Using objGlobal to pass optional parameters
Extending the idea in the previous section slightly, you can introduce the concept of optional parameters being passed into scripts. In a script that needs to pass some optional parameters into another script you might find code like this:
objGlobal.OptParms = new Object();
objGlobal.OptParms.CustNumber = "12345";
objGlobal.OptParms.CustName = "ACME ENGINEERING";
NAVIGATE_TO_SCREEN("uShowCustomer");
and the script that receives the optional parameters you would find code possibly structured something like this:
var CustNumber = "some default value";
var CustName = "some default value";
if (objGlobal.OptParms != null)
{
CustNumber = objGlobal.OptParms.CustNumber;
CustName = objGlobal.OptParms.CustName;
objGlobal.OptParms = null;
}
/* Now we proceed to use the values in CustNumber and CustName */
The line objGlobal.OptParms = null; line is very important to this style of processing because it destroys the temporary OptParms object.