import fj.data.Option;
import static fj.data.Option.none;
import static fj.data.Option.some;
import static fj.function.Integers.add;
import static fj.Show.intShow;
import static fj.Show.optionShow;

public final class Option_map {
  public static void main(final String[] args) {
    final Option<Integer> o1 = some(7);
    final Option<Integer> o2 = none();
    final Option<Integer> p1 = o1.map(add.f(42));
    final Option<Integer> p2 = o2.map(add.f(42));
    optionShow(intShow).println(p1); // Some(49)
    optionShow(intShow).println(p2); // None
  }
}