replaceLastOrElse

function Array.replaceLastOrElse<T, U>(
    target: readonly T[],
    value: NoInfer<T>,
    replacement: NoInfer<T>,
    orElse: (target: readonly NoInfer<T>[]) => U,
): readonly T[] | U

Replaces the last occurrence of value in target with replacement. If value is not found, calls orElse with the original array.

Example

data-first

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

Array.replaceLastOrElse([1, 2, 3, 2], 2, 9, () => []); // [1, 2, 3, 9]
Array.replaceLastOrElse([1, 2, 3], 4, 9, (arr) => arr); // [1, 2, 3]

data-last

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

pipe(
    [1, 2, 3, 2],
    Array.replaceLastOrElse(2, 9, () => []),
); // [1, 2, 3, 9]

pipe(
    [1, 2, 3],
    Array.replaceLastOrElse(4, 9, (arr) => arr),
); // [1, 2, 3]