A simple JavaScript blackjack game, coded as part of a Codecademy course. The player can "hit" and be dealt another card, or "stop". The player plays against a computer opponent. Highest hand 21 and under wins.
function Card(s, n) {
var suit = s;
var number = n;
this.getNumber = function() {
return number;
};
this.getSuit = function() {
return suit;
};
this.getValue = function() {
if (number > 10)
return 10;
else if (number === 1)
return 11;
else
return number;
};
}
var deal = function() {
var suit = Math.floor(Math.random() * 4) + 1;
var number = Math.floor(Math.random() * 13) + 1;
var myCard = new Card(suit, number);
return myCard;
};
function Hand() {
var cards = [deal(), deal()];
this.getHand = function() {
return cards;
};
this.score = function() {
var myScore = 0;
for (var i = 0; i < cards.length; i++)
myScore += cards[i].getValue();
for (var a = 0; a < cards.length && myScore > 21; a++) {
if (cards[a].getValue() === 11)
myScore -= 10;
}
return myScore;
};
this.printHand = function() {
var myHand = "";
var numberArray = [];
var suitArray = [];
for (var i = 0; i < cards.length; i++) {
switch(cards[i].getNumber()) {
case 1:
numberArray.push("ace");
break;
case 11:
numberArray.push("jack");
break;
case 12:
numberArray.push("queen");
break;
case 13:
numberArray.push("king");
break;
default:
numberArray.push(cards[i].getNumber());
}
switch(cards[i].getSuit()) {
case 1:
suitArray.push("spades");
break;
case 2:
suitArray.push("hearts");
break;
case 3:
suitArray.push("diamonds");
break;
case 4:
suitArray.push("clubs");
break;
}
myHand += numberArray[i] +" of " +suitArray[i];
if (i < cards.length - 1)
myHand += ", ";
}
/*
for (var i = 0; i < cards.length; i++) {
myHand += cards[i].getNumber() +" of suit " +cards[i].getSuit();
if (i < cards.length - 1)
myHand += ", ";
}*/
return myHand;
};
this.hitMe = function() {
cards.push(deal());
};
}
var playAsDealer = function() {
var dealerHand = new Hand();
while (dealerHand.score() < 17) {
dealerHand.hitMe();
}
return dealerHand;
};
var playAsUser = function() {
var userHand = new Hand();
var decision = confirm("Welcome to the Blackjack Palace.\nYour hand is: "+ userHand.printHand() + ". Hit?");
while(decision) {
userHand.hitMe();
decision = confirm("Your hand is: "+ userHand.printHand() +". Hit?");
}
return userHand;
};
var declareWinner = function(userHand, dealerHand) {
if (userHand.score() > 21) {
if (dealerHand.score() > 21)
return "You tied!";
else
return "You lose!";
}
else if (dealerHand.score() > 21)
return "You win!";
else {
if (userHand.score() > dealerHand.score())
return "You win!";
else if (userHand.score() === dealerHand.score())
return "You tied!";
else if (userHand.score() < dealerHand.score())
return "You lose!";
}
};
var playGame = function() {
var userHand = playAsUser();
var dealerHand = playAsDealer();
console.log(declareWinner(userHand, dealerHand));
console.log("\nScores:");
if (userHand.score() > 21)
console.log("User: " +userHand.score() +" (went over)");
else
console.log("User: " +userHand.score());
if (dealerHand.score() > 21)
console.log("Dealer: " +dealerHand.score() +" (went over)");
else
console.log("Dealer: " +dealerHand.score());
console.log("\nYour hand:\n" +userHand.printHand());
console.log("Dealer's hand:\n" +dealerHand.printHand());
};
playGame();