update (KirbyBase::KBTable)

    # File lib/kirbybase.rb, line 2201
        def update(*updates, &select_cond)
            raise ArgumentError, "Must specify select condition code " + \
             "block.  To update all records, use #update_all instead." if \
             select_cond.nil?

            # Update the header variables.

            update_header_vars

            # Get all records that match the selection criteria and

            # return them in an array.

            result_set = get_matches(:update, @field_names, select_cond)

            # If updates is empty, this means that the user must have specified

            # the updates in KBResultSet#set, i.e.

            # tbl.update {|r| r.recno == 1}.set(:name => 'Bob')

            return result_set if updates.empty?

            # Call KBTable#set and pass it the records to be updated and the

            # updated criteria.

            set(result_set, updates)
        end