获取具有给定键的“最高”值的对象数组的元素索引

Question

假设我有以下对象数组：

[
   { name: 'january', score: 3.02 },
   { name: 'february', score: 1.02 },
   { name: 'march', score: 0 },
   { name: 'april', score: 12 },
]

提取具有最高分值的对象元素的位置 (index) 的最快方法是什么...所以，在上述情况下，该值将是索引3...

注意分数是动态的，“获胜”元素是最高值...

Answer 1

您可以通过查看分数来获取键并减少索引。

var data = [{ name: 'january', score: 3.02 }, { name: 'february', score: 1.02 }, { name: 'march', score: 0 }, { name: 'april', score: 12 }],
    index = [...data.keys()].reduce((a, b) => data[a].score > data[b].score ? a : b);

console.log(index);

Answer 2

试试这个。使用 javascript max 和 map 函数获取索引值

 var data = [
   { name: 'january', score: 3.02 },
   { name: 'february', score: 1.02 },
   { name: 'march', score: 0 },
   { name: 'april', score: 12 }
];

var maxValue = 
Math.max.apply(Math, data.map(function(row,index) { return index; }))


console.log(maxValue)

2）我认为这也会给你正确的结果

var data = [
   { name: 'april', score: 1 },
   { name: 'january', score: 3.02 },
   { name: 'february', score: 11.02 },
   { name: 'march', score: 2 }
   
];
var maxValue = Math.max.apply(Math, data.map(function(row) { return row.score; }))
var key = data.findIndex((row,index)=>{ if(row.score ===maxValue){return true}})

console.log(key)

Answer 3

var data = [
   { name: 'january', score: 3.02 },
   { name: 'february', score: 1.02 },
   { name: 'march', score: 0 },
   { name: 'april', score: 12 },
];

var resultValue = null;
var tempValue = Number.NEGATIVE_INFINITY;
data.forEach(function(element, index) {
    if(element.score > tempValue) {
        tempValue = element.score;
        resultValue = index;
    }
});

console.log(resultValue);