javascript - 如何检查对象数组中某个键的值是否全部为0？

Question

我在数组中有以下对象

[
    {
        "event":"a",
        "count":0
    },
    {
        "event":"b",
        "count":0
    },
    {
        "event":"c",
        "count":0
    }
]

我需要检查 count 的所有值是否为零。

我尝试过以下代码

Object.values(alarmTypeCount).every(count => count === 0)

每次都返回 false

Answer 1

您需要解构对象才能获得所需的属性。

var alarmTypeCount = [{ event: "a", count: 0 }, { event: "b", count: 0 }, { event: "c", count: 0 }],
    allCountsZero = Object.values(alarmTypeCount).every(({ count }) => count === 0);

console.log(allCountsZero);

或者使用具有属性的对象。

var alarmTypeCount = [{ event: "a", count: 0 }, { event: "b", count: 0 }, { event: "c", count: 0 }],
    allCountsZero = Object.values(alarmTypeCount).every(o => o.count === 0);

console.log(allCountsZero);