public static class PersistentQueueX.Instances
extends java.lang.Object
Constructor and Description |
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Instances() |
Modifier and Type | Method and Description |
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static InstanceDefinitions<Witness.persistentQueueX> |
definitions() |
static <T,R> Foldable<Witness.persistentQueueX> |
foldable()
int sum = PQueues.foldable()
.foldLeft(0, (a,b)->a+b, Arrays.asPQueue(1,2,3,4)));
//10
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static <T,R> Functor<Witness.persistentQueueX> |
functor()
Transform a list, mulitplying every element by 2
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static <T,R> Monad<Witness.persistentQueueX> |
monad()
import static com.aol.cyclops.hkt.jdk.PersistentQueueX.widen;
PersistentQueueX<Integer> list = PQueues.monad()
.flatMap(i->widen(PersistentQueueX.range(0,i)), widen(Arrays.asPQueue(1,2,3)))
.convert(PersistentQueueX::narrowK3);
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static <T> MonadPlus<Witness.persistentQueueX> |
monadPlus()
PersistentQueueX<Integer> list = PQueues.<Integer>monadPlus()
.plus(Arrays.asPQueue()), Arrays.asPQueue(10)))
.convert(PersistentQueueX::narrowK3);
//Arrays.asPQueue(10))
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static <T> MonadPlus<Witness.persistentQueueX> |
monadPlus(Monoid<PersistentQueueX<T>> m)
Monoid<PersistentQueueX<Integer>> m = Monoid.of(Arrays.asPQueue()), (a,b)->a.isEmpty() ? b : a);
PersistentQueueX<Integer> list = PQueues.<Integer>monadPlus(m)
.plus(Arrays.asPQueue(5)), Arrays.asPQueue(10)))
.convert(PersistentQueueX::narrowK3);
//Arrays.asPQueue(5))
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static <T,R> MonadRec<Witness.persistentQueueX> |
monadRec() |
static <T,R> MonadZero<Witness.persistentQueueX> |
monadZero()
PersistentQueueX<String> list = PQueues.unit()
.unit("hello")
.applyHKT(h->PQueues.monadZero().filter((String t)->t.startsWith("he"), h))
.convert(PersistentQueueX::narrowK3);
//Arrays.asPQueue("hello"));
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static <C2,T> Traverse<Witness.persistentQueueX> |
traverse() |
static Unfoldable<Witness.persistentQueueX> |
unfoldable() |
static <T> Pure<Witness.persistentQueueX> |
unit()
PersistentQueueX<String> list = PQueues.unit()
.unit("hello")
.convert(PersistentQueueX::narrowK3);
//Arrays.asPQueue("hello"))
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static <T,R> Applicative<Witness.persistentQueueX> |
zippingApplicative()
import static com.aol.cyclops.hkt.jdk.PersistentQueueX.widen;
import static com.aol.cyclops.util.function.Lambda.l1;
import static java.util.Arrays.asPQueue;
PQueues.zippingApplicative()
.ap(widen(asPQueue(l1(this::multiplyByTwo))),widen(asPQueue(1,2,3)));
//[2,4,6]
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public static InstanceDefinitions<Witness.persistentQueueX> definitions()
public static Unfoldable<Witness.persistentQueueX> unfoldable()
public static <T,R> Functor<Witness.persistentQueueX> functor()
PersistentQueueX<Integer> list = PQueues.functor().map(i->i*2, Arrays.asPQueue(1,2,3));
//[2,4,6]
An example fluent api working with PQueues
PersistentQueueX<Integer> list = PQueues.unit()
.unit("hello")
.applyHKT(h->PQueues.functor().map((String v) ->v.length(), h))
.convert(PersistentQueueX::narrowK3);
public static <T> Pure<Witness.persistentQueueX> unit()
PersistentQueueX<String> list = PQueues.unit()
.unit("hello")
.convert(PersistentQueueX::narrowK3);
//Arrays.asPQueue("hello"))
public static <T,R> Applicative<Witness.persistentQueueX> zippingApplicative()
import static com.aol.cyclops.hkt.jdk.PersistentQueueX.widen;
import static com.aol.cyclops.util.function.Lambda.l1;
import static java.util.Arrays.asPQueue;
PQueues.zippingApplicative()
.ap(widen(asPQueue(l1(this::multiplyByTwo))),widen(asPQueue(1,2,3)));
//[2,4,6]
Example fluent API
PersistentQueueX<Function<Integer,Integer>> listFn =PQueues.unit()
.unit(Lambda.l1((Integer i) ->i*2))
.convert(PersistentQueueX::narrowK3);
PersistentQueueX<Integer> list = PQueues.unit()
.unit("hello")
.applyHKT(h->PQueues.functor().map((String v) ->v.length(), h))
.applyHKT(h->PQueues.zippingApplicative().ap(listFn, h))
.convert(PersistentQueueX::narrowK3);
//Arrays.asPQueue("hello".length()*2))
public static <T,R> Monad<Witness.persistentQueueX> monad()
import static com.aol.cyclops.hkt.jdk.PersistentQueueX.widen;
PersistentQueueX<Integer> list = PQueues.monad()
.flatMap(i->widen(PersistentQueueX.range(0,i)), widen(Arrays.asPQueue(1,2,3)))
.convert(PersistentQueueX::narrowK3);
Example fluent API
PersistentQueueX<Integer> list = PQueues.unit()
.unit("hello")
.applyHKT(h->PQueues.monad().flatMap((String v) ->PQueues.unit().unit(v.length()), h))
.convert(PersistentQueueX::narrowK3);
//Arrays.asPQueue("hello".length())
public static <T,R> MonadZero<Witness.persistentQueueX> monadZero()
PersistentQueueX<String> list = PQueues.unit()
.unit("hello")
.applyHKT(h->PQueues.monadZero().filter((String t)->t.startsWith("he"), h))
.convert(PersistentQueueX::narrowK3);
//Arrays.asPQueue("hello"));
public static <T> MonadPlus<Witness.persistentQueueX> monadPlus()
PersistentQueueX<Integer> list = PQueues.<Integer>monadPlus()
.plus(Arrays.asPQueue()), Arrays.asPQueue(10)))
.convert(PersistentQueueX::narrowK3);
//Arrays.asPQueue(10))
public static <T,R> MonadRec<Witness.persistentQueueX> monadRec()
public static <T> MonadPlus<Witness.persistentQueueX> monadPlus(Monoid<PersistentQueueX<T>> m)
Monoid<PersistentQueueX<Integer>> m = Monoid.of(Arrays.asPQueue()), (a,b)->a.isEmpty() ? b : a);
PersistentQueueX<Integer> list = PQueues.<Integer>monadPlus(m)
.plus(Arrays.asPQueue(5)), Arrays.asPQueue(10)))
.convert(PersistentQueueX::narrowK3);
//Arrays.asPQueue(5))
m
- Monoid to use for combining PQueuespublic static <C2,T> Traverse<Witness.persistentQueueX> traverse()
public static <T,R> Foldable<Witness.persistentQueueX> foldable()
int sum = PQueues.foldable()
.foldLeft(0, (a,b)->a+b, Arrays.asPQueue(1,2,3,4)));
//10