intersection (Functional Programming)

Creates a function that keeps values found in another array. Use it with pipe.

const result = pipe(array, intersection(secondArray));

INFO

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

Usage

intersection keeps values from the piped array that are also present in secondArray. It preserves the order of the piped array.

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

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

Parameters

• secondArray (readonly T[]): The array containing values to keep.

Returns

((array: readonly T[]) => T[]): A function that maps a readonly T[] to values also found in secondArray.