This question is extension of this question about listing questions of directories. I get a problem that I need to understand the original section of the text. Current outputwhere you see the second question does not make sense. It was included in the subsection Takayasu arteritis in the directory Rheumatology:\subsection{Takayasu arteritis}\begin{question}{You get a patient. What do you notice first in this patient?}Absence of peripheral pulse.\end{question}Lorem ipsum.    \begin{question}{What was the first Takayasu case?}Young woman in Asia with red vessels in the eye. So special eye diagnosis done. Affects eye.\end{question}where the current output is by this excellent code\section{Rheumatology}  \begin{question}{You get a patient. What do you notice first in this patient?}Absence of peripheral pulse.\end{question}\begin{question}{What was the first Takayasu case?}Young woman in Asia with red vessels in the eye. So special eye diagnosis done. Affects eye.\end{question}but I would like it to be\section{Rheumatology}  \subsection{Takayasu arteritis}\begin{question}{You get a patient. What do you notice first in this patient?}Absence of peripheral pulse.\end{question}\begin{question}{What was the first Takayasu case?}Young woman in Asia with red vessels in the eye. So special eye diagnosis done. Affects eye.\end{question}My proposal is to include subsections if there are questions within the subsection. My pseudocodeLook for the environment \begin{question}...\end{question}.See the subsection of the question (it locates above the question).    If there is no subsection, leave blank.    If there are many questions within one subsection, put only one subsection. Terdon's code#!/usr/bin/env bash## avoid errors if a directory has no *tex filesshopt -s nullglobdirectories=(Cardiology Rheumatology Surgery);## Change this to set whichever options you want.printf %s\n%s\n \documentclass{YOURCLASS} \begin{document}for directory in ${directories[@]}do    ## Reset the counter, avoid empty sections.    c=0;    for file in $directory/*tex    do        let c++        [ $c -eq 1 ] && printf \n%s\n \section{$directory}        ## Extract the wanted lines        perl -lne '$a=1 && print  if /\\begin{question}/;                   print if $a==1;                  $a=0 if /\\end{question}/;' $file         echo     donedoneecho \end{document}where I think the logic of these lines should be changed        ## Extract the wanted lines        perl -lne '$a=1 && print  if /\\begin{question}/;                   print if $a==1;                  $a=0 if /\\end{question}/;' $file         echo which uses a regex to find all questions in a file, AND ignores the subsections of the questions. Example of data (little different from the last case!)\subsection{Takayasu arteritis}\begin{question}{You get a patient. What do you notice first in this patient?}Absence of peripheral pulse.\end{question}\begin{question}{What was the first Takayasu case?}Young woman in Asia with red vessels in the eye. So special eye diagnosis done. Affects eye.\end{question}Fever of unknown origin can be used when you do not know what is causing the disease. % Show cases in MedScape and ask class. Aneurysms. \subsubsection{Treatment}\begin{question}{What you should always include in Takayasu treatment? What are the symptoms?}Blood pressure.Aneurysms which will burst without treatment. So blood pressure decreasing drugs like beta blockers along in combination with other drugs.\end{question}\begin{question}{When is the checkup of the Takayasu arteritis?} Only once per year. You could expect every month like normally in this kind of diseases.But only once per year.\end{question}where you can ignore subsubsections in the application.How can you write the pseudocode?Bug in Terdon's code 14.10.2014 foundExample of data which causes the bug\subsection{3}A 55 y.o male says that for the last year ... \begin{question}{What is the pathogenetic mechanism of his complains?} \end{question}which parsed by Terdon's code gives exactly the same result which is wrong, since the sentence A 55 y.o... should not be there anymore in the final result.If there is a enter between the subsection and the body text, then correct output. However, this cannot be assumed.The cause of this bug is the Windows symbols, moved here.
How to write this pseudocode where condition
text processing;scripting;perl;latex
I was going to extend my original code but it is getting to a point where it's much easier to just reimplement everything in Perl directly:#!/usr/bin/env perl## This is the path to the target  directoriesmy $path=/Users/Masi/Dropbox/;## The target directoriesmy @directories=(Cardiology,Rheumatology,Surgery);## Iterate over the directoriesforeach my $dir (@directories) {    my $dd=0;    ## Read the current directory    opendir (my $DIR, $path/$dir);    ## Find all files in this directory    while (my $file = readdir($DIR)) {        ## Reset the counter        my $c=0;        ## Skip any files that aren't .tex        next unless $file =~ /\.tex$/;        ## Open the file        open(my $fh,$path/$dir/$file);        while (<$fh>) {            ## Get the subsection. $_ is the current line.            $sub=$_ and $n=0 if /\\subsection{/;            ## If this line is a question            if (/\\begin{question}/) {                ## If this counter is 0, this is the first file                ## of this directory, so print the section                ## Print the section name                if ($dd==0) {                    print \\section{$dir}\n\n;                    $dd++;                }                 ## If this counter is 0, this is the first question                ## of this subsection, so print the subsection line                print $sub\n if $n==0;                $n++;                ## Increment the counter, we want these lines                $c++;                ## And print                print;            }            else {                ## Print lines if the counter is 1                print if $c==1;                ## reset the counter to 0                print \n and $c=0 if /\\end{question}/;            }        }        print \n;    }}Note that this ignores subsubsections but it would be easy to modify it to include them.