T
- public interface Eval<T> extends java.util.function.Supplier<T>, MonadicValue1<T>, Functor<T>, Filterable<T>, ApplicativeFunctor<T>, Matchable.ValueAndOptionalMatcher<T>
public void odd(){
System.out.println(even(Eval.now(200000)).get());
}
public Eval<String> odd(Eval<Integer> n ) {
return n.flatMap(x->even(Eval.now(x-1)));
}
public Eval<String> even(Eval<Integer> n ) {
return n.flatMap(x->{
return x<=0 ? Eval.now("done") : odd(Eval.now(x-1));
});
}
Modifier and Type | Interface and Description |
---|---|
static class |
Eval.Module |
ApplicativeFunctor.Applicatives, ApplicativeFunctor.ApplyFunctions<T>
Value.ValueImpl<T>
Convertable.SupplierToConvertable<T>
Modifier and Type | Method and Description |
---|---|
static <T,R> Eval<R> |
accumulate(CollectionX<Eval<T>> maybes,
java.util.function.Function<? super T,R> mapper,
Semigroup<R> reducer) |
static <T,R> Eval<R> |
accumulate(CollectionX<Eval<T>> evals,
Reducer<R> reducer) |
static <T> Eval<T> |
accumulate(CollectionX<Eval<T>> maybes,
Semigroup<T> reducer) |
static <T> Eval<T> |
always(java.util.function.Supplier<T> value)
Lazily create an Eval from the specified Supplier.
|
default <U> Eval<U> |
cast(java.lang.Class<? extends U> type)
Cast all elements in a stream to a given type, possibly throwing a
ClassCastException . |
default <R> Eval<R> |
coflatMap(java.util.function.Function<? super MonadicValue<T>,R> mapper) |
default <T2,R> Eval<R> |
combine(Value<? extends T2> app,
java.util.function.BiFunction<? super T,? super T2,? extends R> fn)
Lazily combine this ApplicativeFunctor with the supplied value via the supplied BiFunction
|
default Eval<T> |
combineEager(Monoid<T> monoid,
MonadicValue<? extends T> v2)
Eagerly combine two MonadicValues using the supplied monoid (@see ApplicativeFunctor for type appropraite i.e.
|
default Maybe<T> |
filter(java.util.function.Predicate<? super T> pred)
Keep only elements for which the supplied predicates hold
e.g.
|
default Maybe<T> |
filterNot(java.util.function.Predicate<? super T> fn)
Remove any elements for which the predicate holds (inverse operation to filter)
e.g.
|
<R> Eval<R> |
flatMap(java.util.function.Function<? super T,? extends MonadicValue<? extends R>> mapper) |
static <T> Eval<T> |
fromIterable(java.lang.Iterable<T> iterable)
Create an Eval instance from an Iterable
|
static <T> Eval<T> |
fromPublisher(org.reactivestreams.Publisher<T> pub)
Create an Eval instance from a reactive-streams publisher
|
T |
get() |
static <T> Eval<T> |
later(java.util.function.Supplier<T> value)
Lazily create an Eval from the specified Supplier.
|
<R> Eval<R> |
map(java.util.function.Function<? super T,? extends R> mapper)
Transform this functor using the supplied transformation function
|
static <R> Eval<R> |
narrow(Eval<? extends R> broad)
Narrow covariant type parameter
|
default Eval<MonadicValue<T>> |
nest() |
default Maybe<T> |
notNull()
Filter elements retaining only values which are not null
|
static <T> Eval<T> |
now(T value)
Create an Eval with the value specified
|
default <U> Maybe<U> |
ofType(java.lang.Class<? extends U> type)
Keep only those elements in a stream that are of a given type.
|
default Eval<T> |
peek(java.util.function.Consumer<? super T> c)
Peek at the current value of this Functor, without transforming it
|
static <T> Eval<ListX<T>> |
sequence(CollectionX<Eval<T>> evals)
Turn a collection of Evals into a single Eval with a List of values.
