Interesting, never thought of that. Is there an advantage to doing that over just issuing the database call and checking for an error right after?
I've mostly thought of try/catch for as a debugging tool. I also use it any place where I put together a command in a variable and execute the command with a do statement. Pete On Thu, Mar 22, 2012 at 11:30 AM, Bob Sneidar <b...@twft.com> wrote: > I use it to determine if there has been an error executing a sequel query > for example. All my database calls go inside a try catch statement. If you > put it into a repeat loop, you can test to see if perhaps you have been > disconnected, or if a runtime error occurred due to a bad query, and then > act accordingly, either try to reconnect if disconnected, or bail out > gracefully if a runtime error has occurred. > > Bob > > > On Mar 22, 2012, at 10:33 AM, Michael Doub wrote: > > > Does anyone have any guidelines as to when you should use the try and > catch structure? I don't really know when or when not to use it. > > > > -= Mike > > > > > > > > On Mar 22, 2012, at 1:21 PM, Jim Hurley wrote: > > > >> Thanks Peter. > >> > >> The problem now is what do these bloody error numbers translate into. > >> Is the a list somewhere? > >> > >> When I try: > >> > >> on mouseUP > >> try > >> put the cantdelete of me into temp > >> catch tErr > >> --- if tErr is ?????? > >> end try > >> end mouseUP > >> > >> I get an error of 348,0,0 > >> > >> Jim > >> > >> > >> > >> > >>> Peter Brigham wrote: > >>> > >>> The syntax for the try construction is > >>> > >>> try > >>> <command here> > >>> catch tError > >>> <other commands here> > >>> end try > >>> > >>> and the error number is put into the variable tError. So the <other > commands> could be, eg, > >>> > >>> if tError = 314 then > >>> answer "range error in loading array" > >>> else if ... > >>> etc. > >>> end if > >>> > >>> -- Peter > >>> > >>> Peter M. Brigham > >>> > >>> pmbrig at gmail.com > >>> http://home.comcast.net/~pmbrig > >>> > >> > >> _______________________________________________ > >> use-livecode mailing list > >> use-livecode@lists.runrev.com > >> Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > >> http://lists.runrev.com/mailman/listinfo/use-livecode > > > > > > _______________________________________________ > > use-livecode mailing list > > use-livecode@lists.runrev.com > > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > > http://lists.runrev.com/mailman/listinfo/use-livecode > > > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode > > -- Pete Molly's Revenge <http://www.mollysrevenge.com> _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
