app/views/characteristics/index.html.erb
<p id="notice"><%= notice %></p>
<h1>Listing Characteristics</h1>
<table>
<thead>
<tr>
<th>Name</th>
<th colspan="3"></th>
</tr>
</thead>
<tbody>
<% @characteristics.each do |characteristic| %>
<tr>
<td><%= characteristic.name %></td>
<td><%= link_to 'Show', characteristic %></td>
<td><%= link_to 'Edit', edit_characteristic_path(characteristic) %></td>
<td><%= link_to 'Destroy', characteristic, method: :delete, data: { confirm: 'Are you sure?' } %></td>
</tr>
<% end %>
</tbody>
</table>
<br>
<%= link_to 'New Characteristic', new_characteristic_path %>