elisp

I have always been bugged by the fact that when exiting with revive.el and windows.el enabled it opens a file and writes to it called .revive and .windows. These are saved so it goes in the recent files list. Is there anyway to make it ignore these files or any other files I desire. Victor Deryagin A way to make recentf ignore some files is to add appropriate regexps to recentf-exclude list: (add-to-list 'recentf-exclude "\\.windows\\'") (add-to-list 'recentf-exclude "\\.revive\\'") This will prevent any future entries of the above from being added to the recentf list. You need to delete the

(let ((a 1) (b (+ a 1))) (message a)) This throws the error Debugger entered--Lisp error: (void-variable a) What's the canonical way to do this? zev The canonical way is to use let* (also note that I added a %s format string to your message form): (let* ((a 1) (b (+ a 1))) (message "%s" a)) The let* function allows you to reference other variables that have previously been defined. 来源： https://stackoverflow.com/questions/6794691/in-elisps-let-how-do-you-reference-a-variable-bound-in-the-same-let-while-bind

I'm familiar with Emacs Lisp, but not Common (or any other) Lisp. Some Lisp programmers suggest (e.g. A basic function for emacs ) that it's good to use #' in front of function arguments in Lisp code. For example: (mapc #'my-fun '(1 2 3)) In Emacs Lisp, I believe that this is equivalent to (mapc 'my-fun '(1 2 3)) From the elisp manual, section 12.7. The read syntax #' is a short-hand for using function . The following forms are all equivalent: (lambda (x) (* x x)) (function (lambda (x) (* x x))) #'(lambda (x) (* x x)) and the help for function function is a special form in eval.c . (function

I've got a string like "foo%20bar" and I want "foo bar" out of it. I know there's got to be a built-in function to decode a URL-encoded string (query string) in Emacs Lisp, but for the life of me I can't find it today, either in my lisp/ folder or with google. Anybody remember what it's called? org-link-unescape does the job for very simple cases ... w3m-url-decode-string is better, but it isn't built in and the version I have locally isn't working with Emacs 23. url-unhex-string In my case I needed to do this interactively. The previous answers gave me the right functions to call, then it was

Currently, I have my global TODO list shown as follows thanks to erikstokes : (org-agenda-prefix-format " %i %?-12(concat \"[ \"(org-format-outline-path (list (nth 1 (org-get-outline-path)))) \" ]\") "))) which outputs: for org layout: However, as you can see, for Task A, even though there is nothing in the project, it still shows up on the list. describe-variable for org-agenda-prefix-format says : If the first character after `%' is a question mark, the entire field will only be included if the corresponding value applies to the current entry. This is useful for fields which should have