javascript - 将嵌套数组转换为具有键值 Javascript 的单个对象

Question

我有一个包含嵌套数组的数组。

嵌套数组可以包含多个对象。

const axisChoiceLoop = _.map(groupByAxisChoice) 

输出:

[
 0: [ {age: 15, count: 242, role: "JW"}] // length 1
 1: [ {age: 21, count: 995, role: "JW"} , {age: 21, count: 137, role: "SW"} ] // length 2
 2: [ {age: 25, count: 924, role: "JW"},  {age: 25, count: 455, role: "SW"}, {age: 25, count: 32, role: "EW"} ]
]

我希望嵌套数组成为单个对象，使用它们的 Angular 色作为键，并计数为值

预期输出如下

[ 
  {age :15, JW: 242}, 
  {age: 21, JW:995, SW: 137},
  {age: 25, JW: 924, SW: 445, EW: 32}
]

编辑:我尝试过以下代码

const result = groupByAxisChoice.reduce(
    (obj, item) => Object.assign(obj, { [item.role]: item.count }),
    {},
  )

输出:{ undefined: undefined }

Answer 1

明白了...

const result = groupByAxisChoice.map(items =>
    items.reduce((obj, item) => Object.assign(obj, { age: item.age, [item.role]: item.count }), {}),
)