获取具有给定键的“最高”值的对象数组的元素索引

Question

Let's say I have the following array of objects:

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

What would be the quickest method for extract the position ( index ) of the element of the object with the highest score value...so, in the above case, the value would be index 3 ...

NB Scores are dynamic, and the "winning" element is the highest value...

Answer 1

You could get the keys and reduce the indices by checking the score.

 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

 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);

Answer 3

Try this. Use javascript max and map function to get value of index

 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) I think this will also give you correct result

 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)