drawmaha-0-48-dist.ts

function Deck() {
  const deck = new Array<string>()
  const suits = ["s", "h", "d", "c"]
  suits.forEach( su => {
    [2, 3, 4, 5, 6, 7, 8, 9, "T", "J", "Q", "K", "A"].forEach(num => {
      deck.push(num+su)
    })
  });
  return deck;
}

function getRank(card: string) : number {
  switch(card[0]) {
    case 'A':
      return 1;
    case '2':
      return 2
    case '3':
      return 3
    case '4':
      return 4
    case '5':
      return 5
    case '6':
      return 6
    case '7':
      return 7
    case '8':
      return 8
    case '9':
      return 9
    case 'T':
      return 10
    case 'J':
      return 0
    case 'Q':
      return 0
    case 'K':
      return 0
    default:
  } 
  throw(`Invalid case getRank: ${card}`)
}

function Shuffle(items: any[]) {
  const array = items;
  for (var i = array.length; 1 < i; i--) {
    const k = Math.floor(Math.random() * i);
    [array[k], array[i - 1]] = [array[i - 1], array[k]];
  }
  return array;
}

const iteration = 1_000_000
const histgram = [...Array(50)].map(() => 0);
for (let i=0; i<iteration; i++) {
  const deck = Shuffle(Deck());
  const rank = deck
    .slice(0, 5)
    .map(c => getRank(c))
    .reduce((acc, x)=> acc + x ,0)
  histgram[rank] += 1;
}

histgram.forEach( (x, i) => {
  console.log(`${i}, ${x}`)
});