[REBOL] Re: Setting global from within a function.
From: ryanc:iesco-dms at: 8-Feb-2001 11:34
You probably had the right idea the first time... watch close
>> n: [1 2]
== [1 2]
>> the-funk: func [the-input] [
[ if (first the-input) = 2 [ n: 42 ]
[ ]
>> the-funk n
== none
>> n
== [1 2]
>> ;correct answer, nothing happened
>> the-funk head reverse n
== 42
>> n
== 42
>>;correct answer too.
If you have'nt got it yet, you were looking for 2, which was at the
second position (second n). By using the head reverse instructions I
actually passed [2 1] to your function causing n to be set.
The REBOL part is easy, not making those damn logic errors is the
difficult part!
--Ryan
Terry Brownell wrote:
> Hello all.
>
> Another question.
>
> How do you set a global word from a func word eg;
>
> n: [1 2]
>
> the-funk: func [the-input][
> if (first the-input) = 2 [
> {Set the global value of the-input, in this case N, to som
> ething? eg: 42}
> ]
> ]
>
> the-funk n
>
> >> n
> == 42
>
> Thanks.
> Terry Brownell
>
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Ryan Cole
Programmer Analyst
www.iesco-dms.com
707-468-5400
I am enough of an artist to draw freely upon my imagination.
Imagination is more important than knowledge. Knowledge is
limited. Imagination encircles the world.
-Einstein
