Currying: Difference between revisions
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public class Curry { |
public class Curry { |
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//Curry a method |
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public static <T, U, R> Function<T, Function<U, R>> curry(BiFunction<T, U, R> biFunction) { |
public static <T, U, R> Function<T, Function<U, R>> curry(BiFunction<T, U, R> biFunction) { |
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return t -> u -> biFunction.apply(t, u); |
return t -> u -> biFunction.apply(t, u); |
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} |
} |
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public static void |
public static void curryMethod() { |
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BiFunction<Integer, Integer, Integer> bif = Curry::add; |
BiFunction<Integer, Integer, Integer> bif = Curry::add; |
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Function<Integer, Function<Integer, Integer>> |
Function<Integer, Function<Integer, Integer>> add = curry(bif); |
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Function<Integer, Integer> add5 = |
Function<Integer, Integer> add5 = add.apply(5); |
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System.out.println(add5.apply(2)); |
System.out.println(add5.apply(2)); |
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} |
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//Or declare the curried function in one line |
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public static void curryDirectly() { |
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Function<Integer, Function<Integer, Integer>> add = x -> y -> x + y; |
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Function<Integer, Integer> add5 = add.apply(5); |
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System.out.println(add5.apply(2)); |
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} |
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//prints 7 and 7 |
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public static void main(String[] args) { |
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curryMethod(); |
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curryDirectly(); |
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} |
} |
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} |
} |
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