module ActiveSupport #:nodoc
  module CoreExtensions #:nodoc
    module Array #:nodoc
      module ExtractOptions #:nodoc:all    
        # Extracts options from a set of arguments. Removes and returns the last
        # element in the array if it's a hash, otherwise returns a blank hash.
        #
        #   def options(*args)
        #     args.extract_options!
        #   end
        #
        #   options(1, 2)           # => {}
        #   options(1, 2, :a => :b) # => {:a=>:b}
        #:nodoc
        def extract_options!
          last.is_a?(::Hash) ? pop : {}
        end
      end
    end
  end
end