javascript - ES6 使用reduce 查找组合的多个值的最大值

Question

我有以下方法可以找到信用最高的用户

let highest = this.users.reduce((max, current) => {
    current.credits > max.credits ? current : max, {credits: 0}
});

Now I'm wondering how I can see who has the highest (credits + shots)

我尝试了以下操作但没有成功，我变得未定义

let bestSupporter = this.users.reduce((max, current) => {
    (current.credits + current.shots) > (max.credits + max.shots) ? current : max, {credits: 0}
});

以下方法也不起作用(将镜头添加到初始值

let bestSupporter = this.users.reduce((max, current) => {
    (current.credits + current.shots) > (max.credits + max.shots) ? current : max, {credits: 0, shots: 0}
});

Answer 1

在箭头函数中使用大括号，您需要一个 return 语句。

然后，您可以使用起始值来检查该值

let highest = this.users.reduce((max, current) => {
    return current.credits > max.credits ? current : max, 
}, { credits: 0 });

或者省略起始值并直接使用对象。

let highest = this.users.reduce((a, b) => a.credits > b.credits ? a : b);