JS intersection of array and object of arrays

June 21, 2022

I want to delete some item from my object :

clientData : {
1111 : [
  {ID : 112, name : 'John',age : 23},
  {ID : 113, name : 'Doe',age : 21},
  {ID : 114, name : 'Stan',age : 24},
],

2222 : [
  {ID : 222, name : 'Sara',age : 15},
  {ID : 223, name : 'Wiliams',age : 61},
  {ID : 224, name : 'Alan',age : 45},
],

}

The data that I want to delete is stored in an array of Id’s like this :

[112,223,114]

So the output should look like this :

clientData : {
1111 : [
  {ID : 113, name : 'Doe',age : 21},
],
2222 : [
  {ID : 222, name : 'Sara',age : 15},
  {ID : 224, name : 'Alan',age : 45},
],
}

Any help please how to achieve this ? I really have no idea how to do it, and don’t found any solutions in internet.

>Solution :

I am assuming you are tying to filter out the original object. Hence, You can simply achieve it by using Array.forEach() method along with the Array.splice().

Live Demo :

const clientData = {
  1111 : [
    {ID : 112, name : 'John',age : 23},
    {ID : 113, name : 'Doe',age : 21},
    {ID : 114, name : 'Stan',age : 24},
  ],
  2222 : [
    {ID : 222, name : 'Sara',age : 15},
    {ID : 223, name : 'Wiliams',age : 61},
    {ID : 224, name : 'Alan',age : 45},
  ]
};

const invalidValues = [112, 223, 114];

Object.keys(clientData).forEach(key => {
    clientData[key].forEach((obj, index) => {
    if (invalidValues.includes(obj.ID)) {
        clientData[key].splice(index, 1);
    }
  })
});

console.log(clientData);