从JSON对象中删除元素 [英] Remove element from JSON Object

问题描述

我有一个json数组看起来像这样：

I have a json array which looks something like this:

  {
    "id": 1,
    "children": [
    {
        "id": 2,
        "children": {
            "id": 3,
            "children": {
                "id": 4,
                "children": ""
            }
        }
    },
    {
        "id": 2,
        "children": {
            "id": 3,
            "children": {
                "id": 4,
                "children": ""
            }
        }
    },
    {
        "id": 2,
        "children": {
            "id": 3,
            "children": {
                "id": 4,
                "children": ""
            }
        }
    },
    {
        "id": 2,
        "children": {
            "id": 3,
            "children": {
                "id": 4,
                "children": ""
            }
        }
    },
    {
        "id": 2,
        "children": {
            "id": 3,
            "children": {
                "id": 4,
                "children": ""
            }
        }
    },
    {
        "id": 2,
        "children": {
            "id": 3,
            "children": {
                "id": 4,
                "children": ""
            }
        }
    },
    {
        "id": 2,
        "children": {
            "id": 3,
            "children": {
                "id": 4,
                "children": ""
            }
        }
    }]
}

我希望有一个函数可以删除具有孩子们空虚。我该怎么做？我不是要求答案，只是建议

I would like to have a function which removes the elements which has the "children" empty. How can I do it? I am not asking for the answer, only suggestions

推荐答案

要迭代对象的键，请使用 for .. in loop：

To iterate through the keys of an object, use a for .. in loop:

for (var key in json_obj) {
    if (json_obj.hasOwnProperty(key)) {
        // do something with `key'
    }
}

要测试空子项的所有元素，可以使用递归方法：遍历所有元素并递归测试它们的子项。

To test all elements for empty children, you can use a recursive approach: iterate through all elements and recursively test their children too.

可以使用 delete 关键字来删除对象的属性：

Removing a property of an object can be done by using the delete keyword:

var someObj = {
    "one": 123,
    "two": 345
};
var key = "one";
delete someObj[key];
console.log(someObj); // prints { "two": 345 }

文档：

• https：// developer.mozilla.org/en-US/docs/JavaScript/Guide/Working_with_Objects


• https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Statements/for...in


• https： //developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/delete

• https://developer.mozilla.org/en-US/docs/JavaScript/Guide/Working_with_Objects
• https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Statements/for...in
• https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/delete

这篇关于从JSON对象中删除元素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！