{programming} is about how (La)TeX can be used as a programming language.

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3
votes
2answers
74 views

Count number of elements in a list

This question is somewhat similar to Count the number of elements of each size in a list. It should actually be simpler but I nevertheless can't figure out how to do it without using the same code as ...
6
votes
0answers
45 views

Table of contents with xtemplate (expl3)

Every time I typeset some book or articles, I start to renew sectioning commands (\part, \section, some \@-commands and so on), \maketitle, \tableofcontents commands by copy-pasting it to my class and ...
4
votes
1answer
57 views

Text formating depending on conditions

I have some conditions which are stored in boolean variables, such as \bool_new:N \l_word_numbered_bool \bool_new:N \l_word_lowercase_bool \bool_new:N \l_word_centering_bool I need to format words ...
12
votes
4answers
925 views

Implementation of a C compiler in TeX ?

Seeing the many things already done with TeX, I wonder if anyone has implemented a C (or C++) compiler in TeX. This does not seem too far fetched as an experiment. I do not expect great performance. ...
0
votes
0answers
57 views

Are there any tools for Image -> LaTeX?

Are there any existing tools which take as input: TypeSet Math Formula output: LaTeX code which produces something similar to the existing math formula? Googling "inverse LaTex" gets answers about ...
2
votes
2answers
44 views

Being able to define headers by hand in each part/chapter of a book

Consider the following code inspired from egreg's answer to this topic: \documentclass[11pt,a4paper]{book} \usepackage[utf8]{inputenc} \usepackage[T1]{fontenc} \usepackage[french]{babel} ...
0
votes
1answer
67 views

How to use Programming possibilities of LaTeX [closed]

How do \newcommand, \newcommand*, \renewcommand, \renewcommand*, \newenvironment, \newenvironment*, \renewenvironment, \newenvironment* work and what is difference between them?
1
vote
0answers
50 views

How to Extract Elements?

I could not find the right answer on the following question: If we have finite vector (a_{1},a_{2},...,a_{n}), how to extract any element from it, for example a_{5}? To say more clearly, I need an ...
1
vote
0answers
29 views

How may I program the following with Python? [closed]

please help me do the following with python create a directory - say - dir_01. open a file - say - file_01 and write "hello - 01" into that file and close the file. run the command (on a Linux ...
109
votes
4answers
15k views

Where do I start LaTeX programming?

I'm interested in writing packages for TeX/LaTeX/XeLaTeX. I googled around, but all I found was guides or tutorials about how to prepare documents using LaTeX. I want to know how LaTeX works and how ...
11
votes
2answers
517 views

\rand inside \forloop creates identical values

I try to create a table with random entries... By browsing the random tag, I found some help on random number generators and I tried using lcg. Surprisingly I seem to create the same random number ...
8
votes
5answers
321 views

A more elegant version of the \ifnot macro

A TUGboat article of 15 years ago mentions an \ifnot macro by David Kastrup whose implementation is: \def\ifnot#1{#1\else \expandafter\expandafter\fi \iffalse\iftrue\fi} However, this macro ...
4
votes
1answer
52 views

Extract the last word from a sentence stored in a variable

I want to extract the last word of a sentence stored in a variable, e.g. \thevariable. Here is the minimal example. \documentclass{article} % Function to extract the last word of a sentence ...
5
votes
2answers
60 views

How to determine if a macro argument contains the macro itself?

I would like to have a way to detect if a particular macro's argument contains that particular macro itself. Consider the following MNWE: \documentclass{article} \usepackage{etoolbox} ...
5
votes
0answers
196 views

Is it possible to produce a context free grammar for Tikz path? node?

Even further, I would be happy to see a definition of the tikz language in the usual manner programming languages such as Java and Pascal are defined. The reason I ask is that I keep getting ...
0
votes
1answer
26 views

Names on certificates [duplicate]

I have to make some certificates. The main problem is not the certificate itself but to change names between pages. Can I create a list of names, each of appears once for page?
3
votes
3answers
67 views

Find the number of elements in a list that occurs most often

First: This is similar to "Count the number of elements of each size in a list" and "Position of largest element in a list" but it's not the same. Code + question: \documentclass{beamer} ...
6
votes
2answers
185 views

How can I use a list stored in aux and insert its output into a tikz node?

