35 lines
923 B
Java
35 lines
923 B
Java
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// functional/CurryingAndPartials.java
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// <20>2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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import java.util.function.*;
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public class CurryingAndPartials {
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// Uncurried:
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static String uncurried(String a, String b) {
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return a + b;
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}
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public static void main(String[] args) {
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// Curried function:
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Function<String, Function<String, String>> sum =
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a -> b -> a + b; // (1)
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System.out.println(uncurried("Hi ", "Ho"));
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Function<String, String>
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hi = sum.apply("Hi "); // (2)
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System.out.println(hi.apply("Ho"));
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// Partial application:
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Function<String, String> sumHi = sum.apply("Hup ");
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System.out.println(sumHi.apply("Ho"));
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System.out.println(sumHi.apply("Hey"));
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}
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}
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/* Output:
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Hi Ho
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Hi Ho
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Hup Ho
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Hup Hey
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*/
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