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FAQ 4.20 How do I unescape a string?
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FAQ 4.20 How do I unescape a string? PerlFAQ Server 05-03-2008
Posted by PerlFAQ Server on May 3, 2008, 9:03 am
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 This is an excerpt from the latest version perlfaq4.pod, which
comes with the standard Perl distribution. These postings aim to
reduce the number of repeated questions as well as allow the community
to review and update the answers. The latest version of the complete
perlfaq is at http://faq.perl.org .

--------------------------------------------------------------------

4.20: How do I unescape a string?

It depends just what you mean by "escape". URL escapes are dealt with in
perlfaq9. Shell escapes with the backslash ("\") character are removed
with

s/\(.)/$1/g;

This won't expand "\n" or "\t" or any other special escapes.



--------------------------------------------------------------------

The perlfaq-workers, a group of volunteers, maintain the perlfaq. They
are not necessarily experts in every domain where Perl might show up,
so please include as much information as possible and relevant in any
corrections. The perlfaq-workers also don't have access to every
operating system or platform, so please include relevant details for
corrections to examples that do not work on particular platforms.
Working code is greatly appreciated.

If you'd like to help maintain the perlfaq, see the details in
perlfaq.pod.

Posted by szr on May 3, 2008, 3:22 pm
Please log in for more thread options
 PerlFAQ Server wrote:
> This is an excerpt from the latest version perlfaq4.pod, which
> comes with the standard Perl distribution. These postings aim to
> reduce the number of repeated questions as well as allow the community
> to review and update the answers. The latest version of the complete
> perlfaq is at http://faq.perl.org .
>
> --------------------------------------------------------------------
>
> 4.20: How do I unescape a string?
>
> It depends just what you mean by "escape". URL escapes are dealt
> with in perlfaq9. Shell escapes with the backslash ("\") character
> are removed with
>
> s/\(.)/$1/g;
>
> This won't expand "\n" or "\t" or any other special escapes.

This will:

$ perl -Mstrict -e '
my $s=q{12\t3 \* 456 \n 789};
$s =~ s/\(.)/"\"\$1\""/gee;
print $s
'
12 3 * 456
789


:-)

--
szr



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