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Erik Naggum  
View profile  
 More options Apr 1 2002, 4:06 am
Newsgroups: comp.lang.lisp
From: Erik Naggum <e...@naggum.net>
Date: Mon, 01 Apr 2002 09:06:13 GMT
Local: Mon, Apr 1 2002 4:06 am
Subject: Re: is lisp a general purpose lang?
* cr88192 <cr88...@hotmail.com>
| I got a copy of the ansi spec, and am almost intimidated by the size...
| hopefully I really don't have to read that much...

  Excuse me?  You hope you do not have to read a thousand pages?  Why?  Are
  you illiterate or very hard of reading or something?  I have not kept
  record of how much I read every year, but it must be at least 12 000
  pages of nonfiction alone.  For the past 25 years or so, I have set aside
  2 hours a day to study or just read about something _unrelated_ to what I
  need to learn or work with, and probably spend even more on work-related
  reading.  This is in my view not a lot.  Learning to read and type fast,
  efficiently, and accurately is a requirement in modern society.

  With only two hours a day, the Common Lisp standard should take you no
  more than a month, with plenty of time to think about what you read, take
  notes, including deferring stuff for a later pass.  That is not, again in
  my view, not a lot to require of someone who wants to become a serious
  user of a programming language.  30 years of wisdom and insight in the
  Lisp community is made available in only 30 days.  Of course, it will
  take much longer to make use of all this, but at least you have been
  through it and have thought about it and provided a large number of
  "hook" on which you can hang various information you get when you ask
  people, and you can make connections that people who simply lack the
  knowledge cannot.

| I see emphasis placed on 1100 pages... r5rs is 50...  sorry if this is a
| problem...

  It means that R5RS is a short story you might chuckle or shudder at
  before you forget it while ANSI X3.226-1994 is a novel that enriches your
  character.

| really I want to implement the one that is hopefully simpler and
| hopefully have an underlying system flexible enough to include both.

  Why the hell do you want to implement it?

| when I was younger I used to use big books for bragging rights (I would
| say: I read this, and point to a 1000 to 1500 page book, but really I
| don't want to read that much...).

  Oh, so _that_ is the reason these idiot books were printed on cardboard
  with 36-point type.  Idiot bragging rights!  Good thing I never even
  thought of buying any of those.  My >1000-volume personal library seems
  to average about 400 pages to a volume, and a _large_ fraction of my
  books are more than 1000 pages thick, but they are printed on thin, high
  quality paper, not recycled cardboard, with fairly small print, not at
  all suitable for the fourth-grade reading level of most "computer" books.

| luckily the spec I got claims to be a simplified version, I do hope so...

  No, it is not, the HyperSpec (ANSI standard) is a standard.  Maybe Common
  Lisp is just not for you.

| oh yeah, I have no access to a real lisp machine so info about how one is
| put together might be helpful.

  Maybe you just need a Common Lisp environment that has already been built
  for you?

///
--
  In a fight against something, the fight has value, victory has none.
  In a fight for something, the fight is a loss, victory merely relief.


 
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Kent M Pitman  
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 More options Apr 1 2002, 4:35 am
Newsgroups: comp.lang.lisp
From: Kent M Pitman <pit...@world.std.com>
Date: Mon, 1 Apr 2002 09:33:54 GMT
Local: Mon, Apr 1 2002 4:33 am
Subject: Re: is lisp a general purpose lang?

cr88192 <cr88...@hotmail.com> writes:
> maybe at a later date one could alter a scheme interpretter into a cl
> interpretter, I don't know.

maybe at a later date one could alter an esperanto understander into an
english understander, too.  certainly it's simpler to start with esperanto.
i just don't see the point.

> for me all of this is new domain (but I try anyways)...

just learn the languages separately and use them for a while on their
own terms.  you don't do yourself a service by pretending that java is
c++ nor vice versa.  nor will you learn much about either language by
staying in the subset that both support, if any.

cl and scheme are similarly related.

i think you are taking the long, difficult road to understanding.
but you're welcome to try.


 
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Fernando Rodríguez  
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 More options Apr 1 2002, 5:33 am
Newsgroups: comp.lang.lisp
From: Fernando Rodríguez <f...@wanadoo.es>
Date: Mon, 01 Apr 2002 12:33:33 +0200
Local: Mon, Apr 1 2002 5:33 am
Subject: Re: is lisp a general purpose lang?
On 30 Mar 2002 13:54:26 -0800, lab.stih...@unidavi.edu.br (Fred Stihler)
wrote:

>I was looking for some info on what would be a good lang for general
>purpose programming. What I mean it: is it fast? is it good for
>database systems? is it good for GUI programmin (on ms windows
>mostly)? Well, I know that I would know better if I go and read all
>about it. But the problem is that there is too many langs out there
>and too many books about it. I would spend several years just to
>decide what lang would be the better choice to star learning.

