CodeYourFuture · Sharifa1 · Sep 27, 2022 · Sep 27, 2022 · Sep 27, 2022 · Sep 28, 2022
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 is not initialized
 
 // Example 2
 function sayHello() {
@@ -21,16 +21,17 @@ function sayHello() {
 
 let hello = sayHello();
 console.log(hello);
-
+// The function does not have a return value
 
 // Example 3
 function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
 
 sayHelloToUser();
-
+// The user in the function is not defined
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+// There is no index 3 in arr variable
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -7,6 +7,13 @@
 
 function evenNumbers(n) {
     // TODO
+    let str = "";
+    let i = 0;
+    while (i < n) {
+        str = str + i * 2 + ",";
+        i++;
+    }
+    console.log(str.slice(0,str.length-1));
 }
 
 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
@@ -18,6 +18,14 @@ 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
@@ -8,8 +8,16 @@
 
 function evenNumbersSum(n) {
     // TODO
+    let sum= 0;
+    let i = 0;
+    do {
+        sum += i * 2;
+         i = i + 1;
+    } while (i < n);
+    return sum;
 }
 
 console.log(evenNumbersSum(3)); // should output 6
 console.log(evenNumbersSum(0)); // should output 0
-console.log(evenNumbersSum(10)); // should output 90
+console.log(evenNumbersSum(10)); // should output 90
+
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) {
-    console.log(String.fromCharCode(97 + i));
-    i++;
+for (let 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
@@ -27,7 +27,10 @@ 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
@@ -13,4 +13,7 @@ let tubeStations = [
 
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
-let str = "codeyourfuture";
+// let str = "codeyourfuture";
+for (const station of tubeStations) {
+    console.log(station);
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -13,6 +13,11 @@
 
 function getTemperatureReport(cities) {
     // TODO
+    let arr = [];
+    for (let i = 0; i < cities.length; i++) {
+        arr.push("The temperature in " + cities[i] + " is " +temperatureService(cities[i]) +" degrees");
+    }
+    return arr;
 }
 
 

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

diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
@@ -5,7 +5,14 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
-    // TODO
+  let arr = [];
+  for (let i = 0; i < allArticleTitles.length; i++) {
+    if (allArticleTitles[i].length <= 65) {
+      arr.push(allArticleTitles[i]);
+    }
+  }
+  return arr;
+  // TODO
 }
 
 /*
@@ -14,68 +21,106 @@ function potentialHeadlines(allArticleTitles) {
     (you can assume words will always be seperated by a space)
 */
 function titleWithFewestWords(allArticleTitles) {
-    // TODO
+  let strLength = [];
+  for (let i = 0; i < allArticleTitles.length; i++) {
+    let strArr = allArticleTitles[i].split(" ");
+    strLength.push(strArr.length);
+  }
+  let minLength = Math.min(...strLength);
+  let minimumIndex = strLength.indexOf(minLength);
+  return allArticleTitles[minimumIndex];
+
+  // TODO
 }
 
 /*
     The editor of the FT has realised 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 isNum(c) {
+  if (typeof c !== "string") {
+    return true;
+  }
+  if (c.trim() === "") {
+    return false;
+  }
+  return !isNaN(c);
+}
 function headlinesWithNumbers(allArticleTitles) {
-    // TODO
+  let arrWithNum = [];
+  for (let i = 0; i < allArticleTitles.length; i++) {
+    let singleArt = allArticleTitles[i];
+    for (let j = 0; j < singleArt.length; j++) {
+      if (isNum(singleArt[j])) {
+        arrWithNum.push(singleArt);
+        break;
+      }
+    }
+  }
+  return arrWithNum;
+  // TODO
 }
 
 /*
     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 sum = 0;
+  for (let i = 0; i < allArticleTitles.length; i++) {
+    sum += allArticleTitles[i].length;
+  }
+  return Math.round(sum / allArticleTitles.length);
+  // TODO
 }
 
