Questions tagged [regular-expressions]
is for patterns specifying search or replace strings. Also known as `regex` or `regexp`, the patterns describe strings to match when searching or replacing. Emacs provides extensive support for `regex` patterns in many commands. Emacs also provides an interactive expression builder for such patterns.
59
questions with no upvoted or accepted answers
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Generate a date tree from timestamps in org-mode
Since I was interested in doing my early capture-templates, I was tempted to go with this template below:
("j" "Reference type: Journal" entry (file+headline "~/Dropbox/orgfiles/gtd/ref.org" "...
- 1,759
4
votes
0
answers
153
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LaTeX-aware sentence endings?
Q: how do I define sentence endings to be LaTeX macro-aware?
I'd like backward-sentence and forward-sentence to be smarter about LaTeX macros -- particularly \footnote -- when working in LaTeX ...
Dan♦
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3
votes
0
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Is point in a regexp?
I am looking for something like thing-at-point for a regexp. For example, I want a function called regexp-at-point-p that will return the matched text if the text around the point matches the regexp ...
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3
votes
2
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314
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How to count regexp in a string and use that number in replacement?
In my LaTeX code I want to replace these strings:
\left.\left.\left.
\left.\left.
\left.
with:
\left.\left.\left. \mycommand{3}
\left.\left. \mycommand{2}
\left. \mycommand{1}
where the argument ...
- 1,189
2
votes
2
answers
47
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Colourize buffer names differently for the files located in different directories
I am working upon 2 projects that have similar structure. And sometimes occasionally modify a file in the wrong buffer.
So I desided to set different colours for the files in the different projects:
(...
- 1,019
2
votes
0
answers
87
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org-table: hide grid lines
I like how org-mode allows me to quickly create and edit tables. However, I do not like the table's appearance and I would like to modify it.
Customizing the face only lets me change foreground and ...
2
votes
1
answer
98
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Switch from Dired to Wdired rename file and directory errors when using "-F" or "--classify" ls switch regex help
If you set -F or --classify in the dired-actual-switches then it places a / at the end of directory names and * at the end of executables. When you finish renaming the files, these characters are ...
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2
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0
answers
339
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Automatic radio targets from org-mode headlines
Is there a way to have headlines in org-mode automatically behave as radio targets? Basically, I am looking for each line starting with * get turned into a radio target.
For example:
* My Headline
...
- 1,847
2
votes
0
answers
84
views
Upper/lower regexp char classes and current-case-table
I seem to have a problem with [:upper:] [:lower:] and Unicode characters.
This test fails:
(ert-deftest haskell-upper ()
(set-buffer (get-buffer-create "*haskell-mode-buffer*"))
(insert "Ż")
(...
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1
vote
1
answer
71
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adding highlight to parts of a regexp
I am pretty new to emacs so please excuse the rookie question.
So I am editing a helm chart template, and have enabled yaml-mode since most of helm uses yaml.
but I wanted to add some highlighting to ...
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1
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0
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29
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Can I limit refile targets with helm using a regular expression?
I would like to be able to use regular expressions in helm when selecting a refile target following an org-refile call. For example, if my list of targets includes
1. H1/
1. H1/P1/
1. H1/P1/C1/
1. H1/...
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1
vote
0
answers
23
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Variant of read-regexp that shows matching string candidates upon TAB
I'm looking for an extension of read-regexp, that given an additional parameter of completion candidates, shows the matching subset of these candidates in the minibuffer, when tab is pressed. Similar ...
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1
vote
1
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org-mode: specifying a hyperlink target as regex and jumping directly to match?
The documentation of a Fortran code, being done in org-mode, is intended to
be done in such a way that changing the Fortran source code to be documented
should be kept at a minimum.
There is the ...
- 11
1
vote
0
answers
121
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Ignoring specific files in recentf-mode by their exact filenames
I am having trouble to Ignoring specific files in recentf-mode.
(add-to-list 'recentf-exclude "company-statistics-cache.el")
On my end, I want to ignore them by their exact file names instead of ...
- 1,154
1
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0
answers
98
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Why correct regexp not work in query-replace-regexp?
I want to add 400 in every line where has text "finished".
Here text and regexp:
as you can see the regexp is correct
"finished":\s-*[0-9]+
Nice.
Now I use this regexp in query-replace-regexp
...
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1
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0
answers
85
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Is there is an existing parser for `.gitignore` files?
Is there is an existing parser for .gitignore files? Maybe there is some Elisp package that includes something like this?
Ideally, I would like to be able to read a .gitignore file in a given ...
