import { getDuplicates } from '@aegenet/belt-array-duplicates';

const results = getDuplicates([1, 1, 2]);
// results = [1]

const results = getDuplicates([1, 1, 2, 3, 4, 4]);
// results = [1, 4]

import { stripDuplicates } from '@aegenet/belt-array-duplicates';

const results = stripDuplicates([{ id: 1 }, { id: 1 }, { id: 2 }], {
  compare: (a, b) => a.id === b.id,
  sorted: true,
}),
// results = [{ id: 1 }, { id: 2 }]

const a = { id: 1 };
const b = { id: 2 };
const results = stripDuplicates([a, a, b]),
// results = [{ id: 1 }, { id: 2 }]