Emacs Stack Exchange
Emacs Stack Exchange

Questions tagged [characters]

93 questions
11
votes
4 answers

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: (defun test-letter () (interactive) (if…
Name
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9
votes
4 answers

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, suppose you open GNU Emacs Reference Card…
ShreevatsaR
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8
votes
1 answer

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?
Toothrot
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8
votes
3 answers

Fast unicode symbol insertion?

Currently, I'm inserting unicode characters (mainly math symbols) using TeX input method. This is cumbersome, since, for each character, I have to do following: Switch to TeX input method pressing C-\ type latex expression like \Bbb{R} or…
Empty_Mind
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7
votes
2 answers

Idiomatic way of extending keymap for inserting unicode symbols?

I often find myself needing to insert Unicode characters that have no default binding in iso-transl-ctl-x-8-map, i.e., characters that can't be inserted using C-x 8 followed by one or more letters/punctuation characters. To add bindings to the C-x 8…
itsjeyd
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7
votes
1 answer

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 approach as process-lines: (let (lines) (while (not…
tarsius
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7
votes
3 answers

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: (setq abbrev-file-name "~/.emacs.d/abbrev_defs" …
Matthias
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6
votes
1 answer

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, in Arabic, the letters should change the form…
P. Ajrem
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5
votes
1 answer

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?
FunkyBaby
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5
votes
1 answer

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 not used to the tags used on this site, so please…
kjetil b halvorsen
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5
votes
1 answer

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 ?\( '("(" . ")") ?\[ '("[" . "]") ?\{ '("{" . "}") ?\)…
ninrod
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5
votes
2 answers

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 increment a number under the pointer! But there is a…
ReneFroger
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4
votes
3 answers

the Term “Hash Notation“ in the Elisp Manual

I'm reading GNU Emacs Lisp Reference Manual, and I see the phrase "hash notation". Two places in the document seem to have different interpretations, so I have 2 questions. 2.1 Printed Representation and Read Syntax: ...... some types have no…
shynur
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4
votes
2 answers

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. #define UNICODE_SELECTED_MODES UC_LNX, UC_OSX,…
TrentinQuarantino
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4
votes
2 answers

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 search to confine to the nearest 《》 pair, as shown below.…
Sati
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