Need an example of how to use "try" and "catch"

[Pete]

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 <bobs at 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
> >>>
> >>
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-- 
Pete
Molly's Revenge <http://www.mollysrevenge.com>