{strings} are sequences of characters (most commonly literal constants).

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2
votes
1answer
13 views

Compare authors of two natbib references

I am trying to find out whether two references have the same author with natbib. But I seem to be unable to get basic string comparisons working. Without a deeper understanding, I have tried ...
1
vote
1answer
46 views

Wrong string color in embedded code

My problem is that when I use the correct quotation marks ``'', lstset does not recognize strings in my code and thus does not color-code them. When I use standard double quotes "", the leading ...
4
votes
1answer
40 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 ...
0
votes
1answer
29 views

Get first letter of the document title

I'm trying to get the first letter of the document title, but I'm not getting. I'm using a code as: \usepakage{xtring} \StrLeft{\thetitle}{1}[\firstletter] Result of compilation: Undefined control ...
3
votes
1answer
72 views

Formatted number printout in LuaTeX?

I have this code that I copied from What is a simple example of something you can do with LuaTeX?. \documentclass{article} \usepackage{luacode} \def\score#1#2#3{% \directlua{ s1 = #1; ...
4
votes
1answer
186 views

Command to count characters in a specified string

Is there a way to count the number of characters in a specified string? Suppose I had the following code. \documentclass{article} \newcommand{\numchars}[1]{\noindent The string ``#1" has ? ...
4
votes
2answers
59 views

String comparisons not working with textgreek

Following the solution from this question as a guide - Are there any "if" commands like "\ifnum" in LaTeX? - I have setup a newcommand to perform a string comparison. ...
5
votes
1answer
38 views

Replacing an id (integer) with a string?

I have a tex document that contains sections that are automatically generated. These sections have strings that are observation IDs. I would like to have latex replace all occurrences of an ID with ...
3
votes
2answers
119 views

Substitute string that contains a backslash

I need to create a function that will transform a string such as: Hello\textbackslash{}Bye into this: Hello \\ Bye I have tried using StrSubstitute (from the xstring package) without success. I ...
4
votes
4answers
91 views

Recursive String Parsing

I have been working on writing a recursive stream processor in latex that converts a shorthand version of a set of highly used commands into a much longer form. The code below represents what I had ...
3
votes
2answers
157 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 ...
2
votes
1answer
69 views

Define an expandable function for comparing a token list to a string in LaTeX3

In LaTeX3, I could define a function for comparing a token list to a string \cs_generate_variant:Nn \tl_if_eq:nnTF { V } \cs_new_nopar:Npn \module_compare:n #1 { \tl_if_eq:VnTF \g_some_tl { #1 ...
7
votes
2answers
188 views

How to split input string in a LaTeX command?

I would like a new command: \myfunc{string}, where string is something like: "a,b,x,y,x" and the effect of the command should be the following: \func{a}\func{b}\func{x}\func{y}\func{x}, where \func{} ...
0
votes
0answers
38 views

Different bibtex tags content enclosing and string concatenation

I had noticed strange (in my opinion) behaviour of string concatenation in bibtex entry. I tested three different examples: @string{abc={ABC}} @string{def={DEF}} @string{abc="{ABC}"} ...
3
votes
1answer
73 views

Nested or variable functions of xstring

My idea is to use xstring package for dealing with some string tests. In my case, I used the \strLeft function for extracting the 3 first letters of a string. Then, I use this result in \IfStrEqCase ...
0
votes
0answers
29 views

How to load input file with given starting string but unknown end?

In the directory of my latex source there are input files: input_01.tex, input_02.tex, etc. It is very easy to load them with a for cycle. But how to load them if their names are: ...
4
votes
3answers
246 views

LaTeX: Access every character of an string variable

I'm using variables to create strings in that way \newcommand{\myText}{2014/12/20} \myText{} This works great. Now, I can to access every single character of this string (length is 10), because in ...
1
vote
0answers
19 views

Bibliography string 'print' undefined [duplicate]

I use biblatex and a special fonencoding for the cyrillic alphabet. Everything works fine, only the bibliography prints an additional, unwanted string 'print' at the end of each item. Here's my code: ...
0
votes
0answers
41 views

