Zipping streams using JDK8 with lambda (java.util.stream.Streams.zip)

Question

In JDK 8 with lambda b93 there was a class java.util.stream.Streams.zip in b93 which could be used to zip streams (this is illustrated in the tutorial Exploring Java8 Lambda

Answer 1

Since I can't conceive any use of zipping on collections other than indexed ones (Lists) and I am a big fan of simplicity, this would be my solution:

  Stream zipped(List lista, List listb, BiFunction zipper){
     int shortestLength = Math.min(lista.size(),listb.size());
     return IntStream.range(0,shortestLength).mapToObj( i -> {
          return zipper.apply(lista.get(i), listb.get(i));
     });        
}