基于此现有数组对象创建新的多维数组 [英] Create new multidimensional array based on this existing array objec

问题描述

我被迫基于此现有数组对象构造一个新的多维数组

I'm stuck to construct a new multidimensional array based on this existing array object

acl:[
{
   view:true, 
   update:true, 
   remove:true, 
   userId:1, 
   username:"Mike"
},
{
   view:true, 
   update:true, 
   remove:false, 
   userId:2, 
   username:"Joe"
},
{
   view:true, 
   update:false, 
   remove:false, 
   userId:3, 
   username:"Lim"
}
]

将基于布尔属性构造新对象(如果这些布尔值等于true).新的数组看起来像这样

The new object will be constructed based on the boolean properties(if these boolean is equal to true). The new array will look like this

acl:[
{
view:[
   {username:"Mike", userId:1},
   {username:"Joe", userId:2},
   {username:"Lim", userId:3}
]
update:[
   {username:"Mike", userId:1},
   {username:"Joe", userId:2}
]
remove:[
   {username:"Mike", userId:1}
]

我坚持在迭代内部构造逻辑.也许有人可以给我一个提示.

Im stuck on constructing the logic inside the iteration. Maybe someone could give me a hint on this.

推荐答案

const acl = [{"view":true,"update":true,"remove":true,"userId":1,"username":"Mike"},{"view":true,"update":true,"remove":false,"userId":2,"username":"Joe"},{"view":true,"update":false,"remove":false,"userId":3,"username":"Lim"}]

function multi_dim (array) {

  const res = {
    view: [],
    update: [],
    remove: []
  }

  const keys = Object.keys(array[0])

  for (let i = 0; i < array.length; i++) {
    keys.forEach(function (key) {
      if (key !== 'username' && key !== 'userId') {
        if (array[i][key]) {
          res[key].push({
            username: array[i].username,
            userId: array[i].userId
          })
        }
      }
    })
  }

  return res

}

let obj = multi_dim(acl) // returns object. Push to array if so desired

console.log(obj)

// => result
//   {
//     "view": [
//       {
//         "username": "Mike",
//         "userId": 1
//       },
//       {
//         "username": "Joe",
//         "userId": 2
//       },
//       {
//         "username": "Lim",
//         "userId": 3
//       }
//     ],
//     "update": [
//       {
//         "username": "Mike",
//         "userId": 1
//       },
//       {
//         "username": "Joe",
//         "userId": 2
//       }
//     ],
//     "remove": [
//       {
//         "username": "Mike",
//         "userId": 1
//       }
//     ]
//   }

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