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Why this does not work when the lines are produced using \newline (instead of ^^J) and \StrSubstitute as follows? Thanks

\documentclass{article}
\usepackage{xstring}

\begin{document}


\def\mystrings{\noindent\StrSubstitute{%
B; new; test old; found people; sun; atom; number; life}%
{; }{\noexpand\noexpand\noexpand\newline}}
\mystrings
% B
% new
% test old
% found people
% sun
% atom
% number
% life


\newwrite\file
\immediate\openout\file=mystrings.txt
\immediate\write\file{\mystrings}
\closeout\file


\end{document}
Krantz
  • 159
  • \StrSubstitute is not expandable, it won't work in \write. – Ulrike Fischer Oct 28 '23 at 13:45
  • Hi @Ulrike Fischer. Thank you. How can we solve this then? Any thoughts? – Krantz Oct 28 '23 at 13:46
  • in expl3 are expandable commands, or you do the substitution first and only write the result string. – Ulrike Fischer Oct 28 '23 at 13:51
  • xstring commands generally are not expandable, also why use \newline here? that adds some glue and penalties to affect tex's typesetting algorithms but doesn't do anything useful in a \write – David Carlisle Oct 28 '23 at 14:01
  • Hi @ Ulrike Fischer @DavidCarlisle. Thank you. newline was added to replace ; with new line. And that does the job as you can see. The problem was when trying write. – Krantz Oct 28 '23 at 14:09

1 Answers1

1

It's not really clear what you want here but perhaps

\documentclass{article}

\begin{document}


\def\mystrings{ B; new; test old; found people; sun; atom; number; life}%


\newwrite\file
\immediate\openout\file=mystrings.txt
{\newlinechar=`;
\immediate\write\file{\mystrings}
}
\closeout\file


\end{document}

which produces the file

 B
 new
 test old
 found people
 sun
 atom
 number
 life
David Carlisle
  • 757,742