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brian d foy | 3 Jan 2006 20:00
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Re: Changes to perlfaq.pod intro

In article <m3mzigg9nt.wl_rs <at> pobox.com>, Robert Spier
<rspier <at> pobox.com> wrote:

> > I've updated the script that creates perlfaq.pod so it has a completely
> > different introduction. It's the same information edited, corrected, 
> > and much nicer sounding (I hope).

> Minor comments:
> 
>   - Lets take $Date: $ out of the DESCRIPTION.  That often gets used
>     for TITLEs and stuff in HTML transitions, and will look ugly.

Fine. I never really liked that. I can move it down to the bottom near
the AUTHORS section.

>   - Do we really need to put list email gaddresses and contribution
>     information directly in the page?  Seems that 95% of users won't
>     really be interested.  (And I've still got this half-hearted thing
>     about munging addresses.)

I think we should keep them, but I can munge them. Any suggestions
on what works best?

>   - Put L<>'s in the TOC to make it easier for people to find links.

Good idea.
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Robert Spier | 4 Jan 2006 07:50
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Re: Changes to perlfaq.pod intro

> > Minor comments:
> > 
> >   - Lets take $Date: $ out of the DESCRIPTION.  That often gets used
> >     for TITLEs and stuff in HTML transitions, and will look ugly.
> 
> Fine. I never really liked that. I can move it down to the bottom near
> the AUTHORS section.

Cool.

> >   - Do we really need to put list email gaddresses and contribution
> >     information directly in the page?  Seems that 95% of users won't
> >     really be interested.  (And I've still got this half-hearted thing
> >     about munging addresses.)
> 
> I think we should keep them, but I can munge them. Any suggestions
> on what works best?

Probably something simple like "email-address at host.dom".  We also
sometimes use delimiters like "email-address[at]host.dom".

-R
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Steffen Mueller | 4 Jan 2006 10:00
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Re: Changes to perlfaq.pod intro

brian d foy wrote:
>>  - Do we really need to put list email gaddresses and contribution
>>    information directly in the page?  Seems that 95% of users won't
>>    really be interested.  (And I've still got this half-hearted thing
>>    about munging addresses.)
> 
> I think we should keep them, but I can munge them. Any suggestions
> on what works best?

address at domain dot tld

worked fine for me. To make it clearer that "at" and "dot" are 
characters, one could use delimiters as Robert suggested.

Steffen
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Nicholas Clark | 6 Jan 2006 17:15

Re: Changes to perlfaq.pod intro

On Wed, Jan 04, 2006 at 10:00:53AM +0100, Steffen Mueller wrote:
> brian d foy wrote:
> >> - Do we really need to put list email gaddresses and contribution
> >>   information directly in the page?  Seems that 95% of users won't
> >>   really be interested.  (And I've still got this half-hearted thing
> >>   about munging addresses.)
> >
> >I think we should keep them, but I can munge them. Any suggestions
> >on what works best?
> 
> address at domain dot tld
> 
> worked fine for me. To make it clearer that "at" and "dot" are 
> characters, one could use delimiters as Robert suggested.

=head2 I am a spammer; how do I send mail to all the addresses in these documents?

The first task is to remove the obfuscation. For this, Perl's regexps are
ideally suited. If the obfuscated address is in C<$addr>

   s/\s*\[at\]\s*/\ <at> /g;
   s/\s*\[dot\]\s*/./g;

will convert them to the correct format. You can de-duplicate the addresses
with code such as this:

   my %seen = ();
   my  <at> unique = grep { ! $seen{ $_ }++ }  <at> array;

Then pass the list to your favourite spamming software. If instead you wish to
(Continue reading)

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Dave Cross | 6 Jan 2006 20:01
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Re: Changes to perlfaq.pod intro

Nicholas Clark wrote:
>
> =head2 I am a spammer; how do I send mail to all the addresses in these documents?
> 
> The first task is to remove the obfuscation. For this, Perl's regexps are
> ideally suited. If the obfuscated address is in C<$addr>
> 
>    s/\s*\[at\]\s*/\ <at> /g;
>    s/\s*\[dot\]\s*/./g;

[ snip ]

> =cut
> 
> Maybe we don't add that A to the FAQ. :-)

Maybe we do. You code appears to do nothing useful to $addr :)

Dave...
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brian d foy | 29 Jan 2006 06:00
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perlfaq5: How can I make a filehandle local to a subroutine?


