javascript - 更改键后如何移动数组中的对象

Question

我有一个数组，其中的对象按键“order”排序

[
  {order: 1, id: 1, title: elem1},
  {order: 2, id: 2, title: elem2},
  {order: 3, id: 3, title: elem3},
  {order: 4, id: 4, title: elem4},
  {order: 5, id: 5, title: elem5}
]

将“elem2”中的键“order”更改为“4”后，数组应如下所示

[
  {order: 1, id: 1, title: elem1},  
  {order: 2, id: 3, title: elem3},
  {order: 3, id: 4, title: elem4},
  {order: 4, id: 2, title: elem2},
  {order: 5, id: 5, title: elem5}
]

我想在双向更改某个对象中的键“顺序”后移动数组中的对象

Answer 1

您可以使用Array.prototype.sort()功能:

var elem1, elem2, elem3, elem4, elem5;
var arr = [
  {order: 1, id: 1, title: elem1},
  {order: 2, id: 2, title: elem2},
  {order: 3, id: 3, title: elem3},
  {order: 4, id: 4, title: elem4},
  {order: 5, id: 5, title: elem5}
];

arr[1].order = 4;
arr[3].order = 2;

arr.sort((a, b) => a.order > b.order);