Questions tagged [eval-expression]
The eval-expression tag has no usage guidance.
28
questions
1
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How does `eval-last-sexp` determine the expression for evaluation?
Context: Emacs 29.0.60
The ▬ and the empty lines after the script text below are point positions at which the interactively executed function eval-last-sexp echoes in the minibuffer and the *Messages* ...
- 350
1
vote
1
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54
views
Why does C-x C-e work in foo.txt but C-M-x does not?
Create a new file foo.txt and type this code in it:
(+ 1 2)
Move the cursor to the end of the line (right after the close-paren) and press C-x C-e. The expression is evaluated.
Move the cursor to ...
- 128
0
votes
2
answers
51
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goto-char support for hexadecimal input
I recently realized something weird regarding usability of goto-char using GNU Emacs:
M-x goto-char
Go to char: 0x1000
Please enter a number (OP note: didn't work)
M-x goto-char
Go to char: (* 4 ...
- 103
2
votes
1
answer
87
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Copy the result of C-x C-e instead of inserting it into buffer
Is there a builtin mechanism that copies the result of C-x C-e rather than inserting it into the buffer with the non-negative prefix. I think this would have been more useful by default.
- 912
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1
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47
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Orgmode, Export HTML in One Shell Command
When using Orgmode, we can generate/export HTML file or TXT file from ORG file, using C-c C-e(or M-x org-export), as described in https://orgmode.org/manual/The-Export-Dispatcher.html.
I wonder if ...
- 129
0
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1
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26
views
How to get the value of an evaluated function and nothing else?
In emacs, when I evaluate an elisp function, I get the value plus other stuff.
For example, if I evaluate (+ 2 2), I get this:
4 (#04, #x4, ?\C-d)
How can I setup emacs to just return 4?
- 263
0
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0
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23
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Silence eval-last-sexp message in echo area when using overlay messages
When using either eros, or lispy with lispy-eval-display-style set to overlay, I see the expression result in both an overlay and the echo area:
I'd like to only see the overlay. Is there a way to ...
1
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1
answer
53
views
Why does let binding sometimes seem to fail to override a value?
In this example, the message isn't shown, but it's still logged (message-log-max is ignored).
(let ((inhibit-message t)
(message-log-max nil))
(hs-minor-mode))
The text Showing all blocks ... ...
- 8,187
2
votes
1
answer
387
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How to enable a major + a minor mode on loading a file?
Clojure files should open in Clojure-mode. I also have Clojure files that contain color info and are used to generate my styles; they live under a /styles path. For these files, I want them to have ...
- 309
5
votes
1
answer
243
views
Showing returned values in the same buffer
When I evaluate an expression with C-x C-e, I see the result returned by that expression in the minibuffer, for a while.
Can I have that returned value written in the same buffer where the evalued ...
- 155
0
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1
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67
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eval-expression on (setq helm-debug t) does not change describe-variable output
I'm running this version of Emacs:
GNU Emacs 26.3 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.11) of 2019-09-23, modified by Debian
Installed on Ubuntu 19.10 via apt, and not built from source.
...
- 319
5
votes
3
answers
507
views
How to replace the expression with evaluation result using Elisp interpreter?
When I do bulk calculations in a scratch buffer, it is annoying to have to delete the actual expressions after they are evaluated (I want them to be deleted on evaluation).
Example:
(+ 2 2)
...
- 662
7
votes
2
answers
2k
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Quickly Evaluate Infix Math Expression?
Is there a way to highlight and quickly evaluate a simple math expression without using elisp notation? For example, we can already evaluate the elisp expression (+ 1 1) in the following text snippet ...
- 869
20
votes
5
answers
3k
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Result of arithmetic evaluation in buffer, not echo area
Windows 10, Emacs 25.1
I want to do some arithmetic operation I do this:
The result is in the echo area, but I want the result to be in cursor place in the buffer. Something like this:
How do I do ...
