Added in API level 24
    DoubleFunction
@FunctionalInterface interface DoubleFunction<R : Any!>
| java.util.function.DoubleFunction | 
Represents a function that accepts a double-valued argument and produces a result. This is the double-consuming primitive specialization for Function. 
This is a functional interface whose functional method is apply(double).
Summary
| Public methods | |
|---|---|
| abstract R | Applies this function to the given argument. | 
Public methods
apply
Added in API level 24
      abstract fun apply(value: Double): R
Applies this function to the given argument.
| Parameters | |
|---|---|
| value | Double: the function argument | 
| Return | |
|---|---|
| R | the function result | 
