LispForum

This section of Practical Common Lisp should help you understand loop better. It is a funky macro, warping some of the intuitive rules of Lisp. When it sees keywords like collect and while , it takes special action. I think sbcl is looking at ... ((collect (subseq string n pos)) (setf n (+ pos l)))...

Traffic consulting sounds like fun. Is it a little like a game? I've worked with Common Lisp with other CL programmers. But not recently, and am not particularly interested in programming with it. If you need help with a commercial endeavor, it might be worthwhile to contact Lispworks or Allegro bec...

You should ask the clpython-devel list too. Willem Broekema likely has thought about this and could give nuanced advice.

First, let's format the code conventionally, so everyone can read it more easily. (defun string-split (split-pattern string) (let ((n 0) (l (length split-pattern))) (loop (setf pos (search split-pattern string :start2 n)) (if pos ((collect (subseq string n pos)) (setf n (+ pos l)))) (collect (subseq...

I've used Lisp commercially. It just seemed this question is very broad and needed a foundational answer. It's simple to be fast enough for real applications. I hear Ruby is slow, but it's certainly used in real applications. CLOS was at least designed with performance in mind. If you profile your c...

Also check out ediff-files and relatives like ediff-buffers. They're easy to use, and ediff-revision is good with version control.