Extensions to the core Result
library.
mapBoth : (e -> f) -> (a -> b) -> Result e a -> Result f b
Apply functions to both sides of a Result
, transforming the error and ok types.
isOk : Result e a -> Basics.Bool
Boolean checks for success/failure.
isErr : Result e a -> Basics.Bool
fromOk : Result e a -> Maybe a
Convert a Result
to a Maybe
.
fromErr : Result e a -> Maybe e
mappend : Result e a -> Result e b -> Result e ( a, b )
Monoidal append - join two Results together as though they were one.
either : (e -> c) -> (a -> c) -> Result e a -> c
Collapse a Result
down to a single value of a single type.
Example:
case result of
Err err -> errorView err
Ok value -> okView value
...is equivalent to:
either errorView okView result