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Perl-Users Digest, Issue: 3523 Volume: 11

daemon@ATHENA.MIT.EDU (Perl-Users Digest)
Wed Oct 19 16:09:53 2011

Date: Wed, 19 Oct 2011 13:09:37 -0700 (PDT)
From: Perl-Users Digest <Perl-Users-Request@ruby.OCE.ORST.EDU>
To: Perl-Users@ruby.OCE.ORST.EDU (Perl-Users Digest)

Perl-Users Digest           Wed, 19 Oct 2011     Volume: 11 Number: 3523

Today's topics:
    Re: File Rotation <bugbear@trim_papermule.co.uk_trim>
    Re: File Rotation <ben@morrow.me.uk>
    Re: File Rotation <bugbear@trim_papermule.co.uk_trim>
    Re: File Rotation <ben@morrow.me.uk>
        File::Copy::copy With File Handles <hsomob1999@yahoo.com>
    Re: File::Copy::copy With File Handles <ben@morrow.me.uk>
    Re: File::Copy::copy With File Handles <hsomob1999@yahoo.com>
    Re: help with pipe dihedral88888@googlemail.com
        Imager module to resize a GIF <jwcarlton@gmail.com>
    Re: Imager module to resize a GIF <ben@morrow.me.uk>
        Posting Guidelines for comp.lang.perl.misc ($Revision:  tadmc@seesig.invalid
        search counterpart to sort? <bugbear@trim_papermule.co.uk_trim>
    Re: search counterpart to sort? <jurgenex@hotmail.com>
        we also want to do... <r@thevoid1.net>
        Digest Administrivia (Last modified: 6 Apr 01) (Perl-Users-Digest Admin)

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

Date: Mon, 17 Oct 2011 15:28:59 +0100
From: bugbear <bugbear@trim_papermule.co.uk_trim>
Subject: Re: File Rotation
Message-Id: <_ICdnd-7jNQ2pgHTnZ2dnUVZ7sWdnZ2d@brightview.co.uk>

1dg618 wrote:
> On Oct 16, 11:26 am, 1dg618<1dg...@gmail.com>  wrote:
>> On Oct 16, 11:10 am, Henry Law<n...@lawshouse.org>  wrote:
>>
>>
>>
>>
>>
>>> On 16/10/11 15:43, 1dg618 wrote:
>>
>>>> Is there a way to rotate the log files each time the process runs
>>>> using the existing functionality via the configuration? If the process
>>>> has issues, the most recent log file logged the information. I can't
>>>> find a way, but, I assume, others have found a way?
>>
>>> Newsgroups these days are infested with posts which contain
>>> randomly-chosen words which mean nothing.  I thought this was one of
>>> them initially but maybe it isn't.
>>
>>> Mr/Ms 1dg618 (May I call you "One d" for short?) for us to help you're
>>> going to need to be much more precise about what you're trying to do and
>>> what's not happening the way you want it to.
>>
>>> For a start, Perl programs (this is a Perl group) don't write log files
>>> unless you tell them to.  Once they're written they're the property of
>>> the operating system, which may provide log-rotation functionality (UNIX
>>> does, for example).
>>
>>> And when you say "the existing functionality via the configuration",
>>> which functionality and which configuration?  (And of what?)
>>
>>> CPAN contains many modules which have "log file" in their descriptive
>>> text.  It's possible that one of those may do exactly what you want, but
>>> until you make clear what it is that you want we can't help you further.
>>
>>> --
>>
>>> Henry Law            Manchester, England
>>
>> Sorry, using Log4Perl. I'll look for a Log4Perl user group.- Hide quoted text -
>>
>> - Show quoted text -
>
> My Log4Perl configuration rotates the log files daily. Using the
> DatePattern I can get that down to minutes. How do you get the log
> files to rotate everytime the process runs? Is there a way to do it in
> Log4Perl?
>
> my $log_conf = q/
>      log4perl.category = INFO, Logfile
>      log4perl.appender.Logfile=Log::Dispatch::FileRotate
>      log4perl.appender.Logfile.max=10
>      log4perl.appender.Logfile.mode=append
>      log4perl.appender.Logfile.filename=sub { return get_log_fn(); }
>      log4perl.appender.Logfile.DatePattern=yyyy-MM-dd
>      log4perl.appender.Logfile.TZ=CST
>
> log4perl.appender.Logfile.layout=Log::Log4perl::Layout::PatternLayout
>      log4perl.appender.Logfile.layout.ConversionPattern=%d %M %L>  %p -
> %m%n
> /;
>
> Otherwise, I'll have to use Herny's suggestion and write my own code
> to do it.

