[REBOL] Re: Undocumented: Index value local to FOR loop
From: nitsch-lists:netcologne at: 24-Mar-2004 1:42
Hi Giuseppe,
On Dienstag, 23. M=E4rz 2004 15:50, Giuseppe Chillemi wrote:
> I have found this undocumentend behaviour:
> Try this script:
rebol []
esterno: does [
print [indice]
]
for indice 1 10 1 [
esterno
]
Halt
> Rebol tell me that "indice" is not initalized but it is ! This word seems
> to remain local to the for loop.
I quickly step in, even if Greg described the technical:
some loops make locals for you implicitely.
so
for indice 1 10 1 [ esterno ]
is the same as
use[indice][
for indice 1 10 1 [ esterno ]
]
so the global is not changed.
and your 'esterno uses the global.
thats handy because i usually use the same varname for loopvars, like 'i, and
have not to declare it as local.
further note: its not consistent, 'forall, 'forskip do not do this.
has convenience-reasons too IMHO. Nested foralls, before block-parser was
there.
> I suppose the mailing list already know this. I write it for just
> confirmation from the community.
>
> Giuseppe Chillemi
-volker
