anchor.diff:                            <%= default_image?(pro&.pictures&.first&.url_picture) %>
                             <h2><%= pro&.price %></h2>
                             <p><%= pro&.name %></p>
  -                          <a href="#" class="btn btn-default add-to-cart"><i class="fa fa-shopping-cart"></i>Detail</a>
                           </div>
                         </div>
                       </div>
  
positive.code:                           <%= image_tag("home/recommend2.jpg") %>
                            <h2>$56</h2>
                            <p>Easy Polo Black Edition</p>
                            <a href="#" class="btn btn-default add-to-cart"><i class="fa fa-shopping-cart"></i>Add to cart</a>
                          </div>
  
                        </div>
  
negative.code:             <div class="tab-content">
                <% @categories.each_with_index do |cat, index| %>
                  <div class="tab-pane fade <%= index == 0 ? 'active' : nil %> in" id="<%= cat.slug %>" >
                    <% cat&.products.each do |pro| %>
                    <div class="col-sm-3">
                      <div class="product-image-wrapper">
                        <div class="single-products">
  