Provide an iterator over the contents of two lists simultaneously?

Question

Suppose I have this:

public class Unit {

    ...

    List mobileSuits;
    List pilots;

    ...
}
         


        

Answer 1

Came across this page trying to solve this issue, and turns out that there's a library out there that's already solved it using Java 8 streams (check out the Zip function).

You can convert a list to a stream just by calling list.stream()

https://github.com/poetix/protonpack

Stream streamA = Stream.of("A", "B", "C");
Stream streamB  = Stream.of("Apple", "Banana", "Carrot", "Doughnut");
List zipped = StreamUtils.zip(streamA,
                                      streamB,
                                      (a, b) -> a + " is for " + b)
                                 .collect(Collectors.toList());

assertThat(zipped,
           contains("A is for Apple", "B is for Banana", "C is for Carrot"));