David Czuczor

spec/data-types/objects/objects-and-arrays.spec.js

@@ -12,7 +12,7 @@ describe('Objects and Arrays:', () => {
   it('The price of apples should be updated to 2', () => {
     expect(answers.basket.items[0].price).toEqual(2)
   })
-
+-
   it('4 oranges priced at 0.75 should be added to the end of the items list', () => {
     expect(answers.basket.items[2]).toEqual({
       name: "Oranges",

src/conditional-flow/boolean-conditions.js

@@ -2,10 +2,18 @@
 // "Well done, you passed!" if the value is true, or "Sorry, try again"
 // if the value is false.
 function getResult (didPass) {
+  if (didPass) {
+    return "Well done, you passed!"
+  }
+  else {
+    return "Sorry, try again"
+  }
+
+}
 
   // TODO: write code in this function body to pass the tests
 
-}
+
 
 module.exports = {
   a: getResult

src/conditional-flow/multiple-conditions.js

@@ -2,19 +2,30 @@
 // than or equal to lower AND less than or equal to upper.
 // Implement this with a single condition.
 function isInRange (num, lower, upper) {
-
+  if (num>=lower && num<=upper) {
+    return true;
+  }
+  else {
+    return false;
+  }
+}
   // TODO: write code in this function body to pass the tests
 
-}
+
 
 // This function should return true if the passed string is equal
 // to "Hello" or "Goodbye". Implement this with a single
 // if statement.
 function isHelloOrGoodbye (val1) {
+ if (val1 === "Hello" || val1 === "Goodbye") {
+   return true
+ }
+ return false
 
+}
   // TODO: write code in this function body to pass the tests
 
-}
+
 
 // This function should return a string that describes the provided age value. The
 // table below shows for each range of age values what string should be returned.
@@ -28,10 +39,28 @@ function isHelloOrGoodbye (val1) {
 // 5-12   | Child
 // 13-19  | Teenager
 // 20+    | Adult
+
 function getAgeDescription (age) {
+  if (age === 0) {
+    return "Baby"
+  }
+  else if (age >= 1 && age <= 4) {
+    return "Toddler"
+  }
+  else if (age >= 5 && age <=12) {
+    return "Child"
+  }
+  else if (age > 12 && age < 20) {
+    return "Teenager"
+  }
+  else {
+    return "Adult"
+  }
+}
+
 
   // TODO: write code in this function body to pass the tests
-}
+
 
 module.exports = {
   a: isInRange,

src/conditional-flow/numeric-conditions.js

@@ -2,24 +2,50 @@
 
 // This function should return true if there are no elements in the array, false otherwise
 function isArrayEmpty (array) {
+  if (array.length === 0) {
+    return true
+  } 
+  else {
+    return false
+  }
+}
 
   // TODO: write code in this function body to pass the tests
 
-}
+
 
 // This function should return true if num1 is greater than num2, false otherwise
 function isGreaterThan (num1, num2) {
+  if (num1 > num2) {
+    return true
+  }
+  else {
+    return false
+  }
+}
 
   // TODO: write code in this function body to pass the tests
 
-}
+
 
 // This function should return the lowest number in the passed array
+
+
 function findLowest (nums) {
+  let smallest = nums[0]
+  for (let i = 1; i < nums.length; i++) {
+    if (nums[i] < smallest) {
+      smallest = nums[i]
+    }
+ }
+ return smallest
+}
+
+
 
   // TODO: write code in this function body to pass the tests
 
-}
+
 
 module.exports = {
   a: isArrayEmpty,

src/conditional-flow/string-conditions.js

@@ -1,20 +1,39 @@
 // This function should return true if the passed string is equal to "Hello"
 function isHello (val1) {
+  if (val1 === "Hello"){
+    return true
+  }
+  if (val1 !== "Hello") {
+    return false
+  }
+}
 
   // TODO: write code in this function body to pass the tests
 
-}
 
 // This function should return true if the passed string is not equal to "Hello"
 function isNotHello (val1) {
-
+  if (val1 !== "Hello") {
+    return true
+  }
+  if (val1 === "Hello") {
+    return false
+  }
+}
   // TODO: write code in this function body to pass the tests
 
-}
 
 // This function should return true if the string val1 is is longer
 // than string val2
+
 function isLongerThan (val1, val2) {
+  if (val1.length > val2.length) {
+    return true
+  }
+  else {
+    return false
+  }
+
 
   // TODO: write code in this function body to pass the tests
 
@@ -24,20 +43,46 @@ function isLongerThan (val1, val2) {
 // argument has an odd number of vowels
 
 function hasOddNumberVowels (val1) {
+  const vowels = ["a", "e", "i", "o", "u", "A", "E", "I", "O", "U"];
+  let vowelsInString = 0;
+  for (let i=0; i<val1.length; i++){
+    if (vowels.includes(val1[i])) {
+      vowelsInString++
+    }
+  }
+  return Boolean(vowelsInString % 2);
+}
+
+
+
+
 
