LispForum

Not an SBCL bug, just a common pitfall for users. "nreverse might either create a new sequence, modify the argument sequence, or both." http://www.lispworks.com/documentation/HyperSpec/Body/f_revers.htm Note the *might*. SBCL's warning is correct style. SBCL's behavior is conforming to the...

Here's a "fixed" version of your function. (let ((stream) (initialized 0)) (defun readsched (schedname) ;; if called the first time, open stream (if (eql initialized 0 ) (setf stream (open schedname))) ;; set the variable to 1, so stream will not be opened twice (setq initialized 1) ;; rea...

Lisp macros provide features equivalent to C++ templates and preprocessor macros.
You probably need to define a custom macro for what you want.

Yes, Racket has everything you are looking for, including support for SICP. http://racket-lang.org/ Many other good Scheme implementations are able to run SICP code, but I think they require a bit more work to get started. Here's a guide that uses MIT Scheme. http://hackerretreat.com/why-how-start-s...

I haven't read the code carefully, but this problem sounds familiar. You're probably thinking that DO has the binding semantics of DO*. In other words, all the variables created ("bound") by DO are evaluated in parallel. A change in the first variable is not visible to the others until the...

You might like EQL.

https://gitorious.org/eql/pages/Home

Building a project is part luck, with healthy doses of skill and effort. Every once in a while an odd project becomes inexplicably famous or a good project is passed by. Usually, fundamental reasons can be found. Solid design, solving a common problem, providing a novel capability, engagement with a...

So DEFUN defines a global function, even when nested in another function. So its actually easy (and sometimes encouraged) to write functions that create other functions... I'm not sure why FOO is working, but there's a good chance some DEFUN in the past brought it into existence. Use FLET or LABELS ...

See the notes in this page.

http://www.lispworks.com/documentation/ ... cp_rdt.htm

If that isn't what you want, then please describe what should happen when you reinitialize the session.

In Lisp, the first token after an opening parenthesis, '(', is generally a function or macro. In your example, you wrote "(* (x 0.5))". By default, there is no function named "x". You meant to write "(* x 0.5)". Common issue when you're starting. In Common Lisp, the var...