A lot of people get DE() wrong.
IIF does not short-circuit
(http://en.wikipedia.org/wiki/Short-circuit_evaluation), meaning that
your DE() gets evaluated even if the condition is FALSE. So, this will
break:
#iif(false, notFalse, false)#
since notFalse does not exist. Same here:
#iif(true, true, fols)#
since fols does not exist. And finally your code:
#iif(false, DE(x.classAssign["#y#head"]), DE(''))#
breaks since x.classAssign["NAMEhead"] does not exist.
DE evaluates a STRING parameter and finds double-quotes. If you pass in
a variable, it looks for the value of that variable. Since you are
passing x.classAssign["#y#head"], it looks for x.classAssign["NAMEhead"]
and breaks.
This will work: evaluate(DE("x.classAssign['#y#head']")) - notice the
single-quotes surrounding #y#head! This is because we don't want DE to
escape this, so we don't want to wrap it around double-quotes!
Here is the code (I used "no value" instead of "", but it's still the
same code that you use):
<cfset x.classAssign = {
NameHead = "this head",
NoNameHead = "that head"
} />
<cfoutput>
<cfset y = "Name" />
#iif(StructKeyExists(x.classAssign,"#y#head"),
evaluate(DE("x.classAssign['#y#head']")), DE("no value"))#<hr />
<cfset y = "NoExist" />
#iif(StructKeyExists(x.classAssign,"#y#head"),
evaluate(DE("x.classAssign['#y#head']")), DE("no value"))#<hr />
<cfset Y = 'Any' />
See how these two differ: <br />
#DE("x.classAssign['#y#head']")#<br />
#DE('x.classAssign["#y#head"]')#
</cfoutput>
Michael Grant wrote:
> HA! So I'm not the only one!
> So I thought DE meant "Delay Evaluation" as in "Don't evaluate what's in
> these little brackets this until you've satisfied the IIF condition."
>
>
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