Js/week3/denis p

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

@@ -7,7 +7,11 @@
 
 var names = ["Rakesh", "Antonio", "Alexandra", "Andronicus", "Annam", "Mikey", "Anastasia", "Karim", "Ahmed"];
 
-var longNameThatStartsWithA = findLongNameThatStartsWithA(names);
+function findLongNameThatStartsWithA(names){
+  return names[0] === 'A' && names.length > 7;
+}
+
+var longNameThatStartsWithA = names.find(findLongNameThatStartsWithA);
 
 console.log(longNameThatStartsWithA);
 

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

@@ -15,7 +15,14 @@ var pairsByIndex = [[0, 3], [1, 2], [2, 1], null, [3, 0]];
 var students = ["Islam", "Lesley", "Harun", "Rukmini"];
 var mentors = ["Daniel", "Irina", "Mozafar", "Luke"];
 
+function isNull(num){
+  return num === null;
+} 
+
 var pairs = pairsByIndex.map(function(indexes) {
+  if(isNull(indexes)){
+    process.exit(1);
+  }
   var student = students[indexes[0]];
   var mentor = mentors[indexes[1]];
   return [student, mentor];

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

@@ -5,7 +5,11 @@
 var students = ["Omar", "Austine", "Dany", "Swathi", "Lesley", "Rukmini"];
 var group = ["Austine", "Dany", "Swathi", "Daniel"];
 
-var groupIsOnlyStudents; // complete this statement
+function isInGroup(name){
+  return students.includes(name);
+}
+
+var groupIsOnlyStudents = group.every(isInGroup); // 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 +3,25 @@
 
 var numbers = [0.1, 0.2, 0.3, 0.4, 0.5];
 
+let multiplyBy100 = numbers.map(item => item *100);
+console.log(multiplyBy100);
+
+/////////////////////////////////////////////
+/////////////////////////////////////////////
+
+function multiplyBy100_1(number){
+    return number * 100;
+}
+
+let numbersMultipliedBy100 = numbers.map(multiplyBy100_1);
+
+console.log(numbersMultipliedBy100);
+
+/////////////////////////////////////////////
+/////////////////////////////////////////////
+
+let numbersMultipliedBy100_1 = numbers.map(function(number){
+    return number * 100;
+})
+
+console.log(numbersMultipliedBy100_1);

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

@@ -9,6 +9,23 @@
 
 var arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
 
+arr.forEach(number => {
+  if(number % 3 === 0 && number % 5 === 0){
+    console.log('FizzBuzz') ;
+  }
+  else if(number % 3 === 0){
+    console.log('Fizz') ;
+  }
+  else if(number % 5 === 0){
+    console.log('Buzz') ;
+  }
+  else{
+    console.log(number);
+  }
+})
+
+
+
 /* 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

@@ -7,8 +7,13 @@
   Tip: use the string method .split() and the array method .join()
 */
 
-function capitalise(str) {}
-
+function capitalise(str) {
+  let newStrArr = str.split('');
+  newStrArr[0] = newStrArr[0].toUpperCase();
+  return newStrArr.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

@@ -2,39 +2,56 @@
 Many years into the future, a team of Space Voyagers find their ship is low on Oxygen and need to dock
 somewhere safe while they call home for help.
 
-Their computer detects a list of nearby planets that have Oxygen in their atmosphere.
+Their computer detects a list of nearby planets that have Oxygen in their atmosphere. It has produced an array of their Oxygen levels.
 
-To be safe, they need to land on the first unamed planet that has Oxygen levels between 19.5% and 23.5%.
+To be safe to land on, a planet needs to have an Oxygen level between 19.5% and 23.5%.
 
-Write a function that finds the oxygen level of the first safe planet - Oxygen between 19.5% and 23.5%
+Write a function that finds the first safe oxygen level in the array - Oxygen between 19.5% and 23.5%
 */
 
-function safeLevels() {
-
+function safeLevels(arr) {
+    let firstSafeLevel = []; 
+    arr.map(oxygen =>{
+        if(parseFloat(oxygen) > 19.5 && parseFloat(oxygen) < 23.5) {
+            firstSafeLevel.push(oxygen);
+        }
+    });
+    return firstSafeLevel[0];
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
-const oxygenLevels1 = ["24.2%", "11.3%", "19.9%", "23.1%", "29.3%", "20.2%"]
-const oxygenLevels2 = ["30.8%", "23.5%", "18.8%", "19.5%", "20.2%", "31.6%"]
+const oxygenLevels1 = ["24.2%", "11.3%", "19.9%", "23.1%", "29.3%", "20.2%"];
+const oxygenLevels2 = ["30.8%", "23.5%", "18.8%", "19.5%", "20.2%", "31.6%"];
+const oxygenLevels3 = ["200%", "21.1%"];
+
+const util = require('util');
 
