<cMessage>
The message name of the method to be defined.
Method DataObject():defineMethod() Foundation
Defines a dynamic method.
Syntax
:defineMethod( <cMessage>, <cFunction>|<bExpression>) --> self
Parameters
<cFunction>
The name of the function to be executed when the message <cMessage> is sent to the object. The function receives the DataObject as the first parameter.
<bExpression>
A code block to be executed when the message <cMessage> is sent to the object. The code block receives the DataObject as the first parameter.
Return
This method returns the DataObject (self).
Description
:defineMethod() allows to dynamically add new methods to or to re-define existing methods of a DataObject. Once defined, dynamic methods behave like ordinary methods implemented in a static class, and calls to these methods are not routed to :noMethod(). Dynamic methods using a function as the method implementation only have a small performance penalty compared to static methods. The function IsMethod() can be used to test for the existence of a method added via :defineMethod(). In addition, the method :classDescribe() also reflects dynamic methods.
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