检测对象是否为空 [英] Detect if object is empty or not

问题描述

我正在尝试检测对象是否有数据，但这似乎不起作用:

I'm trying to detect if an object has data or not but this doesn't seem to work:

if(item.sellers.length != 0) {

完整代码:

.each(response, function(i, item) {
       if(item.sellers.length != 0) {
            $.each(item.sellers, function(index, value) {
              $('#modal-table tbody').append("<tr><td></td><td><strong>Seller:</strong></td><td>" + index + "</td><td>"+ value + "</td>");
            });
       });

json如下:

response = 
    {
        "5": {
            "name": "surgeon bueno",
            "country": "Spain",
            "antiquity": "renewal",
            "amount": "2686.97 USD",
            "sellers": {
                "Frank": "2690.58 USD",
                "Bob": "1690.58 USD",
            }
        },
        "11": {
            "name": "Alex Lloyd",
            "country": "American Samoa",
            "antiquity": "new client",
            "amount": "0.0 USD"
        },
        "12": {
            "name": "alex lloyd",
            "country": "Aruba",
            "antiquity": "new client",
            "amount": "0.0 USD"
        }
    }

推荐答案

使用hasOwnProperty:

if(item.hasOwnProperty("sellers")) {
    // each loop
}

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