CodeYourFuture · SalihaPopal · Mar 5, 2023 · Mar 6, 2023 · Mar 16, 2023 · moneyinthesky
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -10,27 +10,33 @@
 */
 
 // Example 1
-let a;
+//let a;  //.  a does not have value
+let a = "Hi"
 console.log(a);
 
 
 // Example 2
 function sayHello() {
-    let message = "Hello";
-}
+    return "Hello";
+}  ////. this function have to return to something. 
 
-let hello = sayHello();
-console.log(hello);
+let result = sayHello();
+console.log(result);  //// should assign a variable
 
 
 // Example 3
 function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
 
-sayHelloToUser();
+sayHelloToUser();  // hello is undefined and recalled with no parameter.
+sayHello(Maria);   // should recall a value of a variable 
 
 
 // Example 4
 let arr = [1,2,3];
-console.log(arr[3]);
+arr[3] = 4;
+
+console.log(arr[3]);// the length of array is 2 because it starts from 0. 
+//By adding arr[3] = 4; console.log(arr[3]) === true
+
diff --git a/1-exercises/B-array-literals/exercise.js b/1-exercises/B-array-literals/exercise.js
@@ -4,8 +4,11 @@
   Declare some variables assigned to arrays of values
 */
 
-let numbers = []; // add numbers from 1 to 10 into this array
-let mentors; // Create an array with the names of the mentors: Daniel, Irina and Rares
+let numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; // add numbers from 1 to 10 into this array
+
+let mentors = ["Daniel", "Irina", "Rares"];
+// Create an array with the names of the mentors: Daniel, Irina and Rares
+
 
 /* 
   DO NOT EDIT BELOW THIS LINE

diff --git a/1-exercises/C-array-get-set/exercise.js b/1-exercises/C-array-get-set/exercise.js
@@ -5,11 +5,11 @@
 */
 
 function first(arr) {
-  return; // complete this statement
+  return arr[0];
 }
 
 function last(arr) {
-  return; // complete this statement
+    return arr[arr.length-1]; 
 }
 
 /* 

diff --git a/1-exercises/C-array-get-set/exercises2.js b/1-exercises/C-array-get-set/exercises2.js
@@ -7,6 +7,13 @@
 */
 
 let numbers = [1, 2, 3]; // Don't change this array literal declaration
+numbers;
+numbers.length;
+//numbers[3] = 4;  or
+numbers[numbers.length] = 4;
+numbers[0] = 1;
+
+console.log(numbers.length);
 
 /* 
   DO NOT EDIT BELOW THIS LINE

diff --git a/1-exercises/D-for-loop/exercise.js b/1-exercises/D-for-loop/exercise.js
@@ -28,6 +28,13 @@ 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/E-while-loop-with-array/exercise.js b/1-exercises/E-while-loop-with-array/exercise.js
@@ -16,8 +16,15 @@ const BIRTHDAYS = [
     "November 15th"
 ];
 
-function findFirstJulyBDay(birthdays) {
-    // TODO
+function findFirstJulyBDay(BIRTHDAYS) {
+    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/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -2,7 +2,7 @@
     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
@@ -11,25 +11,29 @@
         - Hint: you can call the temperatureService function from your function
 */
 
-function getTemperatureReport(cities) {
-    // TODO
-}
-
+    function getTemperatureReport(cities){
+        const statement = [];
+        for(const city of cities){
+        const temperature = temperatureService(city)
+        statement.push(`The temperature in ${city} is ${temperature} degrees`)
+        }
+        return statement;
+    }
 
 /* ======= 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);
+    let temperatureMap  = new Map();
+
+    temperatureMap.set('London', 10);
+    temperatureMap.set('Paris', 12);
+    temperatureMap.set('Barcelona', 17);
+    temperatureMap.set('Dubai', 27);
+    temperatureMap.set('Mumbai', 29);
+    temperatureMap.set('São Paulo', 23);
+    temperatureMap.set('Lagos', 33);
 