|
static <T> Eval<ReactiveSeq<T>> |
sequence(java.util.stream.Stream<Eval<T>> evals)
Turn a Stream of Evals into a single Eval with a Stream of values.
|
default PVectorX<java.util.function.Function<java.lang.Object,java.lang.Object>> |
steps() |
default <R> Eval<R> |
trampoline(java.util.function.Function<? super T,? extends Trampoline<? extends R>> mapper)
Performs a map operation that can call a recursive method without running out of stack space
|
<T> Eval<T> |
unit(T unit) |
default <R> R |
visit(java.util.function.Function<? super T,? extends R> present,
java.util.function.Supplier<? extends R> absent) |
default <T2,R> Eval<R> |
zip(java.util.function.BiFunction<? super T,? super T2,? extends R> fn,
org.reactivestreams.Publisher<? extends T2> app)
Zip (combine) this Zippable with the supplied Publisher, using the supplied combining function
|
default <T2,R> Eval<R> |
zip(java.lang.Iterable<? extends T2> app,
java.util.function.BiFunction<? super T,? super T2,? extends R> fn)
Zip (combine) this Zippable with the supplied Iterable using the supplied combining function
|
default <U> Eval<org.jooq.lambda.tuple.Tuple2<T,U>> |
zip(java.lang.Iterable<? extends U> other)
Zip (combine) this Zippable with the supplied Iterable combining both into a Tuple2
|
default <U> Eval<org.jooq.lambda.tuple.Tuple2<T,U>> |
zip(org.jooq.lambda.Seq<? extends U> other)
Zip (combine) this Zippable with the supplied Seq combining both into a Tuple2
|
default <U,R> Eval<R> |
zip(org.jooq.lambda.Seq<? extends U> other,
java.util.function.BiFunction<? super T,? super U,? extends R> zipper)
Zip (combine) this Zippable with the supplied Seq, using the supplied combining function
|
default <U> Eval<org.jooq.lambda.tuple.Tuple2<T,U>> |
zip(java.util.stream.Stream<? extends U> other)
Zip (combine) this Zippable with the supplied Stream combining both into a Tuple2
|
default <U,R> Eval<R> |
zip(java.util.stream.Stream<? extends U> other,
java.util.function.BiFunction<? super T,? super U,? extends R> zipper)
Zip (combine) this Zippable with the supplied Stream, using the supplied combining function
|
anyM
applyFunctions
collect, fold, fold, generate, iterate, iterator, mapReduce, mkString, newSubscriber, of, stream, subscribe, test, toDequeX, toEvalAlways, toEvalLater, toEvalNow, toFeatureToggle, toFutureStream, toFutureStream, toIor, toLazyImmutable, toList, toListX, toMaybe, toMutable, toPBagX, toPOrderedSetX, toPQueueX, toPSetX, toPStackX, toPVectorX, toQueueX, toSetX, toSimpleReact, toSimpleReact, toSortedSetX, toTry, toTry, toTry, toXor, toXor, unapply
endsWith, endsWithIterable, findAny, findFirst, firstValue, foldable, foldRight, foldRight, foldRight, foldRightMapToType, get, groupBy, join, join, join, mapReduce, print, print, printErr, printOut, reduce, reduce, reduce, reduce, reduce, reduce, reduce, schedule, scheduleFixedDelay, scheduleFixedRate, single, single, singleOptional, startsWith, startsWithIterable, toConcurrentLazyCollection, toConcurrentLazyStreamable, toLazyCollection, validate, xMatch
collect, fromSupplier, isPresent, orElse, orElseGet, orElseThrow, toAtomicReference, toCompletableFuture, toCompletableFutureAsync, toCompletableFutureAsync, toFutureW, toFutureWAsync, toFutureWAsync, toOptional, toOptionalAtomicReference, toStream
iterator, toOptional
matches
static <T> Eval<T> fromPublisher(org.reactivestreams.Publisher<T> pub)
Eval<Integer> e = Eval.fromPublisher(Mono.just(10));
//Eval[10]
pub
- Publisher to create the Eval fromstatic <T> Eval<T> fromIterable(java.lang.Iterable<T> iterable)
Eval<Integer> e = Eval.fromIterable(Arrays.asList(10));
//Eval[10]
iterable
- to create the Eval fromstatic <T> Eval<T> now(T value)
