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

A utility library for TypeScript.

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

//#region src/array/lastOrElse.ts
/**
* `lastOrElse(array, callback)`
*
* Returns the last element of `array`, or the result of calling `callback` with the array if the array is empty.
*
* ```ts
* lastOrElse([1, 2, 3, 4], (arr) => arr.length); // 4
* ```
*
* ```ts
* pipe(
*     [1, 2, 3, 4],
*     lastOrElse((arr) => arr.length),
* ); // 4
* ```
*/
const lastOrElse = dfdlT((target, orElse) => {
	return target.at(-1) ?? orElse(target);
}, 2);

//#endregion
export { lastOrElse };