如何查找数组中包含最高值的对象

Question

我正在使用一个库，它可以预测网络摄像头前用户的情绪。有四种情绪:愤怒、悲伤、惊讶和快乐。我想看看哪种情绪得分最高。当我console.log predictedEmotions时，我看到了以下内容：

(4) [{…}, {…}, {…}, {…}]
 0: {emotion: "angry"value: 0.08495773461377512}
 1: {emotion: "sad", value: 0.05993173506165729}
 2: {emotion: "surprised", value: 0.054032595527500206}
 3: {emotion: "happy", value: 0.18562819815754616}

对如何获得最有价值的情感有什么想法吗？

Answer 1

您可以减少数组并接受值最高的对象。然后拿出物体的情感。

​

var data = [{ emotion: "angry", value: 0.08495773461377512 }, { emotion: "sad", value: 0.05993173506165729 }, { emotion: "surprised", value: 0.054032595527500206 }, { emotion: "happy", value: 0.18562819815754616 }],
    highest = data
        .reduce((a, b) => a.value > b.value ? a : b)
        .emotion;
    
console.log(highest);

​

Answer 2

我会用减缩

​

const highest = arr.reduce((a, b) => a.value > b.value ? a : b, {});
console.log(highest);

<script>
const arr = [
    {
        emotion: "angry",
        value: 0.08495773461377512
    },
    {
        emotion: "sad",
        value: 0.05993173506165729
    },
    {
        emotion: "surprised",
        value: 0.054032595527500206
    },
    {
        emotion: "happy",
        value: 0.18562819815754616
    }
];
</script>

​

或者您可以使用排序(但由于性能原因，我更喜欢减少)

​

arr.sort((a, b) => b.value - a.value);
console.log(arr[0]);

<script>
    const arr = [
        {
            emotion: "angry",
            value: 0.08495773461377512
        },
        {
            emotion: "sad",
            value: 0.05993173506165729
        },
        {
            emotion: "surprised",
            value: 0.054032595527500206
        },
        {
            emotion: "happy",
            value: 0.18562819815754616
        }
    ];
    </script>

​

Answer 3

const data = [
            {emotion: "angry", value: 0.08495773461377512},
            {emotion: "sad", value: 0.05993173506165729},
            {emotion: "surprised", value: 0.054032595527500206},
            {emotion: "happy", value: 0.18562819815754616}
        ],
        highest = process(data);

    function process(data) {
        return data.sort(function (a, b) {
            return b.value - a.value;
        });
    }

    console.log("highest==>",highest,"sorted-array ==>",data[0].emotion);