@monstermann/fn/dist/array/unique.js

A utility library for TypeScript.

import { dfdlT } from "@monstermann/dfdl";
import { markAsMutable } from "@monstermann/remmi";

//#region src/array/unique.ts
/**
* `unique(target)`
*
* Returns a new array with only the unique elements from `target`, preserving the order of first occurrence.
*
* ```ts
* unique([1, 2, 2, 3, 1]); // [1, 2, 3]
* ```
*
* ```ts
* pipe([1, 2, 2, 3, 1], unique()); // [1, 2, 3]
* ```
*/
const unique = dfdlT((target) => {
	const set = new Set(target);
	return set.size === target.length ? target : markAsMutable(Array.from(set));
}, 1);

//#endregion
export { unique };