effect-io-ai

Package: effect
Module: Effect

Effect.filterMapOrElse

Filters an effect with a Filter, providing an alternative effect on failure.

When to use

Use when a successful effect value should be accepted and transformed by a Filter, while rejected values should continue with an alternative effect built from the filter failure.

Details

Result.succeed becomes the returned success value, and Result.fail is passed to orElse.

See

• filterOrElse for using a predicate and fallback effect
• filterMapOrFail for failing the effect when the filter fails

Signature

declare const filterMapOrElse: { <A, B, X, C, E2, R2>(filter: Filter.Filter<NoInfer<A>, B, X>, orElse: (x: X) => Effect<C, E2, R2>): <E, R>(self: Effect<A, E, R>) => Effect<B | C, E2 | E, R2 | R>; <A, E, R, B, X, C, E2, R2>(self: Effect<A, E, R>, filter: Filter.Filter<NoInfer<A>, B, X>, orElse: (x: X) => Effect<C, E2, R2>): Effect<B | C, E | E2, R | R2>; }

Source

Since v4.0.0