gistfile1.txt

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

// 2. Class implementing IMagicalItem
class MagicalItem implements IMagicalItem {
  name: string
  type: string
  powerLevel: number
  isRare: boolean

  constructor (
    name: string,
    type: string,
    powerLevel: number,
    isRare: boolean
  ) {
    this.name = name
    this.type = type
    this.powerLevel = powerLevel
    this.isRare = isRare
  }

  displayInfo () {
    console.log('name', this.name)
    console.log('type', this.type)
    console.log('powerLevel', this.powerLevel)
    console.log('isRare', this.isRare)
  }
}

// Function to compare power levels of two items
function comparePower (item1: IMagicalItem, item2: IMagicalItem) {
  if (item1.powerLevel > item2.powerLevel) {
    return item1.name
  }
  return item2.name
}

const a = new MagicalItem('a', 'type1', 9001, false)
const b = new MagicalItem('b', 'type1', 9002, true)



// Generic class for inventory
class Inventory <T> {
  items: T[] = []

  add (item: T) {
    this.items.push(item)
  }

  getAll() {
    return this.items
  }

  // getProperty <K extends keyof T> (item: T, key: K) {
  getProperty (item: T, key: keyof T) {
    return item[key]
  }
}

const stringInventory = new Inventory<string>()
stringInventory.add('hello')
stringInventory.add('goodybe')
const stringResult = stringInventory.getAll()
const stringProperty = stringInventory.getProperty('hi', 'length')
console.log('hi.length', stringProperty)

const numberInventory = new Inventory<number>()
numberInventory.add(1)
const numberResult = numberInventory.getAll()

// Example items



// Create inventory and add items
const magicInventory = new Inventory<IMagicalItem>
magicInventory.add(a)
magicInventory.add(b)

// Display all item info
const items = magicInventory.getAll()
console.log('items', items)


// Compare power levels
const powerful = comparePower(a, b)
console.log('powerful', powerful)

// Access property using keyof
const bRare = magicInventory.getProperty(b, 'isRare')
console.log('bRare', bRare)