I did search for "empty" in the Online Dictionary. But all I got were property keywords. I also read the docs on put and answer and saw nothing about empty.
Anyway know now, thanks. As for checking for existence of variables.. Just a habit I formed over years writing dbase and c. "Always check the existence of a variable before you take any action on it". The compilers of today are more sophisticated so I'll probably wean my way off it. On 5/8/09 2:40 AM, "Mark Schonewille" <[email protected]> wrote: > Hi Stephen, > > > Search the docs for "empty". It will show you things like > > put empty into x > set the cProp to empty > > So, you will also want to read up on "put" and "set". > > There is also a function "variableNames", which will probably be very > useful to you. Why do you want to check for the existence of a > variable? I do this very, very rarely and only in really advanced > projects. > > > -- > Best regards, > > Mark Schonewille > > Economy-x-Talk Consulting and Software Engineering > http://economy-x-talk.com > http://www.salery.biz > Dutch forum: http://runrev.info/rrforum > > New: Snapper Screen Recorder 2.0.1 > Download at http://snapper.economy-x-talk.com > > On 8 mei 2009, at 08:25, 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 > > _______________________________________________ > use-revolution mailing list > [email protected] > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-revolution _______________________________________________ use-revolution mailing list [email protected] Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
