Ruby on rails Haml/Ruby/Rails是否有条件地添加元素？

我有以下代码：

- userlist.each do |member|
  = render :partial => 'projects/member_small', :locals => { :user => member }

我希望每隔两次do | member |出现时添加一个div元素。所以基本上每两次。我想要这个：

- userlist.each do |member|
  .row
    = render :partial => 'projects/member_small', :locals => { :user => member }

---

您可以将列表分为两组：

- userlist.each_slice(2) do |group|
  .row
    - group.each do |member|
      = render :partial => 'projects/member_small', :locals => { :user => member }