char = allArticleTitles.filter(
+    (title) => title.length <= 65
+  );
+  return titlesMoreThan65Char;
 }
 
 /*
@@ -14,7 +17,22 @@ function potentialHeadlines(allArticleTitles) {
     (you can assume words will always be seperated by a space)
 */
 function titleWithFewestWords(allArticleTitles) {
-    // TODO
+  // let shortestTitleLength = Infinity;
+  // return allArticleTitles.reduce((acc, title) => {
+  //     if (title.split("").length < shortestTitleLength) {
+  //       shortestTitleLength = titleLengthInWords;
+  //       return title;
+  //     } else {
+  //       return acc;
+  //     }
+  // }, "");
+  let shortestTitle = allArticleTitles[0];
+  for (let i = 1; i < allArticleTitles.length; i++) {
+    if (allArticleTitles[i].split("").length < shortestTitle.split("").length) {
+      shortestTitle = allArticleTitles[i];
+    }
+  }
+  return shortestTitle;
 }
 
 /*
@@ -23,59 +41,79 @@ function titleWithFewestWords(allArticleTitles) {
     (Hint: remember that you can also loop through the characters of a string if you need to)
 */
 function headlinesWithNumbers(allArticleTitles) {
-    // TODO
+  const titlesToReturn = [];
+  const numbers = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"];
+
+  allArticleTitles.forEach((title) => {
+    title.split("").forEach((character) => {
+      if (numbers.includes(character)) {
+        titlesToReturn.push(title);
+      }
+    });
+  });
+
+  return titlesToReturn;
 }
 
 /*
     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 totalCharacterNumber = 0;
+  for (let i = 0; i < allArticleTitles.length; i++) {
+    totalCharacterNumber =
+      totalCharacterNumber + allArticleTitles[i].split("").length;
+  }
+  return Math.round(totalCharacterNumber / allArticleTitles.length);
 }
 
-
-
 /* ======= List of Articles - DO NOT MODIFY ===== */
 const ARTICLE_TITLES = [
-    "Streaming wars drive media groups to spend more than $100bn on new content",
-    "Amazon Prime Video India country head: streaming is driving a TV revolution",
-    "Aerospace chiefs prepare for bumpy ride in recovery of long-haul flights",
-    "British companies look to muscle in on US retail investing boom",
-    "Libor to take firm step towards oblivion on New Year's Day",
-    "Audit profession unattractive to new recruits, says PwC boss",
-    "Chinese social media users blast Elon Musk over near miss in space",
-    "Companies raise over $12tn in 'blockbuster' year for global capital markets",
-    "The three questions that dominate investment",
-    "Brussels urges Chile's incoming president to endorse EU trade deal",
+  "Streaming wars drive media groups to spend more than $100bn on new content",
+  "Amazon Prime Video India country head: streaming is driving a TV revolution",
+  "Aerospace chiefs prepare for bumpy ride in recovery of long-haul flights",
+  "British companies look to muscle in on US retail investing boom",
+  "Libor to take firm step towards oblivion on New Year's Day",
+  "Audit profession unattractive to new recruits, says PwC boss",
+  "Chinese social media users blast Elon Musk over near miss in space",
+  "Companies raise over $12tn in 'blockbuster' year for global capital markets",
+  "The three questions that dominate investment",
+  "Brussels urges Chile's incoming president to endorse EU trade deal",
 ];
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 test("should only return potential headlines", () => {
-    expect(new Set(potentialHeadlines(ARTICLE_TITLES))).toEqual(new Set([
-        "British companies look to muscle in on US retail investing boom",
-        "Libor to take firm step towards oblivion on New Year's Day",
-        "Audit profession unattractive to new recruits, says PwC boss",
-        "The three questions that dominate investment"
-    ]));
+  expect(new Set(potentialHeadlines(ARTICLE_TITLES))).toEqual(
+    new Set([
+      "British companies look to muscle in on US retail investing boom",
+      "Libor to take firm step towards oblivion on New Year's Day",
+      "Audit profession unattractive to new recruits, says PwC boss",
+      "The three questions that dominate investment",
+    ])
+  );
 });
 