- 615
3
votes
1
answer
390
views
How to direct `M-:`'s value to the current buffer?
According to the Emacs manual, M-: evaluates an Emacs Lisp expression and prints the value in the echo area. How can I direct the value to the current buffer instead?
- 1,461
5
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2
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775
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Insert a string from eval-expression without the quotes
I want to use C-u M-:, then (format-time-string "%m/%d/%Y") to insert a customized date string. But it is inserted into the current buffer with double quotes.
Any trick to remove these quotes?
- 395
1
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1
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2k
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emacsclient --eval command to bring a background emacs window to front
Suppose I already opened a emacs but its in the background. So, is there an emacsclient eval option that I can type in the shell like:
emacsclient --eval "(bring-existing-emacs-window-to-front)"
To ...
7
votes
1
answer
4k
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emacs --eval of multiple functions on command line
How do I evaluate multiple functions simultaneously using emacs --eval on command line? For example I want to combine the followings in a single command:
emacs --eval "(toggle-frame-maximized)"
emacs ...
1
vote
1
answer
89
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Weird (point) and (point-max) values in IELM
When I open IELM and type in (point) or (point-max) in the interpreter, it always returns 710 (#o1306, #x2c6, ?ˆ) and 64292 (#o175444, #xfb24, ?ﬤ) respectively. If I eval these functions via eval-...
- 1,078
4
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1
answer
990
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From an external script, open file and run some simple expression whether emacs already running or not
Context / initial need (works fine)
I wrote and use a script that generates a file and uses emacsclient to edit it in an existing or new instance of emacs, in a new window.
Similar to Set up Emacs ...
2
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4
answers
2k
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How do I eval a multiple line elisp expression inside the current buffer?
I am trying to delete all HTML style comments from my current buffer.
I found a solution in "Function to delete all comments from a buffer, without moving them to kill ring", but since it is more ...
- 131
5
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0
answers
162
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Stopping pdf-tools from resetting to the beginning of an open PDF when I eval-buffer my config file
I'm using pdf-tools to read PDFs in Emacs, and am pretty happy so far. However, I've found when I modify, and then eval-buffer my configuration file, the PDFs I opened earlier with pdf-tools get put ...
- 425
5
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1
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313
views
What does "(#o4, #x4, ?\C-d)" mean here?
I use m-x eval-expression to evaluate a very simple lisp code:
( + 1 3)
And I got my result like this
What does the symbols (#o4, #x4, ?\C-d) mean in this context?
- 485
1
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1
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46
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How to make icicle-pp-eval-expression use eldoc like eval-expression?
In recent Emacs versions, eval-expression makes use of global-eldoc-mode in a quite intelligent way, using the modeline to display hints. However, icicle-pp-eval-expression, which is Icicles' variant ...
- 1,647
1
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1
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83
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both keywordp and macrop then eval from a functionp
'Hope it won't bother my using defmacros named in the style of keywords (colon-prefixed, e.g., :set-this or :get-that): it apparently tricks ELisp from otherwise requiring quoted symbols (') or ...
- 101
8
votes
2
answers
2k
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Saving open file list and buffer command history in between sessions
I've discovered desktop-save-mode which allows Emacs to be closed and when it reopens, it appears with the same files that were open before.
I want to take this a bit further and I was wondering if I ...
- 1,527
2
votes
1
answer
90
views
Input-methods in the insert eval expressions
I can activate the input method french-azerty by M-x set-input-method RET french-azerty. Then by a qwerty keyboard I can type like an azerty one. Thus typying q in the buffer gives a. But when I do M-:...
- 7,644
6
votes
2
answers
215
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Is there a variable to toggle Emacs 24.4 elisp return "noise"?
In Emacs 24.4, every time I evaluate a form in ielm or using C-x C-e it prints a lot of extraneous output that while useful, sometimes gets in the way. As an example,
(+ 1 1)
;=> 2 (#o2, #x2, ?\C-...
- 3,617