views/index.erb
<form action="/" method="get">
<input name="session" class="session-name" type="text" autofocus="autofocus" placeholder="Enter a session name..."/>
</form>
<br />
<% if sessions.any? %>
<h2>Or pick an existing session</h2>
<ul>
<% sessions.each do |key, session| %>
<li>
<a href="/?session=<%= key %>" alt="<%= session.name %>">
<%= session.name %>
</a>
<form class="destroy" method="post" action="/<%= key %>">
<input type="hidden" name="_method" value="delete"/>
<button class="destroy" type="submit">×</button>
</form>
</li>
<% end %>
</ul>
<% end %>