-
-
 /* ======= 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
@@ -11,11 +11,11 @@
 const STOCKS = ["aapl", "msft", "amzn", "googl", "tsla"];
 
 const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
-    [179.19, 180.33, 176.28, 175.64, 172.99], // AAPL
-    [340.69, 342.45, 334.69, 333.20, 327.29], // MSFT
-    [3384.44, 3393.39, 3421.37, 3420.74, 3408.34], // AMZN
-    [2951.88, 2958.13, 2938.33, 2928.30, 2869.45], // GOOGL
-    [1101.30, 1093.94, 1067.00, 1008.87, 938.53] // TSLA
+  [179.19, 180.33, 176.28, 175.64, 172.99], // AAPL
+  [340.69, 342.45, 334.69, 333.2, 327.29], // MSFT
+  [3384.44, 3393.39, 3421.37, 3420.74, 3408.34], // AMZN
+  [2951.88, 2958.13, 2938.33, 2928.3, 2869.45], // GOOGL
+  [1101.3, 1093.94, 1067.0, 1008.87, 938.53], // TSLA
 ];
 
 /*
@@ -34,7 +34,17 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
         Functions can help with this!
 */
 function getAveragePrices(closingPricesForAllStocks) {
-    // TODO
+  let avePrice = [];
+  for (let i = 0; i < closingPricesForAllStocks.length; i++) {
+    let stock = closingPricesForAllStocks[i];
+    let total = 0;
+    for (let j = 0; j < stock.length; j++) {
+      total += stock[j];
+    }
+    avePrice.push(parseFloat((total / stock.length).toFixed(2)));
+  }
+  return avePrice;
+  // TODO
 }
 
 /*
@@ -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 changeInPrice = [];
+  for (let i = 0; i < closingPricesForAllStocks.length; i++) {
+    let stock = closingPricesForAllStocks[i];
+    let change = stock[stock.length - 1] - stock[0];
+    changeInPrice.push(parseFloat(change.toFixed(2)));
+  }
+  return changeInPrice;
+  // TODO
 }
 
 /*
@@ -64,31 +81,42 @@ function getPriceChanges(closingPricesForAllStocks) {
     The price should be shown with exactly 2 decimal places.
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
-    // TODO
+  let report = [];
+  let highestPrice = [];
+  for (let i = 0; i < closingPricesForAllStocks.length; i++) {
+    let high = Math.max(...closingPricesForAllStocks[i]);
+    highestPrice.push(high);
+  }
+  for (let j = 0; j < stocks.length; j++) {
+    report.push(
+      `The highest price of ${stocks[j].toUpperCase()} in the last 5 days was ${highestPrice[j].toFixed(2)}`
+    );
+  }
+  return report;
+  // TODO
 }
 
-
 /* ======= TESTS - DO NOT MODIFY ===== */
 test("should return the average price for each stock", () => {
-    expect(getAveragePrices(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS)).toEqual(
-        [176.89, 335.66, 3405.66, 2929.22, 1041.93]
-    );
+  expect(getAveragePrices(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS)).toEqual([
+    176.89, 335.66, 3405.66, 2929.22, 1041.93,
+  ]);
 });
 
 test("should return the price change for each stock", () => {
-    expect(getPriceChanges(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS)).toEqual(
-        [-6.2, -13.4, 23.9, -82.43, -162.77]
-    );
+  expect(getPriceChanges(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS)).toEqual([
+    -6.2, -13.4, 23.9, -82.43, -162.77,
+  ]);
 });
 
 test("should return a description of the highest price for each stock", () => {
-    expect(highestPriceDescriptions(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS, STOCKS)).toEqual(
-        [
-            "The highest price of AAPL in the last 5 days was 180.33",
-            "The highest price of MSFT in the last 5 days was 342.45",
-            "The highest price of AMZN in the last 5 days was 3421.37",
-            "The highest price of GOOGL in the last 5 days was 2958.13",
-            "The highest price of TSLA in the last 5 days was 1101.30"
-        ]
-    );
+  expect(
+    highestPriceDescriptions(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS, STOCKS)
+  ).toEqual([
+    "The highest price of AAPL in the last 5 days was 180.33",
+    "The highest price of MSFT in the last 5 days was 342.45",
+    "The highest price of AMZN in the last 5 days was 3421.37",
+    "The highest price of GOOGL in the last 5 days was 2958.13",
+    "The highest price of TSLA in the last 5 days was 1101.30",
+  ]);
 });