elisp

I've been playing around with emacs lisp, and I wanted to write a little function to do a regular expression search and replace. I had a heck of a time getting the regular expression to work correctly because I didn't realize that all the special characters need to be double escaped when writing lisp code (but not when using query-replace-regexp interactively!). So for example, using query-replace-regexp interactively you can use ^\(.*\)[\t]-.*$ but when writing elisp code you need to double escape everything like so: ^\\(.*\\)[\t]-.*$ I finally found a reference to this in a Steve Yegge

This question is related to another one, Emacs :TODO indicator at left side . I recently came across a minor mode I like a lot called FixmeMode . It supports auto highlighting of TODO marks, and navigating between them. However, I think it makes more sense to recognize the "TODO" strings only in comments, rather than polluting the whole file. Is it possible? Trey Jackson Check out the library fic-mode.el , it has been verified in C++ and Emacs-Lisp. It was written specifically to answer this question. The installation is like any standard package: (require 'fic-mode) (add-hook 'c++-mode-hook

I have tried to search Google and look in the manual, but still cannot find how to get major mode of a buffer object. Can you help me with an example or a reference. Thanks only solution I could find was to query major-mode after changing the buffer and then changing back to original buffer. Is there a better way to do it? Aidan Cully Is there a problem with that? (defun buffer-mode (buffer-or-string) "Returns the major mode associated with a buffer." (with-current-buffer buffer-or-string major-mode)) with-current-buffer will restore your buffer when it returns. For current buffer: (message "

What does this do? (add-hook 'compilation-mode-hook #'my-setup-compile-mode) ...and is it different than (add-hook 'compilation-mode-hook 'my-setup-compile-mode) Trey Jackson There is no difference: (eq 'my-add #'my-add) yields t The # can be used in front of a lambda expression indicating to the byte-compiler that the following expression can be byte compiled, see the docs for Anonymous Functions . But there's nothing to compile in the case of a symbol. In general, it is used in the printed representation along with the left angle bracket (<) to indicate that the object printed is a

Frequently, I've dug into apropos and docs looking for something like the following only to give up to get back to the task at hand: (repeat-last-command) do the last C- or M- command I just executed (to be rebound to a fn key) or sometimes the related: (describe-last-function) what keystroke did I just mistakenly issue, the effect of which I'd like to add to my bag of tricks. describe-key is close, but requires knowing what I typed. Am I simply asking too much from my trusty sidekick? cms with regards to ' describe-last-function ': There's a variable last-command which is set to a symbol