JavaScript检查json输出是否为空 [英] Javascript check json output is empty

问题描述

如果我在json中有这样的数据:

If I have data in json like this :

{"items":[{"id":"2049","channel_code":"HBD","channel_name":"HBO HD"}]}

如果您将我的数据搜索到服务器，则找不到这样的结果:

And if you search my data to the server could not find results like this :

{"items":[]}

上面的输出，如何读取我的数据不存在或为空?

Of output as above, how do I read that my data does not exist or is empty?

我已经写了一些代码，但是没有找到想要的结果.

I have written some code that I got but have not found the results I want.

此代码:

var data = { Name: "John Doe", Age: 25, Address: null, CityState: "Denver, CO" };
for (member in data) {
if (data[member] != null)
    //Do something
}

或

if (myObject == '') {
   alert('this object is empty');
}

也许有人可以帮助我找到解决这个问题的方法. 请帮助

Maybe someone can help me find a way out of this example. Please help

推荐答案

要检查数组是否为空，只需使用相应的

To check whether your array is empty, just use the respective length property:

if ( data['items'].length < 1 ) {
   // it's empty
}

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