Mark for removal entries that were kept, and delete unkept ones.

This method is called automatically by filters, so you generally don’t need to care about it.

Source Code

# File action_controller/flash.rb, line 109
def sweep #:nodoc:
  keys.each do |k| 
    unless @used[k]
      use(k)
    else
      delete(k)
      @used.delete(k)
    end
  end

  # clean up after keys that could have been left over by calling reject! or shift on the flash
  (@used.keys - keys).each{ |k| @used.delete(k) }
end