CFML Language Reference
Chapter 2 :  ColdFusion Functions

StructIsEmpty

Indicates whether the specified structure contains data. Returns TRUE if structure is empty and FALSE if it contains data.

See also StructClear, StructDelete, StructFind, StructInsert, StructKeyArray, StructCount, StructKeyArray, and StructUpdate.

Syntax

StructIsEmpty(structure)

structure

Structure to be tested.

Usage

This function throws an exception if structure does not exist.

Example

<!--- This example illustrates usage of StructIsEmpty. --->
<P>This file is identical to addemployee.cfm, which is called
by StructNew, StructClear, and StructDelete. It is an 
example of a custom tag used to add employees. Employee 
information is passed through the employee structure (the 
EMPINFO attribute). In UNIX, you must also add the Emp_ID.

<CFSWITCH EXPRESSION="#ThisTag.ExecutionMode#">
   <CFCASE VALUE="start">
      <CFIF StructIsEmpty(attributes.EMPINFO)>
        <CFOUTPUT>Error. No employee data was passed.</CFOUTPUT>
          <CFEXIT METHOD="ExitTag">
      <CFELSE>
        <!--- Add the employee --->
        <!--- In UNIX, you must also add the Emp_ID --->
         <CFQUERY NAME="AddEmployee" DATASOURCE="cfsnippets">
          INSERT INTO Employees
              (FirstName, LastName, Email, Phone, Department)
            VALUES 
              <CFOUTPUT>
                (
                  `#StructFind(attributes.EMPINFO, "firstname")#' ,
                  `#StructFind(attributes.EMPINFO, "lastname")#' ,
                  `#StructFind(attributes.EMPINFO, "email")#' ,
                  `#StructFind(attributes.EMPINFO, "phone")#' ,
                  `#StructFind(attributes.EMPINFO, "department")#'
                 )
              </CFOUTPUT> 
        </CFQUERY>
      </CFIF>
      <CFOUTPUT><hr>Employee Add Complete</CFOUTPUT>
   </CFCASE>
</CFSWITCH> 

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