Questions tagged [strings]
{strings} are sequences of characters (most commonly literal constants). However TeX doesn't have the same concept of strings as other languages, so for questions regarding text in general this tag does not apply. Usually when dealing with {strings} one also uses the primitive {pdfstrcmp} or dedicated packages, such as {xstring} or {expl3}'s string module (l3str).
478
questions
3
votes
2
answers
79
views
ConTeXt: Escape hash symbols for use with lpeg replacer
Background
Looking to perform a text substitution on arbitrary strings. In the code snippet, the value #a.m. #p.m. value comes from a document. More specifically, the input is an XML document ...
- 11.6k
4
votes
5
answers
382
views
Macro to remove all non-numeric characters from its argument
In a custom class I defined a custom command to typeset a telephone number,
\newcommand{\phone}[1]{\def\@phone{#1}}
I use this \@phone macro inside my class when I want to replace with the value from ...
- 1,181
0
votes
1
answer
22
views
How do I replace a specific string with its bold version?
I want to bold my own name in the publication section of my CV.
I have tried:
\usepackage{xstring}
\newcommand{\highlightname}[1]{
\StrSubstitute{#1}{My Name}{\textbf{My Name}}
}
\begin{enumerate}
...
- 143
0
votes
0
answers
49
views
Universally usable macro definitions with literal UTF-8 content
Since UTF-8 is the default input encoding, it should be straigthforward to use literal Unicode characters
in macro arguments,e.g.
\newcommand*{\regards}{Grüße}
This fails, if the macro is defined in ...
- 159
3
votes
1
answer
84
views
Can't check if a string(token list) type macro in a sequence in LaTeX3?
This is my first time on TeX Stack Exchange, so please forgive me if I unintentionally offend anyone.
Compile Environment(using pdflatex to compile):
WSL: x86_64 Linux 5.15.133.1-microsoft-standard-...
- 33
1
vote
1
answer
109
views
To make "\" to category 12, why should convert it to category 13 in TeX？
Exercise 7.5 on page 40 of The TeXbook asks to make \ to category 12. The answer of this question is
{\catcode‘/=0 \catcode‘\\=13 /message{/string\}}
Why should assign the \ to 13 not 12?
The ...
- 1,801
5
votes
4
answers
583
views
Command to insert a string between each character in another string
I would like a command \initials that takes a string and inserts another string (e.g., ~) between each character. So \initials{GRRM} would be typeset as G~R~R~M.
- 1,386
2
votes
1
answer
280
views
Convert Date string format from dd-mm-yyyy to dd.mm.yyyy with some feature
I need to convert a date from one format to another. This is a very simple problem that has already been solved in the topic Latex convert Date string format from mm/dd/yyyyy to dd/MM/yyyy. However, ...
- 119
1
vote
3
answers
74
views
Branch over number of characters of an argument provided to a macro
I currently have the following command:
\newcommand*{\setfontshape}[1]{\@ifnotmtarg{#1}{\csname#1shape\endcsname}}
that helps me produce the command: \scshape from text sc.
I would like to modify my ...
- 4,703
3
votes
3
answers
455
views
Why are my newlines turned into \Omega?
If I use ^^J or \iow_newline:, it prints a \Omega instead of a newline. Any idea what I got wrong?
\documentclass{article}
\ExplSyntaxOn
\NewDocumentCommand{\printTwiceWithNewline}{v}{
\...
- 7,803
1
vote
1
answer
95
views
ConTeXt: Pass text value into text background graphic
Background
Looking to draw dynamically-derived text as a "legend" for a paragraph that spans multiple pages.
Version: 2023.07.18 22:07
Problem
The text doesn't appear where desired.
Code
...
- 11.6k
1
vote
1
answer
90
views
Testing if a string is a part of a csv list of strings
I use the xsim package with tags for my exercises. These tags are a CSV lists of strings.
I have a tag called year (year={2020-2021,2017-2018}, for instance) which contains school years. I can ...
- 1,291
2
votes
0
answers
31
views
xstring testing: help needed for testing chords typeset with leadsheets package
For a personal songbook project I use the leadsheets package. Later on, I want to automatically typeset guitar chord diagrams based on the chords of a song, even if the song is transposed via the ...
- 53
1
vote
2
answers
101
views
Expandable macro that extracts the first characters of many words for UTF-8/cyrillic or UTF-8/ASCII string without additional packages
There was a problem to slightly change the macro described in Expandable macro that extracts the first character of UTF-8/cyrillic string without additional packages for the argument which may contain ...
- 119
0
votes
1
answer
79
views
Remove extra spaces and curly braces latex code in string Python (normalize string in python)
I want to normalize string in python. For example, I have a LaTeX code
str='{{{ \\dfrac{{3}}{{4}} + \\sqrt{3} }}}'
I want to get the string
str='{\\dfrac{3}{4}+\\sqrt{3}}'
Remove extra ...
