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.
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>,...) |
Source code:
History