org.apache.commons.lang3.function

## Interface FailableDoubleFunction<R,E extends Throwable>

- Type Parameters:
    `R` - Return type.
    `E` - Thrown exception.
  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 and Description
    --- | ---
    `static FailableDoubleFunction` | `NOP` NOP singleton

  - ### Method Summary

    All Methods Static Methods Instance Methods Abstract Methods Default Methods
    Modifier and Type | Method and Description
    --- | ---
    `R` | `apply(double input)` Applies this function.
    `static <R,E extends Throwable> FailableDoubleFunction<R,E>` | `nop()` Returns The NOP singleton.

- - ### Field Detail

    - #### NOP

          static final FailableDoubleFunction NOP

      NOP singleton

  - ### Method Detail

    - #### nop

          static <R,E extends Throwable> FailableDoubleFunction<R,E> nop()

      Returns The NOP singleton.
      Type Parameters:
        `R` - Return type.
        `E` - Thrown exception.
      Returns:
        The NOP singleton.

    - #### apply

          R apply(double input)
           throws E extends Throwable

      Applies this function.
      Parameters:
        `input` - the input for the function
      Returns:
        the result of the function
      Throws:
        `E` - Thrown when the function fails.
        `E extends Throwable`

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