Wrappers : Monoid

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All new develpoment on cyclops occurs in cyclops-react. Older modules are still available in maven central.

The Monoid Wrapper

com.aol.cyclops.lambda.api.Monoid is a generic interface that can define or wrap around a Monoid ( implementations are provided by libraries such as Functional Java or can be created via Monoid.of).

Wrapping (coercing) to Monoid

Monoids can be coerced to the generic Monoid interface via

• AsMonoid.asMonoid
• As.asMonoid

Monoid operations

com.aol.cyclops.lambda.api.Monoid provides

The monoid methods / functions

• zero
• combiner()

And

• reduce : reduce a Stream - the method signature of Stream.reduce is a monoid
• mapReduce : maps to appropriate type before reduction

Rationale

Provide a generic way to define and reuse Monoids in Java (principally for Stream Reduction).