如何使用 JavaScript 或 jQuery 清除 JSON 对象

How to clear JSON object using JavaScript or jQuery

提问by PSR

I have a JSON object as follows. After sending ajax call I want to clear this. How I can do?

我有一个 JSON 对象，如下所示。发送 ajax 调用后，我想清除它。我能怎么办？

var cfamFwdDtls = {
    cndtwizid: [],
    clientIdsInstnIds: [],
    positioncd: '',
    positionCnt: '',
    rcrtrInstnId: '',
    positionLocation: {
        cntryIdFrCndt: '',
        stateIdFrCndt: '',
        zipIdFrCndt: '',
        cityIdFrCndt: ''
    },
    searchPstnSkill: []
};

回答by Shawn31313

Just reset the variable back to {};

只需将变量重置回{};

cfamFwdDtls = {}; 
// or
cfamFwdDtls = new Object; 

And this is the moment when you start thinking: "Whoooa, I can't believe it's that easy."

这就是你开始思考的时刻：“哇哦，我简直不敢相信这么容易。”

In special cases:

特殊情况下：

You could take the "long" way:

你可以走“长”路：

for (var key in cfamFwdDtls) {
    delete cfamFwdDtls[key];
}

For your purposes, this is not extremely practical, but in case you would like to be a little more selective, looping is the way to go.

就您的目的而言，这不是非常实用，但如果您想更具选择性，循环是可行的方法。

回答by Nathan

for (var entry in cfamFwdDtls) delete cfamFwdDtls[entry];

for (var entry in cfamFwdDtls) delete cfamFwdDtls[entry];

If you simply reassign to {}, you'll get in trouble if there are multiple references to your object. Also may face garbage collection issues.

如果您简单地重新分配给{}，那么如果您的对象有多个引用，您就会遇到麻烦。也可能面临垃圾收集问题。

回答by Sonu Sindhu

there is alternative for this if you want to remove object.Something like this

如果您想删除对象，还有其他选择。类似这样的

delete cfamFwdDtls;

you can use delete keyword for deleting a object.

您可以使用 delete 关键字删除对象。

more details read

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