Question

我正在尝试编写一个对数组进行排序的函数：

[
  {score:10, name:foo},
  {score:-10, name:bar},
  {score:0, name:newNAME}
]

进入

[
  {rank:1, score:10, name:foo},
  {rank:2, score:0, name:newNAME},
  {rank:3, score:-10, name:bar}
]

但是我发现很难访问键（使用分数排序并在每个对象中添加等级）。有人可以给我一些编写此类功能的提示吗？

Answer 1

您可以使用自定义的sort和Array.prototype.map向对象数组添加额外的键等级。

let arr = [{
  score: 10,
  name: "foo"
}, {
  score: -10,
  name: "bar"
}, {
  score: 0,
  name: "newNAME"
}];

arr.sort((c1, c2) => {
  return c2.score - c1.score;
});

arr = arr.map((val, index) => {

  val.rank = index + 1;
  return val;
})

console.log(arr);

Answer 2

您可以在一个衬里中使用排序和映射：

const sorted = [
      {score: 10, name: "foo"},
      {score: -10, name: "bar"},
      {score: 0, name: "newNAME"} ]
  .sort( (a, b) => a.score - b.score)
  .map( (v, i) => ({rank: i + 1, ...v}));

console.log(sorted);

.as-console-wrapper { top: 0; max-height: 100% !important; }

Answer 3

const sorted = [
      {score: 10, name: "foo"},
      {score: -10, name: "bar"},
      {score: 0, name: "newNAME"} ]
  .sort( (a, b) => a.score - b.score)
  .map( (v, i) => ({rank: i + 1, ...v}));

如何使用对象的键对对象数组进行排序？

3 个答案: