有没有比这更简单的方法来计算扑克中的直线?

时间:2010-10-23 16:06:19

标签: javascript algorithm poker

我有一个算法来计算玩家的手牌是否持有德州扑克中的直线。它工作正常,但我想知道是否有一种更简单的方法来做不涉及数组/字符串转换等。

这是我所拥有的简化版本。假设玩家手牌是一个52元素的牌值阵列:

var rawHand = [1,0,0,0,0,0,0,0,0,0,0,0,0, //clubs
               0,0,0,0,0,0,0,0,0,0,0,0,0, //diamonds
               0,1,1,0,1,0,0,0,0,0,0,0,0, //hearts
               0,0,0,1,0,0,0,0,1,0,0,0,0];//spades

1表示该值位中的卡。上面的手有2个球杆,没有钻石,3颗心,4颗心和6颗心,5个黑桃和10个黑桃。现在我看着它找到一个笔直。

var suits = []; //array to hold representations of each suit

for (var i=0; i<4; i++) {
    var index = i*13;
    // commenting this line as I removed the rest of its use to simplifyy example
    //var hasAce = (rawHand[i+13]);

    //get a "suited" slice of the rawHand, convert it to a string representation
    //of a binary number, then parse the result as an integer and assign it to
    //an element of the "suits" array
    suits[i] = parseInt(rawHand.slice(index,index+13).join(""),2);
}

// OR the suits    
var result = suits[0] | suits[1] | suits[2] | suits[3];

// Store the result in a string for later iteration to determine
// whether straight exists and return the top value of that straight
// if it exists; we will need to determine if there is an ace in the hand
// for purposes of reporting a "low ace" straight (i.e., a "wheel"),
// but that is left out in this example
var resultString = result.toString(2);

//Show the result for the purposes of this example
alert("Result: " + resultString);

这里的诀窍是OR各种套装,所以只有一个2-Ace表示。我错误地认为必须有一种更简单的方法来做到这一点吗?

7 个答案:

答案 0 :(得分:2)

嗯,直线必须包括一个5或10,所以如果它没有一个或那个你可以先抛出手:

if (rawHand[3] || rawHand[16] || rawHand[29] || rawHand[42] ||
    rawHand[8] || rawHand[21] || rawHand[34] || rawHand[47]) {
  // do some more checks
} else {
  // not a straight
}

答案 1 :(得分:2)

您可以使用整数值作为卡值的位域,ace获得两个低点和高点。然后你将比特结束与十条可能的直道进行比较。

或者使用for-loop并检查连续五个数字 - 实际上它们都是一样的。

答案 2 :(得分:2)

您的代码几乎完成的所有工作都是类型转换。如果您只是将手以位格式存储起来(需要&gt; 32位类型),您可以执行以下操作:

var mask = 2^13 - 1; // this will zero out all but the low 13 bits
var suits = (rawHand | rawHand>>13 | rawHand>>26 | rawHand>>39) & mask;

使用单行循环的等价物将是:

var suits = [];
for(var i=0; i < 13; i++) {
   suits[i] = rawHand[i] || rawHand[i+13] || rawHand[i+26] || rawHand[i+39];
}

这更短,更容易理解。

使用逐位OR运算符转换为逐位表示形式所需的代码和CPU时间比使用逐位OR运算符要多。

答案 3 :(得分:2)

这个问题让我感兴趣。我最终走得太远了。并写了一个网页来计算任何一手牌。它可能不是最有效的,但确实有效。我只使用JavaScript(没有jQuery)来做到这一点。这是demo http://jsbin.com/izuto4/2/

以下是代码:

<html>
<head>
<script>
   // var myrawHand = [1,0,0,0,0,0,0,0,0,0,0,0,0, //clubs
   // 0,0,0,0,0,0,0,0,0,0,0,0,0, //diamonds
   // 0,1,1,0,1,0,0,0,0,0,0,0,0, //hearts
   // 0,0,0,1,0,0,0,0,0,0,0,0,0];//spades

    function getCardsInHand(rawHand) {
        var cardsInHand = new Array();
        var counter = 0;
        for (var i = 0; i < rawHand.length; i ++) {
            if (rawHand[i]) {
                cardsInHand[counter] = i;
                counter ++;
            }
        }
        return cardsInHand;
    }

