import java.util.function.BiFunction;
import java.util.function.Function;

public class Currying {

    // A,B -> C
    // A -> B -> C

    public static BiFunction<Integer, Integer, Integer> add = (a, b) -> a + b;

    public static <A, B, C> Function<A, Function<B, C>> curry(BiFunction<A, B, C> fnToCurry) {
        return a -> b -> fnToCurry.apply(a, b);
    }

    public static void main(String[] args) {
        System.out.println("add:" + add.apply(2, 3));
        System.out.println("add:" + curry(add).apply(2).apply(3));
    }
}