As many other people interested in learning Lisp, I feel the resources available are not the best for beginners and eventually prevent many new people from learning it. Do you feel it could be created some sort of community, with a website, forum or something, that provides good (as in quality) resources/tutorials, for Lisp users, possib...
Hi! I would like to know where I should save my .sbclrc file. I tried saving it in my .sbcl folder, but it doesn't seem to be working. I'm using Windows XP with Emacs version 23. I'm trying to set up asdf-install, that is why I'm mucking around with the initialization file. Thanks for your time. ...
The function: Given a list lst return all permutations of the list's contents of exactly length k, which defaults to length of list if not provided. (defun permute (lst &optional (k (length lst))) (if (= k 1) (mapcar #'list lst) (loop for item in lst nconcing (mapcar (lambda (x) (cons item x)) (permute (remov...
I'm trying to figure out how to use the output stream of one program I start with RUN-PROGRAM so it can be used as the input of another program started with RUN-PROGRAM (i.e., the moral and perhaps literal equivalent of piping). I've tried using a number of combinations of the :INPUT, :OUTPUT and :WAIT keyword arguments, but nothing I've...
On Ubuntu I compiled sbcl 1.0.35 with threading. I can happily use sbcl from the command line and my hunchentoot website works with threading but when I logout it's gone. When I attempt to nohup sbcl nohup ./src/runtime/sbcl --core output/sbcl.core I get (SB-IMPL::SIMPLE-STREAM-PERROR "couldn't read from ~S" # 9) I've attempted va...
I have written a polynomial class along the lines described in SICP 2.5.3 (except using defclass). I would like to be able to seamlessly add and multiply polynomials and regular numbers but I can't make change-class accept a number. I tried to simplify the problem by changing class from an integer to a float: (change-class 4 'float) ...
How do I disable all warnings in sbcl? The extra output is rather annoying. ...
Creating a server-side socket will fail if I'm trying to use the same port I've used before. An address-in-use error occurs. (make-instance 'sb-bsd-sockets:inet-socket :type :stream :protocol :tcp) How do I stop this from happening? Hints and code snippets very welcome! (CL newbie here.) Thanks! ...
Python When I learned Python I installed it on windows with a nice gui installer and all .py files would automatically run in python, from the command line or explorer. I found this very intuitive and easy, because I could instantly make plain text files and run them. Lisp I'm starting to learn lisp and have decided (from reviews) th...
I am trying to install Steel Bank Common Lisp as described in this article. However, when I do this step: sh-3.2# INSTALL_ROOT=/usr/local sh install.sh I get this error: GNU Make not found. Try setting the environment variable GNUMAKE. How, exactly, do I install GNU Make and set the environment variable GNUMAKE on Mac OS X? ...
I'm trying to learn common lisp currently and I've been using sbcl (I hope that's a decent implementation choice.) Coming from ruby and irb I find the automatic moved to a debugger on every mistake a little annoying at this time. Is there a way to turn it off temporarily when I'm playing around. ...
Hello, all! I can't use auto indentation function on emacs + slime + sbcl when I define my function and so on. My .emacs file configuration is this: (setq inferior-lisp-program "D:/emacs/sbcl_1.0.37/sbcl.exe" lisp-indent-function 'common-lisp-indent-function slime-complete-symbol-function 'slime-fuzzy-complete-symbol ...
I'm having trouble getting SBCL to start under slime. I've messed things up and I don't know how to recover. This was working fine until I... Had a problem loading a package via asdf. At which point I started debugging the asdf.lisp provided with SBCL to see what was going wrong. The sole change I made was to put a (break) in which ...
Possible Duplicate: Lisp format and force-output I'm reading Paul Grahams book ANSI common lisp and on page 19 (haven't gotten far yet) there is an example that I tried in sbcl. (defun askem (string) (format t "~A" string) (read)) When I run it in REPL, I have to input something before the prompt is printed. If I save ...
I'm trying to learn Lisp now, as a supplement to my CS1 course because the class was moving too slow for me. I picked up "Practical Common Lisp," which so far has turned out to be a great book, but I'm having some trouble getting some examples to work. For instance, if I load the following file into the REPL: ;;;; Created on 2010-09-01 ...
Using SBCL, I'm writing a small server and I would like to trace the server thread, but when I use mclide/swank, I do not see any output from the server thread. ? (require 'sb-posix) NIL ? (sb-thread:make-thread (lambda () (format t "hi from the thread"))) ? When I try the same thing from sbcl directly, I see what I expect: (requi...
How do I figure out how many bytes a defclass object has in Common Lisp? ...
Newbie Common Lisp question here. Is there a way to reset the state of the environment? What I mean, is there some command that brings the REPL back to the same state it was right after it started up, that is, uninterning all variables, functions, etc. Or if that's not in the Common Lisp standard, is there some extension in SBCL (the im...
This is an easy one. (let ((x)) (if (typep x 'null) "a" "b")) generate a warning about unreachable code deletion. Presumably the compiler was smart enough to figure that it is only executed once and the type will always be null. I wouldn't normally write that code, but in this case I just don't want the code deletion notice in my outp...
I'm trying to write a number guessing game in Lisp as a time-killing project. However, when I try to load up the program using SBCL, I get the following error: debugger invoked on a SB-C::INPUT-ERROR-IN-COMPILE-FILE in thread #<THREAD "initial thread" RUNNING ...