<div>
my little workaround to that problem is to check if the variable exists and to check it a value for it exists<br />
<br />
<br />
&lt;CFIF IsDefined( &quot;Application.TempVar&quot; )&gt; AND Application.TempVar NEQ &quot;&quot;&gt;<br />
<br />
<br />
<br />
or something to that affect
</div>


my little workaround to that problem is to check if the variable exists and to check it a value for it exists


<CFIF IsDefined( "Application.TempVar" )> AND Application.TempVar NEQ "">



or something to that affect

<div>
mosphat, GOOD ANSWER, now do me one better...<br />
<br />
You will get the points, now for the bonus round...<br />
<br />
That will work find for Application and Session vars, but what about just plan-old local vars? &nbsp;How would you go about destroying them?<br />
<br />
Thanks.
</div>


mosphat, GOOD ANSWER, now do me one better...

You will get the points, now for the bonus round...

That will work find for Application and Session vars, but what about just plan-old local vars?  How would you go about destroying them?

Thanks.

<div>
Like I said: even if you don't define a scope, it ends up in the variables scope.<br />
<br />
This variable is actually set in the variables scope:<br />
&lt;cfset plain_old_local_var = &quot;test&quot;&gt;<br />
<br />
So you can delete it like this:<br />
&lt;cfset structDelete(variables, &quot;plain_old_local_var&quot;)&gt;<br />

</div>


Like I said: even if you don't define a scope, it ends up in the variables scope.

This variable is actually set in the variables scope:
<cfset plain_old_local_var = "test">

So you can delete it like this:
<cfset structDelete(variables, "plain_old_local_var")>


<div>
<div class="content wysiwyg-content">
How can I completely remove/annihilate/undefine<wbr /> a defined variable that would cause it to then fail an 'IsDefined()' test?<br />
<br />
Example:<br />
<br />
&lt;cfset Application.TempVar = &quot;test&quot;&gt;<br />
<br />
&lt;!--- do what? to cause this if test to fail? ---&gt;<br />
<br />
&lt;cfif IsDefined( &quot;Application.TempVar&quot; )&gt;<br />
&nbsp; &nbsp;&lt;cfoutput&gt;OK&lt;/cfoutput&gt;<br />
&lt;cfelse&gt;<br />
&nbsp; &nbsp;&lt;!--- want to wind up HERE ---&gt;<br />
&nbsp; &nbsp;&lt;cfoutput&gt;but I thought it existed!&lt;/cfoutput&gt;<br />
&lt;/cfif&gt;<br />
<br />
Remember, CF5! Thanks!
</div>
</div>


How can I completely remove/annihilate/undefine a defined variable that would cause it to then fail an 'IsDefined()' test?

Example:

<cfset Application.TempVar = "test">



<cfif IsDefined( "Application.TempVar" )>
   <cfoutput>OK</cfoutput>
<cfelse>
   
   <cfoutput>but I thought it existed!</cfoutput>
</cfif>

Remember, CF5! Thanks!

How do I undefine a variable in CF 5.0?

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