public static final class Option.Some<T> extends java.lang.Object implements Option<T>, Present<T>
Option.Comprehensions, Option.None<T>, Option.Some<T>| Constructor and Description |
|---|
Some() |
| Modifier and Type | Method and Description |
|---|---|
boolean |
equals(java.lang.Object obj) |
Option<T> |
filter(java.util.function.Predicate<? super T> fn)
Keep only elements for which the supplied predicates hold
e.g.
|
<R> Option<R> |
flatMap(java.util.function.Function<? super T,? extends MonadicValue<? extends R>> mapper)
A flattening transformation operation (@see
Optional.flatMap(Function) |
<R> R |
fold(java.util.function.Function<? super T,? extends R> fn1,
java.util.function.Function<? super Option.None<T>,? extends R> fn2) |
<R> R |
fold(java.util.function.Function<? super T,? extends R> some,
java.util.function.Supplier<? extends R> none) |
T |
get() |
int |
hashCode() |
boolean |
isPresent() |
<R> Option<R> |
map(java.util.function.Function<? super T,? extends R> mapper)
Transform this functor using the supplied transformation function
|
T |
orElse(T alt) |
Option<T> |
recover(java.util.function.Supplier<? extends T> value) |
Option<T> |
recover(T value) |
Option<T> |
recoverWith(java.util.function.Supplier<? extends Option<T>> fn) |
java.lang.String |
toString() |
clone, finalize, getClass, notify, notifyAll, wait, wait, waitaccumulateJust, accumulateJust, accumulateJust, attempt, attemptFlatMap, concatMap, eager, emptyUnit, filterNot, forEach2, forEach2, forEach3, forEach3, forEach4, forEach4, fromFuture, fromIterable, fromNullable, fromOptional, fromPublisher, fromStream, lazy, mergeMap, narrow, narrowK, none, notNull, of, ofNullable, ofType, orElseUse, peek, sequence, sequence, sequence, sequenceJust, some, tailRec, toMaybe, toTrampoline, traverse, unit, widen, widen2, zip, zip, zip, zip3, zip3, zip4, zip4, zipWithPublisherorElseUsearity, attemptMap, mapAsync, mapRetry, mapRetry, mapTry, mapTryasSupplier, collect, fold, forEach, generate, iterate, iterator, mkString, nonEmptyList, nonEmptyListGet, orElseGet, print, print, printErr, printOut, stream, subscribe, toEither, toLazyEither, toLeft, toOption, toOptional, toRight, toTry, toTry, toTrypublic T get()
public boolean isPresent()
public Option<T> recoverWith(java.util.function.Supplier<? extends Option<T>> fn)
recoverWith in interface Option<T>public <R> Option<R> map(java.util.function.Function<? super T,? extends R> mapper)
Transformable
of(1,2,3).map(i->i*2)
//[2,4,6]
map in interface Transformable<T>map in interface MonadicValue<T>map in interface Option<T>mapper - Transformation functionpublic <R> Option<R> flatMap(java.util.function.Function<? super T,? extends MonadicValue<? extends R>> mapper)
MonadicValueOptional.flatMap(Function)
Eval.now(1).map(i->i+2).flatMap(i->Eval.later(()->i*3);
//Eval[9]
public <R> R fold(java.util.function.Function<? super T,? extends R> some, java.util.function.Supplier<? extends R> none)
public Option<T> filter(java.util.function.Predicate<? super T> fn)
Filters
of(1,2,3).filter(i->i>2);
//[3]
public java.lang.String toString()
toString in class java.lang.Objectpublic int hashCode()
hashCode in class java.lang.Objectpublic boolean equals(java.lang.Object obj)
equals in class java.lang.Objectpublic <R> R fold(java.util.function.Function<? super T,? extends R> fn1, java.util.function.Function<? super Option.None<T>,? extends R> fn2)
fold in interface Sealed2<T,Option.None<T>>