Description🔗
The fieldsExpression
class is an intermediate class for handling field
expression function objects (e.g. add
, subtract
etc.) whereinto more
than one fields are input.
The class is not an executable function object itself, yet a provider for common entries to its derived function objects.
Usage🔗
The optional-inherited entries provided by fieldsExpression
to the derived
function objects are as follows:
<userDefinedSubDictName1>
{
// Mandatory and other optional entries
...
// Optional (inherited) entries (runtime modifiable)
fields (<field1> <field2> ... <fieldN>);
result <fieldResult>;
}
where the entries mean:
Property | Description | Type | Required | Default |
---|---|---|---|---|
fields | Names of the operand fields | wordList | yes | - |
result | Names of the output fields | wordList | no | <FO>(<f1>,…) |
Further information🔗
Source code:
API:
History:
- Introduced in version v1612+