JavaScript 检查属性数组是否按升序排序

Question

您好，我需要一种更好的方法来检查属性数组是否按升序排序。我用下面的数组可以具有动态长度属性。

数组必须使用 DrawCD 属性进行排序我想在不使用 for 循环的情况下以更好的方式做到这一点，如果可能的话，使用 Array 原型(prototype)函数

pevDrawInfo = [{
    "drawCD": 16281,
    "drawTime": "14:55:00",
    "winCol": 2,
    "oddEven": 0
  },
  {
    "drawCD": 16280,
    "drawTime": "14:50:00",
    "winCol": 2,
    "oddEven": 0
  },
  {
    "drawCD": 16279,
    "drawTime": "14:45:00",
    "winCol": 2,
    "oddEven": 0
  },
  {
    "drawCD": 16278,
    "drawTime": "14:40:00",
    "winCol": 2,
    "oddEven": 0
  }
];



for (i = 0; i < 2; i++) {
  if (pevDrawInfo[i].drawCD - pevDrawInfo[i + 1].drawCD > 0)
    sorted = false
  else
    sorted = true
}


console.log(sorted)

Answer 1

您可以使用 Array#every 查看并带走属性(property)进行检查。

var pevDrawInfo = [{ drawCD: 16281, drawTime: "14:55:00", winCol: 2, oddEven: 0 }, { drawCD: 16280, drawTime: "14:50:00", winCol: 2, oddEven: 0 }, { drawCD: 16279, drawTime: "14:45:00", winCol: 2, oddEven: 0 }, { drawCD: 16278, drawTime: "14:40:00", winCol: 2, oddEven: 0 }];

console.log(pevDrawInfo.every((b, i, { [i - 1]: a }) => !a || a.drawCD < b.drawCD));

pevDrawInfo.sort(({ drawCD: a }, { drawCD: b }) => a - b);

console.log(pevDrawInfo.every((b, i, { [i - 1]: a }) => !a || a.drawCD < b.drawCD));