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.
Prelude.deref (3kaya)
Dict.lookup (3kaya)
