CodeYourFuture · OlenaReukova · Dec 17, 2022 · Dec 17, 2022 · Dec 17, 2022 · Dec 18, 2022
diff --git a/.DS_Store b/.DS_Store
diff --git a/1-exercises/.DS_Store b/1-exercises/.DS_Store
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -10,27 +10,25 @@
 */
 
 // Example 1
-let a;
+let a = 2; //value was not declare
 console.log(a);
 
-
 // Example 2
 function sayHello() {
-    let message = "Hello";
+  let message = "Hello";
+  return message; //we need return value to message
 }
 
 let hello = sayHello();
-console.log(hello);
-
+console.log(sayHello());
 
 // Example 3
 function sayHelloToUser(user) {
-    console.log(`Hello ${user}`);
+  console.log(`Hello ${user}`);
 }
 
-sayHelloToUser();
-
+sayHelloToUser("MAX"); //input data was not provided -we should provide it
 
 // Example 4
-let arr = [1,2,3];
-console.log(arr[3]);
+let arr = [1, 2, 3];
+console.log(arr[2]); //mistake withbindex, last value from array is under 2 index
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -6,7 +6,14 @@
 */
 
 function evenNumbers(n) {
-    // TODO
+  // TODO
+  let result = [];
+  let i = 0;
+  while (i < n) {
+    result.push(i * 2);
+    i++;
+  }
+  console.log(result.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
@@ -18,6 +18,13 @@ 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
@@ -8,6 +8,13 @@
 
 function evenNumbersSum(n) {
     // TODO
+    let sum = 0;
+    let i = 0;
+    do {
+        sum += (i * 2);
+        i++;
+    } while (i < 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
@@ -6,9 +6,7 @@
 
 
 // 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
@@ -27,7 +27,9 @@ 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
@@ -4,13 +4,18 @@
 
 // TODO Use a for-of loop to output each of the tube stations below.
 let tubeStations = [
-    "Aldgate",
-    "Baker Street",
-    "Picadilly Circus",
-    "Oxford Street",
-    "Tottenham Court Road"
+  "Aldgate",
+  "Baker Street",
+  "Picadilly Circus",
+  "Oxford Street",
+  "Tottenham Court Road",
 ];
 
-
+for (let station of tubeStations) {
+  console.log(station);
+}
 // 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.toLocaleUpperCase());
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -12,52 +12,63 @@
 */
 
 function getTemperatureReport(cities) {
-    // TODO
+  // TODO
+  let report = [];
+  for (let city of cities) {
+    let temperature = temperatureService(city);
+    report.push(`The temperature in ${city} is ${temperature} degrees`);
+  }
+  return report;
+}
+
+/* one more solution
+function getTemperatureReport(cities) {
+    let result = [];
+    for (let i = 0; i < cities.length; i++){
+        let eachCity = cities[i];
+        let temperature = temperatureService(eachCity);
+        result.push(`The temperature in ${city} is ${temperature} degrees`);
+    }
+    return result;
 }
 
 
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 function temperatureService(city) {
-    let temparatureMap  = new Map();
-
-    temparatureMap.set('London', 10);
-    temparatureMap.set('Paris', 12);
-    temparatureMap.set('Barcelona', 17);
-    temparatureMap.set('Dubai', 27);
-    temparatureMap.set('Mumbai', 29);
-    temparatureMap.set('São Paulo', 23);
-    temparatureMap.set('Lagos', 33);
-    
-    return temparatureMap.get(city);
+  let temparatureMap = new Map();
+
+  temparatureMap.set("London", 10);
+  temparatureMap.set("Paris", 12);
+  temparatureMap.set("Barcelona", 17);
+  temparatureMap.set("Dubai", 27);
+  temparatureMap.set("Mumbai", 29);
+  temparatureMap.set("São Paulo", 23);
+  temparatureMap.set("Lagos", 33);
+
+  return temparatureMap.get(city);
 }
 
