Tips til poker simulation i Beginning Javascript

sort_hand.js

// kræver at isHeigherThan() og isLowerThan() er defineret og virker.
function sortHand(hand) {
    hand.sort(function (a, b) {
        if (isHigherThan(a, b))
            return 1;
        else if (isLowerThan(a, b))
            return -1;
        else
            return 0;
    });
}

var containsPair = function (hand) {
    sortHand(hand);

    for(var i = 1; i < hand.length; i++)
    {
        if (hand[i].rank == hand[i-1].rank)  // fordi hånden er sorteret, kan vi antage at hvis to kort er ens (i rank) ligger de ved siden af hinanden
            return true;
    }
    return false;
};


// Returns true if the hand contains two-pair
var containsTwoPair = function (hand) {
    sortHand(hand);

    for(var i = 2; i < hand.length; i++)
    {
        if (hand[i-1].rank == hand[i-2].rank && containsPair(hand.slice(i, 5))) // her kan vi antage at vi kan springe de to første kort over, da de jo vil være det andet par, hvis der er to par.
            return true;
    }
    return false;
};

// This function should accept two card objects, and return true if
// the first card is higher than the second one. The ordering is based
// on the rank first. If the rank of the first card is bigger than the
// rank of the second, the first is always bigger. If the rank is the
// same, then the suit is the tie breaker in this order: clubs,
// diamonds, hearts, spades. In this case, clubs is the lowest suit,
// and spades is the highest. If they are the same rank and suit then
// this function should return false since they are equal.
var isHigherThan = function (firstCard, secondCard) {
    return ranks.indexOf(firstCard.rank) > ranks.indexOf(secondCard.rank)
        || ranks.indexOf(firstCard.rank) == ranks.indexOf(secondCard.rank)
            && suits.indexOf(firstCard.suit) > suits.indexOf(secondCard.suit);
};

// This function is similar (though not the opposite) of the isHigher
// function.
var isLowerThan = function (firstCard, secondCard) {
    return ranks.indexOf(firstCard.rank) < ranks.indexOf(secondCard.rank)
        || ranks.indexOf(firstCard.rank) == ranks.indexOf(secondCard.rank)
        && suits.indexOf(firstCard.suit) < suits.indexOf(secondCard.suit);
};

Tips til Henrik