R - the type of the result of the function@FunctionalInterface public interface DoubleFunction<R>
double-consuming primitive specialization for
 Function.
 This is a functional interface
 whose functional method is apply(double).
Function| Modifier and Type | Method and Description | 
|---|---|
| R | apply(double value)Applies this function to the given argument. | 
R apply(double value)
value - the function argument Submit a bug or feature 
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