Transformers<T, E> extension

Transforming contained values

on

• Result<T, E>

Methods

map<U>(U okMap(T value)) → Result<U, E>

Maps a Result<T, E> to Result<U, E> by applying a function to a contained ok (success) value, and leaving an err (failure) value untouched.

mapErr<F>(F errMap(E error)) → Result<T, F>

Maps a Result<T, E> to Result<T, F> by applying a function to a contained err (failure) value, leaving an ok (success) value untouched.

mapOr<U>({required U fallback, required U okMap(T value)}) → U

Returns the provided fallback (if err (failure)), or applies a function to the contained value (if ok (success)).

mapOrElse<U>({required U errMap(E error), required U okMap(T value)}) → U

Maps a Result<T, E> to U by applying fallback function fallback to a contained err (failure) value, or function op to a contained ok (success) value.