Remove object from JSON which is matched into Netsted Object

kasim mohamed

6y932TypeScript

i have a list of object like below

listobj = [

{id:101, name:'AAA'},

{id:102, name:'BBB'},

{id:103, name:'CCC'},

{id:104, name:'DDD'},

{id:105, name:'EEE'},

{id:106, name:'FFF'},

{id:107, name:'GGG'},

{id:108, name:'HHH'},

{id:109, name:'III'},

{id:110, name:'JJJ'},

];

and also nested object like below

nestobj = [

{ id:101, name: 'AAA', parentid:0, level: 'L1',

children: [

{ id: 102, name: 'BBB', parentid:101, level: 'L2'},

{ id: 103, name: 'CCC', parentid:101, level: 'L2',

children: [{id: 104, name: 'DDD', parentid:103, level: 'L3'}]

}

]

{ id:105, name: 'EEE', parentid:0, level: 'L1',

children: [{ id: 106, name: 'FFF', parentid:105, level: 'L2'}]

}

];

what i want is i need to remove all the object from 'listobj' which the 'id' is matching into 'nestobj' id.

the expected result would be like below

resultobj = [

{id:107, name:'GGG'},

{id:108, name:'HHH'},

{id:109, name:'III'},

{id:110, name:'JJJ'}

];

Thanks

2 Replies

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Harshal Limaye5y ago
I am not sure this will be the best way to do this. I thought I'll be a better idea to flatten the nestobj before comparing it with listobj.
const listobj = [
  { id: 101, name: 'AAA' },
  { id: 102, name: 'BBB' },
  { id: 103, name: 'CCC' },
  { id: 104, name: 'DDD' },
  { id: 105, name: 'EEE' },
  { id: 106, name: 'FFF' },
  { id: 107, name: 'GGG' },
  { id: 108, name: 'HHH' },
  { id: 109, name: 'III' },
  { id: 110, name: 'JJJ' },
];

const nestobj = [
  {
    id: 101, name: 'AAA', parentid: 0, level: 'L1',
    children: [
      { id: 102, name: 'BBB', parentid: 101, level: 'L2' },
      {
        id: 103, name: 'CCC', parentid: 101, level: 'L2',
        children: [{ id: 104, name: 'DDD', parentid: 103, level: 'L3' }]
      }
    ]
  },
  {
    id: 105, name: 'EEE', parentid: 0, level: 'L1',
    children: [{ id: 106, name: 'FFF', parentid: 105, level: 'L2' }]
  }
];
First, I'll create a variable to hold ids of all rows in nestobj including the child and grand child rows.
const common = [];
Then I'll create a function that will recursively loop through all rows in nestobj
function flatten (list) {
   list.forEach((item) => {
        if (item.children) {
            flatten(item.children);
        }
        common.push(item.id);
    })
}
This will give me the list of all ids in nestobj.
console.log(common)
// output: [102, 104, 103, 101, 106, 105]
The next thing I'll do is simply use common to filter the listobj.
listobj.filter(obj => common.indexOf(obj.id) === -1);
/* Output
[
   {id: 107, name: "GGG"}
   {id: 108, name: "HHH"}
   {id: 109, name: "III"}
   {id: 110, name: "JJJ"}
]
*/
Laxmidhar Sahoo6y ago
hi

What is the tool you used like c# or javascript or something others

Thanks and regards