- 47
3
votes
2
answers
189
views
LaTeX3 how to use content/value of predefined command in token list/string?
First of all, I guess that will be a very easy answer for people who are experienced in expl3. But for me its new and I'm very willing to learn that stuff to understand Latex3 better. So I hope for ...
- 1,483
3
votes
3
answers
138
views
How to automatically wrap lines in scriptio continua
How to wrap lines automatically for scriptio continua (contexts in which there are no devices whereby to separate distinct words)? I am using XeLaTeX.
For example, the following code does not produce ...
- 483
0
votes
0
answers
42
views
Wrapping long url hyperlinks that contain no spaces within a table [duplicate]
For some reason, I have been unable to wrap an href within a table using the solutions presented here: Wrapping long lines that contain no spaces
And, here:
Forcing linebreaks in \url
Any suggestions ...
- 317
1
vote
0
answers
51
views
Compare Token List result to a string
I have a command that (beyond my control) evaluate into a token list, and I want to compare it to a given string, I tried to follow this answer and create a variant on \tl_if_eq:
\ExplSyntaxOn
\...
- 11
0
votes
1
answer
22
views
the string position in code doesn't correspond with the position in the output pdf
I have a code like below, and I want to insert the string "22222222222222222222222222"
at the place above \date{today}
as is in the code, but it appears on the first page and today is on the ...
- 1,920
0
votes
0
answers
98
views
Is there a way to remove specific characters from argument of a macro?
Suppose we have a macro saying,
\NewDocumentCommand\foo{m}{#1}
When it eats an argument, I want it to print whatever is in the argument without specific characters.
For instance, I want to remove ...
- 463
0
votes
1
answer
36
views
Argument not returned for some options
When using one option of a \str_case for the case noseperator the returned string is empty. I do not understand why...
\documentclass{article}
\RequirePackage{booktabs}
\usepackage[mode=text, reset-...
- 1,475
2
votes
1
answer
94
views
Assigning commands to str does not work
I want to assign the values of other commands (like \nobreakspace) to a string to be able to use these later.
Assigning does not seem to work as it is taking the commands literaly...
\documentclass{...
- 1,475
1
vote
1
answer
38
views
Copying one string into another does not work expl3
I try to create a command that shows the euro value. I want it to show different types (0 decimal digits, 2 decimal digits or all decimal digits) and have this set by a \seteurformat command.
That ...
- 1,475
2
votes
2
answers
120
views
How to store data from a text file into Tikz variable?
I am trying to pass values of variables I am using in my Tikz plot using the text file. I am not sure how to convert data from string to character. Here, the automaton.txt stores some array values (...
- 47
2
votes
1
answer
54
views
Getting a substring from a string which is stored inside a variable in LaTeX
I currently have the following problem for which I couldn't find a solution for. It's about getting a substring from a string variable...
I've a nested list of values:
\ExplSyntaxOn
\...
- 97
2
votes
1
answer
129
views
How to make this sliding window?
Book: Handbook of Exact String Matching Algorithms
Update:
% compiler: xelatex
\documentclass{report}
\usepackage[top=2cm, bottom=2cm, left=2.5cm, right=2cm]{geometry}
\usepackage[utf8]{inputenc}
\...
- 23
0
votes
2
answers
39
views
Concatenating macro parameter and string adds unwanted space [closed]
I wanted do define a simple macro like the following:
\newcommand{\testcommand}[1]{
\includegraphics[]{pictures/#1.jpeg}
}
But this does not work because it adds a space between the argument #1 ...
- 35
1
vote
2
answers
96
views
Creating "static" arguments in a string
Is there a trick to integrate arguments "statically" in a given string, to use this string in another command that will then process the argument ?
Something like :
\edef\mystring{Hello #1 !...
3
votes
2
answers
424
views
How to typeset a regular expression string in a LaTeX table?
I want to typeset a table with regular expressions in one column of the table. The data that I want to put in the table is below:
I have tried with following code:
\newcolumntype{e}{>{\hsize=0.02\...
- 531
4
votes
1
answer
122
views
Header which contains list of all elements on page
I want to define a ''question" environment which interacts with the header of my latex page.
The question environment will modify the header of the page which the command is found on. Ideally, ...
0
votes
1
answer
141
views
How to auto replace string pattern in header CSV cells with pgfplotstable?
In the following csv file example, I want to automatically replace a string pattern in all headers cells when importing with pgfplotstable:
\begin{filecontents*}{sample.csv}
parameter,cubic ...
- 769
1
vote
1
answer
77
views
Is there any way to retrieve saved string in the beginning of document from its end in LuaLaTeX?
There are different types of “registers” in LuaTeX. With totcount package, you can save counter (number) from any place in a document and get its value also in any place in a document with the help of ...
