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Groups > comp.lang.forth > #24612
| From | "Paul E. Bennett" <Paul_E.Bennett@topmail.co.uk> |
|---|---|
| Newsgroups | comp.lang.forth |
| Subject | Re: Request for comments on a first forth program |
| Followup-To | comp.lang.forth |
| Date | 2013-07-19 19:36 +0100 |
| Organization | Hidecs Consultancy |
| Message-ID | <b4tfg7Fiu7U1@mid.individual.net> (permalink) |
| References | <87wqomga80.fsf@pestilenz.org> |
Followups directed to: comp.lang.forth
Christian Kellermann wrote:
> Dear group readers,
>
> I have been re-reading my books on Forth lately and decided to get into
> learning it finally. One of the first results have been attached to this
> article and I would like to hear your criticism about it. (If this is a
> faux pas on this list please ignore this request).
>
> It's a small and silly implementation of the BSD game robots. You ("@")
> have to escape some robots ("R") and win by luring them into holes
> ("*").
>
> I have used GNU Forth to get started, mostly because I don't know any
> forth system well enough (besides a little dabbling with amforth) to
> judge any of the existing systems.
>
> Things that did surprise me:
>
> * Working with the stack is not hard at all
> * Debugging Forth words has been easier than anticipated. I did not use
> the gforth debugging facilities though.
> * A bad choice of data structures is punished more heavily in forth due
> to unnecessary stack juggling involved than in other programming
> languages.
>
> What I don't like in my program:
>
> * The word names are probably way too verbose for forthers. Comming from
> scheme I am quite accustomed to lengthy names and could not help it so
> far.
> * Redundant code due to my ignorance of the forth metaprogramming
> facilities. I need to read up on these.
> * Unclear when to use cells or bytes as an access unit for accessing
> buffers.
> * What's the preferred coding style for longer words? Or is this a sign
> that my word is too convoluted and should be refactored?
> * The access words for the values seem too verbose, are these even
> necessary?
Look on your first attempt as the prototype and use it to write a better
specification.
[%X]
> : #moves+ #moves 1+ to #moves ;
> : #moves- #moves 1- to #moves ;
Have a look at +! as a useful word that sometimes enables you to simplify
things a bit.
I would also suggest that on the next version you write what you expect each
word to do as a glossary style comment before you write the code. This is a
more Literal style of construction and helps in that the code becomes better
documented than just relying on the stack pictures and the word's name for a
clue. That way, when you look at the code in the future on you will have a
greater speed of understanding what you were trying to do.
--
********************************************************************
Paul E. Bennett...............<email://Paul_E.Bennett@topmail.co.uk>
Forth based HIDECS Consultancy
Mob: +44 (0)7811-639972
Tel: +44 (0)1235-510979
Going Forth Safely ..... EBA. www.electric-boat-association.org.uk..
