elisp

What is the equivalent of a python dictionary like {'a':1, 'b':2} in elisp? And again, does elisp have any map-reduce api? Association lists are the most commonly used associative containers in elisp. It is just a list of key-value cons cells like this ((key . value)) . You can use the assoc function to get a value corresponding to a key and rassoc to get a key with the required value. Elisp comes with the built-in function mapcar which does map, but AFAIK there is no good fold facility. You could emulate it using any of the looping facilities provided. However, the better solution is to use

I binded function semantic-symref to key C-c C-r like this: (global-set-key (kbd "C-c C-r") 'semantic-symref) everytime I pressed C-c C-r , it prompted: Find references for xxxxx? (y or n) How can I answer it automatically? I tryed using lambda function like this, but failed (global-set-key (kbd "C-c C-r") (lambda() (interactive) (semantic-symref "yes"))) The answer by @huitseeker is quite neat and effective. After four years, with flet and defadvice being obsolete, I wrote the following functions to answer yes automatically. Maybe it's useful for someone. (defun my/return-t (orig-fun &rest

I want to set a key in emacs to perform a shell command on the file in the buffer, and revert the buffer without prompting. The shell command is: p4 edit 'currentfilename.ext' (global-set-key [\C-E] (funcall 'revert-buffer 1 1 1)) ;; my attempt above to call revert-buffer with a non-nil ;; argument (ignoring the shell command for now) -- get an init error: ;; Error in init file: error: "Buffer does not seem to be associated with any file" Completely new to elisp. From the emacs manual , here is the definition of revert-buffer: Command: revert-buffer &optional ignore-auto noconfirm preserve

I use GDB in Emacs 24 with gdb-many-windows set to t , usually in its own frame. I like to have a separate editing frame. It looks like this (apologies for my crude ASCII diagram): +-------------+-------------+ | gdb | locals | +-------------+-------------+ | source | I/O | | | | +-------------+-------------+ | stack | breakpoints | +-------------+-------------+ This works pretty well except for one big problem. Whenever gdb needs to display a different source buffer, e.g., after up/down/step, it doesn't always show it in the "source" window. For example, if I have the same buffer open in a

I set an explicit file to customization created via the UI. It's named custom.el . Currently, I use the followed snippets to create this file if not exist. (defconst custom-file (expand-file-name "custom.el" user-emacs-directory)) (unless (file-exists-p custom-file) (shell-command (concat "touch " custom-file))) There is an ugly shell-command touch in, any other elisp functions can do this? You can use (write-region "" nil custom-file) not sure that is the ideal solution. 来源： https://stackoverflow.com/questions/14071991/how-to-create-an-empty-file-by-elisp

I often use ido for auto-completion and tramp to access remote server via ssh. My .emacs includes the following lines: (require 'tramp) (setq tramp-default-method "ssh") (ido-mode 1) (setq ido-enable-flex-matching t) (setq ido-everywhere t) I want to disable Ido completion, when i'm browsing contents of remote server. Note that variable ido-enable-tramp-completion has nothing to do with my problem. Consider line /root@site.com#1234:/var/www/file.txt . I need Ido not to deduct the part after the colon (remote file path), i don't care about the part before the colon. I use ssh, and Ido makes