    function cardsfiltered(rawHand) {
        var cards = getCardsInHand(rawHand)

        var cardsfiltered = new Array();
        for (var j = 0; j < cards.length; j ++){
            cardsfiltered[j] = cards[j] - (parseInt(cards[j] / 13) * 13);
        }
        cardsfiltered.sort();
        return {cards : cards, cardsfiltered : cardsfiltered};
    }

    function whatIsMyHand(rawHand) {
        var cardObject = cardsfiltered(rawHand);
        if (((cardObject.cards[0] == 0 && cardObject.cards[1] == 9)
                || (cardObject.cards[0] == 13 && cardObject.cards[1] == 22)
                || (cardObject.cards[0] == 26 && cardObject.cards[1] == 35)
                || (cardObject.cards[0] == 39 && cardObject.cards[1] == 48))
                && cardObject.cards[4] == cardObject.cards[3] + 1 &&
                cardObject.cards[3] == cardObject.cards[2] + 1 &&
                cardObject.cards[2] == cardObject.cards[1] + 1) {
            return "Royal Flush";
        }
        else if (cardObject.cards[4] == cardObject.cards[3] + 1 &&
                cardObject.cards[3] == cardObject.cards[2] + 1 &&
                cardObject.cards[2] == cardObject.cards[1] + 1 &&
                cardObject.cards[1] == cardObject.cards[0] + 1) {
            return "Straight Flush";
        }
        else if ((cardObject.cardsfiltered[1] == cardObject.cardsfiltered[2]
                && cardObject.cardsfiltered[2] == cardObject.cardsfiltered[3])
                && (cardObject.cardsfiltered[0] == cardObject.cardsfiltered[1]
                || cardObject.cardsfiltered[3] == cardObject.cardsfiltered[4])) {
            return "Four of a Kind";
        }
        else if ((cardObject.cardsfiltered[0] == cardObject.cardsfiltered[1]
                && cardObject.cardsfiltered[1] == cardObject.cardsfiltered[2]
                && cardObject.cardsfiltered[3] == cardObject.cardsfiltered[4])
                || (cardObject.cardsfiltered[0] == cardObject.cardsfiltered[1]
                && cardObject.cardsfiltered[2] == cardObject.cardsfiltered[3]
                && cardObject.cardsfiltered[3] == cardObject.cardsfiltered[4])) {
            return "Full House";
        }
        else if (parseInt(cardObject.cards[0] / 13) == parseInt(cardObject.cards[1] / 13)
                && parseInt(cardObject.cards[0] / 13) == parseInt(cardObject.cards[2] / 13)
                && parseInt(cardObject.cards[0] / 13) == parseInt(cardObject.cards[3] / 13)
                && parseInt(cardObject.cards[0] / 13) == parseInt(cardObject.cards[4] / 13)) {
            return "Flush";
        }
        else if ((cardObject.cardsfiltered[4] == cardObject.cardsfiltered[3] + 1
                && cardObject.cardsfiltered[3] == cardObject.cardsfiltered[2] + 1
                && cardObject.cardsfiltered[2] == cardObject.cardsfiltered[1] + 1
                && cardObject.cardsfiltered[1] == cardObject.cardsfiltered[0] + 1)
                || (cardObject.cardsfiltered[0] == 0
                && cardObject.cardsfiltered[1] == 10
                && cardObject.cardsfiltered[2] == 11
                && cardObject.cardsfiltered[3] == 12
                && cardObject.cardsfiltered[4] == 9)) {
            return "Straight";
        }
        else if ((cardObject.cardsfiltered[0] == cardObject.cardsfiltered[1]
                && cardObject.cardsfiltered[1] == cardObject.cardsfiltered[2])
                || (cardObject.cardsfiltered[1] == cardObject.cardsfiltered[2]
                && cardObject.cardsfiltered[2] == cardObject.cardsfiltered[3])
                || (cardObject.cardsfiltered[2] == cardObject.cardsfiltered[3]
                && cardObject.cardsfiltered[3] == cardObject.cardsfiltered[4])) {
            return "Three of a Kind";
        }
        else if ((cardObject.cardsfiltered[0] == cardObject.cardsfiltered[1]
                && (cardObject.cardsfiltered[2] == cardObject.cardsfiltered[3]
                || cardObject.cardsfiltered[3] == cardObject.cardsfiltered[4]))
                || (cardObject.cardsfiltered[1] == cardObject.cardsfiltered[2]
                && cardObject.cardsfiltered[3] == cardObject.cardsfiltered[4])) {
            return "Two Pair"
        }
        else if (cardObject.cardsfiltered[0] == cardObject.cardsfiltered[1]
                || cardObject.cardsfiltered[1] == cardObject.cardsfiltered[2]
                || cardObject.cardsfiltered[2] == cardObject.cardsfiltered[3]
                || cardObject.cardsfiltered[3] == cardObject.cardsfiltered[4]) {
            return "Pair";
        }
        else {
            return "High Card";
        }
    }
    var CardCheckCount = 0;
    function MaxCardCheck(element) {
        if (element.checked) {
            if (CardCheckCount < 5) {
                CardCheckCount++;
                return true;
            }
        }
        else {
            CardCheckCount--;
            return true;
        }
        element.checked = !element.checked;
        alert("You can only pick 5 cards.");
        return false;
    }

