Questions tagged [characters]

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10
votes
4answers
2k views

How to determine if the current character is a letter

How I can determine if the current character is a letter (an alphabetic character) (i.e., belongs to the syntax class [:alpha:] in regexp notions). I would like to write a simple function like below: ...
8
votes
4answers
2k views

Showing bytes as hexadecimal escapes rather than octal escapes

Short version: Can I make Emacs show \ff or \xff instead of \377? Long version: Suppose you open a file that is not entirely text and has some binary data (say a PostScript or PDF file). For example, ...
7
votes
3answers
621 views

Translate ae to ä on non-German keyboard

If for some reason I am stuck to a keyboard with English layout and I often have to enter text in German - can emacs translate ae to ä (or ue to ü) for me? I do have a not-working solution like this: ...
7
votes
1answer
1k views

Insert character by its Unicode name

From the documentation of insert-char, I cannot see why (insert-char "GREEK SMALL LETTER EPSILON") doesn't work. Is there a non-interactive way to insert a character given its Unicode name?
7
votes
1answer
197 views

Is there a more efficient alternative to search-forward when searching for a single character?

I need to split the contents of a buffer into a list of strings. The null character is used to separate the items. It the items were separated by newline characters, then I could use the same ...
6
votes
1answer
801 views

Arabic in emacs shown as separate letters

I am trying to work with Arabic and English texts in the same buffer. They don't have to be in the same paragraphs. A text like والإكرام و نوافج is shown as separate letters. Contrary to English, ...
5
votes
2answers
1k views

Incrementing characters in Emacs, next to numbers?

You can place a pointer on a number, like 1, and increment it to 2. There are many alternatives on this. See also the Emacs Wiki: https://www.emacswiki.org/emacs/IncrementNumber 7 alternatives to ...
4
votes
2answers
435 views

How can I programmatically get the canonical unicode name of a character?

I'm attempting to get the name of the character (or multibyte character) at point, and just the name, programmatically. describe-char tells me what the character's name is, along with a bunch of ...
4
votes
1answer
940 views

Test char at point

I want to test if char at point is, let's say, "{" I found: (string= "{" (buffer-substring-no-properties (point) (+ 1 (point)))) and: (string-match-p "{" (what-cursor-position)) both working. ...
4
votes
2answers
1k views

Non-greedy regex not working

I can't seem to get the non-greedy regex to work. Sample String: ABCD,E《F》、《GH》、《XYIJ》、《KL》、《MN》。 Regex Code: 《.+?IJ》 Search Result: Because .+? is a non-greedy input, I was expecting the ...
4
votes
1answer
358 views

Typing composite characters (e.g. diacritics) in emacs

When running GNU Emacs as a GUI (under Ubuntu), I can't type composite characters with a Spanish keyboard. For example, to type character á in a Spanish keyboard you first type the ´ key followed by ...
4
votes
1answer
641 views

What are the ?\(, ?\[, ?\{ symbols in emacs lisp?

I've came across this comment in an evil-surround issue, which stated this code: ;; use non-spaced pairs when surrounding with an opening brace (evil-add-to-alist 'evil-surround-pairs-alist ?\( '("(...
4
votes
2answers
593 views

Unicode input from keyboard (QMK) to Emacs

I have setup my QMK-enabled keyboard to output Unicode characters. In short, that was adding UNICODE_ENABLE = yes line to the rules.mk file and adding the following two lines to the config.h file. #...
4
votes
1answer
529 views

how can I fix incorrect character width?

Emacs is telling me that a certain character only takes up 1 column, even though it clearly takes up two? Is there a way I can fix this? The reason is that I'm doing some calculations in order to "...
4
votes
0answers
219 views

How to make Emacs not intercept Command-Ctrl-Space, used for Special Characters on macOS?

On macOS the CommandCtrlSpace shortcut opens an Emoji picker which can be expanded into a Special Characters picker. But when I type this shortcut on Emacs in order to input a character, instead of ...
3
votes
1answer
66 views

Zero width space shows as underscore

Typing a zero-width space in TERMINAL emacs shows an underscore-ish character. How to make it showing nothing?
3
votes
1answer
1k views

How do you type a space character in Spacemacs?