You want to learn programming? If you are a total beginner, I think it's a
better idea to start with scheme instead of common lisp. It's a simpler lisp
dialect that has been designed for teaching.  Besides, there are _great_ (and
I mean _great_) books that use it to teach programming.

Try any of these books:
In order of increasing difficulty

"The Schemer's Guide" (Available at www.schemers.com)
"How to design programs"
"Scheme and the art of programming"
"Concrete abstractions"
"Structure and intepretation of computer programs" (Esse é foda ;-)

Don't worry about GUI and database stuff right now. That's trivial, and as
soon as you master basic concepts such as data and procedure abstraction, or
common program design techniques, learning those things will be very easy.

Read this article, it might help you:
http://www.fernando-rodriguez.com/high-school-computing.html

Vai fundo! ;-)

-----------------------
Fernando Rodriguez


 
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Erik Naggum  
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 More options Apr 1 2002, 7:09 am
Newsgroups: comp.lang.lisp
From: Erik Naggum <e...@naggum.net>
Date: Mon, 01 Apr 2002 12:09:26 GMT
Local: Mon, Apr 1 2002 7:09 am
Subject: Re: is lisp a general purpose lang?
* Fernando Rodríguez
| You want to learn programming?  If you are a total beginner, I think it's
| a better idea to start with scheme instead of common lisp.  It's a
| simpler lisp dialect that has been designed for teaching.

  I strongly disagree.  Scheme destroys the minds of programmers much more
  and much worse than BASIC is rumored to do.  In order to learn to use any
  other programming language, a Scheme-trained programmer has to forget all
  of Scheme and relearn everything from scratch.  This is doable, but such
  a horribly inefficient way of doing things.

| "How to design programs"

  I have to admit, though, this looks like a _great_ book.

| "Structure and intepretation of computer programs" (Esse é foda ;-)

  I no longer think this is a great book.  It teaches differences where no
  basis for comparison has been laid.

///
--
  In a fight against something, the fight has value, victory has none.
  In a fight for something, the fight is a loss, victory merely relief.


 
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Nils Goesche  
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 More options Apr 1 2002, 7:24 am
Newsgroups: comp.lang.lisp
From: Nils Goesche <n...@cartan.de>
Date: 01 Apr 2002 14:23:58 +0200
Local: Mon, Apr 1 2002 7:23 am
Subject: Re: is lisp a general purpose lang?

cr88192 <cr88...@hotmail.com> writes:
> I don't know what I am doing, that is why progress is slow...
> scheme seems like it will be easy to implement, so that is what I will try
> to create...
> maybe at a later date one could alter a scheme interpretter into a cl
> interpretter, I don't know... or maybe just strip off and replace it...
> scheme seems good enough for now...

There is a book that shows how to express one language in terms
of the other, you might find it useful to get a feeling for the task:

``Lisp in Small Pieces'' by Christian Queinnec

Regards,
--
Nils Goesche
Ask not for whom the <CONTROL-G> tolls.

PGP key ID 0xC66D6E6F


 
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Joe Marshall  
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 More options Apr 1 2002, 10:41 am
Newsgroups: comp.lang.lisp
From: "Joe Marshall" <prunesqual...@attbi.com>
Date: Sun, 31 Mar 2002 00:00:09 GMT
Local: Sat, Mar 30 2002 7:00 pm
Subject: Re: is lisp a general purpose lang?

"Bulent Murtezaoglu" <b...@acm.org> wrote in message

news:87zo0pbsex.fsf@nkapi.internal...

> >>>>> "FS" == Fred Stihler <lab.stih...@unidavi.edu.br> writes:

>     FS> is it good for GUI programmin
>     FS> (on ms windows mostly)?

> This depends on what implementation you buy.

> For free implementations on MS Windows you will not find a GUI system
> polished enough to be both good and usable out of the box by a novice.
> (Folks: flame me if I am not right.)  If you know how to program GUIs
> under Windows, Corman (www.corman.net) gives you full access to the
> windows api but doesn't wrap a lispy toolkit on top of it AFAIK.

As much as I'd *love* to increase the level of vitriol in this group, I'll
refrain from flaming you.

