effect-io-ai

Package: effect
Module: Array

Array.filterMap

Keeps transformed values for elements where a Filter succeeds.

When to use

Use to filter an iterable with a Result-returning transformation while discarding failures.

Details

The filter receives (element, index). Failures are discarded.

Example (Filtering and transforming)

import { Array, Result } from "effect"

console.log(Array.filterMap([1, 2, 3, 4], (n) => n % 2 === 0 ? Result.succeed(n * 10) : Result.failVoid))
// [20, 40]

See

• filter — keep original elements matching a predicate
• partition for keeping both failures and successes

Signature

declare const filterMap: { <A, B, X>(f: (input: NoInfer<A>, i: number) => Result.Result<B, X>): (self: Iterable<A>) => Array<B>; <A, B, X>(self: Iterable<A>, f: (input: A, i: number) => Result.Result<B, X>): Array<B>; }

Source

Since v2.0.0