删除不包含特定字段的 JSON 对象答案

【问题标题】：Remove JSON objects not containing a specific field删除不包含特定字段的 JSON 对象
【发布时间】：2020-06-10 21:48:40
【问题描述】：

我想使用 node/js 从以下内容中删除每个不包含名称字段的对象：

[{
    "20": "Start Date:",
    "28": "15/06/2020",
},
{
    "name": "Jun/Jul 2020",
    "Monday 15th June": "Mon",

},
{
    "Monday 15th June": 15,
    "Tuesday 16th June": 16
},
{
    "name": "Charlie Sheen"
},
{
    "name": "Ray Liotta",
    "Thursday 18th June": "08:00-18:00:T5&6"
},
{
    "Thursday 18th June": "Theatres 5&6"
},
{
    "name": "Neil, Whatever"
},
{
    "3": "Theatres 1&2"
},
{
    "name": "Joe,  Bloggs",
    "Monday 15th June": "08:00-17:00:T1&2"
}]

我想要的最终输出是：

[
{
    "name": "Jun/Jul 2020",
    "Monday 15th June": "Mon",

},
{
    "name": "Charlie Sheen"
},
{
    "name": "Ray Liotta",
    "Thursday 18th June": "08:00-18:00:T5&6"
},
{
    "name": "Neil, Whatever"
},
{
    "name": "Joe,  Bloggs",
    "Monday 15th June": "08:00-17:00:T1&2"
}]

非常感谢！

【问题讨论】：

我不知道这个结构是什么，但它很乱。你目前有什么尝试？
到目前为止你有什么尝试？
你可能想使用developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…
谢谢大家，太棒了 - 工作愉快，感激不尽！
您应该接受其中一个答案。它给写答案的人打分。

标签： javascript node.js arrays json

【解决方案1】：

您可以使用Array#filter。请注意，filter 创建了一个包含过滤元素的新数组，因此如果要更改原始数组，则需要将结果分配给包含该数组的变量。

arr = arr.filter(obj=>'name' in obj);

const arr = [{
    "20": "Start Date:",
    "28": "15/06/2020",
},
{
    "name": "Jun/Jul 2020",
    "Monday 15th June": "Mon",

},
{
    "Monday 15th June": 15,
    "Tuesday 16th June": 16
},
{
    "name": "Charlie Sheen"
},
{
    "name": "Ray Liotta",
    "Thursday 18th June": "08:00-18:00:T5&6"
},
{
    "Thursday 18th June": "Theatres 5&6"
},
{
    "name": "Neil, Whatever"
},
{
    "3": "Theatres 1&2"
},
{
    "name": "Joe,  Bloggs",
    "Monday 15th June": "08:00-17:00:T1&2"
}];
const res = arr.filter(obj=>"name" in obj);
console.log(res);

【讨论】：

【解决方案2】：

const data = 
[{ "20": "Start Date:", "28": "15/06/2020", }, { "name": "Jun/Jul 2020", "Monday 15th June": "Mon",

},
{
    "Monday 15th June": 15,
    "Tuesday 16th June": 16
},
{
    "name": "Charlie Sheen"
},
{
    "name": "Ray Liotta",
    "Thursday 18th June": "08:00-18:00:T5&6"
},
{
    "Thursday 18th June": "Theatres 5&6"
},
{
    "name": "Neil, Whatever"
},
{
    "3": "Theatres 1&2"
},
{
    "name": "Joe,  Bloggs",
    "Monday 15th June": "08:00-17:00:T1&2"
}]
const filteredData = data.filter(item => item.name)
console.log(filteredData)

【讨论】：

我为什么不在几小时前问这个！？！谢谢你，完美！