[REBOL] Re: Submitted, for your approval.
From: edanaii:cox at: 27-May-2002 8:11
Carl Read wrote:
> Hi Ed,
>
> It works fine, though I was a bit confused by the Matched and Placed
> numbering to begin with, not realizing that once something was placed
> it was no longer recorded as matched. "Misplaced" might've been a
> better term. (;
>
> As to your code: Well you've got me wondering whether having a
> function call it's own refinements like that instead of having
> seperate functions for those routines is a good or bad thing... I
> think it probably is bad, (mainly due to a performance issue with the
> amount of code you have to get through to get to the last "if
> whatever..."), but as you've found out, it does work. Note however
> that it only works because the words you create in the function are
> global, not local. If you'd tried to make Symbol_Set local by
> having...
>
> /local Symbol_Set
>
Yep. I realize that. Next revision will likely include passing and
returning parameters.
> in the function's first block you'd get an error when calling the
> function with any refinement other than /begin. With REBOL
> functions, words defined in the body of the function are made global
> by default, not local. This is because "it's better for beginners"
> apparently. (:
>
> An alternative approach to using refinements would've been to have
> them as functions within your function. ie, just change...
>
> If Begin [
> Symbol_Set: [ "~" "!" "@" "#" "$" "%" "&" "*" ]
> Random/seed Now
> ]
>
> to...
>
> Begin: does [
> Symbol_Set: [ "~" "!" "@" "#" "$" "%" "&" "*" ]
> Random/seed Now
> ]
>
It was a good excursive in using refinements and testing the document
functionality that is built in to REBOL.
> and you can then call that with just "Begin" instead of
> "Symbols/Begin". ('does is for functions without any arguments.)
>
Yes, I thought about that, but noticed that there was no way to prefix
the subroutine with the parent one, at least not that I could see. But
then, I'm only on Chapter 7 of the official guide. :)
My preferred style would have been to call the subroutine as
Symbol.Begin. Which is one of the reasons I settled for using refinements.
As I said, this is a learning excursive for me. Sometimes the best way
to learn is to make all the mistakes you can up front. Saves time by not
making them later. :)
I'll continue to revise things as I learn more.
> Otherwise though, you're learning fast! It's good and tidy code on
> the whole.
>
Thanks. After programming for 26 years, I sure hope my code is tidy. :)
--
Sincerely, |
Ed Dana | Life's but a knife's edge, anyway. Sooner or later
Software Developer | people slip and get cut.
1Ghz Athlon Amiga | -- Larry McMurtry, Streets of Laredo
