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• running shell commands with gnu clisp

  - by Paul Nathan

  I'm trying to create a "system" command for clisp that works like this (setq result (system "pwd")) ;;now result is equal to /my/path/here I have something like this: (defun system (cmd) (ext:run-program :output :stream)) But, I am not sure how to transform a stream into a string. I've reviewed the hyperspec and google more than a few times.

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• Lisp Executable

  - by Alexander Stolz

  I've just started learning Lisp and I can't figure out how to compile and link lisp code to an executable. Im using clisp and "clisp -c" produces two files .fas and .lib, what do I do next to get an exeutable?

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• Land of Lisp example question

  - by cwallenpoole

  I've read a lot of good things about Land of Lisp so I thought that I might go through it to see what there was to see. (defun tweak-text (lst caps lit) (when lst (let ((item (car lst)) (rest (cdr lst))) (cond ; If item = space, then call recursively starting with ret ; Then, prepend the space on to the result. ((eq item #\space) (cons item (tweak-text rest caps lit))) ; if the item is an exclamation point. Make sure that the ; next non-space is capitalized. ((member item '(#\! #\? #\.)) (cons item (tweak-text rest t lit))) ; if item = " then toggle whether we are in literal mode ((eq item #\") (tweak-text rest caps (not lit))) ; if literal mode, just add the item as is and continue (lit (cons item (tweak-text rest nil lit))) ; if either caps or literal mode = true capitalize it? ((or caps lit) (cons (char-upcase item) (tweak-text rest nil lit))) ; otherwise lower-case it. (t (cons (char-downcase item) (tweak-text rest nil nil))))))) (the comments are mine) (FYI -- the method signature is (list-of-symbols bool-whether-to-caps bool-whether-to-treat-literally) but the author shortened these to (lst caps lit).) But anyway, here's the question: This has (cond... (lit ...) ((or caps lit) ...)) in it. My understanding is that this would translate to if(lit){ ... } else if(caps || lit){...} in a C style syntax. Isn't the or statement redundant then? Is there ever a condition where the (or caps lit) condition will be called if caps is nil?

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• How to setup a webserver in common lisp?

  - by Serpico

  Several months ago, I was inspired by the magnificent book ANSI Common Lisp written by Paul Graham, and the statement that Lisp could be used as a secret weapon in your web development, published by the same author on his blog. Wow, that is amazing. That is something that I have been looking for long time. The author really developed a successful web applcation and sold it to Yahoo. With those encouraging images, I determined to spend some time (1 year or 2 year, who knows) on learning Common Lisp. Maybe someday I will development my web application and turn into a great Lisp expert. In fact, this is the second time for me to get to study Lisp. The first time was a couple of years ago when I was fascinated by the famous book SICP but found later Scheme was so unbelievably immature for real life application. After reading some chapters of ANSI Common Lisp, I was pretty sure that is a great book full of detailed exploration of Common Lisp. Then I began to set up a web server in Common Lisp. After all, this should be the best way if you want to learn something. Demonstrations are always better than definations. As suggested by the book Practical Common Lisp (by the way, this is also a great book), I chose to install AllegroServe on some Common Lisp implementation. Then, from somewhere else, I learned that Hunchentoot seems to be better than AllegroServe. (I don't remember where and whom this word is from. So don't argue with me.) Ironically, you know what, I never could installed the two packages on any Common Lisp implementation. More annoyingly, I even don't know why. The machine always spit up a lot of jargon and lead me into a chaos. I've tried searching the internet and have not found anything. Could anybody who has successfully installed these packages in Linux tell me how you did it? Have you run into any trouble? How did you figured out what is wrong and fixed it? The more detailed, the more helpful.

