我想一步一步地解释这个简短的公认答案:

var objects = [{ x: 3 }, { x: 1 }, { x: 2 }]; // array.map lets you extract an array of attribute values var xValues = objects.map(function(o) { return o.x; }); // es6 xValues = Array.from(objects, o => o.x); // function.apply lets you expand an array argument as individual arguments // So the following is equivalent to Math.max(3, 1, 2) // The first argument is "this" but since Math.max doesn't need it, null is fine var xMax = Math.max.apply(null, xValues); // es6 xMax = Math.max(...xValues); // Finally, to find the object that has the maximum x value (note that result is array): var maxXObjects = objects.filter(function(o) { return o.x === xMax; }); // Altogether xMax = Math.max.apply(null, objects.map(function(o) { return o.x; })); var maxXObject = objects.filter(function(o) { return o.x === xMax; })[0]; // es6 xMax = Math.max(...Array.from(objects, o => o.x)); maxXObject = objects.find(o => o.x === xMax); document.write('<p>objects: ' + JSON.stringify(objects) + '</p>'); document.write('<p>xValues: ' + JSON.stringify(xValues) + '</p>'); document.write('<p>xMax: ' + JSON.stringify(xMax) + '</p>'); document.write('<p>maxXObjects: ' + JSON.stringify(maxXObjects) + '</p>'); document.write('<p>maxXObject: ' + JSON.stringify(maxXObject) + '</p>');

进一步的信息:

Math.max.apply () Array.prototype.map () Array.from () Function.prototype.apply () Array.prototype.filter () Array.prototype.find ()

求数组中所有对象的y的最大值:

    Math.max.apply(Math, array.map(function(o) { return o.y; }))

或者在更现代的JavaScript中:

    Math.max(...array.map(o => o.y))

ES6解决方案

Math.max(…array.map(函数(o){返回o.y;}))

详情见https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/max

// Here is very simple way to go:

// Your DataSet.

let numberArray = [
  {
    "x": "8/11/2009",
    "y": 0.026572007
  },
  {
    "x": "8/12/2009",
    "y": 0.025057454
  },
  {
    "x": "8/13/2009",
    "y": 0.024530916
  },
  {
    "x": "8/14/2009",
    "y": 0.031004457
  }
]

// 1. First create Array, containing all the value of Y
let result = numberArray.map((y) => y)
console.log(result) // >> [0.026572007,0.025057454,0.024530916,0.031004457]

// 2.
let maxValue = Math.max.apply(null, result)
console.log(maxValue) // >> 0.031004457

谢谢你在这里找到的答案，我希望它能对别人有用。 这个typescript函数可以被调用来搜索数组对象字段中可能存在的最大值:

function getHighestField(objArray: any[], fieldName: string) {
  return Number(
    Math.max.apply(
      Math,
      objArray?.map(o => o[fieldName] || 0),
    ) || 0,
  );
}

以这些值为例:

const scoreBoard = [
  { name: 'player1', score: 4 },
  { name: 'player2', score: 9 },
  { name: 'player3', score: 7 }
]

你可以这样调用这个函数:

const myHighestVariable = `This is the highest: ${getHighestField(scoreBoard, "score")}`;

结果会是这样的:

console.log(myHighestVariable);

这是最高的:9

var max = 0;                
jQuery.map(arr, function (obj) {
  if (obj.attr > max)
    max = obj.attr;
});