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1
vote
0
answers
66
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Simple regexp inside emacs keyboard macro
Newbie question: I'm trying to record a keyboard macro with a simple regexp inside (search-backward-regexp ^[0-9]). This works well when recording the macro, but as soon as I try to execute it, the ...
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1
vote
0
answers
70
views
How can I split LaTeX inline math from preceeding or following sticked words?
I have this LaTeX code:
Lorem $math$ ipsum $math$dolor sit consecteruer adipscing elit,
sed do eiusmod tempor incidunt ut labore et dolore magna aliqua.
$math$Ut $math$ enim ad minim veniam$math$, ...
- 419
1
vote
0
answers
354
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Regular expression to match a URL
I am trying to construct a regexp for URLs (for grabbing them out quickly out of a paragraph, region, etc.). I don't need it advanced, but I am having some troubles with it. Here is my attempt, which ...
- 378
1
vote
0
answers
154
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Change regex-builder-mode hook to use <C-s>
I recently discovered emacs's "regex-builder" mode and am absolutely loving it. However, there doesn't seem to be an easy way to type in an expression in the "RE-Bulider" buffer and use that ...
- 215
1
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JavaScript regular expressions in re-builder
Is there any package that allows me to input regular expressions following the JavaScript syntax (or even Perl Compatible Reg. Exp.)?
I want to have an interactive regular expression builder (like re-...
- 315
1
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0
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49
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How to set ps-end-cut-regexp
I often use ps-print-buffer to print out files, but I don't want the first few lines of the buffer to be printed. Here's the beginning of the buffer:
# -*- mode: org; -*-
# Last updated: <2017/12/...
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1
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0
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317
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Help Aligning a Pattern with `align-regexp`
How can I use M-x align-regexp to align by
//
All ; after //
All , within [] after //
For example:
With text:
Line 1 ; B // Comment 1 [11, 22] ; Comment 2 [3333, 4]
Line 2 C // Comment 3 [3, 55] ...
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1
vote
0
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69
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using re-search-forward in yas-snippet
I'm trying to develop a new yas-snippet for expanding a common c++ log function I use a lot. The first parameter to the LOG function can be guessed by searching for existing LOG calls in the buffer. ...
- 133
1
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0
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84
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Can you use a regexp in an abbrev definition?
I want to replace words like 1st with 1^{st} and 102nd with 102^{nd} while typing in emacs. Basically I want to replace things that match this:
"\([0-9]+\)\(st\|nd\|rd\|th\)"
with this \1^{\2} as I ...
- 11.5k
1
vote
0
answers
101
views
Good way to match symmetric delimiters
I am trying to match $$ resp $ pairs to switch into latex-mode via polymode in a markdown file. $$ is the delimiter for displayed math in this case and $ for inline math.
I know that this is not a ...
- 997
1
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0
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271
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org-mode smart-quotes (probably prb with the regexps)
I have a problem with org smart-quotes. There are two cases that don't seem to be covered by the standard regexps to identify quotes, namely in the case '" and the case "'. The double quote in both ...
- 11
0
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0
answers
7
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Sorting emails using the suffix first / "Invalid back reference"
I have a list of emails that I want to sort first by suffix, second by prefix:
M-X sort-regexp-fields RET \(.*\)@\(.+\) RET \2\1
I get:
Invalid regexp "Invalid back reference
Could someone ...
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0
votes
1
answer
15
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How to use regular expressions with helm-projectile-grep?
I would like to find all strings in files matching the pattern foo_*_bar. I know that one can use \s to match empty characters. What's the pattern for zero or more characters? Could not find it by ...
- 181
0
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0
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14
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Highlighting strings in Org and Markdown mode doesn't work with *bold* or /italic/
I want to highlight strings between double quotation marks in org-mode and markdown-mode, just so they're easier to see, as in LaTeX-mode. I have the following in my .emacs:
;; Highlight strings ...
0
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0
answers
21
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How to align source code section in both Org-src-edit-code, Org-mode, and exported PDF file?
How to configure emacs such that code (in this case :which-key) is aligned in both org-edit-src-code org-mode and exported PDF?
I'm guessing this is somewhat related to tabs getting different amount ...
- 505
0
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0
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14
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"-o" like options for `elgrep`?
Sometimes I just want the matched result by regexp instead of the whole line, this seems possible via the -o option in grep
I discovered elgrep in emacs recently, which is fantastic! Any chance we can ...
- 127
0
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24
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Change foreground colour or files showing error in rsync log file
I want to colour the file names that are logged with an error when using rsync.
