def delete( key )
        v = super( key )
        if String === v
            v = YAML.load( v )
        end
        v
    end
def delete( key )
        v = super( key )
        if String === v
            v = YAML.load( v )
        end
        v
    end
:call-seq:
   ydbm.delete(key)

 Deletes value from database associated with +key+.

 Returns value or +nil+.