GT JS Week3

week-3/1-exercises/A-array-find/exercise.js

@@ -4,6 +4,9 @@
 */
 
 // write your code here
+function findLongNameThatStartsWithA(arr){
+  return arr.find(item => item.startsWith("A") && item.length > 7);
+}
 
 var names = ["Rakesh", "Antonio", "Alexandra", "Andronicus", "Annam", "Mikey", "Anastasia", "Karim", "Ahmed"];
 

week-3/1-exercises/B-array-some/exercise.js

@@ -11,6 +11,10 @@ var pairsByIndex = [[0, 3], [1, 2], [2, 1], null, [3, 0]];
 // If there is a null value in the array exit the program with the error code
 // https://nodejs.org/api/process.html#process_process_exit_code
 // process.exit(1);
+if(pairsByIndex.some(item => item === null)){
+  process.exit(1);
+}
+
 
 var students = ["Islam", "Lesley", "Harun", "Rukmini"];
 var mentors = ["Daniel", "Irina", "Mozafar", "Luke"];

week-3/1-exercises/C-array-every/exercise.js

@@ -5,7 +5,7 @@
 var students = ["Omar", "Austine", "Dany", "Swathi", "Lesley", "Rukmini"];
 var group = ["Austine", "Dany", "Swathi", "Daniel"];
 
-var groupIsOnlyStudents; // complete this statement
+var groupIsOnlyStudents = group.every(item => students.find(student => student === item)); // complete this statement
 
 if (groupIsOnlyStudents) {
   console.log("The group contains only students");

week-3/1-exercises/D-array-filter/exercise.js

@@ -8,7 +8,7 @@
 
 var pairsByIndexRaw = [[0, 3], [1, 2], [2, 1], null, [1], false, "whoops"];
 
-var pairsByIndex; // Complete this statement
+var pairsByIndex = pairsByIndexRaw.filter(item => Array.isArray(item) && item.length === 2 ); // Complete this statement
 
 var students = ["Islam", "Lesley", "Harun", "Rukmini"];
 var mentors = ["Daniel", "Irina", "Mozafar", "Luke"];

week-3/1-exercises/E-array-map/exercise.js

@@ -3,3 +3,26 @@
 
 var numbers = [0.1, 0.2, 0.3, 0.4, 0.5];
 
+function multiplyByHundred(item){
+    return item * 100;
+}
+
+let numbers1 = numbers.map(multiplyByHundred);
+
+console.log(numbers1);
+
+let numbers2 = numbers.map(function multiplyBy100(item){return item * 100;});
+
+console.log(numbers2);
+
+let numbers3 = numbers.map(function (item){return item * 100;});
+
+console.log(numbers3);
+
+let numbers4 = numbers.map(item => {return item * 100;});
+
+console.log(numbers4);
+
+let numbers5 = numbers.map(item => item * 100);
+
+console.log(numbers5);

week-3/1-exercises/F-array-forEach/exercise.js

@@ -8,7 +8,16 @@
 */
 
 var arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
-
+arr.forEach((item) => {
+  if(item % 3 === 0 && item % 5 === 0){
+    console.log("FizzBuzz");
+  }else if (item % 3 === 0){
+    console.log("Fizz");
+  }else if(item % 5 === 0){
+    console.log("Buzz");
+  }else {console.log(item);}
+  }
+  );
 /* EXPECTED OUTPUT */
 
 /*

week-3/1-exercises/G-array-methods/exercise.js

@@ -4,7 +4,7 @@
 */
 
 var numbers = [3, 2, 1];
-var sortedNumbers; // complete this statement
+var sortedNumbers = numbers.sort(); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE

week-3/1-exercises/G-array-methods/exercise2.js

@@ -7,7 +7,7 @@
 var mentors = ["Daniel", "Irina", "Rares"];
 var students = ["Rukmini", "Abdul", "Austine", "Swathi"];
 