If you just want a log file for each run (process id) you could use
Log::Log4perl::Appender::File and set the filename to $$.log or similar.

  BugBear


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

Date: Mon, 17 Oct 2011 18:56:29 -0500
From: Ben Morrow <ben@morrow.me.uk>
Subject: Re: File Rotation
Message-Id: <pqadnZRWdrMwXQHTnZ2dnUVZ7ridnZ2d@bt.com>


Quoth bugbear <bugbear@trim_papermule.co.uk_trim>:
> 1dg618 wrote:
> >
> > My Log4Perl configuration rotates the log files daily. Using the
> > DatePattern I can get that down to minutes. How do you get the log
> > files to rotate everytime the process runs? Is there a way to do it in
> > Log4Perl?
> >
> > my $log_conf = q/
> >      log4perl.category = INFO, Logfile
> >      log4perl.appender.Logfile=Log::Dispatch::FileRotate
> >      log4perl.appender.Logfile.max=10
> >      log4perl.appender.Logfile.mode=append
> >      log4perl.appender.Logfile.filename=sub { return get_log_fn(); }
> >      log4perl.appender.Logfile.DatePattern=yyyy-MM-dd
> >      log4perl.appender.Logfile.TZ=CST
> >
> > log4perl.appender.Logfile.layout=Log::Log4perl::Layout::PatternLayout
> >      log4perl.appender.Logfile.layout.ConversionPattern=%d %M %L>  %p -
> > %m%n
> > /;
> >
> > Otherwise, I'll have to use Herny's suggestion and write my own code
> > to do it.
> 
> If you just want a log file for each run (process id) you could use
> Log::Log4perl::Appender::File and set the filename to $$.log or similar.

Process ids are not unique once your process has exitted. If you want a
guaranteed unique name you need "$$." . time() followed by sleeping for a
second, but names like that aren't exactly human-friendly. There are
other forms of name that are reliably unique, such as UUIDs (if you
generate them right), but none are terribly pretty.

If you can rely on O_EXCL working properly you can simply start at 0.log
and keep opening files with O_EXCL (and *without* O_CREAT) until you get
one that succeeds. Once you've 'claimed' that filename you can even
close the file and let Log4Perl reopen it, though it would probably be
easier to just pass the handle to Log::Dispatch::Handle.

If you can't the problem isn't soluble in general, without races, unless
you use guaranteed-unique names like those above. Neither readdir nor
stat are helpful for deciding if a filename has already been used since
there's a race between checking and creating. Locking doesn't help since
you need other instances to leave your logfile alone even after you've
exitted. The best you can do is have every instance lock a single
(permanently empty) lockfile while it pokes about deciding on a
filename, which is terribly hard work.

Ben



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

Date: Tue, 18 Oct 2011 10:00:54 +0100
From: bugbear <bugbear@trim_papermule.co.uk_trim>
Subject: Re: File Rotation
Message-Id: <FqqdnUcmasna3QDTnZ2dnUVZ7r-dnZ2d@brightview.co.uk>

Ben Morrow wrote:
>
> Quoth bugbear<bugbear@trim_papermule.co.uk_trim>:
>> 1dg618 wrote:
>>>
>>> My Log4Perl configuration rotates the log files daily. Using the
>>> DatePattern I can get that down to minutes. How do you get the log
>>> files to rotate everytime the process runs? Is there a way to do it in
>>> Log4Perl?
>>>
>>> my $log_conf = q/
>>>       log4perl.category = INFO, Logfile
>>>       log4perl.appender.Logfile=Log::Dispatch::FileRotate
>>>       log4perl.appender.Logfile.max=10
>>>       log4perl.appender.Logfile.mode=append
>>>       log4perl.appender.Logfile.filename=sub { return get_log_fn(); }
>>>       log4perl.appender.Logfile.DatePattern=yyyy-MM-dd
>>>       log4perl.appender.Logfile.TZ=CST
>>>
>>> log4perl.appender.Logfile.layout=Log::Log4perl::Layout::PatternLayout
>>>       log4perl.appender.Logfile.layout.ConversionPattern=%d %M %L>   %p -
>>> %m%n
>>> /;
>>>
>>> Otherwise, I'll have to use Herny's suggestion and write my own code
>>> to do it.
>>
>> If you just want a log file for each run (process id) you could use
>> Log::Log4perl::Appender::File and set the filename to $$.log or similar.
>
> Process ids are not unique once your process has exitted.

