Errata for RubyCocoa

#33110: You should make your WindowController a subclass of NSWindowController and make your LogController and AppChoiceController subclasses of NSViewController. These are important classes to understand in Cocoa and important design patterns to follow in Cocoa development, so it'd be good to teach readers the right way to do this from the start.--Christopher M. Hanson

#35370: In this piece of code (and consequentially in the 'preferred-list' code sample) the 'template.name' has to be '@template.name', but even this won't save it from an exception.

def description
"<#{self.class}: #{@display_name}/#{@app_name} by #{template.name}" +
" favorite: #{@favorite}"
end

For some reason, the piece is called *before* the initialization (it seems during the TranslatorPreference.alloc call in Preferences.init) and the @template is still nil, so @template.name fails with an exception. My modifications to make it run are:

def description
template = @template.nil? ? nil : @template.name
"<#{self.class}: #{@display_name}/#{@app_name} by #{template}" +
" favorite: #{@favorite}"
end

It begs for some research and explanation though.--Aleksey Gureiev