return</span> <span class="s">"Hello, "</span> + person.firstname + <span class="s">" "</span> + person.lastname;
}

<span class="k">var</span> user = { firstname: <span class="s">"Jane"</span>, lastname: <span class="s">"User"</span> };

document.body.innerHTML = greeter(user);</pre>

<p>If you need more details please see the <a href="apidocs/fake-typescript.html">API docs for the TypeScript</a> task.</p>

          <div class="tip" id="fs1">namespace System</div>
          
        </div>
        <div cl