 test("should return a temperature report for the user's cities", () => {
-    let usersCities = [
-        "London",
-        "Paris",
-        "São Paulo"
-    ]
-
-    expect(getTemperatureReport(usersCities)).toEqual([
-        "The temperature in London is 10 degrees",
-        "The temperature in Paris is 12 degrees",
-        "The temperature in São Paulo is 23 degrees"
-    ]);
+  let usersCities = ["London", "Paris", "São Paulo"];
+
+  expect(getTemperatureReport(usersCities)).toEqual([
+    "The temperature in London is 10 degrees",
+    "The temperature in Paris is 12 degrees",
+    "The temperature in São Paulo is 23 degrees",
+  ]);
 });
 
 test("should return a temperature report for the user's cities (alternate input)", () => {
-    let usersCities = [
-        "Barcelona",
-        "Dubai"
-    ]
-
-    expect(getTemperatureReport(usersCities)).toEqual([
-        "The temperature in Barcelona is 17 degrees",
-        "The temperature in Dubai is 27 degrees"
-    ]);
+  let usersCities = ["Barcelona", "Dubai"];
+
+  expect(getTemperatureReport(usersCities)).toEqual([
+    "The temperature in Barcelona is 17 degrees",
+    "The temperature in Dubai is 27 degrees",
+  ]);
 });
 
 test("should return an empty array if the user hasn't selected any cities", () => {
-    expect(getTemperatureReport([])).toEqual([]);
-});
+  expect(getTemperatureReport([])).toEqual([]);
+});
diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -5,20 +5,25 @@
 
 // This function shouldn't be changed
 function generateRandomNumber() {
-    console.log("Generating number...");
-    return Math.round(Math.random() * 100);
+  console.log("Generating number...");
+  return Math.round(Math.random() * 100);
 }
 
 function getRandomNumberGreaterThan50() {
-    // TODO - implement using a do-while loop
+  let generateNumber;
+  do {
+    generateNumber = generateRandomNumber();
+  } while (generateNumber <= 50);
+  return generateNumber;
 }
+// TODO - implement using a do-while loop
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 test("Returned value should always be greater than 50", () => {
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
 });
diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
@@ -5,16 +5,39 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
+    let headlines = [];
+    for (i = 0; i < allArticleTitles.length; i++){
+        if (allArticleTitles[i].length <= 65) {
+            headlines.push(allArticleTitles[i]);
+        }
+    }
+        return headlines;
     // TODO
 }
 
+function numberOfWords(title) {
+    //return the number of words in the title
+    //look at each title
+    //find out number of words
+    return title.split(" ").length;
+}
 /*
     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) {
+    let  fewestWordsSoFar;
+    let titleWithFewestWords;
     // TODO
+    for (let title of allArticleTitles) {
+        let numWords = title.split(' ').length;
+        if (fewestWordsSoFar === undefined || numWords < fewestWordsSoFar) {
+            fewestWordsSoFar = numWords;
+            titleWithFewestWords = title;
+        }
+    }
+    return titleWithFewestWords;
 }
 
 /*
@@ -24,6 +47,22 @@ function titleWithFewestWords(allArticleTitles) {
 */
 function headlinesWithNumbers(allArticleTitles) {
     // TODO
+    let articlesWithNumbers = [];
+    for (let title of allArticleTitles) {
+        if (doesTitleContainANumber(title)) {
+            articlesWithNumbers.push(title);
+        }
+    }
+    return articlesWithNumbers;
+}
+
+function doesTitleContainANumber(title) {
+    for (let character of title) {
+        if (character >= '0' && character <= '9') {
+            return true;
+        }
+    }
+    return false;
 }
 
 /*
@@ -32,6 +71,11 @@ function headlinesWithNumbers(allArticleTitles) {
 */
 function averageNumberOfCharacters(allArticleTitles) {
     // TODO
+    let totalCharacters = 0;
+    for (let title of allArticleTitles) {
+        totalCharacters += title.length;
+    }
+    return Math.round(totalCharacters / allArticleTitles.length);
 }