javascript - 将数组数组中的唯一值合并到数组中

Question

我有这样的数组:

[
  [
    {id:1, name:'xxx'}
  ],
  [
    {id:2, name:'xxx'},
    {id:1, name:'xxx'}
  ],
  [
    {id:2, name:'xxx'},
    {id:1, name:'xxx'},
    {id:3, name:'xxx'}
  ]
]

我只需要选择具有唯一 id 的对象并将它们合并到一个数组中。每个对象都有 id 属性，所以我尝试了这个:

_.(data).union().uniqBy(o => o.id).value()

但它给了我错误的结果。

我所需的输出应该是这样的:

[{id:1, name:'xxx'}, {id:2, name:'xxx'}, {id:3, name:'xxx'}]

你能帮我吗？谢谢。

Answer 1

使用_.flatten()将子数组合并为单个数组，然后应用 _.uniqBy():

const data = [[{"id":1,"name":"xxx"}],[{"id":2,"name":"xxx"},{"id":1,"name":"xxx"}],[{"id":2,"name":"xxx"},{"id":1,"name":"xxx"},{"id":3,"name":"xxx"}]];

const result = _(data)
  .flatten()
  .uniqBy('id')
  .value();
  
console.log(result);

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