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• help with multiplying polynomials in lisp

  - by iulia

  for example:( 3x2-5x+2)(7x+1) and you simlify it like this: ((3 2)(-5 1)(2 0))((7 1)(1 0)) ((21 3)(3 2)(-35 2)(-5 1)(14 1)(2 0)) (21 3)(32 2)(9 1)(2 0) and you get this answer: 21x2+32x2+9x+2 i need this solution in lisp please help

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• Help With Lisp Code for a Binary Tree

  - by iulia

  I have (setq l2 '(1 (2 b (c 1 b))(a (1 2) d))) ( defun drumuri (l3) ( cond ( (atom l3) ( cons l3 nil)) ( t ( append ( cons ( car l3 ) nil) ( drumuri ( cadr l3)) (cons (car l3)nil) ( drumuri ( caddr l3)) )))) ( drumuri l2) and it gives me: Break 2 [4]> DRUMURI Break 2 [4]> (1 2 B 2 C 1 C B 1 A 1 2 1 NIL A D) but i need: ((1 2 B)(1 2 C 1)(1 2 C B)(1 A 1 2)(1 A D))

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• Macro and array crossing

  - by Thomas

  I am having a problem with a lisp macro. I would like to create a macro which generate a switch case according to an array. Here is the code to generate the switch-case: (defun split-elem(val) `(,(car val) ',(cdr val))) (defmacro generate-switch-case (var opts) `(case ,var ,(mapcar #'split-elem opts))) I can use it with a code like this: (generate-switch-case onevar ((a . A) (b . B))) But when I try to do something like this: (defparameter *operators* '((+ . OPERATOR-PLUS) (- . OPERATOR-MINUS) (/ . OPERATOR-DIVIDE) (= . OPERATOR-EQUAL) (* . OPERATOR-MULT))) (defmacro tokenize (data ops) (let ((sym (string->list data))) (mapcan (lambda (x) (generate-switch-case x ops)) sym))) (tokenize data *operators*) I got this error: *** - MAPCAR: A proper list must not end with OPS. But I don't understand why. When I print the type of ops I get SYMBOL I was expecting CONS, is it related? Also, for my function tokenize how many times the lambda is evaluated (or the macro expanded)?

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• What would be better? Haskell, Scheme or CLisp?

  - by Karthick

  I've been coding for a few years now, nothing too complicated. C++ is what i know best. I recently stumbled into Paul Graham's site, coding horror and now here. What do i learn to 'enlighten myself with the ways' of functional programming?

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• Setting up a non-emacs Common Lisp Dev Env for web application development?

  - by Ravi S

  I am trying to set up a Common Lisp Dev Env for web application development on my Ubuntu 10.04 LTS 64-bit box and I can't find a single decent guide that is targeted at noobs. The closest I came is with Peter Seibel's Lisp in a box but I detest Emacs with a passion and it seems to have older versions of SBCL and CLISP (which are my preferred CL implementations). I do not want to use any of the commercial implementations. I am looking for a simple setup to write some very basic CRUD apps involving possibly hunchentoot, some framework like weblocks,CL-WHO, CL-SQl, sqlite or some datastores from the nosql family like mongo and couch.. Assuming, I go with either SBCL or CLISP on Linux, what is the best tool to manage packages and libraries? ASDF? I am looking for simplicity and consistency and I don't expect to use a ton of libs...

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• Installing a condition handler in Common Lisp

  - by Paul Nathan

  The HTTP library Drakma on CLISP generates an error USOCKET:UNSUPPORTED due to a bug in Drakma+CLISP. However, it turns out that the CONTINUE restart seems to work fine. Therefore, I spent some time with CLtL and other references trying to determine how to write a restart handler. (defun http-request (url param) (handler-bind ((USOCKET:UNSUPPORTED #'(lambda (x) (invoke-restart 'continue))))) (drakma:http-request url :method :post :parameters param)) According to my best understanding, the above code should trap the error USOCKET:UNSUPPORTED. It doesn't; it seems to ignore the error binder. How do I fix this?

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• What are the differences between Bigloo and ECL?

  - by Pubby

  I've been looking to embed Lisp in some C++ code. Two options I'm interested in is Bigloo Scheme and ECL. Reading through the docs they seem to support a very similar feature set. Obviously Bigloo is Scheme and ECL is CLisp, but what other differences do they have? In particular I'm interested in the following criteria: Ease of embedding (for C++, not just C) Performance Style of coding Size Tail call support I'm targeting this question towards someone who has used both.

