in_groups_of

# File actionpack/lib/action_view/helpers/prototype_helper.rb, line 1232
      def in_groups_of(variable, number, fill_with = nil)
        arguments = [number]
        arguments << fill_with unless fill_with.nil?
        add_variable_assignment!(variable)
        append_enumerable_function!("inGroupsOf(#{arguments_for_call arguments});")
      end