Prelude.Maybe (3kaya)

Optional values.

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  4. 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 ([email protected]). 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)