Prelude.Maybe(3kaya)
NAME
Prelude::Maybe - Optional values.
SYNOPSIS
Prelude::Maybe< a > = nothing() | just(a val)
DESCRIPTION
A value is either of type a , represented as just(a) , or empty. Maybe
is often useful for computations which can possibly fail, for example
looking up values in a dictionary. Because the nothing value can be
stored, this is often more useful than Exceptions on failure.
AUTHORS
Kaya standard library by Edwin Brady, Chris Morris and others
(kaya@kayalang.org). For further information see http://kayalang.org/
LICENSE
The Kaya standard library is free software; you can redistribute it
and/or modify it under the terms of the GNU Lesser General Public
License (version 2.1 or any later version) as published by the Free
Software Foundation.
RELATED
- Prelude.deref (3kaya)
Dict.lookup (3kaya)