********************************************************************
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Request for comments on a first forth program Christian Kellermann <ckeen@pestilenz.org> - 2013-07-19 11:39 +0200
Re: Request for comments on a first forth program Ron Aaron <rambamist@gmail.com> - 2013-07-19 13:04 +0300
Re: Request for comments on a first forth program rickman <gnuarm@gmail.com> - 2013-07-19 12:43 -0400
Re: Request for comments on a first forth program Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-07-19 05:28 -0500
Re: Request for comments on a first forth program m.a.m.hendrix@tue.nl - 2013-07-19 03:56 -0700
Re: Request for comments on a first forth program m.a.m.hendrix@tue.nl - 2013-07-19 04:00 -0700
Re: Request for comments on a first forth program rickman <gnuarm@gmail.com> - 2013-07-19 12:51 -0400
Re: Request for comments on a first forth program Christian Kellermann <ckeen@necronomicon.my.domain> - 2013-07-20 21:28 +0200
Re: Request for comments on a first forth program anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-07-22 15:43 +0000
Re: Request for comments on a first forth program hughaguilar96@yahoo.com - 2013-07-24 20:00 -0700
Re: Request for comments on a first forth program Christian Kellermann <ckeen@pestilenz.org> - 2013-07-25 10:37 +0200
Re: Request for comments on a first forth program hughaguilar96@yahoo.com - 2013-07-26 00:00 -0700
Re: Request for comments on a first forth program Christian Kellermann <ckeen@pestilenz.org> - 2013-07-26 09:34 +0200
Re: Request for comments on a first forth program "Elizabeth D. Rather" <erather@forth.com> - 2013-07-25 21:40 -1000
Re: Request for comments on a first forth program hughaguilar96@yahoo.com - 2013-07-27 20:16 -0700
Re: Request for comments on a first forth program Christian Kellermann <ckeen@pestilenz.org> - 2013-07-29 10:09 +0200
Re: Request for comments on a first forth program m.a.m.hendrix@tue.nl - 2013-07-29 04:14 -0700
Re: Request for comments on a first forth program Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-07-29 07:49 -0500
Re: Request for comments on a first forth program "Elizabeth D. Rather" <erather@forth.com> - 2013-07-29 15:32 -1000
Re: Request for comments on a first forth program hughaguilar96@yahoo.com - 2013-07-31 17:50 -0700
Re: Request for comments on a first forth program Christian Kellermann <ckeen@pestilenz.org> - 2013-07-31 13:23 +0200
Re: Request for comments on a first forth program hughaguilar96@yahoo.com - 2013-07-31 18:05 -0700
Re: Request for comments on a first forth program Christian Kellermann <ckeen@pestilenz.org> - 2013-08-01 12:53 +0200
Re: Request for comments on a first forth program "Elizabeth D. Rather" <erather@forth.com> - 2013-08-01 09:58 -0500
Re: Request for comments on a first forth program hughaguilar96@yahoo.com - 2013-08-01 20:42 -0700
Re: Request for comments on a first forth program Brad Eckert <hwfwguy@gmail.com> - 2013-08-04 18:53 -0700
Re: Request for comments on a first forth program "Elizabeth D. Rather" <erather@forth.com> - 2013-08-04 22:05 -0500
Re: Request for comments on a first forth program hughaguilar96@yahoo.com - 2013-08-04 20:54 -0700
Re: Request for comments on a first forth program Alex McDonald <blog@rivadpm.com> - 2013-08-05 05:50 -0700
Re: Request for comments on a first forth program Christian Kellermann <ckeen@pestilenz.org> - 2013-08-05 22:14 +0200
Re: Request for comments on a first forth program hughaguilar96@yahoo.com - 2013-08-06 21:11 -0700
Re: Request for comments on a first forth program "Elizabeth D. Rather" <erather@forth.com> - 2013-08-01 01:04 -0500
Re: Request for comments on a first forth program albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-07-19 18:06 +0000
Re: Request for comments on a first forth program Christian Kellermann <ckeen@necronomicon.my.domain> - 2013-07-20 21:31 +0200
Re: Request for comments on a first forth program Christian Kellermann <ckeen@necronomicon.my.domain> - 2013-07-20 21:24 +0200
Re: Request for comments on a first forth program anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-07-22 15:32 +0000
Re: Request for comments on a first forth program Alex McDonald <blog@rivadpm.com> - 2013-07-19 06:49 -0700
Re: Request for comments on a first forth program Christian Kellermann <ckeen@necronomicon.my.domain> - 2013-07-20 21:34 +0200
