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In: Computer Science

javascript BlackJack i made a blackjack game, the code is below //this method will return a...

javascript BlackJack

i made a blackjack game, the code is below


//this method will return a shuffled deck

function shuffleDeck() {

//this will store array fo 52 objects

const decks = []

const suits = ['Hearts', 'Clubs', 'Diamonds', 'Spades']

const values = ['Ace', 'King', 'Queen', 'Jack', 'Ten', 'Nine', 'Eight', 'Seven', 'Six', 'Five', 'Four', 'Three', 'Two', 'One']

//run a loop till 52 times

for (let i = 0; i < 52; i++) {

//push a random item

decks.push({ suit: suits[Math.floor(Math.random() * suits.length)], value: values[Math.floor(Math.random() * values.length)] })

}

return decks

}

//function that will draw four cards form the deck

function draw(decks) {

return {

player: [decks[0], decks[1]],

computer: [decks[2], decks[3]]

}

}

//first shuffle the deck

const shuffled = shuffleDeck()

console.log((shuffled))

//now draw the card

const drawn = draw(shuffled)

console.log("\n\nDrawn Cards :" ,(drawn))

i want to make a node application that will listen for user input. this is what i have so far for it.

function startGame () {
let input;
input = prompt("Welcome to Blackjack. Do you want to play? (Y)es or (N)o").toUpperCase();
if (input == 'Y') {}
}

i am stuck on how to finish the startGame Function.

Solutions

Expert Solution

Simple HTML Code for the front page and th Buttons:-

<!DOCTYPE html>

<html>

  <head>

    <link rel="stylesheet" href="style.css">

  </head>

  <body>

    <h1>WELCOME TO BLACKJACK</h1>

    <h4>DO YOU WANT TO PLAY?</h4>

    <p id="text-area">Welcome to Blackjack!</p>

    <button id="new-game-button">Start Game!</button>

    <button id="hit-button">Hit!</button>

    <button id="stay-button">Stay</button>

    

    <script src="script.js"></script>

  </body>

</html>

Javascript Code to connect and run the Game:-

let suits = ['Hearts', 'Clubs', 'Diamonds', 'Spades'];

let values = ['Ace', 'King', 'Queen', 'Jack',

  'Ten', 'Nine', 'Eight', 'Seven', 'Six',

  'Five', 'Four', 'Three', 'Two', 'One'

];

let textArea = document.getElementById('text-area');

let newGameButton = document.getElementById('new-game-button');

let hitButton = document.getElementById('hit-button');

let stayButton = document.getElementById('stay-button');

hitButton.style.display = 'none';

stayButton.style.display = 'none';

let gameStart = false,

  gameOver = false,

  playWon = false,

  dealerCards = [],

  playerCards = [],

  dealerScore = 0,

  playerScore = 0,

  deck = [];

newGameButton.addEventListener('click', function() {

  gameStarted = true;

  gameOver = false;

  playerWon = false;

  deck = createDeck();

  shuffleDeck(deck);

  dealerCards = [getNextCard(), getNextCard()];

  playerCards = [getNextCard(), getNextCard()];

  newGameButton.style.display = 'none';

  hitButton.style.display = 'inline';

  stayButton.style.display = 'inline';

  showStatus();

})

function createDeck() {

  let deck = []

  for (let suitIdx = 0; suitIdx < suits.length; suitIdx++) {

    for (let valueIdx = 0; valueIdx < values.length; valueIdx++) {

      let card = {

        suit: suits[suitIdx],

        value: values[valueIdx]

      }

      deck.push(card);

    }

  }

  return deck;

}

function shuffleDeck(deck){

  for(let i=0; i<deck.length; i++)

  {

    let swapIdx = Math.trunc(Math.random() *deck.length);

    let tmp = deck[swapIdx];

    deck[swapIdx] = deck[i];

    deck[i] = tmp;

  }

}

hitButton.addEventListener('click', function(){

  playerCards.push(getNextCard());

  checkForEndOfGame();

  showStatus();

});

stayButton.addEventListener('click', function(){

  gameOver = true;

  checkForEndOfGame();

  showStatus();

});

function checkForEndOfGame(){

  updateScores();

  

  if(gameOver){

    while(dealerScore<playerScore &&

          playerScore <=21 &&

          dealerScore <=21){

            dealerCards.push(getNextCard());

            updateScores();

    }

  }

    

    if(playerScore>21){

      playerWon=false;

      gameOver = true;

    }

    

    else if(dealerScore>21){

      playerWon = true;

      gameOver = true;

    }

    

    else if(gameOver){

      if(playerScore>dealerScore){

        playerWon = true;

      }

      else{

        playerWon = false;

      }

    }

}

function getCardString(card) {

  return card.value + " of " + card.suit;

}

function getCardNumericValue(card){

  switch(card.value){

    case 'Ace':

      return 1;

    case 'Two':

      return 2;

    case 'Three':

      return 3;

    case 'Four':

      return 4;

    case 'Five':

      return 5;

    case 'Six':

      return 6;

    case 'Seven':

      return 7;

    case 'Eight':

      return 8;

    case 'Nine':

      return 9;

    default:

      return 10;

  }

}

function showStatus()

{

  if(!gameStarted)

  {

    textArea.innerText = 'Welcome to Blackjack!';

    return;

  }

  

  let dealerCardString = '';

  for(let i=0; i<dealerCards.length; i++)

  {

    dealerCardString += getCardString(dealerCards[i]) + '\n';

  }

  let playerCardString='';

  for(let i=0; i<playerCards.length; i++)

  {

    playerCardString += getCardString(playerCards[i]) + '\n';

  }

  

  updateScores();

  

  textArea.innerText = 'Dealer has:\n' +

                        dealerCardString +

                        '(score: ' + dealerScore + ')\n\n' +

                        

                        'Player has:\n' +

                        playerCardString +

                        '(score: ' + playerScore + ')\n\n';

                        

  if(gameOver){

    if(playerWon)

    {

      textArea.innerText += "YOU WIN!";

    }

    else{

      textArea.innerText += "DEALER WINS";

    }

    newGameButton.style.display = 'inline';

    hitButton.style.display = 'none';

    stayButton.style.display = 'none';

    

  }

}

function getScore(cardArray){

  let score = 0;

  let hasAce = false;

  for(let i=0; i<cardArray.length; i++){

    let card = cardArray[i];

    score += getCardNumericValue(card);

    if(card.value == 'Ace'){

      hasAce = true;

    }

    

    if(hasAce && score+10<=21){

      return score+10;

    }

  }

   return score;

}

function updateScores(){

  dealerScore = getScore(dealerCards);

  playerScore = getScore(playerCards);

}


function getNextCard() {

  return deck.shift();

}

Summary:-Run the code mentioned above and your Blackjack Game will be ready.You can style the Game according to your need so didnot provide the CSS part.

venereology answered 10 months ago
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