It so happens that I've been programming a little game in Corman Lisp
with my daughter.  It is true that Corman Lisp does not provide an API
like CLIM.  It does, however, come with some code that wraps the
windows message pump with some CLOS classes so you can simply
write some methods and let the generic function dispatch handle the
details.  This is much easier than interfacing to the raw windows API.

So if you have some familiarity with how windows programs work
(vis-a-vis messages, windows, device contexts, etc.) the Corman lisp
API will work just fine.

As far as performance goes, it's more than adequate.  The little breakout
game I've been helping my daughter with runs at a refresh rate of 30
frames per second and is only consuming 2% or so of the processor.
(The lisp is yielding its timeslice when it finishes a frame.)  GC pauses
are almost unnoticable.


 
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Joe Marshall  
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 More options Apr 1 2002, 10:41 am
Newsgroups: comp.lang.lisp
From: "Joe Marshall" <prunesqual...@attbi.com>
Date: Sun, 31 Mar 2002 00:02:25 GMT
Local: Sat, Mar 30 2002 7:02 pm
Subject: Re: is lisp a general purpose lang?

"Siegfried Gonzi" <siegfried.go...@kfunigraz.ac.at> wrote in message

news:3CA64573.5060709@kfunigraz.ac.at...

> b) The price of Allegro Common Lisp is quite high (above USD 4000.- for
> the personal edition; and a little bit a lot higher for the enterprise
> edition; the last information was: USD 10000.-). Though, there is a free
> evaluation copy available but in the long run this is not the solution.
> And they even charge (in addition) for every copy of your program you
> sell to a customer.

> c) LispWorks from Xanalys has competive prices. They even have got a
> free copy of their version for private users; but do not fall for to
> believe you can use it on a daily basis. The evaluation copy has got
> very limited heap sizes and it is only intented for training purposes
> (maybe a Lisp course in high school).

Corman Common Lisp is priced quite reasonably, too.

 
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Joe Marshall  
View profile  
 More options Apr 1 2002, 10:47 am
Newsgroups: comp.lang.lisp
From: "Joe Marshall" <prunesqual...@attbi.com>
Date: Sun, 31 Mar 2002 22:06:33 GMT
Local: Sun, Mar 31 2002 5:06 pm
Subject: Re: is lisp a general purpose lang?

"Siegfried Gonzi" <siegfried.go...@kfunigraz.ac.at> wrote in message

news:3CA75C55.20902@kfunigraz.ac.at...

> Citation: "Basic Lisp techniques", by Cooper, Jr. (the foreword is
> authored by Franz Inc):

> "Other languages have tried to mimic CL, with limited success. Perl,
> Python, Java,C++,C#, -- they all incorporate some of the features that
> give Lisp its power, but their implementations tend to be brittle".

> Sorry, but the above sentence is ridiculous!

Looks ok to me.

Perhaps you think other languages have not tried to mimic CL?
Or perhaps they had unlimited success?
Or maybe that Perl, Python, C++, C# don't incorporate any of
the features that give Lisp its power?
Or that their implementations aren't brittle?

No, wait, I've got it.  There's actually TWO sentences there.
You're objecting to the period at the end.  Well, I suppose
a semicolon might be better.


 
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Paolo Amoroso  
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 More options Apr 1 2002, 10:50 am
Newsgroups: comp.lang.lisp
From: Paolo Amoroso <amor...@mclink.it>
Date: Mon, 01 Apr 2002 17:44:19 +0200
Local: Mon, Apr 1 2002 10:44 am
Subject: Re: is lisp a general purpose lang?

On Sun, 31 Mar 2002 21:04:29 -0500, cr88192 <cr88...@hotmail.com> wrote:
> I got a copy of the ansi spec, and am almost intimidated by the size...
> hopefully I really don't have to read that much...

Understanding why the HyperSpec is not intimidating is part of the learning
process of Common Lisp. Hint: Common Lisp is not a toy, it was created by
experienced designers to solve large and complex problems in industry and
research. This is not a "for dummies" or "teach yourself in 21 days"
language.

Paolo
--
EncyCMUCLopedia * Extensive collection of CMU Common Lisp documentation
http://www.paoloamoroso.it/ency/README
[http://cvs2.cons.org:8000/cmucl/doc/EncyCMUCLopedia/]


 
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Paolo Amoroso  
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 More options Apr 1 2002, 10:50 am
Newsgroups: comp.lang.lisp
From: Paolo Amoroso <amor...@mclink.it>
Date: Mon, 01 Apr 2002 17:44:18 +0200
Local: Mon, Apr 1 2002 10:44 am
Subject: Re: is lisp a general purpose lang?