-function test(test_name, expr) {
+function test(test_name, actual, expected) {
     let status;
-    if (expr) {
-      status = "PASSED";
+    if (actual === expected) {
+        status = "PASSED";
     } else {
-      status = "FAILED";
+        status = `FAILED: expected: ${util.inspect(expected)} but your function returned: ${util.inspect(actual)}`;
     }
-  
+
     console.log(`${test_name}: ${status}`);
 }
 
 test(
-    "safeLevels function works - case 2",
-    safeLevels(oxygenLevels1) === "19.9%"
+    "safeLevels function works - case 1",
+    safeLevels(oxygenLevels1),
+    "19.9%"
 );
 
 test(
     "safeLevels function works - case 2",
-    safeLevels(oxygenLevels2) === "20.2%"
-);
+    safeLevels(oxygenLevels2),
+    "20.2%"
+);
+
+test(
+    "safeLevels function works - case 3",
+    safeLevels(oxygenLevels3),
+    "21.1%"
+);

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

@@ -10,25 +10,42 @@
   Use the tests to confirm which message to return
 */
 
-function bushChecker() {
-
+function isPink(str){
+  return str === 'pink';
 }
 
+function bushChecker(arr) {
+  if(arr.every(isPink)){
+    return "Bush is safe to eat from";
+  }
+  return "Toxic! Leave bush alone!";
+}
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 let bushBerryColours1 = ["pink", "pink", "pink", "neon", "pink", "transparent"]
 let bushBerryColours2 = ["pink", "pink", "pink", "pink"]
 
-function test(test_name, expr) {
-  let status;
-  if (expr) {
-    status = "PASSED";
-  } else {
-    status = "FAILED";
-  }
+const util = require('util');
+
+function test(test_name, actual, expected) {
+    let status;
+    if (actual === expected) {
+        status = "PASSED";
+    } else {
+        status = `FAILED: expected: ${util.inspect(expected)} but your function returned: ${util.inspect(actual)}`;
+    }
 
-  console.log(`${test_name}: ${status}`);
+    console.log(`${test_name}: ${status}`);
 }
 
-test("bushChecker funtion works - case 1", bushChecker(bushBerryColours1) === "Toxic! Leave bush alone!")
-test("bushChecker funtion works - case 1", bushChecker(bushBerryColours2) === "Bush is safe to eat from")
+test(
+  "bushChecker funtion works - case 1",
+  bushChecker(bushBerryColours1),
+  "Toxic! Leave bush alone!"
+);
+
+test(
+  "bushChecker funtion works - case 1",
+  bushChecker(bushBerryColours2),
+  "Bush is safe to eat from"
+);

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

@@ -8,8 +8,22 @@
   NOTE: don't include any element that is not a "family".
 */
 
-function colonisers() {
+function isFamily(arr){
+  let newArr = [];
+  arr.map(item => item.includes('family') ? newArr.push(item) : '');
+  return newArr;
+}
+
+function startsWithA(arr){
+  let newArr = [];
+  arr.map(item => item[0] === 'A' || item[0] === 'a' ? newArr.push(item) : '');
+  return newArr;
+}
 
+function colonisers(arr) {
+    let familyArray = isFamily(arr);
+    let colonisersFamilies = startsWithA(familyArray);
+    return colonisersFamilies;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
@@ -29,29 +43,21 @@ const voyagers = [
   "Archer family"
 ];
 
-function arraysEqual(a, b) {
-  if (a === b) return true;
-  if (a == null || b == null) return false;
-  if (a.length != b.length) return false;
-
-  for (let i = 0; i < a.length; ++i) {
-    if (a[i] !== b[i]) return false;
-  }
-
-  return true;
-}
+const util = require('util');
 
-function test(test_name, expr) {
-  let status;
-  if (expr) {
-    status = "PASSED";
-  } else {
-    status = "FAILED";
-  }
+function test(test_name, actual, expected) {
+    let status;
+    if (util.isDeepStrictEqual(actual, expected)) {
+        status = "PASSED";
+    } else {
+        status = `FAILED: expected: ${util.inspect(expected)} but your function returned: ${util.inspect(actual)}`;
+    }
 
-  console.log(`${test_name}: ${status}`);
+    console.log(`${test_name}: ${status}`);
 }
 
-test("colonisers function works",
-  arraysEqual(colonisers(voyagers), ["Adam family", "Avery family", "Archer family"])
-)
+test(
+  "colonisers function works",
+  colonisers(voyagers),
+  ["Adam family", "Avery family", "Archer family"]
+)