Remove duplicates from array of objects - Javascript [duplicate]

Question

Hi I'm trying to remove duplicates from array of objects. But that is not working as expected.

This is my array:

const arr = [{
  PData: [{
      id: '1',
      name: 'Book'
    },
    {
      id: '2',
      name: 'Bag'
    },
    {
      id: '2',
      name: 'Bag'
    },
  ]
}]

const RemoveDuplicates = (array, key) => {
  return array.reduce((arr, item) => {
    const removed = arr.filter(i => i[key] !== item[key]);
    return [...removed, item];
  }, []);
};
var result = RemoveDuplicates(arr, 'id')
console.log(result);

Expected output:

[{
  PData: [{
      id: '1',
      name: 'Book'
    },
    {
      id: '2',
      name: 'Bag'
    },
  ]
}]

Based on id it supposed to remove duplicates but this is not happening currently..I know that couple of questions are existed regarding this but nothing is working for me. So anyone plz suggest me how to do.

The array you want to remove duplicates from is nested in an object but you're only running your function on the 'root' array — Lennholm
– Lennholm, Commented Mar 16, 2020 at 11:49

Manikant Gautam · Accepted Answer · 2020-03-16 13:18:04Z

0

You can use filter here is how on id and name.

const arr = [{
  PData: [{
      id: '1',
      name: 'Book'
    },
    {
      id: '2',
      name: 'Bag'
    },
    {
      id: '2',
      name: 'Bag'
    },
  ]
}]
arr[0].PData = Object.values(arr[0].PData).filter((v,i,a)=>a.findIndex(t=>(t.id === v.id && t.name=== v.name))===i)
console.log(arr[0].PData);

edited Mar 16, 2020 at 13:18

answered Mar 16, 2020 at 11:47

Manikant Gautam

3,5911 gold badge20 silver badges30 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Jayden Over a year ago

But my array is not like that right

Manikant Gautam Over a year ago

@royal see the update

Collectives™ on Stack Overflow

Remove duplicates from array of objects - Javascript [duplicate]

1 Answer 1

2 Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Linked

Related