Re: Request for comments on a first forth program Mark Wills <markrobertwills@yahoo.co.uk> - 2013-07-19 07:19 -0700
Re: Request for comments on a first forth program Christian Kellermann <ckeen@necronomicon.my.domain> - 2013-07-20 21:41 +0200
Re: Request for comments on a first forth program "Elizabeth D. Rather" <erather@forth.com> - 2013-07-19 07:55 -1000
Re: Request for comments on a first forth program Christian Kellermann <ckeen@necronomicon.my.domain> - 2013-07-20 21:47 +0200
Re: Request for comments on a first forth program "Elizabeth D. Rather" <erather@forth.com> - 2013-07-20 11:15 -1000
Re: Request for comments on a first forth program hughaguilar96@yahoo.com - 2013-07-20 20:09 -0700
Re: Request for comments on a first forth program "Paul E. Bennett" <Paul_E.Bennett@topmail.co.uk> - 2013-07-19 19:36 +0100
Re: Request for comments on a first forth program albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-07-20 12:36 +0000
Re: Request for comments on a first forth program Christian Kellermann <ckeen@necronomicon.my.domain> - 2013-07-20 21:53 +0200
Re: Request for comments on a first forth program Coos Haak <chforth@hccnet.nl> - 2013-07-21 02:02 +0200
Re: Request for comments on a first forth program "Elizabeth D. Rather" <erather@forth.com> - 2013-07-20 17:18 -1000
Re: Request for comments on a first forth program Ian Osgood <iano@quirkster.com> - 2013-07-23 16:07 -0700
Re: Request for comments on a first forth program Christian Kellermann <ckeen@necronomicon.my.domain> - 2013-07-20 21:48 +0200
Re: Request for comments on a first forth program stephenXXX@mpeforth.com (Stephen Pelc) - 2013-07-20 12:18 +0000
Re: Request for comments on a first forth program Christian Kellermann <ckeen@necronomicon.my.domain> - 2013-07-20 21:57 +0200
Re: Request for comments on a first forth program "Elizabeth D. Rather" <erather@forth.com> - 2013-07-20 11:24 -1000
Re: Request for comments on a first forth program Christian Kellermann <ckeen@pestilenz.org> - 2013-07-22 15:53 +0200
Re: Request for comments on a first forth program m.a.m.hendrix@tue.nl - 2013-07-22 08:06 -0700
Re: Request for comments on a first forth program albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-07-22 19:35 +0000
Re: Request for comments on a first forth program m.a.m.hendrix@tue.nl - 2013-07-23 00:41 -0700
Re: Request for comments on a first forth program Christian Kellermann <ckeen@pestilenz.org> - 2013-07-23 12:00 +0200
Re: Request for comments on a first forth program albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-07-23 12:10 +0000
Re: Request for comments on a first forth program Christian Kellermann <ckeen@pestilenz.org> - 2013-07-23 14:19 +0200
Re: Request for comments on a first forth program stephenXXX@mpeforth.com (Stephen Pelc) - 2013-07-24 09:27 +0000
Re: Request for comments on a first forth program anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-07-23 13:44 +0000
Re: Request for comments on a first forth program hughaguilar96@yahoo.com - 2013-07-20 20:02 -0700
Re: Request for comments on a first forth program albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-07-21 03:36 +0000
Re: Request for comments on a first forth program hughaguilar96@yahoo.com - 2013-07-20 22:28 -0700
Re: Request for comments on a first forth program albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-07-21 10:31 +0000
Re: Request for comments on a first forth program rickman <gnuarm@gmail.com> - 2013-07-20 23:41 -0400
Re: Request for comments on a first forth program anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-07-22 15:36 +0000
Re: Request for comments on a first forth program Lars Brinkhoff <lars.spam@nocrew.org> - 2013-07-23 12:22 +0200
Re: Request for comments on a first forth program Christian Kellermann <ckeen@pestilenz.org> - 2013-07-23 13:44 +0200
Re: Request for comments on a first forth program albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-07-23 12:26 +0000
Re: Request for comments on a first forth program "Elizabeth D. Rather" <erather@forth.com> - 2013-07-23 07:10 -1000
Re: Request for comments on a first forth program stephenXXX@mpeforth.com (Stephen Pelc) - 2013-07-24 09:30 +0000
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