ES6过滤器-如何返回对象而不是数组? [英] ES6 filter - how to return an object instead of an array?

问题描述

我有一堆对象数组，我想使用过滤器来获取特定的对象，但是我使用下面的代码来获取数组.

I have bunch of array of object, I want to get particular object using filter, but I got array using below code.

const target = [{
  name: 'abc',
  id: 1
}, {
  name: 'def',
  id: 2
}]

const x = target.filter(o => o.id === 1)
console.log(x)

推荐答案

如评论中所述，filter不允许您从数组中获取特定对象-它只会返回另一个数组，其元素满足给定条件谓词.您实际需要的是 Array.prototype .find() .引用文档:

As said in the comments, filter won't allow you to get a particular object from an array - it just returns another array which elements satisfy the given predicate. What you actually need is Array.prototype.find(). Quoting the doc:

find()方法返回数组中第一个元素的值 满足提供的测试功能.否则，undefined是 返回.

The find() method returns the value of the first element in the array that satisfies the provided testing function. Otherwise undefined is returned.

所以您的代码如下:

const target = [{
  name: 'abc',
  id: 1
}, {
  name: 'def',
  id: 2
}];

const x = target.find(o => o.id === 1);
console.log(x); // {name: "abc", id: 1}

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