Lodash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，并希望输出如下

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

我在下面尝试了lodash但没有成功

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

在数组中，有多个不同的电子邮件呈现，我们需要按电子邮件分组。

Answer 1

使用_.groupBy()，然后_.map()将分组的对象转换为请求的形式：

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);

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