On Sun, 31 Mar 2002 18:34:19 -0500, cr88192 <cr88...@hotmail.com> wrote:
> I have been programming lisp (actually: scheme) for... 2 months...
> I still do most of my work in c as one can't really use lisp so much for os
> programming...

This is really funny. If by "os" you mean "operating system", then you are
wrong. Lisp was also used to write some of the most powerful operating
systems in the history of computing.

> but since I am limited in knowlege of either one there may be details in
> the way...
> maybe I should finish reading r5rs...

You may want to expand your reading list a bit.

Paolo
--
EncyCMUCLopedia * Extensive collection of CMU Common Lisp documentation
http://www.paoloamoroso.it/ency/README
[http://cvs2.cons.org:8000/cmucl/doc/EncyCMUCLopedia/]


 
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Julian Stecklina  
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 More options Apr 1 2002, 11:46 am
Newsgroups: comp.lang.lisp
From: Julian Stecklina <der_jul...@web.de>
Date: 01 Apr 2002 18:44:07 +0200
Local: Mon, Apr 1 2002 11:44 am
Subject: Re: is lisp a general purpose lang?

cr88192 <cr88...@hotmail.com> writes:
> oh yeah, I have no access to a real lisp machine so info about how one is
> put together might be helpful. my design is basically making an
> interpretter the secondary "core" of the os, the first "core" holds all the
> basic system stuff (mm, ints, timing...). drivers are located outside
> either core. the idea is that programs will sit on top of the cores and
> drivers (collectivly known as the kernel).
> is this concept design good?
> as of yet the real line between parts is a little less clear...

OS coders in comp.lang.lisp. I actually got a little bit tired of
wannabe OS codes in de.comp.lang.assembler.x86 and I only wanted to
tell you that planning is more important than anything else. It will
be especially unimportant whether your design is "good", if you fail
in implementation. I do *not* have as much programming experience as
most posters here (perhaps 3 years hobby programming), but this is a
lesson I often had to learn.

I even once self belonged to the doomed group of people believing to
be able to produce an perhaps useful mini operating system. I still
believe one man is able to produce something like this, but not
without having spent some time with planning.

Regards,
Julian
--
Meine Hompage: http://julian.re6.de

Ich suche eine PCMCIA v1.x type I/II/III Netzwerkkarte.
Ich biete als Tauschobjekt eine v2 100MBit Karte in OVP.


 
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ozan s yigit  
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 More options Apr 1 2002, 12:00 pm
Newsgroups: comp.lang.lisp
From: ozan s yigit <o...@blue.cs.yorku.ca>
Date: 01 Apr 2002 11:41:33 -0500
Local: Mon, Apr 1 2002 11:41 am
Subject: Re: is lisp a general purpose lang?
Nils Goesche:

> There is a book that shows how to express one language in terms
> of the other, you might find it useful to get a feeling for the task:

> ``Lisp in Small Pieces'' by Christian Queinnec

i second this recommendation, it is a wonderful, but a demanding book;
in my view it is the true heir to "anatomy of lisp" but it may be too
scheme-centric for some.

oz
--
www.cs.yorku.ca/~oz       | if you couldn't find any weirdness, maybe
york u. computer science | we'll just have to make some!   -- hobbes


 
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Thomas Bushnell, BSG  
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 More options Apr 1 2002, 12:00 pm
Newsgroups: comp.lang.lisp
From: tb+use...@becket.net (Thomas Bushnell, BSG)
Date: 01 Apr 2002 09:00:00 -0800
Subject: Re: is lisp a general purpose lang?

Erik Naggum <e...@naggum.net> writes:
>   In order to learn to use any other programming language, a
>   Scheme-trained programmer has to forget all of Scheme and relearn
>   everything from scratch.  

This is directly contradicted by the experience of those universities
that use Scheme to teach elementary programming--MIT, Oberlin, Rice,
and others.  There is no particular difficulty in moving on to other
languages and other styles of programming.

Thomas


 
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Nils Goesche  
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 More options Apr 1 2002, 12:15 pm
Newsgroups: comp.lang.lisp
From: Nils Goesche <n...@cartan.de>
Date: 01 Apr 2002 19:15:09 +0200
Local: Mon, Apr 1 2002 12:15 pm
Subject: Re: is lisp a general purpose lang?
tb+use...@becket.net (Thomas Bushnell, BSG) writes:

> Erik Naggum <e...@naggum.net> writes:

> >   In order to learn to use any other programming language, a
> >   Scheme-trained programmer has to forget all of Scheme and relearn
> >   everything from scratch.  

