使用JavaScript ES6迭代器转换数组

如何使用javascript es6迭代器函数将employees数组变量转换为departments数组变量？我正在寻找一个有效的解决方案

发件人：

var employees = [
    { name: 'John', department: 'Digital Experience' },
    { name: 'Doe', department: 'Digital Transformation' },
    { name: 'Symon', department: 'Digital Planning' },
    { name: 'Joey', department: 'Digital Experience' },
    { name: 'Abul', department: 'Digital Experience' },
    { name: 'Smith', department: 'Digital Experience' },
    { name: 'Ajad', department: 'Digital Transformation' },
    { name: 'Rahim', department: 'Digital Transformation' },
    { name: 'Luke', department: 'Digital Planning' },
];

var departments = [
        {
            department: 'Digital Experience',
            employeeNames: ['Johm', 'Joey', 'Abul', 'Smith']
        },
        {
            department: 'Digital Transformation',
            employeeNames: ['Doe', 'Ajad', 'Rahim']
        },
        {
            department: 'Digital Planning',
            employeeNames: ['Symon', 'Luke']
        }
    ]

至：

var employees = [
    { name: 'John', department: 'Digital Experience' },
    { name: 'Doe', department: 'Digital Transformation' },
    { name: 'Symon', department: 'Digital Planning' },
    { name: 'Joey', department: 'Digital Experience' },
    { name: 'Abul', department: 'Digital Experience' },
    { name: 'Smith', department: 'Digital Experience' },
    { name: 'Ajad', department: 'Digital Transformation' },
    { name: 'Rahim', department: 'Digital Transformation' },
    { name: 'Luke', department: 'Digital Planning' },
];

var departments = [
        {
            department: 'Digital Experience',
            employeeNames: ['Johm', 'Joey', 'Abul', 'Smith']
        },
        {
            department: 'Digital Transformation',
            employeeNames: ['Doe', 'Ajad', 'Rahim']
        },
        {
            department: 'Digital Planning',
            employeeNames: ['Symon', 'Luke']
        }
    ]

---

我相信还有其他的方法，不过这似乎很短

var e=[
{名称：'John'，部门：'Digital Experience'}，
{名称：'Doe'，部门：'Digital Transformation'}，
{名称：'Symon'，部门：'Digital Planning'}，
{名称：'Joey'，部门：'Digital Experience'}，
{名称：'Abul'，部门：'Digital Experience'}，
{名称：'Smith'，部门：'Digital Experience'}，
{名称：'Ajad'，部门：'Digital Transformation'}，
{名称：'Rahim'，部门：'Digital Transformation'}，
{名称：'Luke'，部门：'Digital Planning'}，
];
const departments=[…新集合（e.map（x=>x.department））].map（y=>{
返回{
部门:y,，
员工名称：e.filter（z=>z.department==y）.map（w=>w.name）
}
})
console.log（departments）

是否有您尝试过的低效代码？为什么是迭代器？为什么不只是一个reduce操作呢？这是reduce的完美用例。为什么不减少呢？