Glasgow_6-Najah_Farah-Js_3

1-exercises/A-undefined/exercise.js

@@ -12,16 +12,18 @@
 // Example 1
 let a;
 console.log(a);
-
+// element a has no value
 
 // Example 2
 function sayHello() {
     let message = "Hello";
 }
 
+
 let hello = sayHello();
 console.log(hello);
 
+// the function is missing from the callback
 
 // Example 3
 function sayHelloToUser(user) {
@@ -30,7 +32,9 @@ function sayHelloToUser(user) {
 
 sayHelloToUser();
 
-
+// the function is missing the callback variable 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+
+// index 3 does not exist in the array

1-exercises/B-array-literals/exercise.js

@@ -4,8 +4,8 @@
   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","Douglas","Irina","Michael"] ;// Create an array with the names of the mentors: Daniel, Irina and Rares
 
 /* 
   DO NOT EDIT BELOW THIS LINE

1-exercises/C-array-get-set/exercise.js

@@ -5,11 +5,11 @@
 */
 
 function first(arr) {
-  return; // complete this statement
+  return arr[0]; // complete this statement
 }
 
 function last(arr) {
-  return; // complete this statement
+  return arr.pop(); // complete this statement
 }
 
 /* 

1-exercises/C-array-get-set/exercises2.js

@@ -7,7 +7,7 @@
 */
 
 let numbers = [1, 2, 3]; // Don't change this array literal declaration
-
+numbers.push(4);
 /* 
   DO NOT EDIT BELOW THIS LINE
   --------------------------- */

1-exercises/D-for-loop/exercise.js

@@ -27,7 +27,18 @@ const AGES = [
 ];
 
 // TODO - Write for loop code here
+function intro(){
+let list = []
+for (let i = 0;i < WRITERS.length;){
+   list.push(`${WRITERS[i]}is ${AGES[i]} years old`)
+   i++
 
+} 
+return list
+
+}
+
+console.log(intro())
 /*
 The output should look something like this:
 

1-exercises/E-while-loop-with-array/exercise.js

@@ -16,8 +16,15 @@ const BIRTHDAYS = [
     "November 15th"
 ];
 
-function findFirstJulyBDay(birthdays) {
-    // TODO
+function findFirstJulyBDay() {
+    let first = ' ';
+    let arr = 0
+    while(arr < BIRTHDAYS.length){ if (BIRTHDAYS[arr].includes('July 11th')){
+        first=BIRTHDAYS[arr];
+    }
+ arr ++
+    }
+    return first
 }
 
-console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"
+console.log(findFirstJulyBDay()); // should output "July 11th"

2-mandatory/1-weather-report.js

@@ -10,10 +10,29 @@
             For example, "The temperature in London is 10 degrees"
         - Hint: you can call the temperatureService function from your function
 */
-
+let usersCities = [
+    "London",
+    "Paris",
+    "São Paulo",
+    "Barcelona",
+    "Dubai"
+]
 function getTemperatureReport(cities) {
-    // TODO
-}
+    let report = [];
+
+    for (let i = 0; i < cities.length; i++) {
+      let city = cities[i];
+      let temperature = temperatureService(city);
+
+      report.push(`The temperature in ${city} is ${temperature} degrees`);
+    }
+
+    return report;
+  }
+
+
+
+
 
 
 /* ======= TESTS - DO NOT MODIFY ===== */

2-mandatory/2-financial-times.js

@@ -4,51 +4,113 @@
     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
+
+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",
+];
+
+
+
+
+
+
+
+
+function potentialHeadlines(ARTICLE_TITLES) {
+let newArray= [];
+
+ for (let i=0;i < ARTICLE_TITLES.length; i++){
+    if ( ARTICLE_TITLES[i].length<= 65){
+        newArray.push(ARTICLE_TITLES[i])
+    }
+
+ }
+
+ return newArray
 }
 
 /*
     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) {
-    // TODO
+function titleWithFewestWords(ARTICLE_TITLES) {
+    let smallestTitle= ARTICLE_TITLES[0]; 
+
+    for (let i = 1; i < ARTICLE_TITLES.length; i++) { 
+        if (ARTICLE_TITLES[i].split(' ').length < smallestTitle.split(' ').length) {
+            smallestTitle = ARTICLE_TITLES[i];
+        }
+    }
+
+    return smallestTitle;
 }
 
+
 /*
     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 headlinesWithNumbers(allArticleTitles) {
-    // TODO
+    function headlinesWithNumbers(allArticleTitles) {
+        let headlines = [];
+
+        for (let i = 0; i < allArticleTitles.length; i++) {
+          let title = allArticleTitles[i];
+          let hasNumber = false;
+
+          for (let j = 0; j < title.length; j++) {
+            let char = title[j];
+
+            if (char >= '0' && char <= '9') {
+              hasNumber = true;
+              break;
+            }
+          }
+
+          if (hasNumber) {
+            headlines.push(title);
+          }
+        }
+
+        return headlines;
+      }
+
 }
 
 /*
     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 totalCharacters = 0;
+
+    for (let i = 0; i < allArticleTitles.length; i++) {
+      let title = allArticleTitles[i];
+      totalCharacters += title.length;
+    }
+
+    let averageCharacters = totalCharacters / allArticleTitles.length;
+    let roundedAverageCharacters = Math.round(averageCharacters);
+
+    return roundedAverageCharacters;
+  }
+
 
 
 
 /* ======= 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",
-];
+
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

2-mandatory/3-stocks.js

@@ -34,7 +34,26 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
         Functions can help with this!
 */
 function getAveragePrices(closingPricesForAllStocks) {
-    // TODO
+    function getAveragePrices(closingPricesForAllStocks) {
+        let averages = [];
+
+        for (let i = 0; i < closingPricesForAllStocks.length; i++) {
+          let prices = closingPricesForAllStocks[i];
+          let total = 0;
+
+          for (let j = 0; j < prices.length; j++) {
+            total += prices[j];
+          }
+
+          let average = total / prices.length;
+          let roundedAverage = Number(average.toFixed(2));
+
+          averages.push(roundedAverage);
+        }
+
+        return averages;
+      }
+
 }
 
 /*
@@ -48,7 +67,22 @@ 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
+    function getPriceChanges(closingPricesForAllStocks) {
+        let changes = [];
+
+        for (let i = 0; i < closingPricesForAllStocks.length; i++) {
+          let prices = closingPricesForAllStocks[i];
+          let firstPrice = prices[0];
+          let lastPrice = prices[prices.length - 1];
+          let change = lastPrice - firstPrice;
+          let roundedChange = Number(change.toFixed(2));
+
+          changes.push(roundedChange);
+        }
+
+        return changes;
+      }
+
 }
 
 /*
@@ -64,8 +98,19 @@ function getPriceChanges(closingPricesForAllStocks) {
     The price should be shown with exactly 2 decimal places.
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
-    // TODO
-}
+    let descriptions = [];
+
+    for (let i = 0; i < closingPricesForAllStocks.length; i++) {
+      let prices = closingPricesForAllStocks[i];
+      let highestPrice = Math.max(...prices);
+      let stock = stocks[i].toUpperCase();
+      let description = `The highest price of ${stock} in the last 5 days was ${highestPrice.toFixed(2)}`;
+      descriptions.push(description);
+    }
+
+    return descriptions;
+  }
+
 
 
 /* ======= TESTS - DO NOT MODIFY ===== */