-var everyone; // complete this statement
+var everyone = mentors.concat(students); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE

week-3/1-exercises/H-array-methods-2/exercise.js

@@ -15,8 +15,8 @@ var everyone = [
   "Swathi"
 ];
 
-var firstFive; // complete this statement
-var lastFive; // complete this statement
+var firstFive = everyone.slice(0, 5); // complete this statement
+var lastFive = everyone.slice(-5); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE

week-3/1-exercises/H-array-methods-2/exercise2.js

@@ -7,7 +7,11 @@
   Tip: use the string method .split() and the array method .join()
 */
 
-function capitalise(str) {}
+function capitalise(str) {
+  let arr = str.split("");
+  arr[0] = arr[0].toUpperCase();
+  return arr.join("");
+}
 
 /* 
   DO NOT EDIT BELOW THIS LINE

week-3/1-exercises/H-array-methods-2/exercise3.js

@@ -7,7 +7,7 @@
 var ukNations = ["Scotland", "Wales", "England", "Northern Ireland"];
 
 function isInUK(country) {
-  return; // complete this statement
+  return ukNations.includes(country); // complete this statement
 }
 
 /* 

week-3/2-mandatory/1-oxygen-levels.js

@@ -9,7 +9,8 @@ To be safe, they need to land on the first unamed planet that has Oxygen levels
 Write a function that finds the oxygen level of the first safe planet - Oxygen between 19.5% and 23.5%
 */
 
-function safeLevels() {
+function safeLevels(arr) {
+  return arr.find(oxLevel => parseFloat(oxLevel) > 19.5 && parseFloat(oxLevel) < 23.5);
 
 }
 

week-3/2-mandatory/2-bush-berries.js

@@ -10,8 +10,11 @@
   Use the tests to confirm which message to return
 */
 
-function bushChecker() {
-
+function bushChecker(arr) {
+  if(arr.some(berryColor => berryColor != "pink")){
+    return "Toxic! Leave bush alone!";
+    }
+  return "Bush is safe to eat from";
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

week-3/2-mandatory/3-space-colonies.js

@@ -8,7 +8,8 @@
   NOTE: don't include any element that is not a "family".
 */
 
-function colonisers() {
+function colonisers(arr) {
+  return arr.filter(item => item.startsWith("A") && item.includes("family"));
 
 }
 

week-3/2-mandatory/4-eligible-students.js

@@ -7,8 +7,8 @@
   - Returns an array containing only the names of the who have attended AT LEAST 8 classes
 */
 
-function eligibleStudents() {
-
+function eligibleStudents(arr) {
+    return arr.filter(item => item[1] > 7).map(item => item[0]);
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

week-3/2-mandatory/5-journey-planner.js

@@ -7,8 +7,8 @@
   NOTE: only the names should be returned, not the means of transport.
 */
 
-function journeyPlanner() {
-
+function journeyPlanner(arr, by) {
+    return arr.filter(item => item.includes(by)).map(item => item[0]);
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

week-3/2-mandatory/6-lane-names.js

@@ -4,8 +4,8 @@
   Write a function that will return all street names which contain 'Lane' in their name.
 */
 
-function getLanes() {
-
+function getLanes(arr) {
+    return arr.filter(item => item.includes("Lane"));
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

week-3/2-mandatory/7-password-validator.js

@@ -21,11 +21,30 @@ Expected Result:
 PasswordValidationResult=  [false, false, false, false, true]
 
 */
-
 function validatePasswords(passwords) {
+    return passwords.map((password,index,arr) => {
 
