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

public final class Option_bind {
  public static void main(final String[] args) {
    final Option<Integer> o1 = some(7);
    final Option<Integer> o2 = some(8);
    final Option<Integer> o3 = none();
    final Option<Integer> p1 = o1.bind({int i => i % 2 == 0 ? some(i * 3) : Option.<Integer>none()});
    final Option<Integer> p2 = o2.bind({int i => i % 2 == 0 ? some(i * 3) : Option.<Integer>none()});
    final Option<Integer> p3 = o3.bind({int i => i % 2 == 0 ? some(i * 3) : Option.<Integer>none()});
    optionShow(intShow).println(p1); // None
    optionShow(intShow).println(p2); // Some(24)
    optionShow(intShow).println(p3); // None
  }
}