使用 Perl 6 进行批处理文本

Batch text processing with Perl 6

我正在阅读 Laurent Rosenfeld 和 Allen B. Downey 合着的 Think Perl 6 最近读的很不错

它的 .tex 文件在 github here.

中可用

它有这样的代码示例:

我相信代码块 colored 会非常有用:

为此,我们必须批处理上述存储库中包含的所有 .tex 文件。 为此,我们必须转换乳胶代码:

\begin{verbatim}
        say 42 ==  42;           # True
        say 42 ==  42.0;         # True
        say 42 ===  42;          # True
        say 42 === 42.0;         # False
\end{verbatim}


\begin{verbatim}
$x eq $y            # $x is string-wise equal to $y
$x ne $y            # $x is string-wise not equal to $y
$x gt $y            # $x is greater than $y (alphabetically after)
$x lt $y            # $x is less than $y (alphabetically before)
$x ge $y            # $x is greater than or equal to $y
$x le $y            # $x is less than or equal to $y
$x eqv $y           # $x is truly equivalent to $y
\end{verbatim}

\begin{minted}{perl6}
        say 42 ==  42;           # True
        say 42 ==  42.0;         # True
        say 42 ===  42;          # True
        say 42 === 42.0;         # False
\end{minted}


\begin{minted}{perl6}
$x eq $y            # $x is string-wise equal to $y
$x ne $y            # $x is string-wise not equal to $y
$x gt $y            # $x is greater than $y (alphabetically after)
$x lt $y            # $x is less than $y (alphabetically before)
$x ge $y            # $x is greater than or equal to $y
$x le $y            # $x is less than or equal to $y
$x eqv $y           # $x is truly equivalent to $y
\end{minted}

我想用 Perl 6 来完成这个。 这是我打算做的。

THIS IS DUMMY CODE

# First I want to skim all the .tex files in the cloned repo (with git) 

for dir("ThinkPerl6/book") ->$file {
  say $file if $file~~/\.tex/;
}

# Read each .tex file and modify, replace `\begin{verbatim}` with `\begin{minted}{perl6}`

for "$file.tex".IO.lines -> $line {
  substitute with "\begin{minted}{perl6}" if $line ~~/\begin\{verbatim\}/;
}

# Read each .tex file and modify, replace `\end{verbatim}` with `\end{minted}`

for "$file.tex".IO.lines -> $line {
  substitute with "\end{minted}" if $line ~~/\end\{verbatim\}/;
}

我不能超越那个。有什么帮助吗?使用正则表达式会很有帮助。

此致,

苏曼

您需要完成以下步骤:

  • 为应用了替换的每一行创建一个副本。您可以使用 subst method 作为
  • 将修改后的副本写入新文件(可能添加扩展名 .new 左右)
  • (可选)移动 .new 以覆盖原始文件。请参阅 this example 以获取灵感。

希望对您有所帮助。

这是莫里茨前两个要点的一个实现。

my $fh-out = open "$file.new.tex", :w; # Create a new file

# Read in old file, line by line
for "$file.tex".IO.lines -> $line is copy {

    # Make changes, if needed
    $line.=subst('\begin\{verbatim\}','\begin{minted}{perl6}');
    $line.=subst('\end\{verbatim\}','\end{minted}');

    # Print line to new file
    $fh-out.put: $line;
}