arrow-core/arrow.core/redeemWith

redeemWith

inline fun <A, B> Result<A>.redeemWith(handleErrorWith: (throwable: Throwable) -> Result, transform: (value: A) -> Result): Result

Compose both:

a transform operation on the success value A into B whilst flattening Result.
a recovering transform operation on the failure value Throwable whilst flattening Result.

Combining the powers of flatMap and handleErrorWith.

inline fun <A, B, C, D> Either<A, B>.~~redeemWith~~(fa: (A) -> Either<C, D>, fb: (B) -> Either<C, D>): Either<C, D>

Deprecated

This API is niche and will be removed in the future. If this method is crucial for you, please let us know on the Arrow Github. Thanks! https://github.com/arrow-kt/arrow/issues Prefer using a simple fold, or when expression

Replace with

fold(fa, fb)

inline fun <A, B> Option<A>.~~redeemWith~~(fe: (Unit) -> Option, fb: (A) -> Option): Option

Deprecated

Replace with

import arrow.core.recover

flatMap(fb).recover { fe(Unit).bind() }