From: Doug Jolley <lists@...>
Date: 2012-08-02T01:01:51+09:00
Subject: Re: How to test whether a session variable has a particular key

> Anyway, if you can avoid storing nil values, then I'd just use
>
>   if session[:key]
>     ... do something
>   end

Interestingly, it seems that I am UNABLE to assign a nil value to a 
session element.  That's disappointing because it would have been handy 
to treat elements with a nil value as non-existent since there is no way 
to remove an element from the pseudo hash.

Note: The above is within the context of CGI::Session.

      ... doug

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