davidystephenson

const message: string = 'goodbye' 
const count: number = Math.random()
const accurate: boolean = count > 0.5
const teacher: 'David Y. Stephenson' = 'David Y. Stephenson'
console.log(teacher.length)

const a = 1 as number
const b: any = 2
const c = a + b

davidystephenson

enum Subject {
  Js = 'JavaScript',
  Html = 'Hyper Text Markup Language',
  Css = 'Cascading Style Sheets',
  React = 'React'
}

function describeLearning (subject: Subject) {
  console.log('Today I learned about:', subject)
}

davidystephenson

// Type definition for wand using tuple
type Wand = [core: string, length: number, material: string]

// Enum for house names
enum House {
  Gryffindor = 'Gryffindor',
  Slytherin = 'Slytherin'
}

// Type for character

davidystephenson

// 1. Interface for Magical Item
interface IMagicalItem {
  name: string
  type: string
  powerLevel: number
  isRare: boolean
}

// 2. Class implementing IMagicalItem
class MagicalItem implements IMagicalItem {

davidystephenson

// Question 1: Anonymous Function
// Write an anonymous function that takes two numbers as parameters and returns their sum.

var add = function (x, y) {
  return x + y
}

console.log(add(10, 5))

console.log("\n-------------------------------------------------\n");

davidystephenson

// Question 1: Anonymous Function
// Write an anonymous function that takes two numbers as parameters and returns their sum.

var add = function (x, y) {
  return x + y
}

console.log(add(10, 5))

console.log("\n-------------------------------------------------\n");

davidystephenson

// Question 1: Anonymous Function
// Write an anonymous function that takes two numbers as parameters and returns their sum.

var add = function (x, y) {
  return x + y
}

console.log(add(10, 5))

console.log("\n-------------------------------------------------\n");

davidystephenson

// 6.  IIFE Returning a Value
// Write an IIFE that returns the square of a number and assign the result to a variable.

var result = ((x) => x * x)(5)
console.log(result)

davidystephenson

// 7. Arrow functions
// Define an arrow function that returns the cube of a number and assign the returned value to a variable.

var cube = (x) => x * x * x
var result = cube(5)
console.log(result)

davidystephenson

// 8. Arrow Function
// Write a function to print a right angle triangle of stars. Use arrow function which takes a number as a parameter that represents the number of lines in the triangle.

// *
// **
// ***

var triangle = (x) => {
  for (var i = 1; i <= x; i++) {
    var star = '*'