从对象中删除属性 (JavaScript) [英] Remove properties from objects (JavaScript)

问题描述

假设我创建一个对象如下:

Say I create an object as follows:

let myObject = {
  "ircEvent": "PRIVMSG",
  "method": "newURI",
  "regex": "^http://.*",
};

我应该如何删除属性 regex 以得到新的 myObject 如下?

How should I remove the property regex to end up with new myObject as follows?

let myObject = {
  "ircEvent": "PRIVMSG",
  "method": "newURI",
};

推荐答案

要从对象中删除属性(改变对象)，您可以这样做:

To remove a property from an object (mutating the object), you can do it like this:

delete myObject.regex;
// or,
delete myObject['regex'];
// or,
var prop = "regex";
delete myObject[prop];

演示

var myObject = {
    "ircEvent": "PRIVMSG",
    "method": "newURI",
    "regex": "^http://.*"
};
delete myObject.regex;

console.log(myObject);

对于任何有兴趣阅读更多相关信息的人，Stack Overflow 用户 kangax 写了一篇关于他们博客上的 delete 声明，了解删除.强烈推荐.

For anyone interested in reading more about it, Stack Overflow user kangax has written an incredibly in-depth blog post about the delete statement on their blog, Understanding delete. It is highly recommended.

如果您想要一个 新 对象，其中包含原始键的所有键，除了一些键，您可以使用 解构.

If you'd like a new object with all the keys of the original except some, you could use the destructuring.

演示

let myObject = {
  "ircEvent": "PRIVMSG",
  "method": "newURI",
  "regex": "^http://.*"
};

const {regex, ...newObj} = myObject;

console.log(newObj);   // has no 'regex' key
console.log(myObject); // remains unchanged

这篇关于从对象中删除属性 (JavaScript)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！