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26 votes
Accepted

How to count the number of lines in the region?

M-= (command count-words-region). (The region does not even need to be activated, but activating it lets you see it.)
manandearth's user avatar
  • 2,128
19 votes
Accepted

How to select and delete a column of text in emacs?

C-w kills the text between point and mark; it’s the normal command you would use to kill text. C-x r k kills the rectangle between point and mark. This is the one you want to use.
db48x's user avatar
  • 18.3k
18 votes

How to select and delete a column of text in emacs?

If you select the rectangle, which in Emacs terms means make it an active rectangular region, then C-w does just what you expect. Use C-x SPC to activate a rectangular region that you want to kill. ...
Drew's user avatar
  • 77.9k
15 votes

How to unmark selection in elisp?

Ok, I found the answer almost immediately after posting question. The function name is deactivate-mark if anyone has the same question. Its described here. Updated code: (defun sandric/swiper-or-...
sandric's user avatar
  • 1,271
10 votes
Accepted

changing todo state of multiple headings at once

The Org documentation says Many commands in Org work on the region if the region is active. And indeed defining a region followed by C-c C-t acts on all headlines in that region. Note that ...
Marco Wahl's user avatar
  • 2,876
9 votes
Accepted

How to set the region (selection) programmatically in Emacs Lisp using indices?

The region is defined as the span of text between point and mark, therefore it's sufficient to adjust both to the numbers in question. The following uses point-min and point-max for that purpose: (...
wasamasa's user avatar
  • 22.2k
8 votes
Accepted

Copy text as rectangle

My crystal ball tells me you're using Emacs-24.5, which indeed had this limitation. This has been fixed in Emacs-25 where rectangle-mark-mode has been improved so you can move the cursor past the "...
Stefan's user avatar
  • 26.5k
7 votes
Accepted

Selecting (i.e., as the region) the current match in incremental search

Here's one approach: (defun isearch-exit-mark-match () "Exit isearch and mark the current match." (interactive) (isearch-exit) (push-mark isearch-other-end) (activate-mark)) (define-key ...
glucas's user avatar
  • 20.6k
7 votes

Send region to shell in another buffer

Emacs provides the function process-send-region to do this. If your buffer always has the same name, you can hard-code it in: (defun my-send (beg end) (interactive "r") (process-send-region "...
Tyler's user avatar
  • 22.4k
7 votes
Accepted

Highlight rectangle and non-rectangle selection at the same time

There’s no simple variable you can set to control this, but you can do it with some programming if you want. There is a variable called redisplay-highlight-region-function whose value is a function to ...
db48x's user avatar
  • 18.3k
6 votes
Accepted

kill-region deletes entire buffer content instead of selected text

As the comments suggest, eval-buffer manipulates the position of point, so that by the time you call kill-region, region-beginning and region-end are no longer what they were when you started. The ...
Tyler's user avatar
  • 22.4k
6 votes
Accepted

What's the most reliable way to get the start and end positions of current symbol under cursor?

The thingatpt.el API works as follows: (thing-at-point 'symbol) ;=> foo (beginning-of-thing 'symbol) ;=> 42 (end-of-thing 'symbol) ;=> 45 (bounds-of-thing-at-point 'symbol) ;=> (42 . 45) ...
wasamasa's user avatar
  • 22.2k
6 votes

Insert text or overwrite region

For Emacs setting: (delete-selection-mode t) ; delete seleted text when typing For lisp code, add following line before insert: (if (region-active-p) (delete-region (region-beginning) (region-end))...
AhLeung's user avatar
  • 1,083
6 votes
Accepted

Making a region without point

(You say "a region", not "the region", so a guess is that you do not really mean the Emacs region.) If your question is really about the Emacs region then the answer is no. Point (the cursor position)...
Drew's user avatar
  • 77.9k
6 votes
Accepted

Is there an emacs package which can mirror a region?

The documentation string for the command text-clone-create: (text-clone-create START END &optional SPREADP SYNTAX) Create a text clone of START...END at point. Text clones are chunks of ...
Tobias's user avatar
  • 33.3k
5 votes
Accepted

What is the problem with this yank function in elisp in emacs?

Why mark-end-of-sentence? I'd do it like this: (defun vim-line-yank-func() (interactive) (save-excursion (beginning-of-visual-line) (copy-region-as-kill (point) (...
Stefan's user avatar
  • 26.5k
5 votes

How to count the number of lines in the region?

Count lines does the trick, it is defined in simple.el (count-lines (point-min) (point-max))
Sebastian G.'s user avatar
5 votes

Allow C-w to kill a region only if it is selected

I think you're looking for: (setq mark-even-if-inactive nil)
Stefan's user avatar
  • 26.5k
5 votes
Accepted

How to leave mark region highlighted when switching windows

highlight-nonselected-windows is a variable defined in xdisp.c. Its default value is nil. A non-nil value means highlight region even in nonselected windows. You can customize this variable, e.g.: ...
lawlist's user avatar
  • 19.2k
5 votes
Accepted

execute all org-mode code blocks in a region?

You can use narrow-to-region, then run org-babel-execute-buffer, then widen again: (defun org-babel-execute-region (beg end &optional arg) (interactive "r") (narrow-to-region beg ...
NickD's user avatar
  • 30.6k
4 votes

Use shift-up/down keys to mark/unmark lines in dired?

If you use Dired+ then you get similar behavior out of the box. Command diredp-mark-region-files marks the files in the active region. (Similarly, diredp-unmark-region-files unmarks them.) And shift-...
Drew's user avatar
  • 77.9k
4 votes

How many bytes are in the region?

While Drew's answer will work correctly in many cases (where utf-8 is pervasive and if you don't use DOS-style EOLs), if you want to make it work reliably for "all" buffers, you could do something ...
Stefan's user avatar
  • 26.5k
4 votes
Accepted

How many bytes are in the region?

Sounds like you are asking for something like this: (defun region-bytes () (interactive) (let ((strg (if (use-region-p) (buffer-substring-no-properties (region-beginning) (...
Drew's user avatar
  • 77.9k
4 votes

Selecting (i.e., as the region) the current match in incremental search

Library Isearch+ lets you do that easily, and even toggle it on/off on the fly. Non-nil option isearchp-set-region-flag automatically sets the region (selection) around the last search target when ...
Drew's user avatar
  • 77.9k
4 votes
Accepted

Asynchronous version of shell-command-on-region?

Something in this spirit should do the trick. I tried it with espeak under Ubuntu; I guess it would work with say as well. (defun my-read-words-on-region () "Send the region to `espeak'." (...
Nsukami _'s user avatar
  • 6,531
4 votes
Accepted

How faster show multicursors on the end of all lines?

The command mc/edit-ends-of-lines adds a cursor to the end of the every line in the region. There are many ways to set the region. If you want to mark every line in a file, you can set the region to ...
Tyler's user avatar
  • 22.4k
4 votes
Accepted

(interactive "r") can't be used directly after Emacs startup

The use-region-p test should be within the interactive spec. "r" is for functions that always use the region. You probably want to use something like: (defun try-region (&optional begin end) (...
Stefan's user avatar
  • 26.5k
4 votes

Sort lines in a string

Here is one possible way to implement this using a temporary buffer: (defun sort-string (string &optional reverse) "sorts an input string, using a temporary buffer" ;;(interactive "sto be ...
jue's user avatar
  • 4,576
4 votes
Accepted

Set value of a variable to region text

This code should do what you want: (setq your-variable (buffer-substring (region-beginning) (region-end))) If you want a command, try this: (defun my-set-var-to-selection (variable beg end) "Set ...
Drew's user avatar
  • 77.9k

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