findLastIndexOr

function Array.findLastIndexOr<T, U>(
    target: readonly T[],
    predicate: (
        value: NoInfer<T>,
        index: number,
        target: readonly NoInfer<T>[],
    ) => boolean,
    or: U,
): number | U

Returns the index of the last element in target that satisfies the provided predicate function. If no element satisfies the predicate, returns or.

Example

data-first

import { Array } from "@monstermann/array";

Array.findLastIndexOr([1, 3, 2, 4], (x) => x > 2, -1); // 3
Array.findLastIndexOr([1, 2, 3, 4], (x) => x > 5, -1); // -1

data-last

import { Array } from "@monstermann/array";

pipe(
    [1, 3, 2, 4],
    Array.findLastIndexOr((x) => x > 2, -1),
); // 3

pipe(
    [1, 2, 3, 4],
    Array.findLastIndexOr((x) => x > 5, -1),
); // -1