oalg-base-1.1.4.0: Algebraic structures on oriented entities and limits as a tool kit to solve algebraic problems.

Copyright	(c) Erich Gut
License	BSD3
Maintainer	zerich.gut@gmail.com
Safe Haskell	Safe-Inferred
Language	Haskell2010

OAlg.Data.Maybe

Description

Maybe.

Synopsis

module Data.Maybe
just :: (a -> Bool) -> a -> Maybe a
exstJust :: [Maybe v] -> Maybe [v]

Documentation

module Data.Maybe

just :: (a -> Bool) -> a -> Maybe a Source #

just p a == Just a if and only if p a.

exstJust :: [Maybe v] -> Maybe [v] Source #

gets all the Justs - if there are any.