lisp

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: The sexp in question is (((lambda (b) (lambda (a) (+ b a))) 3) 5) which, to me, looks like it should evaluate to 8 , and in other lisps (e.g. Racket) it does, but in elisp it instead throws this error: Debugger entered--Lisp error: (invalid-function ((lambda (b) (lambda (a) (+ b a))) 3)) It appears to be telling me that ((lambda (b) (lambda (a) (+ b a))) 3) Is not a valid function. This seems wrong, because when I evaluate that expression I get (lambda (a) (+ b a)) which looks like a valid function to me. Does anyone have any idea why this

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to setup the slime mode in emacs for using common lisp. When I attemp to start slime with M-x slime I get an error message saying: process inferior-lisp not running . So, I checked the value of the variable inferior-lisp-program which turned out to be "/opt/sbcl/bin/sbcl" . sbcl is an acronym for an implementation of common lisp known as steel bank common lisp. Note that this variable is defined in file slime.el . As I do not have sbcl (the previous directory does not even exist on my machine) installed on my machine (which runs

In GNU Emacs, I want to run a program, figlet, on the currently selected text. I then want to comment the region which is produced. I have figured out how to do it using the standard Emacs commands: set mark with C-<space> at the start of the word move cursor to the end of the word C-u M-x shell-command-on-region RET figlet RET M-x comment-region RET However, I have failed to work out how to write an Emacs lisp program to do all this. Here is my attempt: (defun figlet-region () (interactive) (push-mark) (shell-command-on-region "figlet") (comment-region (mark) (point)) (pop-mark) ) (global-set

After reading a lot of documentation regarding Lisp eval-when operator I still can't understand its uses, I know with this operator I can control the evaluation time of my expressions but I can't figure out any example where this may be applicable ? Best Regards, utxeee. Compilation of a Lisp file Take for example the compilation of a Lisp file. The Lisp compiler processes the top-level forms. These can be arbitrary Lisp forms, DEFUNs, DEFMACROS, DEFCLASS, function calls,... The whole story how the file compiler works is too complex to explain here, but a few things: the file compiler

So I was working in emacs and the suddenly, the slime-repl sbcl says text is read only. Well that's great because now I can't type anything into it. How do I fix? devon "Buffer is read-only" can be cured by C-x C-q but as Drew & phils said, "Text is read-only" is very different -- it means some part of the buffer has a read-only property. Try moving away from the read-only part, e.g., to the end of the buffer. Emacs Lisp Manual > elisp.info > Text > Text Properties > Special Properties Since changing properties counts as modifying the buffer, it is not possible to remove a `read-only' property

I have a list of things (I'll call it L), an index(N) and a new thing(NEW). If I want to replace the thing in L at N with NEW, what is the best way to do this? Should I get the sublist up to N and from N to the end of the list and then glue together a new list from the first part, NEW, and the last part using list? Or is there a better way to do this? l0st3d (setf (nth N L) NEW) should do the trick. hazzen How often are you going to do this; if you really want an array, you should use an array . Otherwise, yes, a function that makes a new list consisting of a copy of the first N elements, the