Recently I have been porting an app into Rails 3 and probably you have
also been poking this new Rails 3 with ruby 1.9.2.
Therefore I would like to discuss a bit more about Rails 3 itself.
Particularly, things under railties lib directory covering classes
such as Railtie, Engine, Application and will go through
initialization with initializers.
Along the way I'll show some examples how you can use this knowledge
in your own gem or plugin.
Nothing too fancy but should be useful for developing your next Rails