> This is directly contradicted by the experience of those universities
> that use Scheme to teach elementary programming--MIT, Oberlin, Rice,
> and others.  There is no particular difficulty in moving on to other
> languages and other styles of programming.

Look up the thread ``one small function'' or so.  Seems to be not
so easy...

Regards,
--
Nils Goesche
Ask not for whom the <CONTROL-G> tolls.

PGP key ID #xC66D6E6F


 
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cr88192  
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 More options Apr 1 2002, 12:46 pm
Newsgroups: comp.lang.lisp
From: cr88192 <cr88...@hotmail.com>
Date: Mon, 1 Apr 2002 09:46:32 -0500
Local: Mon, Apr 1 2002 9:46 am
Subject: Re: is lisp a general purpose lang?
I can read well enough, I just don't really read fast and I don't like
reading mass amounts of stuff. I rather like things to be hopefully concise.

please don't call me illeterate.

by "simplified" I had meant: not massivly long...
I have before read long books, ie: my sql book was about that long, but I
took about 2 months...

I like smaller time frames, ie: a few hours...

in my mind one can blame english more than text, as it is the mass of
english like semantics that I don't like...


 
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Erik Naggum  
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 More options Apr 1 2002, 1:12 pm
Newsgroups: comp.lang.lisp
From: Erik Naggum <e...@naggum.net>
Date: Mon, 01 Apr 2002 18:12:21 GMT
Local: Mon, Apr 1 2002 1:12 pm
Subject: Re: is lisp a general purpose lang?
* Erik Naggum

> In order to learn to use any other programming language, a Scheme-trained
> programmer has to forget all of Scheme and relearn everything from
> scratch.

* Thomas Bushnell, BSG
| This is directly contradicted by the experience of those universities
| that use Scheme to teach elementary programming--MIT, Oberlin, Rice, and
| others.

  My education is from the University of Oslo, Informatics Department,
  which brags that its senior staff invented Simula and object-oriented
  programming.  They thought, for many years, that their students were not
  hampered by, indeed benefited from, learning Simula in their introductory
  courses.  Industry, students, etc, disagreed strongly.  Now they teach
  Java.  At the University of Bergen, the same story played out.

  For some reason, I do not generally trust people who would be seriously
  financially or prestigeously damaged if the argument they make turned out
  to be untrue, which is why I tend to push the prestige button on people
  to see if their stake is personal.  Some, like you, tend to take this
  very deeply personally, but prove to be untrustworthy because of it.

| There is no particular difficulty in moving on to other languages and
| other styles of programming.

  There is ample evidence here and elsewhere to the contrary.  That you say
  something does not make it true.  When you jump out to contradict me,
  there is reason to believe it not even true to begin with.  All this crap
  about writing your advisors and now your department proves that you lack
  the integrity and intellectual honesty that would have made you useful
  int his forum.  However, as long as you can be seriously hurt by being a
  retarded prick in your department, it is likely that you manage to fake a
  reasonably conforming student and obey those rules that are necessary to
  get your degree, but none others, just like that line about your boss
  that you claim people misunderstood.  So when you say something that
  simply contradicts something I have said, we have reason to believe that
  (1) you would be hurt if the truth I have spoken came out, and (2) your
  inability to deal with arguments leads you to attack the person and want
  to ambarrass and make unpleasant noises devoid of contents.  Instead,
  just provide valid and useful counter-information.  I do not think you
  can do that any more than ozan s yigit can, but feel free to change my
  mind -- I will if you provide different facts.  That is the difference
  between the two of us.

///
--
  In a fight against something, the fight has value, victory has none.
  In a fight for something, the fight is a loss, victory merely relief.


 
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Christopher Browne  
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 More options Apr 1 2002, 1:18 pm
Newsgroups: comp.lang.lisp
From: Christopher Browne <cbbro...@acm.org>
Date: Mon, 01 Apr 2002 13:15:12 -0500
Local: Mon, Apr 1 2002 1:15 pm
Subject: Re: is lisp a general purpose lang?

cr88192 <cr88...@hotmail.com> wrote:
> I can read well enough, I just don't really read fast and I don't like
> reading mass amounts of stuff. I rather like things to be hopefully concise.

> please don't call me illeterate.

> by "simplified" I had meant: not massivly long...
> I have before read long books, ie: my sql book was about that long, but I
> took about 2 months...

