how to use the uniqwith function from the lodash library in typescript

To use uniqWith from the lodash library in TypeScript, you will need to install the library and its type definitions in your project:

npm install --save lodash @types/lodash
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Then, to use uniqWith, you can import it and specify the comparison function:

index.ts
import * as _ from 'lodash';

interface Person {
  id: number;
  name: string;
}

const people: Person[] = [
  { id: 1, name: 'Alice' },
  { id: 2, name: 'Bob' },
  { id: 1, name: 'Charlie' }
];

// Compare by ID
const isPersonEqual = (a: Person, b: Person) => a.id === b.id;

// Get unique people by ID
const uniquePeople = _.uniqWith(people, isPersonEqual);
console.log(uniquePeople); // [{ id: 1, name: 'Alice' }, { id: 2, name: 'Bob' }]
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In this example, uniqWith is used to get a unique list of Person objects by comparing them by their id property. The comparison function isPersonEqual is a custom function that takes two Person objects and returns a boolean indicating whether they are equal.

By default, uniqWith uses _.isEqual for object comparison, which performs a deep comparison of object properties. However, you can supply your own comparison function if you need to compare objects differently.