elisp

I want to ask a second question to the user depending on the answer to the first one. (defun something (a b) (interactive (list (read-number "First num: ") (read-number "Second num: "))) (message "a is %s and b is %s" a b)) So I need a way to test the entry values : (defun something-else (a &optional b) (interactive (list (read-number "First num: ") (if (< a 2) (read-number "Second num: ")))) (message "a is %s" a)) But if: Symbol's value as variable is void: a Question : How can I use interactive in a really interactive way? (defun xtest (a &optional b) (interactive (let (a b) (setq a (read

I have not seen a really good example on the web. How can I add authentication to a request like this: (defun login-show-posts () (interactive) (let ((url-request-method "GET") (url-request-extra-headers '(("Content-Type" . "application/xml")))) (url-retrieve "http://localhost:3000/essay/1.xml" (lambda (status) (switch-to-buffer (current-buffer)) )))) if for example, the user and pass is admin:admin? I got the impression that url.el was designed mostly for interactive operations, i.e. you do a call without authorisation, the server responds with a 403 "authorization needed" (correct code?)

Is there a way to highlight a string in a text (but not ALL such strings) in a buffer where font-lock-mode is on. Let's imagine I have a buffer with SQL mode and I want to highlight a string in it. The following code does not work (set-text-properties 10 20 '(face hi-yellow)) When I call (font-lock-mode -1) it works, but all sql highlighting disappears. There must be a solution because it's possible to select a region and it will be highlighted but I can't figure out how to do it programmatically Have a look at http://www.emacswiki.org/emacs/HighlightTemporarily . Both MarkerPens and Highlight

So, I'm trying to make a generic web search function in Elisp: (defun look-up-base (url-formatter) (let (search url) (setq search(thing-at-point 'symbol)) (setq url (url-formatter search)) (browse-url url)) ) This function will just grab the word under the cursor, format the word for web search using url-formatter and then open up the search string in the web browser to perform the search. Next, I try to implement a function which will Google the word under the cursor, using the previous function as a basis. (defun google () (interactive) (look-up-base (lambda (search) (concat "http://www

I'm trying to redefine the keys used to navigate the history when inside several commands accepting regexps and offering C-p / C-n history navigation. I'd like to use other keys, in addition to C-p / C-n. For example when using occur or replace-regexp , C-p and C-n can be used to go to previous and next elements. I've tried several things but can't make it work. I think I'm missing the "big picture" here. Which mode-map do I need to modify, when and how? Everything I tried failed. P.S: Note that I've got my own minor mode with all my keymaps as adviced here. I'm assuming you just needed