JavaScript从对象数组中获取键数组

我有这个数组,数组中的每个对象只有一个键:

[{ "hello": "value1" }, { "there": "value2" }, { "everybody": "value3" }]

我想将所有键提取到一个数组中,以便我想要的结果是:

["hello", "there", "everybody"]

在Lodash或vanilla Javascript(最好是ES6)中这样做的简洁方法是什么？

你可以Array#map一起使用Object.keys.

let arr = [{ "hello": "value1" }, { "there": "value2" }, { "everybody": "value3" }];

let keys = [].concat(...arr.map(Object.keys));

console.log(keys);

const arr = [{ "hello": "value1" }, { "there": "value2" }, { "everybody": "value3" }];

const keys = Object.keys(Object.assign({}, ...arr));

console.log(keys);