[EMAIL PROTECTED] wrote:
> Hi Eric
>
> Thanks for the input about "action". It seems to me the documentation should
> be expanded to cover some of this stuff. As you say, it's a bit mysterious.
>
> Larry :-)
>
> PS I have been using your "huh" program for a while. It is really useful
> and interesting. Also fun!!
->> type? :none?
== action!
->> type? none?
== logic!
hmm ....
-pekr-
>
>
> ----- Original Message -----
> From: <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Wednesday, December 08, 1999 5:12 PM
> Subject: [REBOL] What is an action? Re:
>
> >
> > Larry,
> >
> > Actions are a type of "function" (in its broader Rebol sense of
> any-function!)
> > that can't be created using Rebol itself. Actions are for all practical
> > purposes the same as natives (unless you're a Rebol Creator), but there is
> > some mysterious difference I've never seen explained. Anyone know what the
> > difference is?
> >
> > For example:
> >
> > >> type? :not
> > == native!
> > >> type? :none?
> > == action!
> > >> type? :ask
> > == function!
> >
> > What you see here is the message that Rebol gives you when a datatype
> return
> > value is left over after a console command expression is evaluated. When
> you
> > do:
> >
> > >> type? function!
> > == datatype!
> >
> > what Rebol sees is the word 'function! , and when it evaluates that word
> the
> > result is the function! datatype, and when type? gets that as an argument
> it
> > returns the datatype! datatype. Now for some reason there are two
> datatypes
> > that are not assigned to a corresponding word: action! and unset! This
> > oversight can be remedied easily:
> >
> > >> action!: type? :none?
> > == action!
> > >> unset!: (type?)
> > == unset!
> >
> > I've complained about this out to feedback, twice, to no avail.
> >
> > By the way, there's a function on rebol.org you can use to print out all
> the
> > words defined in Rebol categorized by their datatype - this will allow you
> > to see which "functions" are actions, functions, natives and ops.
> >
> > http://www.rebol.org/utility/huh.r
> >
> > See you,
> > Eric
