Should I initiate a Session with Session.set('key', undefined)?
<p>I new to Meteor and I've found myself initiating a Session with:</p>

<pre><code>Session.set('key', undefined);
</code></pre>

<p>Then somewhere inside a helper, say, I'd set it:</p>

<pre><code>...
Session.set('key, some value);
...
</code></pre>

<p>I'm not sure why I've started doing this; I may have seen it done somewhere and have just copied it. Can I just set the Session when I need it to hold the unique value and forget the initial 'undefined' value? </p>