本文整理汇总了Java中io.vavr.collection.Stream.flatMap方法的典型用法代码示例。如果您正苦于以下问题：Java Stream.flatMap方法的具体用法？Java Stream.flatMap怎么用？Java Stream.flatMap使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类io.vavr.collection.Stream的用法示例。
在下文中一共展示了Stream.flatMap方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: forEach4
import io.vavr.collection.Stream; //导入方法依赖的package包/类
/**
* Perform a For Comprehension over a Stream, accepting 3 generating functions.
* This results in a four level nested internal iteration over the provided Publishers.
*
* <pre>
* {@code
*
* import static cyclops.Streams.forEach4;
*
forEach4(IntStream.range(1,10).boxed(),
a-> Stream.iterate(a,i->i+1).limit(10),
(a,b) -> Stream.<Integer>of(a+b),
(a,b,c) -> Stream.<Integer>just(a+b+c),
Tuple::tuple)
*
* }
* </pre>
*
* @param value1 top level Stream
* @param value2 Nested Stream
* @param value3 Nested Stream
* @param value4 Nested Stream
* @param yieldingFunction Generates a result per combination
* @return Stream with an element per combination of nested publishers generated by the yielding function
*/
public static <T1, T2, T3, R1, R2, R3, R> Stream<R> forEach4(Stream<? extends T1> value1,
Function<? super T1, ? extends Stream<R1>> value2,
BiFunction<? super T1, ? super R1, ? extends Stream<R2>> value3,
Function3<? super T1, ? super R1, ? super R2, ? extends Stream<R3>> value4,
Function4<? super T1, ? super R1, ? super R2, ? super R3, ? extends R> yieldingFunction) {
return value1.flatMap(in -> {
Stream<R1> a = value2.apply(in);
return a.flatMap(ina -> {
Stream<R2> b = value3.apply(in,ina);
return b.flatMap(inb -> {
Stream<R3> c = value4.apply(in,ina,inb);
return c.map(in2 -> yieldingFunction.apply(in, ina, inb, in2));
});
});
});
}
示例2: forEach3
import io.vavr.collection.Stream; //导入方法依赖的package包/类
/**
* Perform a For Comprehension over a Stream, accepting 2 generating function.
* This results in a three level nested internal iteration over the provided Publishers.
* <pre>
* {@code
*
* import static Streams.forEach;
*
* forEach(IntStream.range(1,10).boxed(),
a-> Stream.iterate(a,i->i+1).limit(10),
(a,b) -> Stream.<Integer>of(a+b),
(a,b,c) ->a+b+c<10,
Tuple::tuple)
.toStreamX();
* }
* </pre>
*
* @param value1 top level Stream
* @param value2 Nested publisher
* @param value3 Nested publisher
* @param filterFunction A filtering function, keeps values where the predicate holds
* @param yieldingFunction Generates a result per combination
* @return
*/
public static <T1, T2, R1, R2, R> Stream<R> forEach3(Stream<? extends T1> value1,
Function<? super T1, ? extends Stream<R1>> value2,
BiFunction<? super T1, ? super R1, ? extends Stream<R2>> value3,
Function3<? super T1, ? super R1, ? super R2, Boolean> filterFunction,
Function3<? super T1, ? super R1, ? super R2, ? extends R> yieldingFunction) {
return value1.flatMap(in -> {
Stream<R1> a = value2.apply(in);
return a.flatMap(ina -> {
Stream<R2> b = value3.apply(in,ina);
return b.filter(in2->filterFunction.apply(in,ina,in2))
.map(in2 -> yieldingFunction.apply(in, ina, in2));
});
});
}
示例3: forEach2
import io.vavr.collection.Stream; //导入方法依赖的package包/类
/**
* Perform a For Comprehension over a Stream, accepting an additonal generating function.
* This results in a two level nested internal iteration over the provided Publishers.
*
* <pre>
* {@code
*
* import static Streams.forEach2;
* forEach(IntStream.range(1, 10).boxed(),
* i -> Stream.range(i, 10), Tuple::tuple)
.forEach(System.out::println);
//(1, 1)
(1, 2)
(1, 3)
(1, 4)
...
*
* }</pre>
*
* @param value1 top level Stream
* @param value2 Nested publisher
* @param yieldingFunction Generates a result per combination
* @return
*/
public static <T, R1, R> Stream<R> forEach2(Stream<? extends T> value1,
Function<? super T, Stream<R1>> value2,
BiFunction<? super T, ? super R1, ? extends R> yieldingFunction) {
return value1.flatMap(in -> {
Stream<R1> a = value2.apply(in);
return a.map(in2 -> yieldingFunction.apply(in, in2));
});
}