anchor.diff:                      <a class="portfolio-box">
                           <img src="images/portfolio/thumbnails/2_.jpg" class="img-responsive" alt="">
                           <div class="portfolio-box-caption">
  -                            <div class="recycle-filter">
  -                                <img src="images/filters/recycle_filter.png" class="img-responsive">
  -                            </div>
  -                            <div class="compost-filter">
  -                                <img src="images/filters/compost_filter.png" class="img-responsive">
  -                            </div>
  -                            <div class="trash-filter">
  -                                <img src="images/filters/trash_filter.png" class="img-responsive">
  -                            </div>
  -                            <div class="special-filter">
  +                             <div class="filter-icon recycle-filter" data-filter-type="recycle">
  +                                <img src="images/filters/recycle_filter.png" class="img-responsive">
  +                            </div>
  +                            <div class="filter-icon compost-filter" data-filter-type="compost">
  +                                <img src="images/filters/compost_filter.png" class="img-responsive">
  +                            </div>
  +                            <div class="filter-icon trash-filter" data-filter-type="trash">
  +                                <img src="images/filters/trash_filter.png" class="img-responsive">
  +                            </div>
  +                            <div class="filter-icon special-filter" data-filter-type="special">
                                   <img src="images/filters/pickup_filter.png" class="img-responsive">
                               </div>
                               <div class="info-icon" id="info-icon-id-paper">
  
positive.code:                                 </div>
                                  <div class="project-name">
                                      <% @metals_examples.each do |metals_example| %>
                                          <%= metals_example.name %><%= "," unless metals_example == @metals_examples.last %>
                                      <% end %>
                                  </div>
                              </div>
  
negative.code:                     <a class="portfolio-box">
                          <img src="images/portfolio/thumbnails/7.jpg" class="img-responsive" alt="">
                          <div class="portfolio-box-caption">
                              <div class="filter-icon recycle-filter" data-filter-type="recycle">
                                  <img src="images/filters/recycle_filter.png" class="img-responsive">
                              </div>
                              <div class="filter-icon compost-filter" data-filter-type="compost">
                                  <img src="images/filters/compost_filter.png" class="img-responsive">
                              </div>
                              <div class="filter-icon trash-filter" data-filter-type="trash">
                                  <img src="images/filters/trash_filter.png" class="img-responsive">
                              </div>
                              <div class="filter-icon special-filter" data-filter-type="special">
                                  <img src="images/filters/pickup_filter.png" class="img-responsive">
                              </div>
                              <div class="info-icon" onclick="showItemBox();">
  