node.js - 使用 lodash 分组数组

Question

我有一个数组

var arrList = [{ 
"email": "a@mailinator.com",
"pname": "john doe1" },
{ 
"email": "a@mailinator.com",
"pname": "john doe2" },
{ 
"email": "a@mailinator.com",
"pname": "john doe3" } ]

我想转换这个数组并想要像下面这样的输出

{
"a@mailinator.com": [{
    "email": "a@mailinator.com",
    "pname": ["john doe1", "john doe2", "john doe3"]
}]
}

我试过下面的 lodash 但没有成功

arrList = _.uniqBy(arrList, "email", "pname")
result = _.chain(arrList).groupBy('email').value('')

在多个不同的邮件呈现数组中，我们需要按邮件分组。

Answer 1

使用_.groupBy() , 然后 _.map()分组的对象到请求的形式:

var arrList = [{"email":"a@mailinator.com","pname":"john doe1"},{"email":"a@mailinator.com","pname":"john doe2"},{"email":"a@mailinator.com","pname":"john doe3"}];

var result = _(arrList)
  .groupBy('email')
  .map((v, email) => ({
    email,
    pname: _.map(v, 'pname')
  }))
  .value();

console.log(result);

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js"></script>