Search found 64 matches
- Tue Jan 06, 2009 1:32 pm
- Forum: Common Lisp
- Topic: Problems with allegro express and slime
- Replies: 7
- Views: 9671
Re: Problems with allegro express and slime
Hi I have an issue when trying to set up slime for allegro express on ubuntu. When it loads it says that it cannot find package clc and instead of going to the slime listener it actually opens up allegro's ide. Does anyone know what a fix for this is? Thanks in advance. clc is evil. I would uninsta...
- Tue Dec 23, 2008 10:07 am
- Forum: Common Lisp
- Topic: accept both numbers and letters
- Replies: 4
- Views: 10438
Re: accept both numbers and letters
Hey I need your help for a program in common lisp. The program has to do with polynomial manipulation. My problem is when i do simple arithmetic operations does not accept any letters e.g (p+ x 4) (defun p+ (p1 p2) (list '+ p1 p2)) (defun p+ (p1 p2) (+ p1 p2)) How can i make it in order to accept l...
- Thu Dec 18, 2008 8:39 am
- Forum: Common Lisp
- Topic: Crosscompiling Linux->Windows
- Replies: 7
- Views: 15936
Re: Crosscompiling Linux->Windows
Let's assume that I'll develop my app on my Linux box. The app makes use of some libraries. Finally, I'm happy with it and I want to deploy it on my friend's machine. My friend uses Windows. Is it possible to make a Lisp image on my Linux box and to run it on Windows, provided that the same (native...
- Wed Dec 17, 2008 2:51 pm
- Forum: Books and Resources
- Topic: Yet another Lisp related screencast
- Replies: 10
- Views: 50124
Re: Yet another Lisp related screencast
Well, defun takes a function name as its first argument, and a function name is "1. (in an environment) A symbol or a list (setf symbol) that is the name of a function in that environment. 2. A symbol or a list (setf symbol)."Paul Donnelly wrote:I still have no idea where it's described.
- Sat Dec 13, 2008 3:22 pm
- Forum: Common Lisp
- Topic: Looking for good examples of Lisp macros
- Replies: 6
- Views: 13490
Re: Looking for good examples of Lisp macros
Pattern matching is fun: (defun simp (e) (pattern-if ((? op) (? v1) (? v2)) e (setf e `(,op ,(simp v1) ,(simp v2)))) (pattern-case e ((+ 0 (? v1)) (simp v1)) ((+ (? v1) 0) (simp v1)) ((+ (? number v1) (? number v2)) (+ v1 v2)) ((- (? v1) 0) (simp v1)) ((- (? number v1) (? number v2)) (- v1 v2)) ((* ...
- Mon Dec 08, 2008 7:41 am
- Forum: Common Lisp
- Topic: Choose numbers at random
- Replies: 14
- Views: 23007
Re: Choose numbers at random
Keep in mind, that one will have to iterate over the list twice, once to get its length, and once to get the random element (apologies if you know this already). It's probably fine for your purposes, but if it seems slower than it should be, consider either not using a list or storing the list leng...
- Sun Dec 07, 2008 9:14 pm
- Forum: Common Lisp
- Topic: Choose numbers at random
- Replies: 14
- Views: 23007
Re: Choose numbers at random
I suspected someone would be along with a way to do it in one traversal, and I think I meant only that particular implementation when I referred to the necessity of iterating twice. Don't know why I would make a blanket statement like that. To clarify: I was not implying that that you stated all im...
- Sat Dec 06, 2008 11:34 am
- Forum: Common Lisp
- Topic: Choose numbers at random
- Replies: 14
- Views: 23007
Re: Choose numbers at random
Keep in mind, that one will have to iterate over the list twice, once to get its length, and once to get the random element (apologies if you know this already). It's probably fine for your purposes, but if it seems slower than it should be, consider either not using a list or storing the list leng...
- Mon Dec 01, 2008 7:59 pm
- Forum: Common Lisp
- Topic: changing argument variables
- Replies: 10
- Views: 19675
Re: changing argument variables
Dynamic variables would be one solution, should you really want to do this.
Code: Select all
(defun hello (name)
(set name 6))
=> HELLO
(defun test ()
(let ((*a* 4))
(declare (special *a*))
(hello '*a*)
*a*))
=> TEST
(test)
=> 6
- Tue Nov 25, 2008 7:49 am
- Forum: Common Lisp
- Topic: Using static typing in CL
- Replies: 5
- Views: 16122
Re: Using static typing in CL
The assertions inform the type inference, and you will usually get compile-time warnings for code that violates type declarations. Two small examples: * (defun foo (x) (if (numberp x) (car x) x)) ; in: LAMBDA NIL ; (CAR X) ; ; caught WARNING: ; Asserted type LIST conflicts with derived type (VALUES...