Eval<Integer> e = Eval.now(10);
//Eval[10]
value
- of Evalstatic <T> Eval<T> later(java.util.function.Supplier<T> value)
Eval<Integer> e = Eval.later(()->10)
.map(i->i*2);
//Eval[20] - lazy so will not be executed until the value is accessed
value
- Supplier to (lazily) populate this Evalstatic <T> Eval<T> always(java.util.function.Supplier<T> value)
Eval<Integer> e = Eval.always(()->10)
.map(i->i*2);
//Eval[20] - lazy so will not be executed until the value is accessed
value
- Supplier to (lazily) populate this Evalstatic <T> Eval<ListX<T>> sequence(CollectionX<Eval<T>> evals)
Eval<ListX<Integer>> maybes =Eval.sequence(ListX.of(Eval.now(10),Eval.now(1)));
//Eval.now(ListX.of(10,1)));
evals
- Collection of evals to convert into a single eval with a List of valuesstatic <T> Eval<ReactiveSeq<T>> sequence(java.util.stream.Stream<Eval<T>> evals)
Eval<ReactiveSeq<Integer>> maybes =Eval.sequence(Stream.of(Eval.now(10),Eval.now(1)));
//Eval.now(ReactiveSeq.of(10,1)));
evals
- Collection of evals to convert into a single eval with a List of valuesstatic <T,R> Eval<R> accumulate(CollectionX<Eval<T>> evals, Reducer<R> reducer)
static <T,R> Eval<R> accumulate(CollectionX<Eval<T>> maybes, java.util.function.Function<? super T,R> mapper, Semigroup<R> reducer)
static <T> Eval<T> accumulate(CollectionX<Eval<T>> maybes, Semigroup<T> reducer)
<T> Eval<T> unit(T unit)
unit
in interface MonadicValue<T>
unit
in interface MonadicValue1<T>
unit
in interface Unit<T>
<R> Eval<R> map(java.util.function.Function<? super T,? extends R> mapper)
Functor
of(1,2,3).map(i->i*2)
//[2,4,6]
map
in interface ConvertableFunctor<T>
map
in interface Functor<T>
map
in interface MonadicValue<T>
map
in interface MonadicValue1<T>
mapper
- Transformation function<R> Eval<R> flatMap(java.util.function.Function<? super T,? extends MonadicValue<? extends R>> mapper)
flatMap
in interface MonadicValue1<T>
default PVectorX<java.util.function.Function<java.lang.Object,java.lang.Object>> steps()
default <R> Eval<R> coflatMap(java.util.function.Function<? super MonadicValue<T>,R> mapper)
coflatMap
in interface MonadicValue<T>
coflatMap
in interface MonadicValue1<T>
default Eval<T> combineEager(Monoid<T> monoid, MonadicValue<? extends T> v2)
MonadicValue1
Monoid<Integer> add = Monoid.of(1,Semigroups.intSum);
Maybe.of(10).combineEager(add,Maybe.none());
//Maybe[10]
Maybe.none().combineEager(add,Maybe.of(10));
//Maybe[10]
Maybe.none().combineEager(add,Maybe.none());
//Maybe.none()
Maybe.of(10).combineEager(add,Maybe.of(10));
//Maybe[20]
Monoid<Integer> firstNonNull = Monoid.of(null , Semigroups.firstNonNull());
Maybe.of(10).combineEager(firstNonNull,Maybe.of(10));
//Maybe[10]
combineEager
in interface MonadicValue1<T>
default Eval<MonadicValue<T>> nest()
nest
in interface MonadicValue<T>
T get()
get
in interface Convertable<T>
get
in interface java.util.function.Supplier<T>
default <U> Maybe<U> ofType(java.lang.Class<? extends U> type)
Filterable
// (1, 2, 3) ReactiveSeq.of(1, "a", 2, "b",3).ofType(Integer.class)
ofType
in interface Filterable<T>
default Maybe<T> filterNot(java.util.function.Predicate<? super T> fn)
Filterable
of(1,2,3).filter(i->i>2);
//[1,2]
filterNot
in interface Filterable<T>
fn
- to filter elements by, retaining matchesdefault Maybe<T> notNull()
Filterable
of(1,2,null,4).nonNull();
//[1,2,4]
notNull
in interface Filterable<T>
default Maybe<T> filter(java.util.function.Predicate<? super T> pred)
Filterable
of(1,2,3).filter(i->i>2);
//[3]
filter
in interface Filterable<T>
pred
- to filter elements by, retaining matchesdefault <U> Eval<U> cast(java.lang.Class<? extends U> type)
Functor
ClassCastException
.
