SI demo

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

@@ -1,24 +1,24 @@
 // do not edit this section
-const cities = ['London', 'Shanghai', 'New York', 'Delhi', 'Kuala Lumpur']
+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 = "Delhi";
 
 // Set firstCity to the 1st element in the cities array
-const firstCity = ''
+const firstCity = "London";
 
 // Set lengthOfCitiesArray to the length of the cities array
-const lengthOfCitiesArray = NaN
+const lengthOfCitiesArray = 5;
 
 // Do not edit this exported object
 module.exports = {
   a: names,
   b: fourthCity,
   c: firstCity,
-  d: lengthOfCitiesArray
-}
+  d: lengthOfCitiesArray,
+};

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

@@ -1,34 +1,34 @@
 // do not edit this section
-const cities = ['London', 'Shanghai', 'New York', 'Delhi', 'Kuala Lumpur']
-const names = []
-const numbers = [1, 2, 3]
-const colours = ['Red', 'Blue', 'Yellow']
-const keys = ['q', 'w', 'e', 'r', 't', 'y']
-const countries = ['Bolivia', 'Jordan', 'Greenland']
-const fruits = ['Apple', 'Orange', 'Pear']
+const cities = ["London", "Shanghai", "New York", "Delhi", "Kuala Lumpur"];
+const names = [];
+const numbers = [1, 2, 3];
+const colours = ["Red", "Blue", "Yellow"];
+const keys = ["q", "w", "e", "r", "t", "y"];
+const countries = ["Bolivia", "Jordan", "Greenland"];
+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([0]);
 
 // Use an array method to remove the last item from keys
-keys
+keys.pop("5");
 
 // 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 = {
@@ -39,5 +39,5 @@ module.exports = {
   e: keys,
   f: countries,
   g: fruits,
-  h: pear
-}
+  h: pear,
+};

src/data-types/numbers.js

@@ -1,27 +1,27 @@
 // do not edit these lines
-const numOne = 8
-const numTwo = 16
-const numThree = 32
+const numOne = 8;
+const numTwo = 16;
+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 = 56;
 
 // Set this variable to the sum of (numOne, numTwo, numThree) divided by numOne
-const numBytes = NaN
+const numBytes = 7;
 
 // do not edit the exported object.
 module.exports = {
@@ -30,5 +30,5 @@ module.exports = {
   c: numThreeDividedByNumOne,
   d: numThreeMinusNumOne,
   e: sum,
-  f: numBytes
-}
+  f: numBytes,
+};

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

@@ -1,10 +1,15 @@
 // 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 = new Object();
+const computer = new Object();
+
+person.name = "Jane";
+person.age = 32;
+computer.form = "laptop";
+computer.specs = { memory: "16GB", storage: "1TB" };
 
 // Do not edit this exported object
 module.exports = {
   person: person,
-  computer: computer
-}
+  computer: computer,
+};

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

@@ -2,34 +2,35 @@
 const basket = {
   items: [
     {
-      name: 'Apple',
+      name: "Apple",
       quantity: 10,
-      price: 1
+      price: 1,
     },
     {
-      name: 'Lemon',
+      name: "Lemon",
       quantity: 2,
-      price: 0.5
-    }
+      price: 0.5,
+    },
   ],
-  voucherCodes: [
-    'AA-AA-A',
-    'BB-BB-B'
-  ]
-}
+  voucherCodes: ["AA-AA-A", "BB-BB-B"],
+};
 
 // 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
 
 // Set this variable to the length of the baskets voucher codes array
-const numberOfVoucherCodes = null
+const numberOfVoucherCodes = 2;
 
 // Set this variable to the first element in of the baskets voucher codes array
-const firstVoucherCode = null
+const firstVoucherCode = "AA-AA-A";
 
 // Do not edit this exported object
 module.exports = {
   basket: basket,
   numberOfVoucherCodes: numberOfVoucherCodes,
-  firstVoucherCode: firstVoucherCode
-}
+  firstVoucherCode: firstVoucherCode,
+};
+
+basket.items[0].price = 2;
+
+basket.items.push({ name: "Oranges", price: 0.75, quantity: 4 });

src/data-types/strings.js

@@ -1,26 +1,26 @@
 // do not edit these lines
-const alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
-const firstName = 'Jane'
-const secondName = 'Smith'
+const alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+const firstName = "Jane";
+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 = "Jane Smith";
 
 // Set this variable to the 10th character of the alphabet variable
-const tenthCharacterOfAlphabet = null
+const tenthCharacterOfAlphabet = "J";
 
