ES6查找对象数组的最大数量 [英] ES6 Find the maximum number of an array of objects

问题描述

我有以下数据

shots = [
    {id: 1, amount: 2},
    {id: 2, amount: 4}
]

现在我正在尝试获取数量最高的对象

Now I'm trying to get the object which has the highest amount

我尝试使用reduce，如下所示

I've tried using reduce like follows

let highest = shots.reduce((max, shot) => {
    return shot.amount > max ? shot : max, 0
});

但是我总是得到最低的数字。
知道我可能会缺少什么吗？

But I'm always getting the lowest number. Any idea what I might be missing?

谢谢。

推荐答案

这里有两个问题，第一个是reduce需要一个返回值。第二个是您正在将数字与对象进行比较。

There are two problems here, the first is that a reduce needs a return value. the second is you're comparing a number with an object.

因此，我认为您需要这样的东西：

Therefore, I think you need something like this:

// This will return the object with the highest amount.
let highest = shots.reduce((max, shot) => {
    return shot.amount >= max.amount ? shot : max;
}, {
    // The assumption here is that no amount is lower than a Double-precision float can go.
    amount: Number.MIN_SAFE_INTEGER
});

// So, we can convert the object to the amount like so:
highest = highest.amount;

编辑：

干净短的一个班轮看起来像这样：

A clean short one liner would look something like so:

const highest = shots.sort((a, b) => b.amount - a.amount)[0]

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