Questions tagged [programming]
{programming} is about how (La)TeX can be used as a programming language.
649
questions
2
votes
2
answers
130
views
Build a new command "newsymbol" with NewDocumentCommand
I want to create a new command \newsymbol, which functions like \newcommand, but with the difference that math is ensured. I also have another reason, why I want to define this new command, namely so ...
- 1,812
4
votes
1
answer
103
views
Why \IfPackageAtLeastTF{⟨package⟩}{⟨date⟩}{\PassOptionsToPackage{⟨option⟩}{⟨package⟩}}{} doesn't pass ⟨option⟩ to ⟨package⟩?
My current version of parskip is 2021-03-14 so:
\IfPackageAtLeastTF{parskip}{2018-08-24}{\PassOptionsToPackage{indent}{parskip}}{}
\usepackage{parskip}
should pass the indent option to parskip. But ...
- 9,840
0
votes
0
answers
21
views
How can I adjust the spacing between the number and the title of each level in TOC to create automatically a nested list?
In this code, I have defined custom sectioning formats using the titlesec package. However, I'm having trouble adjusting the spacing between the section numbers and titles, especially when the section ...
3
votes
2
answers
120
views
Best Practices for Integrating Computer Algebra Systems (CAS) into LaTeX Documents
I am currently working on enhancing my LaTeX documents to involve complex mathematical equations. Managing these equations manually often leads to errors, especially when changing dependent equations ...
- 983
2
votes
1
answer
51
views
How to trim spaces without expanding what is inside in expl3?
Consider the following pattern:
\NewDocumentCommand{\mycommand}{m}{
\myinternalcommand:n{#1}
}
\cs_new:Nn \myinternalcommand:n{
\tl_if_single:nTF{#1}{TRUE}{FALSE}
}
and let's say that I want ...
- 5,327
3
votes
1
answer
143
views
LaTeX3 regex not working
I have a very strange bug and I guess I am not using LaTeX3 regexes as they are supposed to be used. My current document looks like this:
\documentclass{standalone}
\ExplSyntaxOn
\regex_new:N{\...
- 5,327
0
votes
3
answers
60
views
In Latex3, how to test if all tokens in the input verify a test (for example \token_if_letter or \token_if_space)?
In Latex3, I would like to write a function that checks if every token of an input verify a predicate.
Basically I would like the multitoken version of this command:
\NewDocumentCommand{\mychecksingle}...
- 5,327
6
votes
2
answers
359
views
if_exist macros in LaTeX 3: what are they doing if they do not check the type of things they are supposed to check?
In the documentation of interface3, for several macros with the pattern xxxx_if_exist for xxxx being bool, str, seq and many others the following appear:
Tests whether the <boolean> is ...
- 5,327
1
vote
1
answer
203
views
Is LaTeX a programming framework of TeX?
My take from What is the difference between TeX and LaTeX? is that TeX is the programming language that renders the document. LaTeX is a well-known macro package for TeX with the aim to make the ...
- 1,510
3
votes
3
answers
650
views
Put many images into multiple pages programmatically
I have many images, for example
image01.jpg
image02.jpg
...
image80.jpg
I want to put those images into a document, 8 images per page, 4 rows and 2 columns (assume they will fit into one page that ...
- 137
10
votes
1
answer
384
views
Moving from pgfkeys to latex3 key-val system to handle package options
I have been advised in this question to move from pgfopts to latex3 to handle package options. I would like to do that but I must admit that I am a little lost. Examples with the patterns I'm using ...
- 5,327
4
votes
2
answers
94
views
Difference betwen .is family and .cd in pgfkeys in the context of package writing?
I am using pgfopts to create my own packages and handle options. .family and .cd can be used to group the package options together, but I am not sure to understand the pros and cons of each approach, ...
- 5,327
5
votes
3
answers
236
views
Counting the number of occurences of specific characters in a string in an expandable way
This question shows how to count the number of occurrences of a specific character in a string. I would like to do it in an expandable way, and for a list (not only one) of specific characters.
\...
- 5,327
0
votes
0
answers
95
views
Detect if something is a length?
Is there a way in LaTeX to detect if something is a length with a function of the form:
\NewDocumentCommand\iflength{m m m}{%CODE HERE%}
where:
the first parameter is the thing to be tested
the ...
- 5,327
0
votes
2
answers
114
views
A macro to check command expandability
I would like to create a command that checks whether an expression is fully expandable, and crashes if not (ideally printing an error message). I would like to do that without a specific TeX engine in ...
- 5,327