# Update 2015-03-19 Better Answer Found This question is part of a trail of questions. The goal mine was to use this list inside of a tikz node, but I removed that from previous questions in the ...
3
votes
2answers
185 views

How can I loop thru a list of inputs that come after \maketitle, yet use that list as part of the \maketitle command?

Multilingual Document Question I would like to follow the principle of "don't repeat yourself" and create a single list of inputs, which are actually various versions of the same document in ...
3
votes
3answers
184 views

How can I create a list as a variable that can be appended and eventually typeset?

Question In languages such as Python, you can define a list like so: example_list = ['apples'] I can append this list like so: example_list.append('oranges') I can print this list using print ...
3
votes
2answers
112 views

Count the number of elements of each size in a list

Comment: The following question is somewhat similar to "Position of largest element in a list" but I'm (unfortunately) not familiar what LaTeX 3 programming so I'm forced to ask. :( Code: Consider ...
6
votes
1answer
138 views

TikZ programming/macros, \list construct

TikZ 3.0 manual, on page 83, we have (not complete code): \list{--}{\topsep=2pt\itemsep=0pt\parsep=0pt \parskip=0pt\labelwidth=8pt\leftmargin=8pt \itemindent=0pt\labelsep=2pt} #5 ...
2
votes
1answer
62 views

The text instead of chapter number

I just get some code from Pretty Table of Contents and modify it for my purpose)). But I need some variable text parameter or command for using instead of chapter number in the Table of Contents. ...
12
votes
3answers
397 views

Position of largest element in a list

Consider the following: \documentclass{article} \usepackage{expl3} \ExplSyntaxOn \cs_new_eq:NN \calc \fp_eval:n \ExplSyntaxOff \def\valueA{7} \def\valueB{19} \def\valueC{41} \def\valueD{31} ...
6
votes
2answers
89 views

Iterator-like command, where each use expands to an item from list defined earlier

What is the simplest way to create an iterator-like macro (in the functional programming sense) in pdfLaTeX? I'd like to predefine a list of elements (to simplify we can assume that it is plain ...
1
vote
0answers
72 views

What is the core of TeX as a programming language? [closed]

Tex (and LaTeX) mix programming elements with typesetting ones. It's often confusing to a beginner to tell them apart. Could anyone show me a list of the very core commands of TeX (and perhaps LaTeX) ...
5
votes
1answer
43 views

How to deduplicate and sort a list of \pagerefs?

I have a document comprised of three large, multi-page tables, all of which have links to items in a list of figures at the end. By generating md5 labels when I generate the latex for the tables, I ...
1
vote
1answer
57 views

How does one create a counted command (e.g. TODO) for use in a list?

Pretext: I am aware of packages such as todonotes, todo, and fixme, but this is more of a task for learning LaTeX programming. Therefore, the use of additional packages downloaded from CTAN is ...
0
votes
0answers
41 views

Command showing note page of the next frame

This question is based when I read the answer of... Note page showing the next frame I was wondering if it is possible just to define a command like \insertslideintonotes{<scale>} which then ...
4
votes
2answers
71 views

Change location of increasing text length

I have a very specific question and I hope someone can give me the benefit of their experience. I have around 17000 lines of text. I am printing this text onto somewhere around 80 double sided pages, ...
3
votes
2answers
166 views

Deleting duplicates from a comma-separated list of strings

This is a followup to Difference in compilation time between two slightly different versions. As became obvious when asking that question, the speed of that compilation is seriously affected by the ...
7
votes
1answer
187 views

Brainf**k Interpreter in LaTeX

Is there a way to build an interpreter for LaTeX to Brainf**k? A short introduction on how to tackle the task would be appreciated.
5
votes
2answers
242 views

Is it possible to insert C++ code into LaTeX?

