Question

我有一个带卡作为对象的数组：

$(document).ready(function() {
    var totalPlayer = 12;    
var cards = [
            {"card": 2, "value": 2, "suit": "d"}, 
            {"card": 2, "value": 2, "suit": "c"}, 
            {"card": 2, "value": 2, "suit": "h"}, 
            {"card": 2, "value": 2, "suit": "s"}, 
            {"card": 3, "value": 3,...
            {"card": "a", "value": 11, "suit": "s"}];
$('#butStart').click(processIt);

循环：

function processIt() {
    for (var i = 0; i < cards.length; i++) {
        if (cards[i].card === "a" && totalPlayer > 11) {
            cards[i].value = 1;
        }
        else if (cards[i].card === "a") {
            cards[i].value = 11;
        }
    }
    alert(cards[50].value + cards[50].card);
}

我无法弄清楚为什么我收到错误消息“无法读取未定义的属性'卡'

Answer 1

因为你的JSON中没有51个项目......？

Answer 2

你必须引用你的所有数据，我已尝试过它，它就像一个魅力：

var cards = [
            {"card": "2", "value": "2", "suit": "d"}, 
            {"card": "2", "value": "2", "suit": "c"}, 
            {"card": "2", "value": "2", "suit": "h"}, 
            {"card": "2", "value": "2", "suit": "s"}, 
            {"card": "3", "value": "3",...
            {"card": "a", "value": "11", "suit": "s"}];

此外，您需要将数据传递给您的函数：

$('#butStart').click(processIt(cards));
function processIt(cards) {...}

for循环无法在数组中找到对象值

2 个答案: