Here is our FAQ, updated daily, most recent items at the top.

--| 7  |------------------------------------------------------------

From Jeffrey Whitlow 
Date Jan 20
Subject error on handin

> I'm having a slight problem with the handin script to create the
>pdf. I've tried running it on my work machine, laptop and through
>the csee shell server and I get the same result so I'm not really
>sure what's going on.  Here's the error I get after running handin

(K) Error: /undefined in Todd
Operand stack:

Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--   --nostringval--   --nostringval--   false   1   %stopped_push   1862   1   3   %oparray_pop   1861   1   3   %oparray_pop   1845   1   3   %oparray_pop   1739   1   3   %oparray_pop   --nostringval--   %errorexec_pop   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--
Dictionary stack:
   --dict:1151/1684(ro)(G)--   --dict:0/20(G)--   --dict:69/200(L)--
Current allocation mode is local
Current file position is 53
GPL Ghostscript 8.64: Unrecoverable error, exit code 1

> It creates the 2print.pdf, but it's blank even though when I cat
> the file, it has contents. I've tried opening it through gs, gimp,
> acrobat, et. al. but no luck. Could it be something wrong in my
> code?

Not sure, but to simply the test, just use "bash run" to see what is 
happenning BEFORE the pdf is generated. If "bash run" crashes, 
sometimes everything else crashes after that

Enjoy!
:-)

'timm

--| 6  |------------------------------------------------------------

From Joe Krall 
date	Tue, Jan 19, 2010 at 6:36 PM
subject	Re: Homework 3/1C

> Can anyone supply the defuns from Graham's book in 2.6 and 2.7?
> (pdf-scan of the pages or typed out.)

Julaun Breyer replied:

There you go, found the entire chapter on the author?s website.
http://lib.store.yahoo.net/lib/paulgraham/acl2.txt


--| 5  |---------------------------------------------------------------

From	Joe Krall 
To	Tim Menzies <tim@menzies.us>
date	Mon, Jan 18, 2010 at 5:58 PM
subject	CS572
	
> Can you explain what is/should be in the 2print.pdf file?

The 2print.pdf file is autogenrated by the command "~timm/bin/handin".
What happens next is a little arcane but here goes:

1) "handin" expects a file in the current directory called "run" 
2) "run" expects a file called "lisp" 
3) "lisp" expects a file called "main.lisp"

(note that you can get your own run, lisp, main.lisp by downloading
my code)

"handin" calls "run" (to handle any shell stuff), then run calls
"lisp" (to handle calling sbcl), which in turn loads "main.lisp"

so 2print.pdf contains whatever is printed out by "main.lisp" and
"run".

If you look at the homework spec, you'll see some details on where
to write what. Usually, everything you write goes into "main.lisp"

Enjoy!
:-)

'timm


--| 4 |----------------------------------------------------------------

From : Julian Breyer
Date	Mon, Jan 18, 2010 at 10:30 AM
Subject	Re: homework for week2

>For some reason I can't copy the repository to my home:

>>jbreyer@shell004:~/x72$ svn co https://websvn.lcsee.wvu.edu/csx72gp11
>>Authentication realm: <https://websvn.lcsee.wvu.edu:443> csx72gp11 Subversion Repository
>>Password for 'jbreyer':
>>svn: Server sent unexpected return value (500 Internal Server Error) in response to OPTIONS request for 'https://websvn.lcsee.wvu.edu/csx72gp11'

> (the x72 directory already exists in my home dir that's why I didn't
> include it in the command). Any idea why it doesn't let me download
> the rep?

Sad to say, the repos are still missing in action. They will come
on line next week.  In the meantime, see [2], below.

Enjoy!
:-)

'timm

--| 3 |----------------------------------------------------------------
	
From Chandana Nannapaneni  	
Date  Jan 17, 7:35 pm
Subject Missing .emacs file

> I cannot find $HOME/.emacs file on the CSEE Linux machine. How can
> I get SLIME to work? I used  "ls -al" in my Home directory but still
> cannot find it.

w.t.Sica was kind enought to reply:

The .emacs file is not there by default, you will need to create
it.  When you are in the home directory, you can type emacs .emacs
And emacs will create a file .emacs You can then copy and paste the
svn: '/Users/timm' is not a working copy

--| 2 |----------------------------------------------------------------

From	jhooks 
Date	Mon, Jan 18, 2010 at 1:02 AM
Subject	Re: cs310,cs472,cs572: FAQ for Sunday Jan 17

> What all is due at the start of next class?

If you export my code to some directory (using 
svn export http://unbox.org/wisp/var/timm/10/ai/etc/proj/1/a) you will find a file
called "run" and a file called "main.lisp".

So, you must

1) Add your code to main.lisp

2) Add the line "cat main.lisp" to the start of "run"

3) Execute my handin generation code: see  ~timm/bin/handin
   Note that there may be an error message when you run ~timm/bin/handin when 
   it tries to use the svn repos- for now, we'll just ignore it.

   This produces an output file in $HOME/tmp/2print.pdf. This is what you must:
   a) print out
   b) staple

4) Hand in the stapled output.

Enjoy!
:-)

'timm

--| 1 |----------------------------------------------------------------

From	Joe Krall 
TO		Tim Menzies <tim@menzies.us>
Date	Sun, Jan 17, 2010 at 7:01 PM
Subject CS572

> We're asked to create the function rmult...I understand the question
> well, but I'm not sure how to work with using lists to make rmult
> work.  Did you want us to make a slight tweak on the rcount function?
> Should it even be done with recursion, or is it much simpler?  My
> idea is to iterate the list...grab the value, update it, and put
> it back into the list.  But I'm not sure how to do that, or if its
> the idea you had in mind.

Yes, start with rcount. 

(defun rcount (l) 
	(if (null l)
		0
		(+ (first l)
			(rcound (rest l)))))

You'll need to use "cons" to collect the result.

(cons 'a nil) ==> (a)
(cons 'a '(b c d)) ==> (a b c d)

Enjoy!
:-)

'timm