How to use

completableFutureToStream

method

in

com.aol.cyclops.streams.StreamUtils

/**
 *<pre>
 * {@code 
 *     assertThat(StreamUtils.flatMapCompletableFuture(Stream.of(1,2,3),
 *                                 i->CompletableFuture.completedFuture(i+2))
 *                                 .collect(Collectors.toList()),
 *                                 equalTo(Arrays.asList(3,4,5)));
 * }
 *</pre>
 */
public final static <T,R> Stream<R> flatMapCompletableFuture(Stream<T> stream,Function<? super T,CompletableFuture<? extends R>> fn) {
  return	stream.flatMap( in->StreamUtils.completableFutureToStream(fn.apply(in)));
  
}

/**
 * flatMap to CompletableFuture - will block until Future complete, although (for non-blocking behaviour use AnyM 
 *       wrapping CompletableFuture and flatMap to Stream there)
 *       
 *  <pre>
 *  {@code
 *      assertThat(SequenceM.of(1,2,3).flatMapCompletableFuture(i->CompletableFuture.completedFuture(i+2))
                       .collect(Collectors.toList()),
                       equalTo(Arrays.asList(3,4,5)));
 *  }
 *  </pre>
 *       
 * @param fn
 * @return
 */
public final <R> SequenceM<R> flatMapCompletableFuture(Function<? super T,CompletableFuture<? extends R>> fn) {
  return new SequenceM<>(monad.flatMap( in->StreamUtils.completableFutureToStream(fn.apply(in))));
}
public final <R> SequenceM<R> flatMapLazySeq(Function<? super T,LazySeq<? extends R>> fn) {