anchor.diff:  <div class="part2">
             <% item = @blog_items[2]; %>
             <p>
  -          <% if item['thumbnail']  %>
  +          <% if item && item['thumbnail']  %>
   
               <img <%= item['thumbnail'].to_s.html_safe %> style="border:1px solid #B2DCDE; border-top-left-radius: 5px; border-top-right-radius: 5px; border-bottom-left-radius: 5px;  border-bottom-right-radius: 5px;" width="250" height="150"/>
             <% else %>
  
positive.code: <div class="part2">
            <% item = @blog_items[3]; %>
            <p>
            <% if item['thumbnail']  %>
  
              <img <%= item['thumbnail'].to_s.html_safe %> style="border:1px solid #B2DCDE; border-top-left-radius: 5px; border-top-right-radius: 5px; border-bottom-left-radius: 5px;  border-bottom-right-radius: 5px;" width="250" height="150"/>
            <% else %>
  
negative.code:         <div class="part1">
            <% item = @blog_items[1]; %>
            <p>
            <% if item && item['thumbnail']  %>
  
              <img <%= item['thumbnail'].to_s.html_safe %> style="border:1px solid #B2DCDE; border-top-left-radius: 5px; border-top-right-radius: 5px; border-bottom-left-radius: 5px;  border-bottom-right-radius: 5px;" width="250" height="150"/>
            <% else %>
  