// ClassCastException ReactiveSeq.of(1, "a", 2, "b", 3).cast(Integer.class)default Eval<T> peek(java.util.function.Consumer<? super T> c)
Functor
of(1,2,3).map(System.out::println)
1
2
3
default <R> Eval<R> trampoline(java.util.function.Function<? super T,? extends Trampoline<? extends R>> mapper)
Functor
ReactiveSeq.of(10,20,30,40)
.trampoline(i-> fibonacci(i))
.forEach(System.out::println);
Trampoline<Long> fibonacci(int i){
return fibonacci(i,1,0);
}
Trampoline<Long> fibonacci(int n, long a, long b) {
return n == 0 ? Trampoline.done(b) : Trampoline.more( ()->fibonacci(n-1, a+b, a));
}
55
6765
832040
102334155
ReactiveSeq.of(10_000,200_000,3_000_000,40_000_000)
.trampoline(i-> fibonacci(i))
.forEach(System.out::println);
completes successfully
trampoline
in interface Functor<T>
mapper
- TCO Transformation functiondefault <R> R visit(java.util.function.Function<? super T,? extends R> present, java.util.function.Supplier<? extends R> absent)
visit
in interface Convertable<T>
visit
in interface Matchable.MatchableOptional<T>
visit
in interface Matchable.ValueAndOptionalMatcher<T>
visit
in interface Visitable<T>
static <R> Eval<R> narrow(Eval<? extends R> broad)
broad
- Eval with covariant type parameterdefault <T2,R> Eval<R> combine(Value<? extends T2> app, java.util.function.BiFunction<? super T,? super T2,? extends R> fn)
ApplicativeFunctor
combine
in interface ApplicativeFunctor<T>
app
- Value to combine with this one.fn
- BiFunction to combine themdefault <T2,R> Eval<R> zip(java.lang.Iterable<? extends T2> app, java.util.function.BiFunction<? super T,? super T2,? extends R> fn)
Zippable
default <T2,R> Eval<R> zip(java.util.function.BiFunction<? super T,? super T2,? extends R> fn, org.reactivestreams.Publisher<? extends T2> app)
Zippable
default <U,R> Eval<R> zip(org.jooq.lambda.Seq<? extends U> other, java.util.function.BiFunction<? super T,? super U,? extends R> zipper)
Zippable
default <U,R> Eval<R> zip(java.util.stream.Stream<? extends U> other, java.util.function.BiFunction<? super T,? super U,? extends R> zipper)
Zippable
default <U> Eval<org.jooq.lambda.tuple.Tuple2<T,U>> zip(java.util.stream.Stream<? extends U> other)
Zippable
default <U> Eval<org.jooq.lambda.tuple.Tuple2<T,U>> zip(org.jooq.lambda.Seq<? extends U> other)
Zippable