FailableDoubleFunction (Apache Commons Lang 3.20.0 API)
Description: declaration: package: org.apache.commons.lang3.function, interface: FailableDoubleFunction

# Interface FailableDoubleFunction<R, E extends Throwable>

Type Parameters:
  `R` - Return type.
  `E` - The kind of thrown exception or error.

Functional Interface:
  This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface public interface FailableDoubleFunction<R, E extends Throwable>
A functional interface like `DoubleFunction` that declares a `Throwable`.

Since:
  3.11

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `static final FailableDoubleFunction`
  `NOP`
  NOP singleton

- ## Method Summary

  Modifier and Type
  Method
  Description
  `R`
  `apply(double input)`
  Applies this function.
  `static <R, E extends Throwable>
  FailableDoubleFunction<R,E>`
  `nop()`
  Gets the NOP singleton.

- ## Field Details

  - ### NOP

    static final FailableDoubleFunction NOP
    NOP singleton

- ## Method Details

  - ### nop

    static <R, E extends Throwable> FailableDoubleFunction<R,E> nop()
    Gets the NOP singleton.
    Type Parameters:
      `R` - Return type.
      `E` - The kind of thrown exception or error.
    Returns:
      The NOP singleton.

  - ### apply

    R apply(double input) throws E
    Applies this function.
    Parameters:
      `input` - the input for the function
    Returns:
      the result of the function
    Throws:
      `E` - Thrown when the function fails.