Re: Josephus Circle problem

From	"Ed" <invalid@invalid.com>
Newsgroups	comp.lang.forth
Subject	Re: Josephus Circle problem
Date	2013-12-27 18:46 +1100
Organization	Aioe.org NNTP Server
Message-ID	<l9jb9n$fcf$1@speranza.aioe.org> (permalink)
References	(3 earlier) <cbOdnRHZKZd_iifPnZ2dnUVZ_j-dnZ2d@supernews.com> <l9e984$qu5$1@speranza.aioe.org> <dp6dnQj3ksmXqSbPnZ2dnUVZ_sudnZ2d@supernews.com> <l9ile7$9b9$1@speranza.aioe.org> <VbWdnVIyK-NHayHPnZ2dnUVZ_s2dnZ2d@supernews.com>

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Elizabeth D Rather wrote:
> On 12/26/2013 3:33 PM, Ed wrote:
> > ...
> > For all you know PAD is itself a permanent allocation.  Data space created
> > with ALLOT can always be un-ALLOTed after the program is run.
> >
> > If a program is to be portable and run on as many systems and as possible,
> > with as few dependencies as possible, and what's in CORE suffices or is
> > in fact better - is that not "best practice" ?
>
> It's really "best practice" to consider your objectives for this
> *particular* program. The objectives may be "to be portable and run on
> as many systems and as possible, with as few dependencies as possible,"
> but may also be a more focused purpose, such as "to run on an embedded
> platform using minimal RAM," or perhaps "to serve as an example to
> people using mainstream Forths on PCs and workstations," or even "to
> show people using mainstream Forths on PCs what the simplest possible
> solution could be."
>
> These are very different objectives. The last two, IMO, would be *less*
> useful if they adhered rigidly to CORE-only/minimum guarantees, since
> virtually no Forths are that limited, particularly on PCs. But it's
> certainly also an excellent practice to document your assumptions, such
> as the example comment I gave above.

Let's look at the objectives for this particular program:

    Paul Rubin wrote:
    > ForthFreak <forthfreak@gmail.com> writes:
    > > With a slight change to use PAD. This allows one to try different
    > > circle sizes without need for re-compilation.
    >
    > I think it's better to use ALLOT.  PAD can be as small as 64 chars.

You need to store data of indeterminate size and you decide to use PAD
which the Standard does not require and is only guaranteed to be 84 chars.

I suggest this is not "best practice" but an application of PAD which goes
well beyond what the Standard intended.  That you have a system which
allows you to get away with it, is your good luck.  I, however, would prefer
to see a solution that befits the problem and doesn't resort to 'escape clauses'
to get the job done.  If Standard Forth is any good, surely such a solution
exists (?)

