Nico JS Fundamentals

src/conditional-flow/boolean-conditions.js

@@ -2,11 +2,15 @@
 // "Well done, you passed!" if the value is true, or "Sorry, try again"
 // if the value is false.
 function getResult (didPass) {
-
   // TODO: write code in this function body to pass the tests
-
+  if (didPass === true) {
+    return 'Well done, you passed!'
+  } else {
+    return 'Sorry, try again'
+  }
 }
 
+
 module.exports = {
   a: getResult
 }

src/conditional-flow/multiple-conditions.js

@@ -2,18 +2,18 @@
 // than or equal to lower AND less than or equal to upper.
 // Implement this with a single condition.
 function isInRange (num, lower, upper) {
-
-  // TODO: write code in this function body to pass the tests
-
+  if (num >= lower && num <= upper) {
+    return true;
+  } else { return false }
 }
 
 // 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) {
-
-  // TODO: write code in this function body to pass the tests
-
+  if (val1 === 'Hello' || val1 === 'Goodbye') {
+    return true;
+  } else { return false }
 }
 
 // This function should return a string that describes the provided age value. The
@@ -29,8 +29,11 @@ function isHelloOrGoodbye (val1) {
 // 13-19  | Teenager
 // 20+    | Adult
 function getAgeDescription (age) {
-
-  // TODO: write code in this function body to pass the tests
+  if (age < 1) { return 'Baby' }
+  else if (age >= 1 && age < 5) {return 'Toddler'}
+  else if (age >= 5 && age < 13) {return 'Child'}
+  else if (age >= 13 && age <= 19) {return 'Teenager'}
+  else {return 'Adult'}
 }
 
 module.exports = {

src/conditional-flow/numeric-conditions.js

@@ -2,23 +2,25 @@
 
 // This function should return true if there are no elements in the array, false otherwise
 function isArrayEmpty (array) {
-
-  // TODO: write code in this function body to pass the tests
-
+  if (array.length === 0) {
+    return true
+  } else {
+    return false
+  }
 }
 
 // This function should return true if num1 is greater than num2, false otherwise
 function isGreaterThan (num1, num2) {
-
-  // TODO: write code in this function body to pass the tests
-
+  if (num1 > num2) {
+    return true
+  } else {
+    return false
+  }
 }
 
 // This function should return the lowest number in the passed array
 function findLowest (nums) {
-
-  // TODO: write code in this function body to pass the tests
-
+  return Math.min(...nums)
 }
 
 module.exports = {

src/conditional-flow/string-conditions.js

@@ -1,41 +1,56 @@
 // This function should return true if the passed string is equal to "Hello"
-function isHello (val1) {
-
+function isHello(val1) {
   // TODO: write code in this function body to pass the tests
-
+  if (val1 === "Hello") {
+    return true;
+  } else {
+    return false;
+  }
 }
 
 // This function should return true if the passed string is not equal to "Hello"
-function isNotHello (val1) {
-
+function isNotHello(val1) {
   // TODO: write code in this function body to pass the tests
-
+  if (val1 !== "Hello") {
+    return true;
+  } else {
+    return false;
+  }
 }
 
 // This function should return true if the string val1 is is longer
 // than string val2
-function isLongerThan (val1, val2) {
-
+function isLongerThan(val1, val2) {
   // TODO: write code in this function body to pass the tests
-
+  if (val1.length > val2.length) {
+    return true;
+  } else {
+    return false;
+  }
 }
 
 // This function should return true if the string passed in the function's first
 // argument has an odd number of vowels
-
-function hasOddNumberVowels (val1) {
-
-  // TODO: write code in this function body to pass the tests
-
+const vowels = ["a", "e", "i", "o", "u", "A", "E", "I", "O", "U"];
+
+function hasOddNumberVowels(val1) {
+  let vowelsCount = 0;
+  for (let i = 0; i < val1.length; i++) {
+    if (vowels.includes(val1[i])) { vowelsCount++ }
+  }
+  if (vowelsCount % 2 !== 0) { return true }
+  else { return false }
 }
 
 // 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
-
+function getMiddleLetter(val1) {
+  if (val1.length % 2 !== 0) {
+    return val1.charAt(val1.length / 2)
+  } else {
+    return val1.charAt((val1.length / 2) - 1) + val1.charAt(val1.length / 2)
+  }
 }
 