> I like smaller time frames, ie: a few hours...

> in my mind one can blame english more than text, as it is the mass of
> english like semantics that I don't like...

Take a look at Peter Norvig's essay:

  <http://www.norvig.com/21-days.html>
  _Teach Yourself Programming in Ten Years_

Pretending that you can learn anything meaningful in an hour's worth
of reading is just silly.

A university degree requires committing on the order of four years,
and it's easy enough to conclude "That wasn't enough; I need the
MSc/Ph.D" and find that the process takes on the order of ten years.
--
(reverse (concatenate 'string "moc.adanac@" "enworbbc"))
http://www.ntlug.org/~cbbrowne/linux.html
Rules of the Evil Overlord #81. "If I am fighting with the hero atop a
moving platform, have disarmed him, and am about to finish him off and
he glances behind  me and drops flat, I too will  drop flat instead of
quizzically turning around to find out what he saw."
<http://www.eviloverlord.com/>


 
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cr88192  
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 More options Apr 1 2002, 1:55 pm
Newsgroups: comp.lang.lisp
From: cr88192 <cr88...@hotmail.com>
Date: Mon, 1 Apr 2002 10:55:29 -0500
Local: Mon, Apr 1 2002 10:55 am
Subject: Re: is lisp a general purpose lang?
> Take a look at Peter Norvig's essay:

>   <http://www.norvig.com/21-days.html>
>   _Teach Yourself Programming in Ten Years_

point taken...

> Pretending that you can learn anything meaningful in an hour's worth
> of reading is just silly.

it is funny sometimes how long advancing generally takes... sometimes I
wonder why I can't just seem to cram large amounts of information and just
start making stuff...
I guess that is life...

> A university degree requires committing on the order of four years,
> and it's easy enough to conclude "That wasn't enough; I need the
> MSc/Ph.D" and find that the process takes on the order of ten years.

mostly I just think: if it takes that long to explain it, how much longer
would it take to implement...
scheme seems as if it would be easier to implement, just under the idea
that it is minimalist.
or have I been missing something?

ok, I could drop the idea of trying to support both, and maybe think about
it later.

for now I think I will continue with what I was doing before: reading r5rs
and fiddling with my kernel...
I don't know, I may read ansi spec and look at the workings of a few cl
interpreters. I will think.


 
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Erik Naggum  
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 More options Apr 1 2002, 2:15 pm
Newsgroups: comp.lang.lisp
From: Erik Naggum <e...@naggum.net>
Date: Mon, 01 Apr 2002 19:15:16 GMT
Local: Mon, Apr 1 2002 2:15 pm
Subject: Re: is lisp a general purpose lang?
* cr88192 <cr88...@hotmail.com>
| I can read well enough, I just don't really read fast and I don't like
| reading mass amounts of stuff.  I rather like things to be hopefully concise.

  Then you are at such a disadvantage in contemporary IT that you should
  work really hard to improve your reading speed.  Double it, then double
  it again.  A regular paperback page of prose (say, something by Tom
  Clancy or John Grisham) should take no more than 15 seconds to read with
  no loss of comprehension, and the ISO standard for Ada should take no
  more than 5 minutes per page, on average.

| in my mind one can blame english more than text, as it is the mass of
| english like semantics that I don't like...

  As long as you do not like it, that dislike will always stand between you
  and mastering it.  Make up your mind to like it, work hard to get really
  good at it, and you will like it.  This applies to all things you want to
  learn well.  If you cannot like something, leave it behind and find
  something else that you can.  Life is too long to spend it on things you
  do not like or become good at what you have to do.

///
--
  In a fight against something, the fight has value, victory has none.
  In a fight for something, the fight is a loss, victory merely relief.


 
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cr88192  
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 More options Apr 1 2002, 2:41 pm
Newsgroups: comp.lang.lisp
From: cr88192 <cr88...@hotmail.com>
Date: Mon, 1 Apr 2002 11:41:25 -0500
Local: Mon, Apr 1 2002 11:41 am
Subject: Re: is lisp a general purpose lang?

Erik Naggum wrote:
> * cr88192 <cr88...@hotmail.com>
> | I can read well enough, I just don't really read fast and I don't like
> | reading mass amounts of stuff.  I rather like things to be hopefully
> | concise.

