takeRightWhile (Functional Programming)

Creates a function that takes trailing values while a predicate passes. Use it with pipe.

typescript

const result = pipe(array, takeRightWhile(predicate));

::: info

Prefer the original es-toolkit takeRightWhile in ordinary code. Use this fp variant when composing transformations with pipe.

:::

Usage

takeRightWhile walks the piped array from the end and keeps values while predicate returns true. It stops at the first value that does not pass.

typescript

import { pipe, takeRightWhile } from 'es-toolkit/fp';

pipe(
  [1, 2, 3, 4],
  takeRightWhile(value => value > 2)
); // => [3, 4]

Parameters

predicate ((item: T) => boolean): The function that decides whether a trailing value should be kept.

Returns

((array: readonly T[]) => T[]): A function that maps a readonly T[] to the trailing values that pass.