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Converting "’" to an Apostrophe?
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Converting "’" to an Apostrophe? maria 02-27-2008
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Posted by Tad J McClellan on February 28, 2008, 7:36 pm
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> $xml =~ s/’/'/sg;


The s///s modifier makes dot in your pattern match a newline.

It is a no-op when your pattern does not have a dot in it.


--
Tad McClellan
email: perl -le "print scalar reverse qq/moc.noitatibaher0cmdat/"

Posted by Petr Vileta on February 28, 2008, 8:42 pm
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 Tad J McClellan wrote:
>
>> $xml =~ s/’/'/sg;
>
>
> The s///s modifier makes dot in your pattern match a newline.
>
> It is a no-op when your pattern does not have a dot in it.

I have seen it many times but my book say some bit different.

<cite>
Larry Wall, Tom Christiansen & Randal L. Schwartz
Programming in Perl (Czech translation, 1997)

Chapter 2: Basic program parts, page 74

Modifiers:
....
s Work with string as with single line.
</cite>

Nowhere any word about dot in regexp. I wrote many s/// for strings containing
\n and where wasn't be any dots in pattern and on some server this work
without /s modifier but on other not. Maybe somewhere was be Perl 5.0 or
older, I don't know. But by me is better to write "noop" modifier instead of
to write not functional regexp/replacement.

--
Petr Vileta, Czech republic
(My server rejects all messages from Yahoo and Hotmail. Send me your
mail from another non-spammer site please.)

Please reply to <petr AT practisoft DOT cz>


Posted by A. Sinan Unur on February 28, 2008, 9:57 pm
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> Tad J McClellan wrote:
>>
>>> $xml =~ s/&#x2019;/'/sg;
>>
>>
>> The s///s modifier makes dot in your pattern match a newline.
>>
>> It is a no-op when your pattern does not have a dot in it.
>
> I have seen it many times but my book say some bit different.
>
> <cite>
> Larry Wall, Tom Christiansen & Randal L. Schwartz
> Programming in Perl (Czech translation, 1997)
>
> Chapter 2: Basic program parts, page 74
>
> Modifiers:
> ....
> s Work with string as with single line.
> </cite>

In the mean time, here in 2008, in the docs shipped with Perl 5.10

perldoc perlop

s Treat string as single line. (Make . match a newline)

Sinan

--
(remove .invalid and reverse each component for email address)
clpmisc guidelines: <URL:http://www.rehabitation.com/clpmisc.shtml>


Posted by Gunnar Hjalmarsson on February 28, 2008, 10:41 pm
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A. Sinan Unur wrote:
> In the mean time, here in 2008, in the docs shipped with Perl 5.10
>
> perldoc perlop
>
> s Treat string as single line. (Make . match a newline)

Great, that's a clarification I wasn't aware of.

Hopefully, in the future (Perl 5.12?), "perldoc perlop" will contain a
useful explanation of the /m operator as well. Or at least a reference
to "perldoc perlre".

--
Gunnar Hjalmarsson
Email: http://www.gunnar.cc/cgi-bin/contact.pl

Posted by Peter J. Holzer on March 1, 2008, 5:15 am
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> A. Sinan Unur wrote:
>> In the mean time, here in 2008, in the docs shipped with Perl 5.10
>>
>> perldoc perlop
>>
>> s Treat string as single line. (Make . match a newline)
>
> Great, that's a clarification I wasn't aware of.

You never read perldoc perlre? It has always explained the exact meaning
of the s and m modifiers (at least since 1995 or so - I haven't used
perl before that).


> Hopefully, in the future (Perl 5.12?), "perldoc perlop" will contain a
> useful explanation of the /m operator as well. Or at least a reference
> to "perldoc perlre".


The latter is there since at least perl 5.6.0 (in the paragraph before
the options). In perl 5.10, it's now a paragraph of its own (instead of
just one sentence in a paragraph) at the end of the qr/STRING/msixpo
section.

        hp


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