Newbie question - how to check for a varible

[Joe Lewis Wilkins]

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
>> can’t seem to find it’s 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 I’d rather have the  
>> assurance of
>> checking to see if a variable exist? Is this a non-issue in  
>> Revolution?
>>
>> Thanks
>>
>> -Stephen Cox