javascript - 重构 JSON 对象数组

Question

我有一个 JSON 对象数组。但有些数据是重复的。有没有办法重组数组以排除重复值？我必须使用 map 功能吗？还是 for 循环？

userData = [{id:'101', Time:'3:00pm', Date:'5/25/20'},
            {id:'101', Time:'5:00pm', Date:'5/25/20'},
            {id:'101', Time:'5:00pm', Date:'6/25/20'},
            {id:'105', Time:'1:00pm', Date:'3/25/20'},
            {id:'105', Time:'5:00pm', Date:'5/25/20'}
           ]

是否可以像这样重组数据？

userData = [ {id:'101', Time:['3:00pm','5:00pm'], Date:['5/25/20', '6/25/20']},
             {id:'105', Time:['1:00pm','5:00pm'], Date:['3/25/20','5/25/20']}
           ]

如果您有任何指导或指导，我们将不胜感激!谢谢!

Answer 1

let userData = [{id:'101', Time:'3:00pm', Date:'5/25/20'},
        {id:'101', Time:'5:00pm', Date:'5/25/20'},
        {id:'101', Time:'5:00pm', Date:'6/25/20'},
        {id:'105', Time:'1:00pm', Date:'3/25/20'},
        {id:'105', Time:'5:00pm', Date:'5/25/20'}
       ]

let formattedUserData = {}

userData.forEach(user=>{
  if(!formattedUserData[user.id]) formattedUserData[user.id]= {
    id: user.id,
    Time: [],
    Date: [],
  }
  formattedUserData[user.id].Time.push(user.Time)
  formattedUserData[user.id].Date.push(user.Date)
})

const finalResponse = Object.entries(formattedUserData).map((e) => ( { ...e[1] } ));
console.log("finalResponse",finalResponse)