Collections

removeDuplicatesByKey

Legacy last-wins deduplication.

Use it in your component

Standalone component

import { Component } from '@angular/core';
import { JsonPipe } from '@angular/common';
import { RemoveDuplicatesByKeyPipe } from 'extra-pipe';

@Component({
  standalone: true,
  imports: [RemoveDuplicatesByKeyPipe, JsonPipe],
  template: `{{ itemsWithDuplication | removeDuplicatesByKey: 'name' | json }}`,
})
export class ExampleComponent {
readonly itemsWithDuplication = [{id:1,name:'Item 1'},{id:2,name:'Item 3'},{id:3,name:'Item 3'}];
}

Template

{{ itemsWithDuplication | removeDuplicatesByKey: 'name' | json }}

Try it live.

The output below runs the packed library. Edit data, not code.

Input (JSON)Use double quotes for text, or a number, array, object or null.

Parameters (JSON array)Ordered parameters: key. Locale is controlled separately.

Output localeThis pipe has no locale override.

Live template data

readonly value = [
  {
    "id": 1,
    "name": "Item 1"
  },
  {
    "id": 2,
    "name": "Item 3"
  },
  {
    "id": 3,
    "name": "Item 3"
  }
] as const;
readonly parameter0 = "name";
{{ value | removeDuplicatesByKey: parameter0 | json }}

Rendered output

[
  {
    "id": 1,
    "name": "Item 1"
  },
  {
    "id": 3,
    "name": "Item 3"
  }
]