- 161
0
votes
0
answers
55
views
Transferring the concepts "string" and "character" into TeX/LaTeX
(Looking at packages like l3string, xstring and stringstrings tempted me to post the following: )
The concepts "string" and "character" to me seem not well defined in (La)TeX.
...
- 27.5k
0
votes
0
answers
117
views
ifstrempty Renders always False
The following minimal example makes problems:
\usepackage{etoolbox}
\newcommand{\foo}{}
\begin{document}
\ifstrempty{\foo}{True}{False} % This is always False
\end{document}
Why is ifstrempty ...
- 169
2
votes
2
answers
157
views
Using \g@addto@macro in a loop
I am confused when using \g@addto@macro in a loop. My code is:
\documentclass{article}
\usepackage{ifthen}
\usepackage{newfile}
\usepackage{xstring}
\makeatletter
\DeclareRobustCommand\@initial[1]{#...
- 119
2
votes
2
answers
68
views
How to compare an argument to a given string, within a 'newenvironment' definition?
Problem description
I am trying to create an environment that produces boxed paragraphs with different styles.
So I tried to implement some "if"-"elif"-"else" blocks, ...
- 23
1
vote
0
answers
22
views
Biblatex : replace "In" by another entry in APA style [duplicate]
I would like to put the strings like "In" in french (so "Dans") in a APA bibliography with biblatex.
I tried to use the answer of this post, it works until I put the biblatex style ...
- 13
1
vote
2
answers
43
views
Using string to process a macro name using listofitems seems to fail
I am trying to process the name of a command using listofitems, but when I am using \string to convert that command it does not behave the way I think it would behave.
Here is a code to illustrate:
\...
- 4,703
5
votes
3
answers
511
views
How to write a fully-expandable string slice in LaTeX3
I am trying to create a LaTeX3 function that slices a string at the first - character.
So far I have
\cs_new:Nn \__slice_at_char:NN {
\int_set:Nn \l__slice_pos_int {1}
\str_map_inline:Nn #1 {
...
- 661
3
votes
1
answer
96
views
ConTeXt: Replace matching substring with macro output
Background
Looking to replace a string within a document with an equivalent string created using a macro. For example, I'd like to replace "McAnulty" with "\Mac Anulty".
Problem
...
- 11.6k
3
votes
2
answers
198
views
Automatically highlighting name in bibliography doesn't work with middle initial
I've been trying to figure out a way to automatically highlight my name in the bibliography. I thought that I could just compare first name and \namepartgiven and last name with \namepartfamily, but ...
- 33
0
votes
1
answer
66
views
How to pass the content of a TeX variable to Lua without luastring and luacode?
I try to pass the content of a Tex variable to lua, but I don't use luacode. Is there a way to avoid it ?
\documentclass{article}
%\usepackage{pgfkeys}
%\pgfkeys{
% JobName/.code={\directlua{ ...
- 16.9k
0
votes
1
answer
72
views
How to expand a macro argument into a string, remove all the spaces, then append and prepend the string inside a \NewDocumentCommand macro definition?
I want to expand a macro argument into a string, remove all the spaces, then append and prepend the string inside a \NewDocumentCommand macro definition.
Here's my MWE using LuaLaTeX.
\documentclass[...
- 321
1
vote
1
answer
79
views
ConTeXt: String substitution to include macro
Background
A Markdown document uses certain strings that are to be typeset in a special way. In this case, we'd like to typeset a.m. and p.m. as small caps wherever that text appears in the source ...
- 11.6k
2
votes
1
answer
71
views
A macro that takes in a variable that is a number, interprets it as a string, check if it has a plus sign, removes it, then stores it to the variable
I want to create a macro \foo that takes in a \newcommand variable that is a number, e.g., \bar where it's defined as
\newcommand{\bar}{<number>}
and interprets it as a string, then checks if ...
- 321
2
votes
1
answer
144
views
Remove all spaces from string (including \quad and \hspace)
I want to retrieve all characters besides any space (tabulation) ones including , ~, \space, \enspace, \quad, \qquad etc. that have been passed as an argument.
Say we have a command \removespaces{...}...
- 4,126
3
votes
4
answers
939
views
Convert numeric string to Roman numeral
I have a (sub)string (not a counter) which consists of an Arabic number. Is there an easy to convert this string to a Roman numeral? I suppose I could build an array of sorts, but I think this would ...
- 6,650
1
vote
1
answer
87
views
Writing to a file values of function in expl3
I'm trying to master LaTeX3 using the example of the problem of parsing LaTeX code and then writing function values to a file.
Problem. Generate a piece of XML file in pdfLaTeX containing normalized ...
- 119
1
vote
0
answers
69
views
\string\noindent outputs a quotation mark " instead of a backslash \
I used \string\noindent to output a command \noindent, but the result is "noindent.
I also tried with \verb|\noindent| and \texttt{\noindent}, but the results are the same.
I found a question may ...
- 11