Newbie question - how to check for a varible

[Stephen Cox]

Ahhh! "Exists" was there. I was looking at it from the wrong end. Thanks.

God I feel like I have to unlearn all my coding habits and thinking.


On 5/8/09 2:47 AM, "Joe Lewis Wilkins" <pepetoo at cox.net> wrote:

> Stephen, I should have checked. Check "exists" in the dictionary for
> the rev syntax. Not quite as straightforward or easy as with HC.
> Sorry,
> Joe Wilkins
> 
> On May 7, 2009, at 11:35 PM, Joe Lewis Wilkins wrote:
> 
>> Stephen,
>> 
>> Without even checking, since it's the way it would be done in HC,
>> just use:
>> 
>> if tUsername is empty then ....
>> 
>> if tUsername exists then ...
>> 
>> You were already there. Didn't you check these out in the messagebox?
>> 
>> Joe Wilkins
>> 
>> On May 7, 2009, at 11:25 PM, Stephen Cox wrote:
>> 
>>> Really two questions:
>>> 
>>> How do I check if a variable is empty? Sort of like;
>>> 
>>> If !empty(tUsername)
>>>   // process here
>>> Endif
>>> 
>>> Empty() is a Foxpro function that pops if what you are checking is
>>> empty. I
>>> can¹t seem to find it¹s equivalent in revolution. Am I approaching
>>> this the
>>> wrong way? And can I check fields the same way?
>>> 
>>> I suppose I could create an empty variable and just compare the 2?
>>> But is
>>> there an easier way?
>>> 
>>> Next question; checking the existence of a variable? Now I know I
>>> can turn
>>> on Strict Compilation (and I have) but I¹d rather have the
>>> assurance of
>>> checking to see if a variable exist? Is this a non-issue in
>>> Revolution?
>>> 
>>> Thanks
>>> 
>>> -Stephen Cox
> 
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