List Merge

sometimes I need to merge List<A> and List<B> to List<C>, the object of A and B have a combine property such as id. Is there any function like below？

List<T> merge(List<F1> list1, List<F2> list2, Function<T, F1, F2> func);

[memimy2015]

@loki-1 Correctly! Your method can solve my request. I want to know if there is a method I can do this by 1 line code.

[loki-1]

If I understood the original request correctly, it’s not a ‘zip’ operation because elements should match based on their key, not on their positions. So if lists are not sorted, there should be additional operation to find the matching element by key, something like

Map<Long, Exam> examByStudentId = Maps.uniqueIndex(exams, e -> e.studentId);
List<ScoreRecord> records = Lists.transform(students, student -> {
    Exam exam = examByStudentId.get(student.studentId);
    return new ScoreRecord(student.name, exam.score);
});