trusty (3) Prelude.Maybe.3kaya.gz

Provided by: kaya_0.4.4-6ubuntu3_amd64 bug

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)