Javascript - GroupBy 键以及如何为生成的对象建模

Question

我有这个数组:

[
  {id: 1, label: 'test', parent: 'parent 1'},
  {id: 2, label: 'fool', parent: 'parent 1'},
  {id: 3, label: 'bla', parent: 'parent 2'},
  {id: 4, label: 'foo', parent: 'parent 2'}
]

我正试图从中得到这样的东西:

[
  {parent: 'parent 1', members: [{id: 1, label: 'test'}, {id: 2, label: 'fool']},
  {parent: 'parent 2', members: [{id: 3, label: 'bla'}, {id: 4, label: 'foo']}
]

使用 underscore.js 我可以做到这一点:

_.groupBy(myList,'parent')
=> 
{
  'parent 1': [{id: 1, label: 'test'}, {id: 2, label: 'fool'],
  'parent 2': [{id: 3, label: 'bla'}, {id: 4, label: 'foo'],
}

...这不是我想要的。我很确定这是愚蠢的事情，但有点卡住了:(

Answer 1

好的，在这里找到了答案Group objects by property in javascript

所以groupBy现在被封装在一个链中并将结果传递给_.map函数:

.chain(myList)
      .groupBy('parent')
      .map(function(value, key) {
        return {
          parent: key,
          members: value
      }
    })
    .value()