home.erb

<h2>Notes Categories</h2>

<% unless @categories.nil? %>
<ul>
    <% @categories.each do |category| %>
        <li><a href="/notes/<%= category.id %>"><%= category.name %></a></li>
    <% end %>
</ul>
<% else %>
    <p>No notes categories at the moment :-(</p>
<% end %>