entitySelection.count( )

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4D v19.8


entitySelection.count ( attributePath ) -> Result

Parameter	Type	Description
attributePath	Text	Path of the attribute to be used for calculation
Result	Real	Number of non null attributePath values in the entity selection

The entitySelection.count( ) method returns the number of entities in the entity selection with a non-null value in attributePath.

Note: Only scalar values are taken into account. Object or collection type values are considered as null values.

An error is returned if:

We want to find out the total number of employees for a company without counting any whose job title has not been specified:

 C_OBJECT($sel)

 C_REAL($count)

 

 $sel:=ds.Employee.query("employer = :1";"Acme, Inc")

 $count:=$sel.count("jobtitle")