There are 2 collections: c1 = Arrays.asList("A", "B", "C") and c2 = Arrays.asList("1", "2", "3") . Tell me how to use the Stream API in Java in 1 line to make a collection {"A1", "B2", "C3"} ?

    1 answer 1

    In standard streams, for some reason, there is no zip operation, so you have to resort to debauchery type

     IntStream .range(0, Math.min(c1.size(), c2.size())) .mapToObj(i -> c1.get(i) + c2.get(i)) .forEach(System.out::println);

    But zip is in Guava

     Streams .zip(c1.stream(), c2.stream(), (x, y) -> x + y) .forEach(System.out::println);

    And in StreamEx

     StreamEx.of(c1) .zipWith(StreamEx.of(c2), (x, y) -> x + y) .forEach(System.out::println);