Top "Lisp" questions

Lisp is a family of general purpose programming languages, influenced by the lambda calculus, and with the ability to manipulate source code as a data structure.

Why are Python and Ruby so slow, while Lisp implementations are fast?

I find that simple things like function calls and loops, and even just loops incrementing a counter take far more …

python ruby performance scheme lisp
How do I iterate through a directory in Common Lisp?

I'm using OpenMCL on Darwin, and I'd like to do something like: (loop for f in (directory "somedir") collect (some-per-file-processing …

lisp filesystems directory common-lisp
What is the closest thing to Slime for Scheme?

I do most of my development in Common Lisp, but there are some moments when I want to switch to …

emacs lisp scheme common-lisp slime
What does # mean in LISP

For example, #'functionname, is it necessary?

syntax lisp common-lisp special-characters
Getting command line arguments in Common Lisp

How can I get the command line arguments in (specifically in GNU, if there are any differences) Common Lisp?

command-line lisp common-lisp
Getting the first n elements of a list in Common Lisp?

How would I get the first n elements of a list? CL-USER> (equal (some-function 2 '(1 20 300)) '(1 20)) T I am …

list lisp common-lisp
Where to learn how to practically use Common Lisp

I am a C++ programmer trying to learn Common Lisp. I have looked at some books like Land of Lisp …

lisp common-lisp
Lisp style: setq vs. setf

Peter Norvig mentions in Paradigms of Artificial Intelligence Programming, on page 50, the trade off between specificity and consistency and when …

lisp common-lisp
Lisp on embedded platforms

Are there any open source Lisp compilers suitable for real-time embedded applications? I.e. with incremental garbage collection, customisable memory …

embedded lisp real-time
Dynamic and Lexical variables in Common Lisp

I am reading the book 'Practical Common Lisp' by Peter Seibel. In Chapter 6, "Variables" sections "Lexical Variables and Closures" and "…

lisp common-lisp lexical-scope