LispForum

I often run into cases where I want to write "if A then B else NIL" (that is, the result matters either way.)
Should I use (IF A B NIL), (IF A B), or (WHEN A B)? What is the convention?

Every time I enter the debugger in Slime, it looks like this: EVAL: variable FORTY-TWO has no value [Condition of type SYSTEM::SIMPLE-UNBOUND-VARIABLE] ;; ... Backtrace: 0: [362] frame binding variables (~ = dynamically): | ~ SWANK::*SLDB-STEPPING-P* <--> NIL 1: [359] frame binding variables (~ = dy...

From what I understand from the license, distributing a modified binary would require me to distribute either source code or FAS files along with them, and making FAS files available isn't hiding the implementation very well.

Hmm... I read a bit and I see what I want can be very easily done with CL-PPCRE:REGEX-REPLACE-ALL. Yay for Lisp!

But... I like FORMAT :) (Just as I like printf more than iostreams.) OUT seems to have been invented because FORMAT strings can get too hairy and illegible. I don't think that would be a problem in my case, as I won't be doing anything fancy... ;; Suppose I want a message like "Monkey hits you ...

I want to format my text using FORMAT-like syntax, but with ability to call some other functions, for example (message "%a" obj) would print (descr obj), and (message "%b" obj) prints (short-descr obj). I thought of making wrappers to that functions, and using them to with the FO...

I'm a newbie writing a roguelike game in Lisp, and while I develop it in Clisp (under windows), eventually I plan on releasing it as stand-alone packages on some systems (Windows and Linux at least) - I'm not sure if I want it open source, and Clisp's license would force me to do that, so I guess I ...

Just distribute a zip archive with clisp.exe, your FAS files, and a .bat file running them (the appropriate command-line options should be in clisp's man page). As for saving executable directly - clisp (as it's licensed under GPL) prohibits distribution of modified binaries without your program's s...

Most of the time I work in Emacs with interpreter running and all my code loaded, but I wanted to make an ASDF definition file. I understand that when a multi-file project is compiled and loaded, it's done sequentially, file after file, so you have to be careful about the definitions order: - Compil...

I have a question: ASDF lets you specify dependencies for your files, but is it a problem if my files have circular dependencies?