I was researching editors and I ended up stumbling upon Spacemacs and the fact that it uses the spacebar instead of traditional modifier keys. The documentation claims that this lowers the user's risk ...
3
votes
2answers
618 views

Make Emacs short keys work in different language

I have to often switch the OS keyboard language between Latin an Cyrillic. When the keyboard is Cyrillic the short keys don't work because they are not recognized. For example a Latin command of C-x-c ...
3
votes
1answer
3k views

How can I ask emacs to show me (visually) invisible characters like CR LF?

The title says it all: I want emacs to show (all, or only some, like CR LF) invisible characters in my buffer? (If it matters: I am using the latest emacs (25) on the latest debian testing) (I am ...
3
votes
2answers
2k views

How to change the background/foreground color of some characters/words?

I know by M-x set-background-color or M-x set-foreground-color one can change the background/foreground of the the entire buffer. Of course this color change only persists in the current session. In ...
2
votes
2answers
95 views

How can I use a char as a counter?

I have this LaTeX code: \begin{enumerate}[a] \affiliation{...} \affiliation{...} \affiliation{...} ... \affiliation{...} \end{enumerate} and, using a script written in Emacs Lisp, I want to ...
2
votes
2answers
208 views

Accessing the character in the line below

I am writing an Emacs Lisp function which needs to know the character directly under point in the line below, returning nil when no such character exists. I thus defined the function char-below, which ...
2
votes
1answer
41 views

Finding English Letters in a multilingual document

I have a document mainly Persian with English/French/German characters here and there. I want to append a command before Latin word(s) and a } at the end. Do you think it could be done in emacs? ...
2
votes
1answer
68 views

How to replace a digit by a letter?

I want to replace some digits by letters such that 1 ---> a 2 ---> b ... In emacs I have tried the following replacement: M-x query-replace-regexp RET \([0-9]+\) RET \,(string (+ ?a \#1)) RET ...
2
votes
1answer
71 views

How should one interpret the printed representation of integers in Emacs Lisp?

I'm getting to grips with Emacs Lisp in GNU Emacs 25.3.2. While trying to understand the printed representation of integers I got confused by the following echo area output produced by C-x C-e: 10 -&...
2
votes
3answers
119 views

What does “^[” represent?

I wrote a terminal output to a plain text file and opened it in Emacs, and I see "^[" here and there. I'd like to change it to tabs in terminal before writing its output to the file, but I don't know ...
2
votes
1answer
120 views

Hide non-breaking spaces in org-mode, but show them in code blocks

Default Emacs settings show non-breaking spaces as a kind of underscore. This is very useful because these otherwise invisible characters would break code execution in many programming languages, and ...
2
votes
3answers
1k views

how to teach emacs that `'` (dead acute) + c = ç?

I've set up my keyboard layout in arch with localectl set-x11-keymap us pc104 intl By default, in this layout, the ' is a dead character. It is called a dead acute. In Portuguese, we are used to ...
2
votes
0answers
129 views

Composition of the Arabic letters Lam and Alef in Emacs

When I insert the character ل (the Arabic letter Lam) followed by ا (the Arabic letter Alef) the result would be لا. In other text editors when I have the word لا I can mark (select) each of its ...
1
vote
1answer
254 views

Replace certain multibyte characters

In my markdown file (coming from a Windows computer on which I have no control), I have several multi-byte characters. Some text xx Some text yy Some text In emacs, they are displayed as \221 and \...
1
vote
1answer
64 views

unescaped character literals detection error

When I reload my init file I get an error (or warning) saying unescaped character literals `?(', `?)', `?[', `?]' detected! What does this error (warning) mean and how can one fix it?
1
vote
1answer
55 views

Recursion in char_charset?