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• configuring slime in emacs

  - by CodeKingPlusPlus

  I am in the process of configuring slime for emacs. So far I have read about basic functionality for common lisp such as C-c C-q which invokes the command slime-close-parens-at-point which places the proper number of parens where your mouse is. Another command that seemed cool was invoked by C-c C-c and it would pass the code you are editing in a buffer to the REPL, and "compile" it. Why won't these commands work for me? Anyway, I have downloaded slime via M-x list-packages and do not seem to have this functionality (C-h w and then any of these commands tells me that these commands do note exist). So, I saw a bunch of other slime extensions such as slime-repl', 'slime-fuzzy' and 'hippie-expand-slime'. So I again usedM-x list-packages` and downloaded them. Still I did not have these commands. Here is the content of my emacs file relevant to slime: ;;;Common Lisp and Slime (add-to-list 'load-path "/home/s2s2/.emacs.d/elpa/slime-20130626.1151") (add-to-list 'load-path "/home/s2s2/.emacs.d/elpa/slime-repl-201000404") (add-to-list 'load-path "/home/s2s2/.emacs.d/elpa/hippie-expand-slime-20130226.1656") (add-to-list 'load-path "/home/s2s2/.emacs.d/elpa/slime-fuzzy-20100404") (require 'slime) (setq slime-lisp-implementations `((sbcl ("/usr/bin/sbcl")) (ecl ("/usr/bin/ecl")) (clisp ("/usr/bin/clisp" "-q -I")))) (require 'slime-repl) (require 'slime-fuzzy) (require 'hippie-expand-slime) When I execute M-x slime I get the following message in the inferior-lisp buffer where I can execute common lisp code (however, shouldn't this be the slime-repl since I required it?): STYLE-WARNING: redefining EMACS-INSPECT (#<BUILT-IN-CLASS T>) in DEFMETHOD STYLE-WARNING: Implicitly creating new generic function STREAM-READ-CHAR-WILL-HANG-P. WARNING: These Swank interfaces are unimplemented: (DISASSEMBLE-FRAME SLDB-BREAK-AT-START SLDB-BREAK-ON-RETURN) ;; Swank started at port: 46533. Then a slime-error buffer is created with the contents: Invalid protocol message: Symbol "CREATE-REPL" not found in the SWANK package. Line: 1, Column: 28, File-Position: 28 Stream: #<SB-IMPL::STRING-INPUT-STREAM {10056B9C33}> (:emacs-rex (swank:create-repl nil) "COMMON-LISP-USER" t 5) How should I modify my emacs file to give me the functionality of those commands? In my emacs file am I not loading the necessary files? Do I need to install an additional package? If you need more information let me know! All help is much appreciated!

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• What are the differences between Bigloo and ECL from an embedding standpoint? [migrated]

  - by Pubby

  I've been looking to embed Lisp in some C++ code. Two options I'm interested in is Bigloo Scheme and ECL (Common Lisp). Reading through the docs they seem to support a very similar feature set. Obviously Bigloo is Scheme and ECL is CLisp, but what other differences do they have? In particular I'm interested in the following criteria: Ease of embedding (for C++, not just C). I don't want to write a bunch of boilerplate. Performance. Bigloo is performance based and has many compiler optimization options, although I can't find anything comparable for ECL. Style of coding. This one is more for Bigloo - is it more functional than ECL? I'm targeting this question towards someone who has used both.

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• Common Lisp implementation with CFFI and thread support on Mac, Windows, and Linux?

  - by mcandre

  Goal: Install Hunchentoot and be able to run Hunchentoot as a background thread. This is what I do: Install Common Lisp. Install Quicklisp. (ql:quickload "hunchentoot") (hunchentoot:start (make-instance 'hunchentoot:acceptor :port 4242)) The last command is supposed to start Hunchentoot, then return to the interpreter for further Common Lisp forms. For CLISP, SBCL, ABCL, ECL, and CCL, I get one of two results: Hunchentoot's dependency Bordeaux Threads fails to install. hunchentoot:start hangs. The web page never loads, and never 404s.

