如何将嵌套对象数组转换为javascript中的对象？

Question

I have got array of nested array of objects . I want to get only Permission objects from data and I need to convert data array to permission objects .

 "data":[
       {
          "Book":[
             {
                "label":"Can View",
                "value":"can_view"
             },
             {
                "label":"Can Create",
                "value":"can_create"
             },

          ]
       },
       {
          "Articles":[
             {
                "label":"Can View",
                "value":"can_view"
             },
         ]
       },
       {
          "Journals":[

             {
                "label":"Can Upload",
                "value":"can_upload"
             },
             {
                "label":"Can Download",
                "value":"can_download"
             }
          ]
       },

       {
          "Permission":[
             {
                "label":"Can View",
                "value":"can_view"
             },
             {
                "label":"Can Create",
                "value":"can_create"
             }
          ]
       }
    ]

I am trying to get permission objects from list of my data objects. I am using filter method for geting Permission array and want to convert permission objects, but I got nested arrays . where is the problem?

let dataPer = data.permissions.filter(item=>item.Permission).map(item=>item.Permission)

console.log(dataPer)

My accepted output would be :

 let output= {

       Permission:{
         can_view:"can_view",
       can_create:"can_create"

       }
   }   

Answer 1

Well you could try something like this :

 let data=[ { "Book":[ { "label":"Can View", "value":"can_view" }, { "label":"Can Create", "value":"can_create" } ] }, { "Articles":[ { "label":"Can View", "value":"can_view" } ] }, { "Journals":[ { "label":"Can Upload", "value":"can_upload" }, { "label":"Can Download", "value":"can_download" } ] }, { "Permission":[ { "label":"Can View", "value":"can_view" }, { "label":"Can Create", "value":"can_create" } ] } ]; let myPermissionObjects = []; let permissionConvert = ()=>{ for(let current in data) for(let currentObject in data[current]) for(let currentResult in data[current][currentObject]) myPermissionObjects.push(data[current][currentObject][currentResult]); }; permissionConvert(); console.log(myPermissionObjects);

if i understood your problem correctly

for the object permission only :

 let data=[ { "Book":[ { "label":"Can View", "value":"can_view" }, { "label":"Can Create", "value":"can_create" } ] }, { "Articles":[ { "label":"Can View", "value":"can_view" } ] }, { "Journals":[ { "label":"Can Upload", "value":"can_upload" }, { "label":"Can Download", "value":"can_download" } ] }, { "Permission":[ { "label":"Can View", "value":"can_view" }, { "label":"Can Create", "value":"can_create" } ] } ]; let myPermissionObjects = []; let permissionConvert = ()=>{ for(let current in data) for(let currentObject in data[current].Permission) myPermissionObjects.push( data[current].Permission[currentObject]); }; permissionConvert(); console.log(myPermissionObjects); let onePermission = []; for(let next in myPermissionObjects) { onePermission["Permission"]=myPermissionObjects[next]; console.log(myPermissionObjects[next]); }

Answer 2

You can do it with reduce function, like this:

const data = [
  {
    Book: [
      {
        label: "Can View",
        value: "can_view"
      },
      {
        label: "Can Create",
        value: "can_create"
      }
    ]
  },
  {
    Articles: [
      {
        label: "Can View",
        value: "can_view"
      }
    ]
  },
  {
    Journals: [
      {
        label: "Can Upload",
        value: "can_upload"
      },
      {
        label: "Can Download",
        value: "can_download"
      }
    ]
  },

  {
    Permission: [
      {
        label: "Can View",
        value: "can_view"
      },
      {
        label: "Can Create",
        value: "can_create"
      }
    ]
  }
];

--

function getPermissionList() {
  const list = data
    .filter(item => item.Permission)[0]
    .Permission.reduce((list, item) => {
      list.push({ [item.label]: item.value });
      return list;
    }, {});
  return Object.assign({}, list);
}

Answer 3

I got the solution , but is it best for my code

let dataPer = data.permissions.filter(item=>item.Permission)
const result = Object.assign({},dataPer)

let res = result[0].Permission.map(item=>{
  return {
    [item.value]:item.value
  }
})
const obj = Object.assign({},res)
console.log(obj[0].can_view)