I am looking at the C code for Emacs as of Emacs 26.1, file charset.c , defun char-charset (around line 2040), and file charset.h, macro CHAR_CHARSET (around line 380). I don't understand how in the ...
1
vote
1answer
152 views

shell-command and C-h

If I create a string from the output of a shell command, using shell-command-to-string, I sometimes see ^H characters in the string, when I guess those characters were supposed to result in ...
1
vote
1answer
24 views

Number value echoed from evaluation

What does the (#o3, #x3, ?\C-c) output in the echo area (next to the 3) represent? Here I've simply evaluated (+ 1 2)
1
vote
1answer
53 views

forward-word and non-letter “words”

Using forward-word with this line: foo *** *** bar, I want to have the folowing behavior: foo| ***| ***| bar|, Not: foo| *** *** bar|, So, if between spaces there are only non-letter symbols, ...
1
vote
1answer
748 views

How to understand paragraph-start variable regex

Problem When i evaluate the paragraph-start variable in the major mode lisp-mode, it has the following value "^L\\|[ ]*$" In emacs the ^L is displayed in red color so I'm not sure if there is ...
1
vote
1answer
39 views

set-register register-separator “\n\n”)

Upon reading GNU Emacs Manual #rectangle register When you are collecting text using append-to-register and prepend-to-register, you may want to separate individual collected pieces using a ...
1
vote
1answer
131 views

Display devanagari characters

Running Emacs 25 on Kubuntu 17.10. I am able to enter text in devanagari script but it does not dispaly correctly in the editor. For instance, the text entered as: क का कि की कु कू के कै को कौ कं कः...
1
vote
2answers
735 views

emacs counts German umlaut as two columns

I have been writing a document with a not monospaced font, because it is not code but only text. This is a document written in reStructuredText, with the file ending .rst and when it is opened in ...
1
vote
1answer
37 views

How to print escaped characters with princ

When Emacs shows an integer value in the minibuffer, or as an output to IELM, it shows three representations of it -- octal, hex and as character: ELISP> 10 10 (#o12, #xa, ?\C-j) This is really ...
1
vote
0answers
133 views

How to change comments characters in assembly mode

I am editing .s files whit an assembly-to-binary translator that does not accept ; as a comment delimiter but accept C like comments (namely // and /* ... */). I tried to modify comment-start ...
1
vote
0answers
70 views

Set font family for comments

In coq mode I have ligatures being used: instead of "fun", it shows λ in the programming code. But in the comments lambda transformed into a character I can't even copy, so I'll attach a screenshot: ...
1
vote
1answer
140 views

Getting auto-complete to work correctly in scribble-mode

I've been using Neil Van Dyke's scribble-mode for editing Scribble code in Emacs. I'm also using auto-complete and ac-capf to get better completion in scribble-mode. However, I've been running into a ...
1
vote
0answers
52 views

extra e character is inserted before every character

I have a problem every so often where I accidentally hit a key combination (don't know what it is) and I get into a state where the letter e (sometimes it is another letter IIRC) is inserted before ...
0
votes
2answers
66 views

How to replace first 100 digits with letters?

I want to replace the first 104 digits as it follows: 1 --> a ... 26 --> z 27 --> aa ... 52 --> az 53 --> ba ... 104 --> bz I have tried as it follows: (...
0
votes
1answer
452 views

insert a single character

My goal Write code in my init.el file so that from now on, M-v will just print the BELL character (character number 27 in hexadecimal) instead of scrolling down as it does by default. My failed ...
0
votes
2answers
157 views

How to prevent unwanted characters such as`[OB` and `^[OA` and hanging at bottom or top point on scrolling?

I am using emacs under iTerm2 on Mac. I am using mouse to scroll up and down. Please not that I haven't face with the issue when I remotely connected into a linux machine, which has exactly same emacs ...
0
votes
2answers
80 views

Symbol's value as variable is void: ‘yes-or-no-p

I have the following lines in my config file: (fset 'yes-or-no-p 'y-or-n-p) (setq confirm-kill-emacs ‘yes-or-no-p) The latter line is what's throwing the error. I would like to be able to use 'y-or-...
0
votes
1answer
71 views

How do I display dashs as minus signs outside comments and strings?

In source code, I'd like to display “-” as “−”. In the font I use, the dash is very short and doesn't match the “+” at all. This is only to improve visual appearance. The character in the file must ...
0
votes
1answer
60 views

Display Δ in the *Shell Command Output* Buffer

I have a shell command I'm running from Emacs that has a Δ character in its output. How can I configure the *Shell Command Output* buffer to display UTF-8 by default? edit: There could also be ...