+      let passwordArray = password.split("");
+
+      return password.length > 5 && // check the min length of password
+      // check if the password is duplicated
+      index === arr.indexOf(password)  && 
+      // check if the password have uppercase letter
+      passwordArray.some(item => item >= "A" && item <= "Z") && 
+      // check if the password have lowercase letter
+      passwordArray.some(item => item >= "a" && item <= "z") &&
+      // check if the password have number
+      passwordArray.some(item => item >= "0" && item <= "9") &&
+      // check if the password have special symbols
+      passwordArray.some(item =>["!", "#", "$", "%", "."].includes(item)) && 
+      /* this validation for exception of all symbols that are not English alphabet symbols,
+      not numbers or non-alphanumeric symbols ("!", "#", "$", "%", "."). */
+      passwordArray.every(item =>(item >= "A" && item <= "Z") || (item >= "a" && item <= "z")  || 
+      (item >= "0" && item <= "9") || ["!", "#", "$", "%", "."].includes(item));
+    });
 }
 
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 const passwords1 = ["Se%5", "TktE.TJTU", "384#HsHF", "dvyyeyy!5", "tryT3729"]

week-3/2-mandatory/8-codewars.md

@@ -30,4 +30,6 @@ Today, you'll be using a platform called [CodeWars](https://codewars.com) to hel
 - [people in bus](https://www.codewars.com/kata/number-of-people-in-the-bus/train/javascript)
 - [sum without highest and lowest](https://www.codewars.com/kata/sum-without-highest-and-lowest-number/train/javascript)
 - [reveersed array of digits](https://www.codewars.com/kata/convert-number-to-reversed-array-of-digits/train/javascript)
-- [slash sum of negatives](https://www.codewars.com/kata/count-of-positives-slash-sum-of-negatives/train/javascript)
+- [slash sum of negatives](https://www.codewars.com/kata/count-of-positives-slash-sum-of-negatives/train/javascript)
+
+

week-3/3-extra/card-validator.js

@@ -0,0 +1,38 @@
+// - Number must be 16 digits, all of them must be numbers
+// - You must have at least two different digits represented (all of the digits cannot be the same)
+// - The final digit must be even
+// - The sum of all the digits must be greater than 16
+
+function isBankCardValid(cardNumber){
+    let numberArray = cardNumber.split("");
+
+    firstGroup = cardNumber.slice(0, 4);
+    secondGroup = cardNumber.slice(4, 8);
+    thirdGroup = cardNumber.slice(8, 12);
+    fourthGroup = cardNumber.slice(12);
+    if (numberArray.length !== 16){
+        return `The bank card number ${firstGroup} ${secondGroup} ${thirdGroup} ${fourthGroup} is not valid.length`;    
+    }// check if a length of card number equals 16
+    if (numberArray.some(number =>  !(number >=0 && number <= 9))){
+         return `The bank card number ${firstGroup} ${secondGroup} ${thirdGroup} ${fourthGroup} is not valid. There is non number characters.`; 
+    }// check if all characters in card number are digit
+    if(numberArray.reduce((accumulator, number) => accumulator + parseInt(number),0) <= 16){
+        return `The bank card number ${firstGroup} ${secondGroup} ${thirdGroup} ${fourthGroup} is not valid. The summ of numbers is lower than 16`; 
+    }// check if a summ of all digits is greater or equals to 16
+    if(numberArray[15] % 2 === 1){
+        return `The bank card number ${firstGroup} ${secondGroup} ${thirdGroup} ${fourthGroup} is not valid. The last number is not even.`; 
+    }// check if the last is an even digit
+    if(numberArray.every((number, index, arr) => number === numberArray[0])){
+        return `The bank card number ${firstGroup} ${secondGroup} ${thirdGroup} ${fourthGroup} is not valid. All numbers the same.`; 
+    }// check if all didgits are the same
+    return `The bank card number ${firstGroup} ${secondGroup} ${thirdGroup} ${fourthGroup} is valid.`;
+
+}
+console.log(isBankCardValid("9999777788880000"));
+console.log(isBankCardValid("6666666666661666"));
+console.log(isBankCardValid("a92332119c011112"));
+console.log(isBankCardValid("4444444444444444"));
+console.log(isBankCardValid("1111111111111110"));
+console.log(isBankCardValid("6666666666666661"));
+
+