在具有对象的数组中，检查这些对象中是否存在键 [英] In an array with objects, check if a key exists in any of those objects

问题描述

我有一个对象数组，需要查看其中是否存在键.这是我现在正在做的事情:

I have an array of objects, and need to see if a key exists in any of them. Here is what I am doing now:

const arr = [{ id: 1, foo: 'bar' }, { id: 2 }]
arr.map(o => o.foo && true).includes(true)
// true

是否有更好/更被接受的方式来做到这一点?

Is there any better/more accepted way to do this?

推荐答案

我将使用

const arr = [
  { id: 1, foo: 'bar' },
  { id: 2 }
];

var result = arr.some(e => e.hasOwnProperty('foo'));
console.log("The array contains an object with a 'foo' property: " + result);

var result = arr.some(e => e.hasOwnProperty('baz'));
console.log("The array contains an object with a 'baz' property: " + result);

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