I found this interesting enough to experiment with. I wrote a blog entry on
it.

http://mkruger.cfwebtools.com/index.cfm/2005/8/15/dynamic%20eval

-Mark

-----Original Message-----
From: Mark A Kruger [mailto:[EMAIL PROTECTED]
Sent: Monday, August 15, 2005 12:57 PM
To: CF-Talk
Subject: RE: Not not() = function; not() = valid syntax?


The issue has to do with "dynamic evaluation" between the pound signs. In
CFMX you can do the following:

#1+2#

and it will output 3.  You can get more complex as well - including logic as
in

#not true#        (outputs no)
#not false#     (ouptputs yes)


This illustrates how NOT is not a function but an operand. The parenthesese
are incidental.

#not true#  is the same as #not (true)#  or #not(true)#   or the result of a
function call #not isdefined('foo')#.

In each case the result (if a scalar) is legal.  In CF 5 and earlier this
was not the case and would have required an "evaluation( )" encapsulation or
a SET statement that gave the server a straight path, as in:

 <cfset tmp = not true><br/>
 not true = #tmp#<br>
 <cfset tmp = not(true)>
 not(true) = #tmp#<br>

-Mark

Mark A. Kruger, CFG, MCSE
www.cfwebtools.com
www.necfug.com
http://mkruger.cfwebtools.com






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