// functional/CurryingAndPartials.java

// (c)2021 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

import java.util.function.*;

public class CurryingAndPartials {

// Uncurried:

static String uncurried(String a, String b) {

return a + b;

}

public static void main(String[] args) {

// Curried function:

Function<String, Function<String, String>> sum =

a -> b -> a + b; // [1]

System.out.println(uncurried("Hi ", "Ho"));

Function<String, String>

hi = sum.apply("Hi "); // [2]

System.out.println(hi.apply("Ho"));

// Partial application:

Function<String, String> sumHi =

sum.apply("Hup ");

System.out.println(sumHi.apply("Ho"));

System.out.println(sumHi.apply("Hey"));

}

}

/* Output:

Hi Ho

Hi Ho

Hup Ho

Hup Hey

*/