One such file will be as follows
2022/12/07 21:33:49 [3672] WARNING: b2-infocs/unix-like/2006-hagan-gcc.pdf failed ...
- 199
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15
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emacs multiple regex apropos
If I use apropos-command or apropos-documentation it prompts me for a word list or a regex.
In the command line, apropos allows for multiple regexes where it only shows matches that match all the ...
- 45
0
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0
answers
79
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Regexp for compilation-error-regexp-alist (react)
I try to add regexp for the compilation buffer (vite + react) for next output error:
src/pages/MainPage/MainPage.tsx:18:18 - error TS2304: Cannot find name 'SocialMedia'.
18 <...
0
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0
answers
15
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Excluding punctuation in regexp when bounds-of-thing-at-point acts on word
I am doing (bounds-of-thing-at-point 'word) to capture words in a buffer.
(let* ( (bounds (bounds-of-thing-at-point 'word))
(word (buffer-substring (car bounds) (cdr bounds)))
I then ...
- 61
0
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0
answers
18
views
Scheme to write shortened words according to certain rules
I want to modify words according no certain rules.
Here is a small example with three rules
a) Insert k for words with initial cog, col, com, con, cor, coun, cum.
(insert (replace-regexp-in-string &...
- 455
0
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0
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56
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Replacing single prefix from word
I want to omit the beginning of words starting with some (e.g. something changed to thing).
This is the way I am doing it
(insert (replace-regexp-in-string "\\<\\(some\\)" "" ...
- 455
0
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0
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43
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Extraction of reference and pdf from elfeed-entry
My elfeed is focused on finding papers and when I check out each entry, there is a PMID and DOI number at the end.
PMID:39334129 | DOI:10.1207/s12102-021-03242-8
I wanted to call a function that ...
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0
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0
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27
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Extracting numbers from elfeed entry buffer
When I am in a particular elfeed entry buffer, I want to call a function that records the article in my .bib file by extracting the following PMID and DOI numbers from my elfeed-entry buffer:
PMID:...
- 11
0
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0
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31
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image-file-name-regexp: Wrong type argument: characterp
I wanted to mark certain filenames as images and added this to my config.el:
(add-to-list 'image-file-name-regexps "/preview/")
But when I run org-toggle-inline-images now, I get the ...
- 294
0
votes
1
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132
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How to properly use a regex for font locking
I'm stuck with a specific problem, I'm writing a major-mode for a language that supports multiple assignment, meaning that:
let s = 9
let x, y, z = 1, 2, 3
var k = 11
var a, c = 4, 5
Are all valid ...
- 269
0
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0
answers
62
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Measuring cyclomatic complexity of nested s-exp
I would like to measure the Cyclomatic Complexity on a file or a region of elisp code. By counting the maximum number of nested s-exp.
- 199
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0
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108
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Highlighting all matched groups in font-lock-add-keywords rule
I'm trying to highlight variable-type in custom let-like form that looks like:
(mylet ((<variable-type> <variable-name> <variable-value>)
(...))
<some-forms>)
To do ...
0
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0
answers
89
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Command to fix internal org broken links in HTML export
I'm trying to export a bunch of org entries with numerous internal links to an external website. These links get broken during the export, but I can mostly recreate the correct URLs with some simple ...
- 187
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votes
1
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243
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How can we get input using emacs?
In order to compile my lua code i use this config
(defun lua-main-compile ()
"use lua to compile my lua code"
(interactive)
(compile "lua main.lua"))
In my lua code ...
- 51
0
votes
2
answers
108
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How can I paste a defvar into the minibuffer?
I've written a regular expression to transform Markdown links into Org Mode links and I've stored it into a variable.
(defvar markdown-link-to-org-regexp "s/\[\(.+\)\](\(.+\))/[[\2][\1]]")
...
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0
votes
0
answers
114
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Why is Emacs hanging or seeming like it isin an infinite loop?
In my current Emacs major-mode for Tecplot macro development, I have a few functions defined:
(defconst tecplot-macro-mode-syntax-table
(let ((table (make-syntax-table)))
;; ' is a string ...
0
votes
0
answers
730
views
Regular expression for finding 'href' attribute value of <a> HTML element
I need a regex pattern for finding web page links in HTML.
For example
<a href="https://www.google.com/search?q=elisp+regex+lookaround" ....></a>
I can use (?<=href=\").+?(?=\") | (?&...
- 263
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votes
0
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209
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Regex search and edit text simultaneously with multiple cursors
I'd like to search for a pattern with regex and simultaneously cut or edit all instances of that pattern.
Is there a ready-made function for this?
Atom, for example, has one such package - by ...
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