effect-io-ai

Package: effect
Module: Array

Array.flatMapNullishOr

Maps each element with a nullable-returning function, keeping only non-null / non-undefined results.

When to use

Use when you need to map and filter in one step, where the mapper can return null or undefined to skip elements.

Example (Flat mapping with nullable values)

import { Array } from "effect"

console.log(Array.flatMapNullishOr([1, 2, 3], (n) => (n % 2 === 0 ? null : n)))
// [1, 3]

See

• flatMap for mapping each element to an array and flattening
• fromNullishOr for converting a single nullable value to an array

Signature

declare const flatMapNullishOr: { <A, B>(f: (a: A) => B): (self: ReadonlyArray<A>) => Array<NonNullable<B>>; <A, B>(self: ReadonlyArray<A>, f: (a: A) => B): Array<NonNullable<B>>; }

Source

Since v4.0.0