parseNumericFieldGroup parses a single number or number range. E.g. '5' or '5-8'.
(Private function.)
parseNumericFieldGroup returns a range that iterates over all the values in the
field-group. It has options supporting conversion of field numbers to zero-based
indices and the use of '0' (zero) as a field number.
This was part of the original code supporting numeric field list and is used by
both numeric and named field-list routines.
parseNumericFieldGroup parses a single number or number range. E.g. '5' or '5-8'. (Private function.)
parseNumericFieldGroup returns a range that iterates over all the values in the field-group. It has options supporting conversion of field numbers to zero-based indices and the use of '0' (zero) as a field number.
This was part of the original code supporting numeric field list and is used by both numeric and named field-list routines.