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• Free and Open Source Software in Oracle Solaris 11.1

  - by user13277799

  Oracle Solaris 11.1 contains number of Free and Open Source packages. The following table contains important FOSS packages with their versions available in this latest Oracle Solaris release. a2ps 4.14 aalib 1.4.0 pmtools 20071116 apache-ant 1.7.1 httpd 2.2.22 mod_dtrace 0.3.1 mod_fcgid 2.3.6 tomcat-connectors 1.2.28 mod_perl 2.0.4 mod_proxy_html 3.1.1 modsecurity-apache 2.5.9 mod_wsgi 3.3 apr 1.3.9 apr-util 1.3.9 areca 7.1 autoconf 2.68 autogen 5.9 automake 1.10 automake 1.11.2 automake 1.9.6 bash 4.1 bcc 0.16.17 beanshell 2.0b4 db 5.1.25 bind 9.6-ESV-R7-P2 binutils 2.21.1 bison 2.3 bzip2 1.0.6 cdrtools 3.00 clisp 2.47 cmake 2.8.6 gnu 0.5.11 conflict 20100627 convmv 1.15 coreutils 8.5 cups 1.4.5 curl 7.21.2 cvs 1.12.13 diffutils 2.8.7 doxygen 1.7.6.1 ejabberd 2.1.8 elinks 0.11.7 emacs 23.4 otp_src R12B-5 fcgi 2.4.0 fetchmail 6.3.22 flex 2.5.35 foomatic-db 20080903 foomatic-db-engine 3.0-20080903 foomatic-filters 4.0.15 foomatic-filters-ppds 20080818 fping 2.4b2_to gawk 3.1.8 gcc 3.4.3 gcc 4.5.2 gd 2.0.35 gdb 6.8 gdbm 1.8.3 gettext 0.16.1 grep 2.10 ghostscript 9.00 git 1.7.9.2 gnu-gs-fonts-other 6.0 gnu-gs-fonts-std 6.0 gmp 4.3.2 gnupg 2.0.17 gnuplot 4.6.0 pth 2.0.7 gocr 0.48 gperf 3.0.3 gpgme 1.1.8 grails 1.0.3 graphviz 2.28.0 tar 1.26 guile 1.8.6 gutenprint 5.2.7 gzip 1.4 hal-cups-utils 0.6.19 hexedit 1.2.12 hplip 3.10.9 httping 1.4.4 hwdata 0.5.11 iftop 0.17 ilmbase 1.0.1 ImageMagick 6.3.4 iperf 2.0.4 ipmitool 1.8.11 ircii 20060725 dhcp 4.1-ESV-R7 junit 4.10 INIT 2011-02-08 lcms 1.19 less 436 lftp 4.3.1 libassuan 2.0.1 confuse 2.6 libedit 20110802-3.0 libee 0.3.2 libestr 0.1.2 libevent 1.4.14b expat 2.1.0 libidn 1.19 libksba 1.1.0 libmcrypt 2.5.8 libmemcached 0.16 libmng 1.0.10 neon 0.29.5 libnet 1.1.5 libpcap 1.1.1 librsync 0.9.7 libsigsegv 2.6 libsndfile 1.0.23 libtecla 1.6.1 libtool 2.4.2 libtorrent 0.12.2 libusbugen 0.1.8 libusb 0.1.8 libxml2 2.7.6 libxslt 1.1.26 lighttpd 1.4.23 links 1.03 logilab-astng 0.19.0 logilab-common 0.40.0 lua 5.1.4 m4 1.4.12 make 3.82 mc 4.7.5.2 meld 1.4.0 memcached 1.4.5 memcached-java 2.0.1 mercurial 2.2.1 mpc 0.9 mpfr 2.4.2 mutt 1.5.21 mysql 5.1.37 ncftp 3.2.3 net-snmp 5.4.1 nethack 3.4.3 nmap 5.51 ntp-dev 4.2.5 open-fabrics 1.5.3 openexr 1.6.1 openldap 2.4.30 openscap 0.8.1 openssl 0.9.8q openssl 1.0.0j libopenusb 1.0.1 p7zip 9.20.1 pam_pkcs11 0.6.0 patch 2.5.9 pconsole 1.0 pcre 8.21 perl 5.12.4 DBI 1.58 Net-SSLeay 1.36 pmtools 1.10 XML-Parser 2.36 XML-Simple 2.18 PHP 5.2.17 PHP 5.3.14 pinentry 0.7.6 privoxy 3.0.17 proftpd 1.3.3 psutils p17 pv 1.2.0 pwgen 2.06 pylint 0.18.0 CherryPy 3.1.2 coverage 3.5 jsonrpclib 0.1.3 ldtp 2.1.1 M2Crypto 0.21.1 Mako 0.4.1 nose 1.1.2 ply 3.1 pybonjour 1.1.1 pycups 1.9.46 pycurl 7.19.0 lxml 2.3.3 pyOpenSSL 0.11 Python 2.6.8 Python 2.7.3 setuptools 0.6 quagga 0.99.19 quilt 0.60 rdiff-backup 1.3.3 readline 5.2 rpm2cpio 0.5.11 rsync 3.0.8 rsyslog 6.2.0 rtorrent 0.8.2 ruby 1.8.7 samba 3.6.6 sane-backends 1.0.19 sane-frontends 1.0.14 screen 4.0.3 sed 4.2.1 sendmail 8.14.5 slang 2.2.4 slib 3b1 slrn 0.9.9 snort 2.8.4.1 sox 14.3.2 spawn-fcgi 1.6.3 squid 3.1.18 stdcxx 4.2.1 subversion 1.7.5 sudo 1.8.4.5 swig 1.3.35 expect 5.45 tcl 8.5.9 tk 8.5.9 tls 1.6 tcpdump 4.1.1 tcsh 6.17.00 texinfo 4.7 tidy 1.0.0 timezone apache-tomcat 6.0.35 top 3.8beta1 trousers 0.3.6 unixODBC 2.3.0 unrar 4.1.4 unzip 6.0 vim 7.3 visual-panels wget 1.12 which 2.16 wireshark 1.8.2 wxGTK 2.8.12 xorriso 0.6.0 xz 5.0.1 zip 3.0 zlib 1.2.3 zsh 4.3.17