>   Then you are at such a disadvantage in contemporary IT that you should
>   work really hard to improve your reading speed.  Double it, then double
>   it again.  A regular paperback page of prose (say, something by Tom
>   Clancy or John Grisham) should take no more than 15 seconds to read with
>   no loss of comprehension, and the ISO standard for Ada should take no
>   more than 5 minutes per page, on average.

when I was younger I was supposedly mildly dyslexic, if that has any real
bearing on reading speed.

I really don't like reading fiction books either for similar reasons I
don't like long books... I can just watch movies...

luckily at least I can read code at a much faster rate than I can read
text, I don't really know why.
often when reading code I use page down comparred with scrolling, but text
is the opposite.

a little off topic, I once tried to write a small description of lambda
calculus (where I was trying to explain it in a much more compact way than
a book I was reading, which took a whole chapter...):
{
lambda calculus is a system of substitution. you will have a "lambda
expression" that will perform operations by being applied to expressions.
each will have the symbol lambda followed by some variable, this may be
several levels deep (here I will use L to denote lambda). after this there
is an expression (for which what is being combined with is substituted
into).  consider: Lx.x2 , this may be combined with some other expression
by enclosing it in parenthesis, then it is combined with something: say
dog, in which case you have (Lx.x2)dog which converts to dog2 , I will use
-> to indicate this process. this works because dog was substituted in for
x. each lambda term will have an associated variable (which whatever is
substituted in for in the expression). after this the lambda term
disappears (as it was used). these are combined in a left to right order.
if the variable associated with the lambda term does not exist, then
nothing is substituted in. if the variable exists within the expression and
is part of a lambda term then the variable is referred to a being bound
within the expression. variables that are part of a lambda term but do not
exist within the expression are unbound, and ones that are not associated
with a lambda term but are in the expression are referred to as free.
consider: LxLy.x and LxLy.y, in the first y is unbound, and in the second x
is unbound. consider each is combined first with dog and then with cat.
((LxLy.x)dog)cat -> (Ly.dog)cat -> dog, and ((LxLy.y)dog)cat -> (Ly.y)cat
-> cat. when multiple layers of parenthesis are involved the inmost are
evaluated first, then it moves outward.  consider if these were used as
true and false (true=LxLy.x, false=LxLy.y), then a statement could be made
if=LaLbLc.(((a)b)c) that could select between terms based on the condition
of a. thus: ((((if)false)dog)cat) would evaluate to cat, and
((((if)true)dog)cat) would be dog.  consider: LxLy.xz, in this expression x
is bound, y is unbound, and z is free. free variables are a hairy mess in
my opinion, as it is always possible for the variable to adversely effect
the expression (except if say it were combined with 0, then z would be
irrelevant).  lambda calculus can be quite useful.

}

and, like this, the book did not really explain how it can really be used...

I wrote similar for predicate logic as well, but I will not include it...


 
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Erik Naggum  
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 More options Apr 1 2002, 3:51 pm
Newsgroups: comp.lang.lisp
From: Erik Naggum <e...@naggum.net>
Date: Mon, 01 Apr 2002 20:51:16 GMT
Local: Mon, Apr 1 2002 3:51 pm
Subject: Re: is lisp a general purpose lang?
* cr88192 <cr88...@hotmail.com>
| when I was younger I was supposedly mildly dyslexic, if that has any real
| bearing on reading speed.

  So was I.  Thosuands of hours of hard work cured it completely.  Dyslexia
  is the result a persistent problem in how reading and writing is taught,
  not a disorder.  All students benefit from a very different way to read
  and write than the stupid ways that only accidentally produce people who
  can spell correctly and read fast.  In brief, words are really images
  made up of strokes.  I consider the individual letter approach to those
  strokes vastly superior to the ideographic scripts.  If you have not
  learned to see words as images, not as individual characters, by the time
  you are ten years old, it takes an _enormous_ effort to fix it, but trust
  me: it is worth it.  Nothing beats the written word's ability to save you
  time in learning from somebody else's experiences, skills, and wisdom.
  Just make up your mind to like it, then work hard to actually like it.

///
--
  In a fight against something, the fight has value, victory has none.
  In a fight for something, the fight is a loss, victory merely relief.


 
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Chris Jones  
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 More options Apr 1 2002, 4:07 pm
Newsgroups: comp.lang.lisp
From: Chris Jones <c...@theWorld.com>
Date: Mon, 1 Apr 2002 21:07:24 GMT
Local: Mon, Apr 1 2002 4:07 pm
Subject: Re: is lisp a general purpose lang?

Erik Naggum <e...@naggum.net> writes:

  * cr88192 <cr88...@hotmail.com>
  | when I was younger I was supposedly mildly dyslexic, if that has any real
  | bearing on reading speed.

