ScalarFunction (vespajlib 7.538.1 API)

All Superinterfaces:

Function<EvaluationContext<NAMETYPE>,Double>
```
public interface ScalarFunction<NAMETYPE extends Name>
extends Function<EvaluationContext<NAMETYPE>,Double>
```
A function which returns a scalar

Author:

bratseth

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`Double`	`apply(EvaluationContext<NAMETYPE> context)`
`default Optional<TensorFunction<NAMETYPE>>`	`asTensorFunction()`	Returns this as a tensor function, or empty if it cannot be represented as a tensor function
`default String`	`toString(ToStringContext context)`

Methods inherited from interface java.util.function.Function
andThen, compose

- Method Detail
  - apply
```
Double apply(EvaluationContext<NAMETYPE> context)
```
    Specified by:
    
    apply in interface Function<EvaluationContext<NAMETYPE extends Name>,Double>
  - asTensorFunction
```
default Optional<TensorFunction<NAMETYPE>> asTensorFunction()
```
    Returns this as a tensor function, or empty if it cannot be represented as a tensor function
  - toString
```
default String toString(ToStringContext context)
```