Strip control characters from token

I've added a hook to lstlisting to do some special highlighting. Now I've got it to highlight %-prefixed variables just fine, but I'd like to handle the special case "%this" in another way. ...
5
votes
1answer
178 views

Biblatex abbrevation for no author/editor/year/etc. in alphabetic style

I use an alphabetic citestyle with biblatex. Sometimes I have entries where no author or editor or year is given. For example there is often no editor for a proceeding. At the moment I leave the entry ...
9
votes
2answers
201 views

Replace every backslash in a string with a forwardslash

I would like to replace every backslash \ inside a macro (string) with a forwardslash /. The macro is intended to contain a filename in Windows notation which should be replaced by a valid (La)TeX ...
3
votes
1answer
72 views

Expand arguments in string substitution macro

Rewritten as minimum non-working example: \documentclass{article} \makeatletter \usepackage{xstring} \usepackage{xparse} \newcommand\textfromcase[1]{% \IfEqCase{#1}{% for the purposes of this ...
1
vote
1answer
53 views

A command for making a string of characters [duplicate]

How can I make a command (or is there an existing one?) which takes two arguments: 1) character type 2) N (count) and puts N number of characters side by side? \newcommand{\foo}[2] { % sample: ...
1
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0answers
41 views

Bibliography string 'by' undefined in Canadian

I use babel with the canadian language, and biblatex-chicago. If I use a @inbook reference with a bookauthor field, I get the following error: Bibliography string 'by' undefined at entry 'smith' on ...
8
votes
5answers
414 views

A command which concatenates a string an arbitrary number of times

I'm trying to define a command \repeatstring{#1}{#2} which repeats the string #2 #1 times. Here is what I tried: (it is based on what I found in How to concatenate strings into a single command?) ...
4
votes
2answers
77 views

xmakefirstuc combined with MakeTextLowercase

I am trying to convert a string as in the example, with all lowercase characters except the first. However, xmakefirstuc does not like me that much. Here's my MWE: % arara: pdflatex ...
8
votes
2answers
141 views

Creating bullet-list from string with delimiters

I want to create a bullet list from a string with delimiters in it. The delimiter in my example is | Example string: This is|A bullet|List from|A string I want to get that to become a bulletlist ...
8
votes
1answer
71 views

Defining a reusable string from within an environment

I write documents that rely heavily on the 'enumerate' environment. I'd like to turn any particular item from within that environment into a variable that I can use elsewhere. The idea is to ensure ...
2
votes
1answer
1k views

ifthenelse equal string comparison fails

I am trying to fix some problems with the accessibility.sty package from www.babs.gmxhome.de There is one string comparison which always results to false, i.e. the language code definition will not ...
6
votes
1answer
209 views

How do I implement a string buffer in TeX?

I've recently learned how to create a macro to iterate over a token sequence using \afterassignment and \let in TeX. Currently, I'm trying to apply this to a tokenization macro (where "tokenization" ...
1
vote
1answer
106 views

Extra the word 'numberstyle' in listing

What's wrong with this ? I define listing style like below. \definecolor{codegreen}{rgb}{0,0.6,0} \definecolor{codegray}{rgb}{0.5,0.5,0.5} \definecolor{codepurple}{rgb}{0.58,0,0.82} ...
4
votes
2answers
88 views

Replacing substrings by linebreaks

I have a LaTeX document with several authors that I enter like \author{First Author \& Second Author \& .... In some places in the document I want to print these authors with a linebreak ...
3
votes
2answers
227 views

Listings problem with quotes in a string

A single quote occuring inside a listings string seems to be interpreted as ending the string. Is there a way to avoid this from happening? \documentclass[12pt]{article} \usepackage[top=0.3in, ...
4
votes
2answers
130 views

numberstringnum or numberstring in lowercase

I have tried a lot to use the \numberstringnum and \numberstring macros but it appears incomplete or even do not appear on the text. So I tested in the female version, like below: ...
4
votes
1answer
106 views