-    return temparatureMap.get(city);
+    return temperatureMap.get(city);
 }
 
 test("should return a temperature report for the user's cities", () => {

diff --git a/2-mandatory/2-financial-times.js b/2-mandatory/2-financial-times.js
@@ -4,36 +4,145 @@
     The home page of the web site has a headline section, which only has space for article titles which are 65 characters or less.
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
-function potentialHeadlines(allArticleTitles) {
-    // TODO
-}
 
-/*
+    // function potentialHeadlines(allArticleTitles) {
+    //     // Create an empty array to store the potential headlines
+    //     const potentialHeadlines = [];
+
+    //     // Loop through each article title in the input array
+    //     for (let i = 0; i < allArticleTitles.length; i++) {
+    //       const articleTitle = allArticleTitles[i];
+
+    //       // Check if the title is 65 characters or less
+    //       if (articleTitle.length <= 65) {
+    //         // If it is, add it to the potential headlines array
+    //         potentialHeadlines.push(articleTitle);
+    //       }
+    //     }
+
+    //     // Return the array of potential headlines
+    //     return potentialHeadlines;
+    //   }
+
+
+    //   Using filter function with loops
+
+    // function filterPotentialHeadlines(allArticleTitles){
+    //   let potentialHeadlines = [];
+    //   for(let title of allArticleTitles){
+    //     if(title.length <= 65){
+    //       potentialHeadlines.push(title);
+    //     }
+    //   }
+    //   return potentialHeadlines;
+    // }
+
+    // const allArticleTitles = [   "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",
+    // "Labor 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 Elan 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",]
+    //   console.log(filterPotentialHeadlines(allArticleTitles));
+
+
+    //   Using the filter function without loops
+
+
+    function isPotentialHeadline(articleTitle){
+      return articleTitle.length <= 65;
+    }
+
+    function filterPotentialHeadlines(articleTitles){ 
+      // Here filter takes the function as a parameter
+      return articleTitles.filter(isPotentialHeadline);    
+    }
+
+      const articleTitles = [  "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",
+      "Labor 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 Elan 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",]
+
+      console.log(filterPotentialHeadlines(articleTitles));
+
+
+
+
+
+/* 
     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
+          function titleWithFewestWords(allArticleTitles) {
+
+  let fewestWords = allArticleTitles[0];
+
+  for (let i = 0; i < allArticleTitles.length; i++) {
+    if (fewestWords.length > allArticleTitles[i].length) {
+      fewestWords = allArticleTitles[i];
+    }
+  }
+
+  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
-}
+    const headlinesWithNumbers = [];
+
+    for (let i = 0; i < allArticleTitles.length; i++) {
+      const articleTitle = allArticleTitles[i];
+
+      for (let j = 0; j < articleTitle.length; j++) {
+        const character = articleTitle.charAt(j);
+
+        if (!isNaN(parseInt(character))) {
+          headlinesWithNumbers.push(articleTitle);
+        }
+      }
+    }
+
+    return headlinesWithNumbers;
+  }
+
 
 /*
     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 totalChars = 0;
+
+    for (let i = 0; i < allArticleTitles.length; i++) {
+      totalChars += allArticleTitles[i].length;
+    }
+
+    const averageChars = Math.round(totalChars / allArticleTitles.length);
+
+    return averageChars;
+  }
+
+
 
+
 
 
 /* ======= List of Articles - DO NOT MODIFY ===== */
@@ -42,9 +151,9 @@ const ARTICLE_TITLES = [
     "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",
+    "Labor 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",
+    "Chinese social media users blast Elan 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",
@@ -53,16 +162,16 @@ const ARTICLE_TITLES = [
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 test("should only return potential headlines", () => {
-    expect(new Set(potentialHeadlines(ARTICLE_TITLES))).toEqual(new Set([
+    expect(new Set(filterPotentialHeadlines(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",
+        "Labor 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(filterPotentialHeadlines([])).toEqual([]);
 });
 
 test("should return the title with the fewest words", () => {