Thread

Josephus Circle problem Paul Rubin <no.email@nospam.invalid> - 2013-12-23 19:12 -0800
  Re: Josephus Circle problem "Rod Pemberton" <dont_use_email@xnohavenotit.cnm> - 2013-12-24 02:49 -0500
    Re: Josephus Circle problem Paul Rubin <no.email@nospam.invalid> - 2013-12-24 01:13 -0800
      Re: Josephus Circle problem mhx@iae.nl - 2013-12-24 02:17 -0800
        Re: Josephus Circle problem ForthFreak <forthfreak@gmail.com> - 2013-12-24 03:45 -0800
          Re: Josephus Circle problem Paul Rubin <no.email@nospam.invalid> - 2013-12-24 04:25 -0800
            Re: Josephus Circle problem ForthFreak <forthfreak@gmail.com> - 2013-12-24 04:25 -0800
              Re: Josephus Circle problem Paul Rubin <no.email@nospam.invalid> - 2013-12-24 04:52 -0800
            Re: Josephus Circle problem albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-12-24 14:57 +0000
            Re: Josephus Circle problem "Ed" <invalid@invalid.com> - 2013-12-25 20:15 +1100
          Re: Josephus Circle problem mhx@iae.nl - 2013-12-24 04:36 -0800
      Re: Josephus Circle problem "Rod Pemberton" <dont_use_email@xnohavenotit.cnm> - 2013-12-24 17:05 -0500
      Re: Josephus Circle problem "WJ" <w_a_x_man@yahoo.com> - 2014-03-10 07:11 +0000
    Re: Josephus Circle problem mhx@iae.nl - 2013-12-24 02:59 -0800
  Re: Josephus Circle problem ForthFreak <forthfreak@gmail.com> - 2013-12-24 01:53 -0800
    Re: Josephus Circle problem Paul Rubin <no.email@nospam.invalid> - 2013-12-24 04:06 -0800
      Re: Josephus Circle problem ForthFreak <forthfreak@gmail.com> - 2013-12-24 04:24 -0800
  Re: Josephus Circle problem ForthFreak <forthfreak@gmail.com> - 2013-12-24 04:30 -0800
    Re: Josephus Circle problem ForthFreak <forthfreak@gmail.com> - 2013-12-24 04:35 -0800
  Re: Josephus Circle problem ForthFreak <forthfreak@gmail.com> - 2013-12-24 05:01 -0800
    Re: Josephus Circle problem Paul Rubin <no.email@nospam.invalid> - 2013-12-24 05:34 -0800
      Re: Josephus Circle problem ForthFreak <forthfreak@gmail.com> - 2013-12-24 05:22 -0800
      Re: Josephus Circle problem "Elizabeth D. Rather" <erather@forth.com> - 2013-12-24 13:25 -1000
        Re: Josephus Circle problem "Ed" <invalid@invalid.com> - 2013-12-25 20:40 +1100
          Re: Josephus Circle problem "Elizabeth D. Rather" <erather@forth.com> - 2013-12-25 09:37 -1000
            Re: Josephus Circle problem ForthFreak <forthfreak@gmail.com> - 2013-12-26 03:19 -0800
              Re: Josephus Circle problem "Elizabeth D. Rather" <erather@forth.com> - 2013-12-26 12:01 -1000
            Re: Josephus Circle problem "Ed" <invalid@invalid.com> - 2013-12-27 12:33 +1100
              Re: Josephus Circle problem Elizabeth D Rather <erather@forth.com> - 2013-12-26 17:41 -1000
                Re: Josephus Circle problem "Ed" <invalid@invalid.com> - 2013-12-27 18:46 +1100
                Re: Josephus Circle problem Mark Wills <markrobertwills@yahoo.co.uk> - 2013-12-27 02:46 -0800
                Re: Josephus Circle problem albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-12-27 13:16 +0000
                Re: Josephus Circle problem mhx@iae.nl - 2013-12-27 05:27 -0800
                Re: Josephus Circle problem albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-12-27 14:15 +0000
                Re: Josephus Circle problem "Ed" <invalid@invalid.com> - 2013-12-29 21:56 +1100
                Re: Josephus Circle problem albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-12-29 12:37 +0000
                Re: Josephus Circle problem "Ed" <invalid@invalid.com> - 2013-12-30 00:47 +1100
                Re: Josephus Circle problem "Ed" <invalid@invalid.com> - 2013-12-29 14:08 +1100
              Re: Josephus Circle problem Mark Wills <markrobertwills@yahoo.co.uk> - 2013-12-27 02:35 -0800
                Re: Josephus Circle problem Mark Wills <markrobertwills@yahoo.co.uk> - 2013-12-27 02:43 -0800
                Re: Josephus Circle problem albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-12-27 19:00 +0000
    Re: Josephus Circle problem albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-12-24 15:59 +0000
  Re: Josephus Circle problem Gerry Jackson <spam@qlikz.org> - 2013-12-24 20:07 +0000
    Re: Josephus Circle problem albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-12-24 20:31 +0000
    Re: Josephus Circle problem mhx@iae.nl - 2013-12-25 04:38 -0800
      Re: Josephus Circle problem mhx@iae.nl - 2013-12-25 06:04 -0800
      Re: Josephus Circle problem mhx@iae.nl - 2013-12-25 06:06 -0800
        Re: Josephus Circle problem Paul Rubin <no.email@nospam.invalid> - 2013-12-25 23:08 -0800
          Re: Josephus Circle problem ForthFreak <forthfreak@gmail.com> - 2013-12-26 03:31 -0800
        Re: Josephus Circle problem Gerry Jackson <spam@qlikz.org> - 2013-12-26 10:52 +0000
          Re: Josephus Circle problem Tristan Plumb <firth@trstn.net> - 2013-12-26 14:37 +0000
            Re: Josephus Circle problem Paul Rubin <no.email@nospam.invalid> - 2013-12-26 07:12 -0800
          Re: Josephus Circle problem Gerry Jackson <spam@qlikz.org> - 2013-12-26 17:31 +0000
        Re: Josephus Circle problem Ron Aaron <rambamist@gmail.com> - 2013-12-26 21:39 +0200
    Re: Josephus Circle problem anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-26 17:33 +0000

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