根据值从对象数组中选择一个属性:Javascript

问题描述：

我有一个具有以下结构的对象数组:

I have an array of objects with the following structure:

var arr = [
  {
    "value": "abc",
    "checked": true
  },
  {
    "value": "xyz",
    "checked": false
  },
  {
    "value": "lmn",
    "checked": true
  }
];

let result = arr.filter(item => item.checked);

console.log(result);

我希望输出为:

["abc", "lmn"]

因为这两个value具有checked: true.

我尝试根据检查的值进行过滤:

I have tried filtering out based on checked value:

let result = arr.filter(item => item.checked);

我正在获取具有checked属性值并设置为true的对象.

I am getting the objects that has checked property value that is set to true.

我们将不胜感激.

答

您可以使用reduce并检查checked属性是否为true，然后检查push(如

You can use reduce and check if the checked property is true, then push (As pointed out by assoron) the value to the accumulator - there is no need for 2 loops:

const arr = [
  { "value": "abc", "checked": true },
  { "value": "xyz", "checked": false },
  { "value": "lmn", "checked": true }
]

const filtered = arr.reduce((a, o) => (o.checked && a.push(o.value), a), [])      
console.log(filtered)

根据值从对象数组中选择一个属性:Javascript

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