Removing Spaces

[Chris Sharman]

brian_matthewsbrian matthews wrote:
> after off list conversations, I now suspect that my remark 'defines are 
> evaluated only when referenced' may be a fusion of related half-truths 
> and not strictly accurate in this case.

I thought you were right first time - although qtp and quiz are slightly 
different, I believe. I think quiz executes defines once per record 
complex (whether the records are selected or not - this can cause some 
unlooked-for effects and data conversion errors), and qtp does them each 
time they're referenced - potentially many times per record complex, so 
temp & item are preferable if you use them more than once.

> Having said that, the part about adding syntax ' if record ... exists' 
> is true, and WILL solve the problem.
> 
> I looked into this further and found that only the defines which do not 
> reference a record item need this syntax to be added i.e. in this case, 
> one of the setsytemval defines and the getsystemval; I believe this is 
> because PH assumes that they are constants and need not be evaluated 
> again. Once the defines are tied to a record item quiz will reavaluate 
> for each record.
> 
> One other thing, I also believe that defines which are thought to be 
> constants, are evaluated before any retrieval takes place - when they do 
> not reference a record item.

Never heard that before, although it seems fairly sensible most of the 
time, but could be subverted by systemvalues.
Would Bob/Alison like to shed some authoritative light here ?

Chris


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