Steven Taylor-3 wrote:
>
> Hi,
>
> say I've got a verb train, that I like as a verb train... and I don't want
> to break it up. Is there a way to check for an error condition?
>
> 3 (]{~ [ I.~]) i. 4
> 3
>
> 4 (]{~ [ I.~]) i. 4
> |index error
> | 4 (]{~[I.~])i.4
> |[-0]
>
>
You can use Adverse (::) conjunction:
verb=:]{~ [ I.~]
err=:'verb oops!'"_
3 verb i.4
3
3 verb :: err i.4
3
3 verb i.3
|index error: verb
| 3 verb i.3
3 verb :: err i.3
verb oops!
> I could set an initial value like this...
>
> fail=.0 [ret=. 4 { i.4 [ fail=.1
>
> i.e. fail should equal zero if ret=.4 runs correctly.
>
> I was looking at these foreigns briefly.
> errno=:13!:11
> errmsg=:13!:12
> errno''
> errmsg''
>
> these foreigns appear to be geared towards debug sessions though.
>
> thanks,
> -Steven
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
>
--
View this message in context:
http://old.nabble.com/error-handling-for-long-verb-trains-tp32425450s24193p32425938.html
Sent from the J Programming mailing list archive at Nabble.com.
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
