[Rubycocoa-talk] problems implementing undo in raiseman sample application

[Steven A. <st...@ar...>]

Hello, I am working through the book Cocoa Programming for Mac OS X by  
Aaron Hillegass using RubyCocoa rather than Objective-C, and I am at  
the section where we are attempting to implement undo for the add new  
employee and delete new employee buttons.

My controller object as an @employees array as a member value.  Given  
this name, I have implemented, in my controller, the functions:

     insertObject_inEmployeesAtIndex(p, idx), and
     removeObjctFromEmployeesAtIndex(idx)

According to the book, "[...] these methods will be called  
automatically when the NSArrayController wishes ro insert or remove  
messages."  However, my functions do not seem to be getting called.  I  
have put NSLog statements to see whether they are being called, but  
right now it appears not.

My project is packaged below.  If you have any idea what I might be  
doing wrong, please let me know!

eteven