如何编写这个伪代码 where 条件

Question

这个问题是这个问题的延伸列出目录的问题。我遇到一个问题，我需要理解文本的原始部分。

电流输出

你看到第二个问题没有意义。它被包含在subsection 大动脉炎在风湿病学目录中：

\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}

目前的输出是这样优秀的代码

\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}

但我希望它是

\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}

我的建议是，如果小节中存在问题，则应包含小节。

我的伪代码

Look 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. 

特登的代码

#!/usr/bin/env bash

## avoid errors if a directory has no *tex files
shopt -s nullglob

directories=("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 ""
    done
done
echo "\end{document}"

我认为这些行的逻辑应该改变

        ## Extract the wanted lines
        perl -lne '$a=1 && print "" if /\\begin{question}/; 
                  print if $a==1;
                  $a=0 if /\\end{question}/;' "$file" 
        echo ""

它使用正则表达式查找文件中的所有问题，并忽略问题的小节。

数据示例（与上一个案例略有不同！）

\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}

您可以在其中忽略应用程序中的小节。

你怎么能写出伪代码？

---

Terdon 代码中的错误 2014 年 10 月 14 日发现

导致错误的数据示例

\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}

由 Terdon 的代码解析得到的结果完全相同，但这是错误的，因为这句话一个55岁的..不应该再出现在最终结果中。如果小节和正文之间有输入，则正确输出。然而，这不能这样假设。

造成此错误的原因是 Windows 符号，已移动这里。

Answer 1

我本来打算扩展我的原始代码，但现在已经到了直接用 Perl 重新实现所有内容要容易得多的地步：

#!/usr/bin/env perl

## This is the path to the target  directories
my $path="/Users/Masi/Dropbox/";

## The target directories
my @directories=("Cardiology","Rheumatology","Surgery");

## Iterate over the directories
foreach 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";
    }

}

请注意，这会忽略子小节，但很容易对其进行修改以包含它们。

Answer 2

terdon代码的扩展或改进基于此中的一些逻辑回答

#!/usr/bin/env perl

## This is the path to the target  directories
my $path="/Users/Masi/Dropbox/";
chdir $path or die "cannot chdir '$path'";

## Iterate over the directories
foreach my $dir (
    "Cardiology", "Pathophysiology", "Patology and Biopsy", "Physiology",
    "Propedeutics", "Radiology", "Rheumatology", "Surgery"
)
{
    my $dd=0;
    ## Read the current directory
    opendir my $DIR, $dir or die "cannot opendir '$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";
    }
    closedir $DIR  or die "cannot closedir '$dir'";
}

我在其中添加了一些错误管理。