John J Barton:

> The HTML tab you see in the Firebug tab set is just a picture, there is no
> real HTML panel.
>
> All of Firebug's panels are actually <div> elements allocated on demand. So
> the code above is saying:
>
>    If the user has ever used the HTML panel in debugging this web page, then
> get the inspector vars.

In that case shouldn't be call `getInspectorVars` when the HTML has
been showed? It is really questionable how this design is the best
approach.

> Wait! If the language can fix my mistakes then I'm definitely all for it!

The existential operator reminds me for PHP `@` operator. Over two
weeks ago I have to deal with PHP application, which should be moved
on another server. When I moved the application to the new server I
got simply white screen as output of my browser. I was walking trough
the included files and I found in `db.php` a line:

@mysql_pconnect();

It was coded if mysql_pconnect does not return value which can be
converted to true to die the script.

The time for debugging that was over 1 hour and the problem was that I
haven't got installed mysql library. I really don't want to debugging
such a code.

Personally if I have to use the existential operator I will start
thinking about better design for my application.

Regards.
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