java 8: func <$> arg1 <*> arg2 <*> arg3

.java

package com.michaelavila;

import java.util.Optional;
import java.util.function.Function;

/**
 * Created by michaelavila on 7/30/15.
 */
public class FunctionalExamples {
    public static void main(String[] args) {
        Function<String, Function<String, Function<String, String>>> greet = p1 -> p2 -> p3 -> {
            return "Hello, " + p1 + " " + p2 + " " + p3;
        };

        Optional<String> part1 = Optional.of("Shit");
        Optional<String> part2 = Optional.of("Head");
        Optional<String> part3 = Optional.of("Jerk");

        Optional<String> greeting1 = part1.map(greet).flatMap(part2::map).flatMap(part3::map);
        System.out.println(greeting1); // Optional[Hello, Shit Head Jerk]

        part2 = Optional.empty();

        Optional<String> greeting2 = part1.map(greet).flatMap(part2::map).flatMap(part3::map);
        System.out.println(greeting2); // Optional.empty
    }
}