Does a Control Exist?

[Richmond]

On 24.11.2013 18:31, Ray wrote:
> After loosely following the item delimiter thread last week a similar 
> idea came to me today which might be an interesting discussion.
>
> It's often time consuming to type spell out...
>    if there is a field "My Field" then put field "My Field" into myVar
>
> If I don't first check to see if the control exists [and it doesn't] I 
> get an error and the script stops execution.
>
> I don't have to do this with a custom property.  That is if the script 
> is...
>    put the NewProperty of this card into myVar
> and said property doesn't exist, I simply end up with nothing in 
> myVar, but it doesn't cause an error and the script continues.
>
> Does anybody think it would be worth it to have a way to stop errors 
> from being produced when referring to non-existent controls?
>
> Ray Horsley
> LinkIt! Software
>

Well, surely the trick is to do something like this:

if exists(fld "My Field") then
     put fld "My Field" into myVar
end if

Easy-Peasy-Lemon-Squeezy!

Richmond.