rendering a collection to a partial, but I want to have the layout be different for even and odd records that are rendered out. https://gist.github.com/blairanderson/7075515

_thing.html.erb

<% if thing_counter.even? %>
  <div class="wide">
    <h2>Header</h2>
    <p class="lead"></p>
  </div>
  <div class="narrow">
    <%= image_tag thing.image %>
  </div>
<% else %>
  <div class="narrow">
    <%= image_tag thing.image %>
  </div>
  <div class="wide">
    <h2>Header</h2>
    <p class="lead"></p>
  </div>
<% end %>

index.html.erb

<%= render partial: 'thing', collection: @some_pictures_or_things %>