[REBOL] Trapping errors? - Not like the book says? Re:(2)
From: rebol:techscribe at: 3-Aug-2000 10:59
Hi Eric,
>SEND doesn't return a value, so TRY doesn't return one either. As a
>result all the set-word error: sees is the unset! value, which produces
>the error.
Exactly.
>If you add 'true to the end of the try block, that
>ensures you'll have some value to set 'error to.
1. A better way to do it would be to use set/any 'error try [...] as in:
>> either error? set/any 'error try [print "hi"] [
print "error"
] [
print "no error"
]
hi
no error
>> either error? set/any 'error try [print 1 / 0] [
print "error"
] [
print "no error"
]
error
;- Elan [ : - ) ]
author of REBOL: THE OFFICIAL GUIDE
REBOL Press: The Official Source for REBOL Books
http://www.REBOLpress.com
visit me at http://www.TechScribe.com
