cyclops.function

Interface Semigroup<T>

Type Parameters:

T - Data type of elements to be combined

All Superinterfaces:

java.util.function.BiFunction<T,T,T>, BinaryFn<T>, java.util.function.BinaryOperator<T>, Fn2<T,T,T>

All Known Subinterfaces:

Group<T>, GroupK<W,T>, Monoid<T>, MonoidK<W,T>, Reducer<T>, SemigroupK<W,T>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface Semigroup<T>
extends BinaryFn<T>, java.util.function.BinaryOperator<T>

An (associative) binary operation for combining values. Implementations should obey associativity laws.

Nested Class Summary

Nested classes/interfaces inherited from interface cyclops.function.Fn2

Fn2.FunctionalOperations<T1,T2,R>

Method Summary

Modifier and Type	Method and Description
T	apply(T t, T u)
default <W,R> SemigroupK<W,R>	toSemigroupK(Kleisli<W,T,R> widen, Cokleisli<W,R,T> narrow) Example

Methods inherited from interface java.util.function.BinaryOperator

maxBy, minBy

Methods inherited from interface cyclops.function.Fn2

andThen, apply, curry, fnOps, lift, lift, liftF, liftOpt, liftTry, memoize, memoize, memoizeAsync, memoizeAsync, reverse, λ, λv

Method Detail

apply

T apply(T t,
        T u)

Specified by:

apply in interface java.util.function.BiFunction<T,T,T>

Specified by:

apply in interface Fn2<T,T,T>

toSemigroupK

default <W,R> SemigroupK<W,R> toSemigroupK(Kleisli<W,T,R> widen,
                                           Cokleisli<W,R,T> narrow)

Example

     

        Semigroup<Maybe<Integer>> m = Semigroups.combineZippables(Semigroups.intMax);
              SemigroupK<maybe, Integer> x = m.toSemigroupK(Maybe.kindKleisli(), Maybe.kindCokleisli());