link_to_unless (ActionView::Helpers::UrlHelper)

    # File lib/action_view/helpers/url_helper.rb, line 378
          def link_to_unless(condition, name, options = {}, html_options = {}, &block)
            if condition
              if block_given?
                block.arity <= 1 ? yield(name) : yield(name, options, html_options)
              else
                name
              end
            else
              link_to(name, options, html_options)
            end
          end