+
   // TODO: write code in this function body to pass the tests
 
-}
+
 
 // this function should return the middle character of a string if it has an odd number
 // of characters. If there are an even number of characters the function should return
 // the middle two letters
 
 function getMiddleLetter (val1) {
-  // TODO: write code in this function body to pass the tests
-
+  if (val1.length % 2 === 1) {
+    let half = val1.length / 2;
+    let mid = Math.floor(half);
+    return val1[mid];
+  }
+  if (val1.length % 2 === 0) {
+    let middleTwo = val1.length / 2;
+    let middleOne = middleTwo - 1;
+    return  val1[middleOne] + val1[middleTwo];
+}
 }
 
+
+
+ // TODO: write code in this function body to pass the tests
+
 // This function should return the name of the season for the provided
 // month name. For example, "January" should return "Winter". If the provided
 // value is not a valid month, an empty string ("") should be returned. Use
@@ -47,10 +92,38 @@ function getMiddleLetter (val1) {
 // Summer - June to August
 // Autumn - September to November
 // Winter - December to February
+
 function seasonForMonth (monthName) {
+  switch (monthName) {
+    case "March":
+    case "April":
+    case "May":
+      season = "Spring"
+      break;
+    case "June":
+    case "July":
+    case "August":
+      season = "Summer"
+      break;
+    case "September":
+    case "October":
+    case "November":
+      season = "Autumn"
+      break;
+    case "December":
+    case "January":
+    case "February":
+      season = "Winter"
+      break;
+    default:
+      season = ""
+  }
+  return season;
+}
 
+
+
   // TODO: write code in this function body to pass the tests
-}
 
 module.exports = {
   a: isHello,

src/data-types/arrays/accessing-elements.js

@@ -4,16 +4,17 @@ const cities = ['London', 'Shanghai', 'New York', 'Delhi', 'Kuala Lumpur']
 // TODO: write code to pass the tests
 
 // Set names equal to an array containing 'Bob', 'Jane', 'Joanna' in that order
-const names = null
+const names = ["Bob", "Jane", "Joanna"]
 
 // Set fourthCity to the 4th element in the cities array
-const fourthCity = ''
+const fourthCity = cities[3]
 
 // Set firstCity to the 1st element in the cities array
-const firstCity = ''
+const firstCity = cities[0]
 
 // Set lengthOfCitiesArray to the length of the cities array
-const lengthOfCitiesArray = NaN
+const lengthOfCitiesArray = cities.length
+
 
 // Do not edit this exported object
 module.exports = {

src/data-types/arrays/adding-removing-elements.js

@@ -10,25 +10,25 @@ const fruits = ['Apple', 'Orange', 'Pear']
 // TODO: write code to pass the tests
 
 // Edit this code to add 'Fred' to the names array
-names.push(undefined)
+names.push("Fred")
 
 // Edit this code to add 4 to the end of the numbers array
-numbers.push(NaN)
+numbers.push(4)
 
 // Edit this code to add 'Rio' to the start of the cities array
-cities.unshift(undefined)
+cities.unshift("Rio")
 
 // Use an array method to remove the first item from colours
-colours
+colours.shift()
 
 // Use an array method to remove the last item from keys
-keys
+keys.pop()
 
 // Use an array method to remove 'Jordon' from the countries array
-countries.splice(NaN, NaN)
+countries.splice(1, 1)
 
 // use an array method to remove the last item from the fruits array and store the value in the pear variable
-const pear = fruits.undefined
+const pear = fruits.pop()
 
 // Do not edit this exported object
 module.exports = {

src/data-types/numbers.js

@@ -6,22 +6,22 @@ const numThree = 32
 // TODO: Add code below using Javascript numeric operators so that the tests pass
 
 // Set this variable to numOne added to numTwo
-const numOnePlusNumTwo = NaN
+const numOnePlusNumTwo = numOne + numTwo
 
 // Set this variable to numThree multiplied by numTwo
-const numThreeTimesNumTwo = NaN
+const numThreeTimesNumTwo = numThree * numTwo
 
 // Set this variable to numThree divided by numOne
-const numThreeDividedByNumOne = NaN
+const numThreeDividedByNumOne = numThree / numOne
 
 // Set this variable to numThree minus numOne
-const numThreeMinusNumOne = NaN
+const numThreeMinusNumOne = numThree - numOne
 
 // Set this variable to the sum of numOne, numTwo and numThree
-const sum = NaN
+const sum = numOne + numTwo + numThree
 
 // Set this variable to the sum of (numOne, numTwo, numThree) divided by numOne
-const numBytes = NaN
+const numBytes = (numOne + numTwo + numThree) / numOne
 
 // do not edit the exported object.
 module.exports = {