如何测试一个空的JavaScript对象? - How do I test for an empty JavaScript object?

问题:

After an AJAX request, sometimes my application may return an empty object, like: 在AJAX请求以后,有时个人应用程序可能返回一个空对象,例如: app

var a = {};

How can I check whether that's the case? 如何检查状况呢? 测试


解决方案:

参考一: https://stackoom.com/question/2qsN/如何测试一个空的JavaScript对象
参考二: https://oldbug.net/q/2qsN/How-do-I-test-for-an-empty-JavaScript-object
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