how to filter based on two values from the array of array

Question

I have a bunch array of objects with participants and messages, I want to filter the object with the below array of two participants, can anyone help with this

this is the example participnats of array :

["61badffe4ccf060b329441e0","61bc33a84ccf060b32944354"]

bunch of sample messages and participants :

  {
    "messages": [],
    "participants": [
      "61badffe4ccf060b329441e0",
      "61bae01b4ccf060b329441ef"
    ],
    "_id": "61bae0394ccf060b329441fb",
  },
  {
    "messages": [],
    "participants": [
      "61bae1014ccf060b3294420e",
      "61bae01b4ccf060b329441ef"
    ],
    "_id": "61bb230c4ccf060b3294421c"
  },
  {
    "messages": [],
    "participants": [
      "61badffe4ccf060b329441e0",
      "61bc33a84ccf060b32944354"
    ],
    "_id": "61d476dff651471663a72971",
  },
  {
    "messages": [],
    "participants": [
      "61badffe4ccf060b329441e0",
      "61e54b82eab592e7fef65656"
    ],
    "_id": "61e54ba3eab592e7fef6567a",
]





**expected below object after filter participants:** 

```{
    "messages": [],
    "participants": [
      "61badffe4ccf060b329441e0",
      "61bc33a84ccf060b32944354"
    ],
    "_id": "61d476dff651471663a72971",
  },

Does this answer your question? [Filter array of objects based on another array in javascript](https://stackoverflow.com/questions/46894352/filter-array-of-objects-based-on-another-array-in-javascript) — pilchard, Jan 17 '22 at 11:57

score 1 · Accepted Answer · answered Jan 17 '22 at 11:59

You might wanna use Array.filter() and also in your case you should check every element from that array which should match your criteria.

const input = [{
    "messages": [],
    "participants": [
      "61badffe4ccf060b329441e0",
      "61bae01b4ccf060b329441ef"
    ],
    "_id": "61bae0394ccf060b329441fb",
  },
  {
    "messages": [],
    "participants": [
      "61bae1014ccf060b3294420e",
      "61bae01b4ccf060b329441ef"
    ],
    "_id": "61bb230c4ccf060b3294421c"
  },
  {
    "messages": [],
    "participants": [
      "61badffe4ccf060b329441e0",
      "61bc33a84ccf060b32944354"
    ],
    "_id": "61d476dff651471663a72971",
  },
  {
    "messages": [],
    "participants": [
      "61badffe4ccf060b329441e0",
      "61e54b82eab592e7fef65656"
    ],
    "_id": "61e54ba3eab592e7fef6567a",
    }
];

const filterByParticipants = ["61badffe4ccf060b329441e0","61bc33a84ccf060b32944354"];
const output = input.filter(el => el.participants.every(el => filterByParticipants.includes(el)));

console.log(output);

score 1 · Answer 2 · answered Jan 17 '22 at 12:14

You need to use filter() method of Array Object, to filter it based on certain conditions.
You can then use every() method of participants array, to check if every participant is present in the object.

let obj=[{messages:[],participants:["61badffe4ccf060b329441e0","61bae01b4ccf060b329441ef"],_id:"61bae0394ccf060b329441fb"},{messages:[],participants:["61bae1014ccf060b3294420e","61bae01b4ccf060b329441ef"],_id:"61bb230c4ccf060b3294421c"},{messages:[],participants:["61badffe4ccf060b329441e0","61bc33a84ccf060b32944354"],_id:"61d476dff651471663a72971"},{messages:[],participants:["61badffe4ccf060b329441e0","61e54b82eab592e7fef65656"],_id:"61e54ba3eab592e7fef6567a"}];

let participants =["61badffe4ccf060b329441e0","61bc33a84ccf060b32944354"];

let res = obj.filter((o)=>{
  let oParticipants = o.participants;
  let out = participants.every(p => oParticipants.includes(p))
  return out;
});

console.log(res)

how to filter based on two values from the array of array

2 Answers2