* This is a partial diff. I cleaned up a lot of whitespace issues.

* In this answer, I show an example of storing a filehandle reference
in a container and then using that with print.

-=head2 How can I make a filehandle local to a subroutine?  How do I
pass filehandles between subroutines?  How do I make an array of
filehandles?
+=head2 How can I make a filehandle local to a subroutine?  How do I
pass filehandles between subroutines?  How do I make an array of
filehandles? 
 X<filehandle, local> X<filehandle, passing> X<filehandle, reference>

 As of perl5.6, open() autovivifies file and directory handles
 <at>  <at>  -228,6 +231,19  <at>  <at> 

   process_file( $fh );

+If you like, you can store these filehandles in an array or a hash.
+If you access them directly, they aren't simple scalars and you
+need to give C<print> a little help by placing the filehandle 
+reference in braces. Perl can only figure it out on its own when
+the filehandle reference is a simple scalar.
+
+  my  <at> fhs = ( $fh1, $fh2, $fh3 );
+  
+  for( $i = 0; $i <= $#fhs; $i++ ) {
+     print {$fhs[$i]} "just another Perl answer, \n";
+     }
(Continue reading)

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brian d foy | 29 Jan 2006 05:41
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perlfaq3: How do I debug my Perl programs?


* I completely rewrote the answer to have a friendly tone and actually
answer the question. :)

Index: perlfaq3.pod
===================================================================
RCS file: /cvs/public/perlfaq/perlfaq3.pod,v
retrieving revision 1.56
diff -d -u -r1.56 perlfaq3.pod
--- perlfaq3.pod  31 Dec 2005 00:54:37 -0000 1.56
+++ perlfaq3.pod  29 Jan 2006 04:39:47 -0000
 <at>  <at>  -110,28 +110,36  <at>  <at> 

 =head2 How do I debug my Perl programs?

-Have you tried C<use warnings> or used C<-w>?  They enable warnings
-to detect dubious practices.
+(contributed by brian d foy)

-Have you tried C<use strict>?  It prevents you from using symbolic
-references, makes you predeclare any subroutines that you call as bare
-words, and (probably most importantly) forces you to predeclare your
-variables with C<my>, C<our>, or C<use vars>.
+Before you do anything else, you can help yourself by ensuring that
+you let Perl tell you about problem areas in your code. By turning
+on warnings and strictures, you can head off many problems before 
+they get too big. You can find out more about these in L<strict>
+and L<warnings>.

-Did you check the return values of each and every system call?  The
(Continue reading)

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Sébastien Aperghis-Tramoni | 29 Jan 2006 22:01
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Re: perlfaq3: How do I debug my Perl programs?

brian d foy wrote:

> * I completely rewrote the answer to have a friendly tone and actually
> answer the question. :)
[...]
> +Perl comes with an interactive debugger, which you can start with the
> +C<-d> switch. It's fully explained in L<perldebug>.
> +
> +If you'd like a graphical user interface and you have Tk, you can use
> +C<ptkdb>. It's on CPAN and available for free.
> +
> +You can also use a commercial debugger such as Affrus (Mac OS X),
> Komodo
> +from Activestate (Windows and Mac OS X), or EPIC (most platforms).

Did I miss something or is Leon Brocard's very good Devel::ebug
not mentionned?

--
Sébastien Aperghis-Tramoni

Close the world, txEn eht nepO.
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brian d foy | 30 Jan 2006 20:31
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Re: perlfaq3: How do I debug my Perl programs?

In article <1138568500.43dd2d3495cb9 <at> imp6-g19.free.fr>, Sébastien
Aperghis-Tramoni <maddingue <at> free.fr> wrote:

> brian d foy wrote:
> 
> > * I completely rewrote the answer to have a friendly tone and actually
> > answer the question. :)

> Did I miss something or is Leon Brocard's very good Devel::ebug
> not mentionned?

No, I missed something. I should add that to the answer.  Thanks,
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Gmane