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import java.util.Arrays;
import java.util.List;
import java.util.function.BiFunction;
import java.util.function.Function;
import java.util.stream.Stream;
abstract class Play {
public void main(Stream<String> stream, Stream<String> anotherStream) {
Stream<String> stringStream = stream.map(o -> foo(i -> "")).flatMap(l -> l);
}
abstract <RF > Stream<RF> foo(Function<Integer, ? extends RF> mapper);
static int foo() {
return 6;
}
}
class SimplePlay {
{
foo(y -> bar(x -> "")).substring(0);
}
interface Res<R> {
R apply(String s);
}
<T> T foo(Res<T> f) {return null;}
<K> K bar(Res<K> f) {return null;}
}
class Test19 {
interface Seq<E> extends Iterable<E> {
static <E> Seq<E> of(Iterable<? extends E> source) {
return null;
}
<R> Seq<R> map(Function<? super E, ? extends R> mapper);
<R, V> Seq<R> zip(BiFunction<? super E, ? super V, ? extends R> zipper, Seq<V> other);
}
interface S extends Seq<String> {
static S copyOf(Iterable<String> source) {
return null;
}
}
interface D extends S {
}
void test(Seq<D> dseq) {
BiFunction<D, List<Integer>, Seq<S>> f =
(d, nums) -> dseq.map(s -> s.zip((text, num) -> text + num, Seq.of(nums)))
.map(s -> S.copyOf(s));
}
}
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