 // This function should return the name of the season for the provided
@@ -47,9 +62,16 @@ function getMiddleLetter (val1) {
 // Summer - June to August
 // Autumn - September to November
 // Winter - December to February
-function seasonForMonth (monthName) {
-
-  // TODO: write code in this function body to pass the tests
+function seasonForMonth(monthName) {
+  if (monthName === "March" || monthName === "April" || monthName === "May") {
+    return "Spring";
+  } else if (monthName === "June" || monthName === "July" || monthName === "August") {
+    return "Summer";
+  } else if (monthName === "September" || monthName === "October" || monthName === "November") {
+    return "Autumn";
+  } else if (monthName === "December" || monthName === "January" || monthName === "February") {
+    return "Winter";
+  } else { return "" }
 }
 
 module.exports = {
@@ -58,5 +80,5 @@ module.exports = {
   c: isLongerThan,
   d: hasOddNumberVowels,
   e: getMiddleLetter,
-  f: seasonForMonth
-}
+  f: seasonForMonth,
+};

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

@@ -4,16 +4,16 @@ 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)
+// Use an array method to remove 'Jordan' from the countries array
+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 = {

src/data-types/objects/creating-objects.js

@@ -1,7 +1,16 @@
 // TODO: write code in this section to pass the tests. You will need to add new code
 // as well as modify some of the existing code
-const person = null
-const computer = null
+const person = {
+  name: 'Jane',
+  age: 32
+}
+const computer = {
+  form: 'laptop',
+  specs: {
+    memory: '16GB',
+    storage: '1TB'
+  }
+}
 
 // Do not edit this exported object
 module.exports = {

src/data-types/objects/object-keys.js

@@ -17,10 +17,20 @@ const isbn13 = '978-0132350884'
 // as well as modify some of the existing code
 
 // Set this to the book name
-const name = ''
+const name = book.name
 
 // Set this to the isbn 10 value
-const isbn10 = ''
+const isbn10 = book.isbn.isbn10
+
+book.category = 'Programming'
+
+book.pages = 464
+
+book.isbn.isbn13 = isbn13
+
+delete book.dimensions
+
+delete book.isbn.asin
 
 // Do not edit this exported object
 module.exports = {

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

@@ -22,10 +22,18 @@ const basket = {
 // as well as modify some of the existing code
 
 // Set this variable to the length of the baskets voucher codes array
-const numberOfVoucherCodes = null
+const numberOfVoucherCodes = basket.voucherCodes.length
 
 // Set this variable to the first element in of the baskets voucher codes array
-const firstVoucherCode = null
+const firstVoucherCode = basket.voucherCodes[0]
+
+basket.items[0].price = 2
+
+basket.items.push({
+  name: 'Oranges',
+  quantity: 4,
+  price: 0.75
+})
 
 // Do not edit this exported object
 module.exports = {

src/data-types/strings.js

@@ -6,16 +6,16 @@ const secondName = 'Smith'
 // TODO: Update the code using Javascript string operations and the variables above so that the tests pass.
 
 // Set this variable to firstName and secondName concatenated
-const fullName = null
+const fullName = `${firstName} ${secondName}`
 
 // Set this variable to the 10th character of the alphabet variable
-const tenthCharacterOfAlphabet = null
+const tenthCharacterOfAlphabet = alphabet.charAt(9)
 
 // Set this variable by calling a method on the alphabet variable to transform it to lower case
-const lowerCaseAlphabet = null
+const lowerCaseAlphabet = alphabet.toLowerCase()
 
 // Set this variable by using a property on the alphabet variable to get it's length
-const numberOfLettersInAlphabet = null
+const numberOfLettersInAlphabet = alphabet.length
 
 // do not edit the exported object.
 module.exports = {

src/demo/demo.js

@@ -4,11 +4,11 @@ const numTwo = 2
 let numThree = 0
 
 // TODO: Update numThree so the tests pass
-numThree = 0
+numThree = 5
 
 // TODO: Update the code below so that the tests pass
 
-const numOnePlusNumTwo = 0 // Set this variable to numOne plus numTwo
+const numOnePlusNumTwo = numOne + numTwo// Set this variable to numOne plus numTwo
 
 // do not edit this section
 module.exports = {