Extract from a token containing a list with math content

I have a token which contains a list consisting of: a date in YYYY-MM-DD format, followed by a colon, and some text which may contain math. The text will consist of a sentence or two (i.e., no ...
23
votes
3answers
834 views

Change the color of capital letters

Is there a way to define a command that changes the colour of any capital letter in an input string? Most of the results I find when I type "LaTeX string capital" are results about capitalizing the ...
3
votes
2answers
121 views

Generate comma separated list with some non-empty strings

I'm trying to generate a comma separated list that uses strings that may or may not be empty. For example \mylist{\stringA,\stringB,\stringC} would expand to A, C if B is empty or B, C if A is empty, ...
3
votes
1answer
91 views

convert string to active character

in my book I will have to itemize a lot of things in different lists. That's why I want to reduce my commands to a minimum. This script is just part of a bigger macro. \documentclass{book} ...
8
votes
2answers
183 views

Split a character string n by n

I want to split a character string n by n. I know how to do that 1 by 1 : \documentclass{article} \makeatletter \def\s@plit<#1#2>{% \ifx\empty#2% #1% \else #1,\s@plit<#2>% ...
2
votes
1answer
152 views

Writing macros for tikz-cd arrow options

I'm trying to write a macro to let me write shorthand for tikz-cd arrows. For instance instead of having to write out the full command \arrow[swap, dotted]{r}{f^*} I'd like to have a shorthand ...
3
votes
1answer
139 views

Using strings to list parameters for tikz-cd arrows

I'm trying to write some macros for making tikz-cd commutative diagrams. In tikz-cd you can give your arrows options like "bend left" or "dotted", in a comma-delimited list: \documentclass{article} ...
14
votes
2answers
661 views

String comparison in \ifthenelse

I want find a certain line of text in a data file cities.txt: A;London B;Berlin C;Paris with the xstring and [xifthen][2] packages: \documentclass[12pt, a4paper]{article} \usepackage{xstring} ...
5
votes
1answer
79 views

Using \newcommand to format numbers/strings according to a pattern [duplicate]

I'm an aspiring LaTeX user and have so far managed the first steps and created my first few documents. Coming from a programming background I've been wondering how you could use \newcommand to create ...
5
votes
0answers
27 views

Comparing last character(s) of the output of \ref to manipulate output [duplicate]

I am trying to write a command that will replace \ref in a special way. It will add some text next to the number based on the last character(s) of the number \ref outputs. I will try to explain this ...
2
votes
1answer
176 views

Latex: splitting/processing strings inside a latex command

Let's say I have \ingredients {% \unit[375]{g} & Farina 00\\ \unit[250]{g} & Burro\\ \unit[3]{g} & Sale\\ 1 & Limone } (you got me: I'm dealing with xcookybooky) ...
14
votes
3answers
920 views

Equivalent to “in” operator

I want to write a command that responds to an argument being in one set of reference strings or another. The argument takes a (musical) note name, and the command will print an accidental depending ...
8
votes
1answer
239 views

How to do multiple string replacements?

I want to escape URL paths to obtain the percent-escaping that is also applied e.g. by browsers. For this purpose I tried to do the following (out-commented lines are meant to show what I'm aiming ...
6
votes
1answer
179 views

Can I define a variable that contains a URL (youtube) and call \includemedia with it?

I can successfully embed a video in my latex file using a syntax like this: \documentclass[10pt,letterpaper]{book} \usepackage[latin1]{inputenc} \usepackage{amsmath} \usepackage{amsfonts} ...
3
votes
2answers
230 views

Converting an underscored string to camelcase

I would like to take a string containing underscores and convert it to CamelCase. I am attempting to do this using the stringstrings package. Here is my code: \documentclass[11pt]{report} ...
10
votes
3answers
245 views

how to select a character (or word) from a list

Is there a way, with the following restrictions: No external pacakges (i.e., no substr) no conditionals (\ifnum, \ifdefined, etc) to select a character from a string? i.e. \CharAt{2}{ABC} ...