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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 9 months ago
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