[REBOL] Re: Context and Rebol call
From: AJMartin::orcon::net::nz at: 14-Oct-2004 13:43
Hi, Philippe.
You wrote:
> 1/ About 'context : what's the difference for Rebol between :
>>> my-context: context [ ....bla bla bla ... ]
> and
>>> context [ ....bla bla bla ... ]
>
> I noted that the first code just set one word ('my-context) in global
> context, but the other ?
This situation is the same as:
>> My-Integer: 2
and
>> 2
In all cases, Rebol evaluates each value and, as part of it's evaluation,
evaluates any necessary values to the right. When Rebol evaluates the value
to the right of the set-word (in the first example) or the first value, the
value is returned to form the value needed for the previous value's
evaluation. So the context (or 2, in my second example) is evaluated,
producing a Rebol value. That value is then used as input for the previous
value to the left. If there's no set-word! value, then nothing much further
happens. The set-word! assigns the value of the expression to the right to
the word contained in the set-word!.
I hope that helps!
---
Andrew Martin
ICQ: 26227169
http://www.rebol.it/Valley/
http://valley.orcon.net.nz/
http://valley.150m.com/