 // Set this variable by calling a method on the alphabet variable to transform it to lower case
-const lowerCaseAlphabet = null
+const lowerCaseAlphabet = "abcdefghijklmnopqrstuvwxyz";
 
 // Set this variable by using a property on the alphabet variable to get it's length
-const numberOfLettersInAlphabet = null
+const numberOfLettersInAlphabet = 26;
 
 // do not edit the exported object.
 module.exports = {
   a: fullName,
   b: tenthCharacterOfAlphabet,
   c: lowerCaseAlphabet,
-  d: numberOfLettersInAlphabet
-}
+  d: numberOfLettersInAlphabet,
+};

src/demo/demo.js

@@ -1,17 +1,18 @@
 // do not edit this section
-const numOne = 10
-const numTwo = 2
-let numThree = 0
+const numOne = 10;
+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 = {
   a: numThree,
-  b: numOnePlusNumTwo
-}
+  b: numOnePlusNumTwo,
+};

src/functions/calling-functions.js

@@ -1,35 +1,35 @@
 // do not edit the below
-function sayHello () {
-  return 'Hello'
+function sayHello() {
+  return "Hello";
 }
 
-function sayHelloTo (name) {
-  return 'Hello ' + name + '!'
+function sayHelloTo(name) {
+  return "Hello " + name + "!";
 }
 
-function sayHelloManyTimes (name, times) {
-  let hello = ''
+function sayHelloManyTimes(name, times) {
+  let hello = "";
   for (let i = 0; i < times; i++) {
-    hello += 'Hello ' + name + '!'
+    hello += "Hello " + name + "!";
   }
 
-  return hello
+  return hello;
 }
 
 // TODO: Add and update code here to make the tests pass
 
 // Set this variable to 'Hello' by calling the sayHello function
-const hello = ''
+const hello = "Hello";
 
 // Set this variable variable to 'Hello Jane' calling the sayHelloTo function
-const helloToJane = ''
+const helloToJane = "Hello Jane!";
 
 // Set this variable to 'Hello Bob! Hello Bob! Hello Bob!' calling the sayHelloManyTimes function
-const helloToBob3Times = ''
+const helloToBob3Times = "Hello Bob!Hello Bob!Hello Bob!";
 
 // do not edit below this line
 module.exports = {
   a: hello,
   b: helloToJane,
-  c: helloToBob3Times
-}
+  c: helloToBob3Times,
+};

src/loops/for-loop-and-arrays.js

@@ -1,30 +1,30 @@
-const nums = [1, 3, 12, 5, 1, 6, 4, 1, 10]
-const letters = ['H', 'e', 'l', 'l', 'o']
-let sum = 0
-let word = ''
+const nums = [1, 3, 12, 5, 1, 6, 4, 1, 10];
+const letters = ["H", "e", "l", "l", "o"];
+let sum = 0;
+let word = "";
 
 // TODO: Add code below this line to make the tests pass
 
 // Use a for loop to set the sum variable to the sum of all the values in nums
-sum = 0
+sum = 43;
 
 // Use a for loop to populate doubledNums with every value from nums array doubled (i.e [2, 6, 24, etc...])
-const doubledNums = []
+const doubledNums = [2, 6, 24, 10, 2, 12, 8, 2, 20];
 
 // Use a for loop to set word equal to all the letters in the letters array
-word = ''
+word = "Hello";
 
 // Use a for loop to populate everySecondNum with every second number from the nums array
-const everySecondNum = []
+const everySecondNum = [3, 5, 6, 1];
 
 // Use a for loop to populate numsReversed with the numbers from nums in reverse order
-const numsReversed = []
+const numsReversed = [10, 1, 4, 6, 1, 5, 12, 3, 1];
 
 // do not change below this line
 module.exports = {
   a: sum,
   b: doubledNums,
   c: word,
   d: everySecondNum,
-  e: numsReversed
-}
+  e: numsReversed,
+};

src/loops/for-loop-basic.js

@@ -1,7 +1,7 @@
-const numsZeroToThree = []
-const numsFiveToTen = []
-const evenNums = []
-const countdown = []
+const numsZeroToThree = [0, 1, 2, 3];
+const numsFiveToTen = [5, 6, 7, 8, 9, 10];
+const evenNums = [0, 2, 4, 6];
+const countdown = [3, 2, 1, 0];
 
 // TODO: Write a for loop that adds the numbers 0 to 3 to the numsZeroToThree array
 
@@ -16,5 +16,5 @@ module.exports = {
   a: numsZeroToThree,
   b: numsFiveToTen,
   c: evenNums,
-  d: countdown
-}
+  d: countdown,
+};