_charDistance (MicroStream API)

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 _charDistance
```
Function type that calculates the distance or difference or cost between two given characters.
This is useful mostly for string procedure algorithms (e.g. Levenshtein distance).

- Method Summary
  
  Modifier and Type Method Description
  
  float distance(char a, char b)
  Calculates the distance of the two given characters.

- Method Detail
  - distance
```
float distance(char a,
               char b)
```
    Calculates the distance of the two given characters.
    The meaning of the returned value depends on the function implementation and/or the context it is used in.
    Typical string similarity values range from 0.0 to 1.0 .
    
    Parameters:
    
    a - the first character
    
    b - the second character
    
    Returns:
    
    the distance/difference/cost of the two given characters.