Javascript ASK: javascript – Finding out how many times an array element appears

Friday, November 16, 2012

javascript – Finding out how many times an array element appears

I am new to JavaScript, I have been learning and practicing for about 3 months and hope I can get some help on this topic. I\’m making a poker game and what I\’m trying to do is determine whether i have a pair, two pairs, three of a kind, four of a kind or a full house.

For instance, in [1, 2, 3, 4, 4, 4, 3], 1 appears one time, 4 appears three times, and so on.

How could I possibly ask my computer to tell me how many times an array element appears?


<script type=\"text/javascript\">
        var deck = [];
        var cards = [];
        var convertedcards = [];
        var kinds = [];
        var phase = 1;
        var displaycard = [];
        var options = 0;
        var endgame = false;

        // Fill Deck //
        for(i = 0; i < 52; i++){
            deck[deck.length] = i;          
        }

        // Distribute Cards //
        for(i = 0; i < 7; i++){
            cards[cards.length] = Number(Math.floor(Math.random() * 52));
            if(deck.indexOf(cards[cards.length - 1]) === -1){
                cards.splice(cards.length - 1, cards.length);
                i = i - 1;
            }else{
                deck[cards[cards.length - 1]] = \"|\";
            }
        }

        // Convert Cards //
        for(i = 0; i < 7; i++){
            convertedcards[i] = (cards[i] % 13) + 1;
        }


        // Cards Kind //
        for(i = 0; i < 7; i++){
            if(cards[i] < 13){
                kinds[kinds.length] = \"H\";
            }else if(cards[i] < 27 && cards[i] > 12){
                kinds[kinds.length] = \"C\";
            }else if(cards[i] < 40 && cards[i] > 26){
                kinds[kinds.length] = \"D\";
            }else{
                kinds[kinds.length] = \"S\";
            }
        }

        // Card Display //
        for(i = 0; i < 7; i++){
            displaycard[i] = convertedcards[i] + kinds[i];
        }
        convertedcards = [1,1,1,1,3,3,3];
        // Hand Strenght //
        var handstrenght = function(){
            var pairs = [];
            for(i = 0, a = 1; i < 7; a++){
                if(convertedcards[i] === convertedcards[a] && a < 7 && convertedcards[i] != \"|\"){
                    pairs[pairs.length] = convertedcards[i];
                    convertedcards[a] = \"|\";
                    alert(pairs);
                }else if(a > 6){
                i = i + 1;
                a = i;
            }
            }
        };
        while(endgame === false){
            if(phase === 1){
                options = Number(prompt(\"Your hand: \" + displaycard[0] + \" \" + displaycard[1] + \"\\n\\n\" + \"1. Check\" + \"\\n\" + \"2. Fold\"));
            }else if(phase === 2){
                options = Number(prompt(\"Your hand: \" + displaycard[0] + \" \" + displaycard[1] + \"\\n\\n\" + displaycard[2] + \" \" + displaycard[3] + \" \" + displaycard[4] + \"\\n\\n\" + \"1. Check\" + \"\\n\" + \"2. Fold\"));
            }else if(phase === 3){
                options = Number(prompt(\"Your hand: \" + displaycard[0] + \" \" + displaycard[1] + \"\\n\\n\" + displaycard[2] + \" \" + displaycard[3] + \" \" + displaycard[4] + \" \" + displaycard[5] + \"\\n\\n\" + \"1. Check\" + \"\\n\" + \"2. Fold\"));
            }else if(phase === 4){
                options = Number(prompt(\"Your hand: \" + displaycard[0] + \" \" + displaycard[1] + \"\\n\\n\" + displaycard[2] + \" \" + displaycard[3] + \" \" + displaycard[4] + \" \" + displaycard[5] + \" \" + displaycard[6] + \"\\n\\n\" + \"1. Check\" + \"\\n\" + \"2. Fold\"));
            }
            switch(options){
                case 1:
                        if(phase === 5){
                            handstrenght();
                            endgame = true;
                        }else{
                            phase++;
                        }
                        break;
                case 2:
                        endgame = true;
                        break;
                default:
                        endgame = true;
                        break;
            }
        }


    </script>