 test("should return an empty array for empty input", () => {
-    expect(potentialHeadlines([])).toEqual([]);
+  expect(potentialHeadlines([])).toEqual([]);
 });
 
 test("should return the title with the fewest words", () => {
-    expect(titleWithFewestWords(ARTICLE_TITLES)).toEqual("The three questions that dominate investment");
+  expect(titleWithFewestWords(ARTICLE_TITLES)).toEqual(
+    "The three questions that dominate investment"
+  );
 });
 
 test("should only return headlines containing numbers", () => {
-    expect(new Set(headlinesWithNumbers(ARTICLE_TITLES))).toEqual(new Set([
-        "Streaming wars drive media groups to spend more than $100bn on new content",
-        "Companies raise over $12tn in 'blockbuster' year for global capital markets"
-    ]));
+  expect(new Set(headlinesWithNumbers(ARTICLE_TITLES))).toEqual(
+    new Set([
+      "Streaming wars drive media groups to spend more than $100bn on new content",
+      "Companies raise over $12tn in 'blockbuster' year for global capital markets",
+    ])
+  );
 });
 
 test("should return the average number of characters in a headline", () => {
-    expect(averageNumberOfCharacters(ARTICLE_TITLES)).toEqual(65);
+  expect(averageNumberOfCharacters(ARTICLE_TITLES)).toEqual(65);
 });
diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
@@ -34,7 +34,17 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
         Functions can help with this!
 */
 function getAveragePrices(closingPricesForAllStocks) {
-    // TODO
+
+    let salesAveragePrices = []
+    for(let i = 0; i <closingPricesForAllStocks.length; i++){
+        let eachCompanySalesTotal = 0;
+        for(let j = 0; j < closingPricesForAllStocks[i].length; j++){
+            eachCompanySalesTotal = eachCompanySalesTotal + closingPricesForAllStocks[i][j];
+        }
+        //salesAveragePrices.push((eachCompanySalesTotal / 5).toFixed(2));
+        salesAveragePrices[i] = Number((eachCompanySalesTotal / 5).toFixed(2));
+    }
+    return salesAveragePrices;
 }
 
 /*
@@ -48,7 +58,14 @@ 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 priceChangesAllCompanies = [];
+    for( const prices of closingPricesForAllStocks ){
+        let firstSalePrice = prices[0];
+        let lastSalePrice = prices[prices.length-1]
+        let priceChange = lastSalePrice - firstSalePrice;
+        priceChangesAllCompanies.push(Number(priceChange.toFixed(2)));
+    }
+        return priceChangesAllCompanies;
 }
 
 /*
@@ -64,7 +81,14 @@ function getPriceChanges(closingPricesForAllStocks) {
     The price should be shown with exactly 2 decimal places.
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
-    // TODO
+    let highestPriceByCompany = [];
+    for( let i = 0; i < closingPricesForAllStocks.length; i++ ){
+         let highestPrice = Math.max(...closingPricesForAllStocks[i]).toFixed(2);    
+         highestPriceByCompany.push(
+           `The highest price of ${stocks[i].toUpperCase()} in the last 5 days was ${highestPrice}`
+         );     
+    }
+    return highestPriceByCompany;    
 }
 
 

diff --git a/3-extra/1-factorial.js b/3-extra/1-factorial.js
@@ -9,8 +9,19 @@
 */
 
 function factorial(input) {
-    // TODO
+    let total = 1;
+      if (input === 0 || input === 1)
+    return 1;
+
+    for (let i = 1; i <= input; i++){
+    total = total * i
+    }
+  return total;
 }
+
+
+
+
 
 /* ======= TESTS - DO NOT MODIFY ===== */