Rails - Aug 2006 - include/helper use application.rb clarification

Hi,

Can I ask a quick clarificaiton re use of "application.rb" to
propagate
items through ones application.  Refer to embedded code from 
"application.rb" as reference.

Is it the case that by including methods etc into "application.rb"
this
is a means of then making it available to all other applicaiton 
controllers, views, helpers?  Is this the case?

Does this occur for both (a) include (b) helper and (c) 
require_dependency usage in application.rb?

Just trying to make sure I understand how rails works here


-----------------
require_dependency 
"#{RAILS_ROOT}/vendor/plugins/active_rbac/app/helpers/rbac_helper"
require_dependency 
"#{RAILS_ROOT}/vendor/plugins/active_rbac/lib/active_rbac/application_controller_mixin"

class ApplicationController < ActionController::Base
    helper RbacHelper
    # The application controller will give us the "current_user"
method.
    include ActiveRbacMixins::ApplicationControllerMixin
end
-----------------

-- 
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