NrofRows

unit-functions NrofRows

concept

• NrofRows() is a function resulting in the number of elements of a domain-unit.
• NrofRows is a property used to configure the number of elements of a domain unit

The first part of this page describes the NrofRows() function, the last paragraph describes the NrofRows property

syntax

• NrofRows(domainunit)
• #domainunit

definition

NrofRows(domainunit) or #domainunit results in a uint32 parameter with the number of entries/elements (cardinality) of the argument domainunit.

applies to

• domain unit domainunit with value-type of the group CanBeDomainUnit

example

1. parameter<uint32> rowsRegions := NrofRows(Region); // result = 5
2. parameter<uint32> rowsRegions := #RegionDomain;    // result = 5

domain Region, nr of rows = 5

see also

• range

property

NrofRows is a property configured for a domain unit, to inform the GeoDMS about the number of elements/entries of the domain. This number is also called the cardinality.

For domain units with data read from external storages or with an expression, the number of elements is read/calculated. So for these domain units this NrOfRows property does not have to be configured.

The range function can be used as alternative for the NrOfRows property and offers more functionality, for example to non zero based domain units).

configuration

The NrofRows property, due to historical reasons, has a little different syntax (no double quotes) as a normal property, see the example

unit<uint8> WeekDays: NrofRows = 7
{
   attribute<string> name : ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'];
}