I mean C++ doing some calculation not inserting the code as a text.
6
votes
1answer
66 views

Delimited \def's and expansion

I try to understand how work the macro named \separator in MWE . \documentclass[]{article} \def\separator#1\separator#2{% \unexpanded{#1}% \ifx*#2% \else , \expandafter\separator\expandafter#2% \fi ...
4
votes
2answers
365 views

Is it a convenient way to write longer program codes in LaTeX?

Before I only used ifthenelse and for loops, but not complicated data structures. I don't know what is the convenient way to write longer codes. As an example I would like to generate a random ...
1
vote
1answer
67 views

How to write totally expanded macro to file (with LaTeX kernel)

I want to write value of the macro \@authortofile to a file. Inside the macro it is another macro which is defined as separator between some words: \def\@separator{\def\@separator{, }} When I try ...
3
votes
2answers
145 views

Separator between author names (with LaTeX kernel programming)

I try to make my own macro for a typesetting an authors block instead of using package authblk. How can I suppress separator near the fist author of the article. Main condition is to use only LaTeX ...
0
votes
0answers
63 views

modify files and convert them to pdf

Say I have a bunch of word documents, powerpoint and excel files. I have some cover photo. I want to convert the files to pdf, add the cover photo and footer to the bottom of each page hello world ...
3
votes
1answer
128 views

Write/Read values of the LaTeX commands (like \title, \ author etc) in file using Lua

This problem relate with other my question here . I found a solution with pdfpages package thanks to TX.SX: \documentclass[]{scrbook} \usepackage{authblk} \usepackage{pdfpages} ...
0
votes
0answers
241 views

Creating a Multiple Choice Math Test with LaTeX and Automating It

I have decided to write an application which can manage test questions related to Mathematics. This application will use LaTeX as an intermediate format between questions and PDF output. Questions ...
53
votes
0answers
1k views

Can TeX generate “heap dumps” to analyze+optimize out-of-memory situations?

As package author of the memory-extensive package pgfplots, I have been asked to analyze some out-of-memory situation. I could identify the "culprit"; it was some call to \pdfmdfivesum in which it ...
0
votes
0answers
76 views

New header for moderncv classic style

I would like to achive a header like this for the moderncv classic style. Edit: For convenience I modified the header from the link to be in english. The thing on the left is a header with a table ...
3
votes
2answers
107 views

“Runaway argument?” error with \NewEnviron

I have two files. Basically, the main file just loads the environ package and inputs the secondary file. The secondary file creates an environment that basically does nothing, and creates one instance ...
3
votes
3answers
123 views

Beamer - writing a macro to uncover only item i of a enumerate in a frame

I would like to repeat a certain frame at multiple locations in my talk. However, at each time, I want either all the items to be uncovered or only item i to be uncovered. How do I define a macro ...
4
votes
1answer
55 views

Weird tipx error

Just for fun I wrote a converter for decimal numbers that prints them in bases < 37: \documentclass{article} \usepackage{fixltx2e,hyperref,ifthen} \usepackage{tipx} \makeatletter \newcount\mod ...
6
votes
1answer
2k views

Hello World in pdfLaTeX

After many years being silent, TeX can now talk! Almost minimal code below! It should be of particular interest to Physicists and Cosmologists. Need to have Adobe Reader installed. ...
3
votes
2answers
158 views

Compute the difference between two time points on different dates

This is a follow-up question to How to compute the difference between two time points (e.g., 11:30 am and 01:20 pm => 110 min)?. Consider the code from David's excellent answer here: ...
24
votes
5answers
5k views

Repeat command n times?

Is it possible to define a command, which repeats the following command n-times? Call it for example \Repeat, then \Repeat[4] \command{...} should be equivalent to \command{...} \command{...} ...
5
votes
2answers
1k views

Figure environment not working with included file (extra } or forgotten endgroup)

I've spent hours on this issue. I hope someone can help me. I'm running into some kind of interference when I try to use the figure environment (Likewise for table, might be related to floats). I ...
1
vote
1answer
62 views

Default spaces between letters in math-mode

Question for TeX-gurus. Sometimes I find that the default spaces between letters in the math TeX-mode is to short. Say, I would prefer to have slightly increased spaces between abc in $abc$. On the ...