    So was I.  Thosuands of hours of hard work cured it completely.

                  ^^
                  !!
                  :)


 
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cr88192  
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 More options Apr 1 2002, 4:32 pm
Newsgroups: comp.lang.lisp
From: cr88192 <cr88...@hotmail.com>
Date: Mon, 1 Apr 2002 13:33:11 -0500
Local: Mon, Apr 1 2002 1:33 pm
Subject: Re: is lisp a general purpose lang?

Chris Jones wrote:
> Erik Naggum <e...@naggum.net> writes:

>   * cr88192 <cr88...@hotmail.com>
>   | when I was younger I was supposedly mildly dyslexic, if that has any
>   | real bearing on reading speed.

cool, dudes...

I read more than I used to at least...


 
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cbbrowne  
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 More options Apr 1 2002, 4:38 pm
Newsgroups: comp.lang.lisp
From: cbbro...@acm.org
Date: 1 Apr 2002 21:38:50 GMT
Local: Mon, Apr 1 2002 4:38 pm
Subject: Re: is lisp a general purpose lang?
I'm bouncing this back over to comp.lang.lisp, as it's probably more of
"general interest" than of my interest.

On Mon, 01 Apr 2002 20:30:49 GMT, the world broke into rejoicing as
"cr88192 sydney" <cr88...@hotmail.com>  said:

> >A really interesting project to take on might be to look at OpenMCL,
> >and consider writing an IA-32 code generator for it that might allow
> >using it on IA-32 platforms.
> from what I have seen of things I think with cl one might try to build
> the underlying os from the lisp standpoint than building lisp from the
> os standpoint, I may be wrong...

Counterargument:

Getting an OS working involves a whole lot of fiddling around figuring
out how to interface with:
  a) Disk drives;
  b) Graphics cards;
  c) Keyboards;
  d) Motherboards, CPUs, memory buses

Keeping up with the regular "churn" of hardware changes means you'll be
liable to need to modify details on an annual basis, and you'll have to
very tightly specify what hardware must be used.

After all, if you wrote a nifty display manager for an nVidia RIVA last
year, you'd have found by now that the model you supported isn't
commercially available anymore.

If your goal is to continually struggle with the continual hardware
changes, then that's the nature of your project.  OS makers have been
known to "punt" and basically say "Nope; we don't support hardware other
than this tiny limited set."

For instance, you need not bother trying to use Plan 9 on a system with
an Adaptec SCSI controller; they don't support that at all.  And it
won't work with nVidia video hardware.

You'll be left with that very sort of challenge, of, on the one hand,
having to pick and choose some tiny set of compatible hardware, and, on
the other, regularly rewriting parts of the system to ensure that
there's _some_ current hardware on which your OS can run.

The alternative: Use Linux or FreeBSD as the OS kernel, and XFree86 as
the graphics "kernel."  You can thus avoid writing much if any kernel
code, and can run on the regularly-extended set of hardware that they
support.

The question is then of how deeply to start trying to have the system
"be Lisp."  

The "rather deep" choice would involve replacing Unix init with a Lisp
program that basically populates a system that from there on down looks
like Lisp, perhaps with an XFree86 process alongside to provide
graphical services.

> either case either a cl or scheme os would probably be a starting point for
> making a better os...
> also as one can probably guess I work in the create/trash/rewrite process
> (often reusing any good code...).

> are there similar projects to mine I can look at?

Certainly there are.  See the URL below for links to what largely amount
to failed projects.
--
(reverse (concatenate 'string "gro.mca@" "enworbbc"))
http://www3.sympatico.ca/cbbrowne/lisposes.html
We are Pentium of Borg.  Division is futile. You will be approximated.
(seen in someone's .signature)

 
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Erik Naggum  
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 More options Apr 1 2002, 4:43 pm
Newsgroups: comp.lang.lisp
From: Erik Naggum <e...@naggum.net>
Date: Mon, 01 Apr 2002 21:43:32 GMT
Local: Mon, Apr 1 2002 4:43 pm
Subject: Re: is lisp a general purpose lang?
* Chris Jones <c...@theWorld.com>
|                   ^^
|                   !!
|                   :)

  Typos are not caused by dyslexia.  Dyslexia is not even about typos.
  But I probably type faster than I should, because I try not to waste too
  mcuh time on trivial things.

///
--
  In a fight against something, the fight has value, victory has none.
  In a fight for something, the fight is a loss, victory merely relief.


 
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