javascript，是否有像isArray这样的isObject函数？ [英] javascript, is there an isObject function like isArray?

问题描述

可能重复：

检查该值是否为对象文字？

I我正在使用可以是null，0或json对象的输出。有了这个，我需要想出一种方法来确定输出是否确实是一个真实的对象。但我找不到任何能给我一个明确答案的答案，如果javascript功能中有类似的东西。如果没有，否则我可以检测到这是否是一个对象？

I am working with an output that can be either null, 0, or a json object. And with that I need to come up with a means of determining if that output is indeed a real object. But I can't find anything that gives me a definitive answer as to if there is something like that in the javascript functionality or not. If there isn't is there a means otherwise that I can detect if this is an object?

推荐答案

你可以使用 typeof 运算符。

You can use typeof operator.

if( (typeof A === "object") && (A !== null) )
{
    alert("A is object");
}

请注意，因为 typeof new Number（1）= =='object'而 typeof Number（1）==='number'; 应避免使用第一种语法。

Note that because typeof new Number(1) === 'object' while typeof Number(1) === 'number'; the first syntax should be avoided.

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