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• Personal Project - Next practical language/tech to learn

  - by Paul Nathan

  I'm working on a personal project doing some finance analysis. It's a totally new field for me, and I'm really having fun with it so far, plus working in the high-level language arena is a great break from my embedded systems daytime work. I have a MySQL backend on a non-local server with a pile of stock data. My task now is to do some analysis of the stocks and produce something approximating a useful result. There are a couple technical difficulties. (1) I have a lot of records. To be precise, I believe I'm near 100K records right now, and this number grows by 6.1K each weekday. I need to create a way to rummage through these fields and do data analysis - based on a given computation, go look at this other set. Fine and dandy, nothing too outre. But this means I could really use a straightforward API for talking to MySQL. (2) Ideally, it runs on OS X 10.4.11. No Windows/Linux machine at home. (3) I can use PHP, C++, Perl, etc. I even have an R installation. I'm pretty flexible with stuff, so long as it runs on OS X. (Lots of options here, pick water, H20, or dihydrogen monoxide ;-) ) (4)Lack of hassle. While I like clever and fun ways of doing things, I'm trying to get some analysis done, not spend ten hours doing installation work and scratching my head figuring out a theoretical syntax question needed to spout out "hello world". What's the question? I'd like to dig into something different than my usual PHP/C++/C toolset. I'm looking for recommendations for languages/technologies that will assist me and meet the above requirements. In particular, I've heard a lot of buzz about F# and Python on SO. I've used CLISP for small problems before, and kinda liked it. I'm seeking opinions about those in particular. edit:since I rent the DB server and have a limited amount of CPU time online, I'm trying to do the analysis on a local machine.

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