    function calculateHand() {
        var checkboxes = document.getElementsByTagName("input");
        var myrawHand = new Array();
        for (var i = 0, element; element = checkboxes[i]; i++) {
          myrawHand[parseInt(element.name)] = element.checked ? element.value : 0;
        }
        alert(whatIsMyHand(myrawHand));
    }
</script>
</head>
<body>
<table>
    <thead>
        <tr>
            <td>&nbsp;A</td>
            <td>&nbsp;2</td>
            <td>&nbsp;3</td>
            <td>&nbsp;4</td>
            <td>&nbsp;5</td>
            <td>&nbsp;6</td>
            <td>&nbsp;7</td>
            <td>&nbsp;8</td>
            <td>&nbsp;9</td>
            <td>10</td>
            <td>&nbsp;J</td>
            <td>&nbsp;Q</td>
            <td>&nbsp;K</td>
            <td>&nbsp;</td>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td><input name="0" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="1" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="2" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="3" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="4" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="5" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="6" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="7" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="8" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="9" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="10" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="11" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="12" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td>Clubs</td>
        </tr>
        <tr>
            <td><input name="13" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="14" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="15" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="16" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="17" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="18" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="19" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="20" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="21" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="22" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="23" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="24" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="25" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td>Diamonds</td>
        </tr>
        <tr>
            <td><input name="26" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="27" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="28" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="29" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="30" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="31" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="32" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="33" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="34" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="35" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="36" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="37" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="38" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td>Hearts</td>
        </tr>
        <tr>
            <td><input name="39" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="40" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="41" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="42" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="43" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="44" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="45" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="46" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="47" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="48" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="49" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="50" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td><input name="51" type="checkbox" value="1" onclick="MaxCardCheck(this);"/></td>
            <td>Spades</td>
        </tr>
    </tbody>
</table>
<button onclick="calculateHand()">Calculate Hand</button>
</body>
</html>

答案 4 :(得分:1)

不,这就像它得到的一样简单。我刚才看了扑克手评估,我认为最快的方法就是使用像你这样的方法。查看this site中的第一个结果。它使用按位运算来计算指针。

编辑:首先,我的意思是“Pokersource Poker-Eval Evaluator”。

答案 5 :(得分:0)

为什么不按等级对卡片进行排序,然后检查每个等级是否比前一个等级多一个。 “rank”是长度为5的数组,ACE = 1,2 = 2,...... J = 11,Q = 12,K = 13。 我认为这比这里介绍的其他方法更简单。

function isStraight( ranks) {
  ranks.sort();
  return (ranks[0] + 1 == ranks[1] || (ranks[0] == 1 && ranks[4] == 13)) &&
         (ranks[1] + 1 == ranks[2]) &&
         (ranks[2] + 1 == ranks[3]) &&
         (ranks[3] + 1 == ranks[4]);
}

答案 6 :(得分:0)

你可以使用SpecialK的7张牌和5张卡评估员here,并要求它排名。如果返回的等级介于5854和5863之间(包括两者)或介于7453和7462之间(包括两者),则您的手牌,无论是5张或7张牌,分别是或包含直线。

注意黑桃王牌用0表示,心中的王牌由1表示,到两个俱乐部用51表示。算法将“添加”你的牌并在一张小桌子中查找等级,占用9MB的RAM。它还会做更多,但是嘿......