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

A utility library for TypeScript.

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

//#region src/array/findLastIndexOr.ts
/**
* `findLastIndexOr(target, predicate, or)`
*
* Returns the index of the last element in `target` that satisfies the provided `predicate` function. If no element satisfies the predicate, returns `or`.
*
* ```ts
* findLastIndexOr([1, 3, 2, 4], (x) => x > 2, -1); // 3
* findLastIndexOr([1, 2, 3, 4], (x) => x > 5, -1); // -1
* ```
*
* ```ts
* pipe(
*     [1, 3, 2, 4],
*     findLastIndexOr((x) => x > 2, -1),
* ); // 3
* pipe(
*     [1, 2, 3, 4],
*     findLastIndexOr((x) => x > 5, -1),
* ); // -1
* ```
*/
const findLastIndexOr = dfdlT((target, predicate, or) => {
	const idx = target.findLastIndex(predicate);
	return idx < 0 ? or : idx;
}, 3);

//#endregion
export { findLastIndexOr };