Card Dealer Solution

dealer.ts

import { number, element } from "prop-types";

/**
 * Shuffle an array in place
 * @param a Array to shuffle
 */
function shuffleArray(a: any[]) {
  // Iterate over the array
  for (let i = a.length; i; i--) {
    // Get next index
    let j = Math.floor(Math.random() * i);
    // Swap positions
    [a[i - 1], a[j]] = [a[j], a[i - 1]];
  }
}

/**
 * Suit, CardNumber 
 * 0=clubs, 1=diamonds, 2=hearts, 3=spades
 */

 export enum Suit {
   Clubs,
   Diamonds,
   Hearts,
   Spades
 }

 export enum CardNumber {
   Ace,
   Two,
   Three,
   Four,
   Five,
   Six,
   Seven,
   Eight,
   Nine,
   Ten,
   Jack,
   Queen,
   King
 }

 type Card = [number, number];
export class Dealer {

  deck: Card[];
  constructor() {
    let suitIndex;
    let numberIndex;
    this.deck = [];
    
    for(suitIndex=0; suitIndex < 4; suitIndex++) {
      for(numberIndex=0; numberIndex < 13; numberIndex++) {
        this.deck.push([suitIndex, numberIndex]);
      }
    }

    shuffleArray(this.deck);
  }

  dealHand(num:number) {
    if(num > this.deck.length || num < 0) {
      throw Error("Invalid number of cards requested!");
    }

    return this.deck.splice(0, num);
  }

  getLength() : number {
    return this.deck.length;
  }

  readCard(card:Card) {
    return CardNumber[card[1]] + ' of ' + Suit[card[0]];
  }
}