glasgow class 6-siver omar-javascript 1-week3

1-exercises/A-undefined/exercise.js

@@ -12,25 +12,28 @@
 // Example 1
 let a;
 console.log(a);
-
+//let does not have any value
 
 // Example 2
 function sayHello() {
     let message = "Hello";
+// sayHello inside is empty,doesnt return any value
 }
 
 let hello = sayHello();
 console.log(hello);
-
+//
 
 // Example 3
-function sayHelloToUser(user) {
+function sayHelloToUser(user) { 
     console.log(`Hello ${user}`);
 }
 
-sayHelloToUser();
+sayHelloToUser(); //this function is called but no parameter has been passed
+//so the variable user has no value
 
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+//3 is not an item of arr 

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

@@ -4,8 +4,9 @@
   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

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[arr.length-1]; // complete this statement
 }
 
 /* 
@@ -21,6 +21,7 @@ let names = ["Irina", "Ashleigh", "Mozafar", "Joe"];
 console.log(first(numbers));
 console.log(last(numbers));
 console.log(last(names));
+console.log(first(names));
 
 /* 
   EXPECTED RESULT

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

@@ -7,7 +7,8 @@
 */
 
 let numbers = [1, 2, 3]; // Don't change this array literal declaration
-
+numbers[0]=1;
+numbers.push(4);
 /* 
   DO NOT EDIT BELOW THIS LINE
   --------------------------- */

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

@@ -25,6 +25,9 @@ const AGES = [
     63,
     49
 ];
+for(let i =0; i<WRITERS.length;i++){
+    console.log(`${WRITERS[i]} is ${AGES[i]} years old.`)
+}
 
 // TODO - Write for loop code here
 

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

@@ -18,6 +18,12 @@ 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"

2-mandatory/1-weather-report.js

@@ -12,32 +12,34 @@
 */
 
 function getTemperatureReport(cities) {
-    // TODO
-}
+    let newArray = [];
+    for (let i = 0; i < cities.length; i++) {
+        let degrees = temperatureService(cities[i]);
+        const statement = `The temperature in ${cities[i]} is ${degrees} degrees`;
+        newArray.push(statement);
+      }
+      return newArray;
+    }
 
 
 /* ======= 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 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"
-    ]
+    let usersCities = ["London", "Paris", "São Paulo"];
+
 
     expect(getTemperatureReport(usersCities)).toEqual([
         "The temperature in London is 10 degrees",
@@ -47,10 +49,7 @@ test("should return a temperature report for the user's cities", () => {
 });
 
 test("should return a temperature report for the user's cities (alternate input)", () => {
-    let usersCities = [
-        "Barcelona",
-        "Dubai"
-    ]
+      let usersCities = ["Barcelona", "Dubai"];
 
     expect(getTemperatureReport(usersCities)).toEqual([
         "The temperature in Barcelona is 17 degrees",
@@ -60,4 +59,4 @@ test("should return a temperature report for the user's cities (alternate input)
 
 test("should return an empty array if the user hasn't selected any cities", () => {
     expect(getTemperatureReport([])).toEqual([]);
-});
+});

2-mandatory/2-financial-times.js

@@ -5,16 +5,30 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
-    // TODO
+    let returnedArray = [];
+    for (let i = 0; i < allArticleTitles.length; i++) {
+        if (allArticleTitles[i].length <= 65) {
+          returnedArray.push(allArticleTitles[i]);
+        }
+      }
+      return returnedArray;
 }
-
+// npm test -- --testPathPattern 2-financial-times
 /*
     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
+    let min = Infinity;
+    let tempIndex;
+    for (let i = 0; i < allArticleTitles.length; i++) {
+      if (allArticleTitles[i].length < min) {
+        min = allArticleTitles[i].length;
+        tempIndex = i;
+      }
+    }
+    return allArticleTitles[tempIndex];
 }
 
 /*
@@ -24,6 +38,18 @@ function titleWithFewestWords(allArticleTitles) {
 */
 function headlinesWithNumbers(allArticleTitles) {
     // TODO
+    let headlinesWithNumber = [];
+
+  for (let i = 0; i < allArticleTitles.length; i++) {
+    for (let j = 0; j < allArticleTitles[i].length; j++) {
+      if (!isNaN(parseInt(allArticleTitles[i][j]))) {
+        headlinesWithNumber.push(allArticleTitles[i]);
+        break;
+      }
+    }
+  }
+  return headlinesWithNumber;
+
 }
 
 /*
@@ -32,6 +58,12 @@ function headlinesWithNumbers(allArticleTitles) {
 */
 function averageNumberOfCharacters(allArticleTitles) {
     // TODO
+    let totalChars = 0;
+    for (let i = 0; i < allArticleTitles.length; i++) {
+      totalChars += allArticleTitles[i].length;
+    }
+    let avgChars = Math.round(totalChars / allArticleTitles.length);
+    return avgChars;
 }
 
 

2-mandatory/3-stocks.js

@@ -35,6 +35,18 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
 */
 function getAveragePrices(closingPricesForAllStocks) {
     // TODO
+    let newAr = [];
+    for (const element of closingPricesForAllStocks) {
+      let sum = 0;
+      let average = 0;
+      for (let i = 0; i < element.length; i++) {
+        sum += element[i];
+      }
+      average = sum / element.length;
+      newAr.push(Math.round(average * 100) / 100);
+    }
+
+    return newAr;
 }
 
 /*
@@ -49,6 +61,13 @@ function getAveragePrices(closingPricesForAllStocks) {
 */
 function getPriceChanges(closingPricesForAllStocks) {
     // TODO
+    let returnedArray = [];
+    for (let element of closingPricesForAllStocks) {
+      let [...newArr] = element;
+      let changes = newArr[newArr.length - 1] - newArr[0];
+      returnedArray.push(Math.round(changes * 100) / 100);
+    }
+    return returnedArray;
 }
 
 /*
@@ -65,6 +84,20 @@ function getPriceChanges(closingPricesForAllStocks) {
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
     // TODO
+    const hightestPrice=[];
+    let maxPrice=0;
+    for(let k=0; k<stocks.length;){
+    for(let i=0; i< closingPricesForAllStocks.length; i++){
+
+       maxPrice=Math.max(...closingPricesForAllStocks[i]);
+       hightestPrice.push(`The highest price of ${stocks[k].toUpperCase()} in the last 5 days was ${maxPrice.toFixed(2)}`)
+       maxPrice=0;
+       k++;
+
+}
+
+return hightestPrice;
+}
 }