Good point.

> If you want a
> guaranteed unique name you need "$$." . time() followed by sleeping for a
> second, but names like that aren't exactly human-friendly.

Ah - or use hires time, and a short sleep?

Or (if you're that way inclined) just stick a random number on.

That would make a clash "unlikely"

This is a debugging requiremnt, not real time unattended medical software,
so "gold plated" functionality isn't needed.

   BugBear


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

Date: Tue, 18 Oct 2011 11:31:09 -0500
From: Ben Morrow <ben@morrow.me.uk>
Subject: Re: File Rotation
Message-Id: <6_OdnapVg4ZQNADTnZ2dnUVZ8lCdnZ2d@bt.com>


Quoth bugbear <bugbear@trim_papermule.co.uk_trim>:
> Ben Morrow wrote:
> >
> > Process ids are not unique once your process has exitted.
> 
> Good point.
> 
> > If you want a
> > guaranteed unique name you need "$$." . time() followed by sleeping for a
> > second, but names like that aren't exactly human-friendly.
> 
> Ah - or use hires time, and a short sleep?

Yes, though that's making the already-nasty name even longer. Strictly
speaking you don't have to sleep for a second either, you just have to
make sure your process doesn't exit for at least a second. In perl you
could do something like

    my $stamp = $^T;
    sleep 1 unless time() - $^T > 1; 

> Or (if you're that way inclined) just stick a random number on.
> 
> That would make a clash "unlikely"
> 
> This is a debugging requiremnt, not real time unattended medical software,
> so "gold plated" functionality isn't needed.

Yes, you can get good-enough-from-now-until-the-end-of-the-Universe
uniqueness with a surprisingly little amount of decent randomness.
(That's what secure checksums are based on, after all.) It's still worth
being careful and using O_CREAT|O_EXCL, though, just because you *know*
the one time it goes wrong will be the log you really needed to see...

(My previous post had an error: you *must* use O_CREAT, not must not.)

Ben



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

Date: Tue, 18 Oct 2011 13:08:47 -0700 (PDT)
From: MaggotChild <hsomob1999@yahoo.com>
Subject: File::Copy::copy With File Handles
Message-Id: <965453fe-a869-4576-a599-251533712299@27g2000prq.googlegroups.com>

The documentation for File::Copy warns against using file handles as
arguments:

       Note that passing in files as handles instead of names may lead
to
       loss of information on some operating systems; it is
recommended
       that you use file names whenever possible.

Does this refer to handles created with the older FileHandle module
(which is used in the module's synopsis), IO::Handle subclasses, or
both?

In either case what's the issue with handles that may lead to data
loss?


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

Date: Tue, 18 Oct 2011 16:39:54 -0500
From: Ben Morrow <ben@morrow.me.uk>
Subject: Re: File::Copy::copy With File Handles
Message-Id: <kuadna6P9Iy3bwDTnZ2dnUVZ8i6dnZ2d@bt.com>


Quoth MaggotChild <hsomob1999@yahoo.com>:
> The documentation for File::Copy warns against using file handles as
> arguments:
> 
>        Note that passing in files as handles instead of names may lead
> to
>        loss of information on some operating systems; it is
> recommended
>        that you use file names whenever possible.
> 
> Does this refer to handles created with the older FileHandle module
> (which is used in the module's synopsis), IO::Handle subclasses, or
> both?

Both, or indeed any other way of creating a filehandle.

> In either case what's the issue with handles that may lead to data
> loss?

On non-Unix systems (more specifically, on Win32 and I believe VMS)
File::Copy calls the system file-copy routine (CopyFile on Win32) if you
pass it filenames. This will preserve things like ACLs, extended
attributes, NTFS streams, and so on. If you pass it handles it can't do
that, so it only preserves the Unixy permission bits you get from stat.

Ben



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

Date: Wed, 19 Oct 2011 10:19:57 -0700 (PDT)
From: MaggotChild <hsomob1999@yahoo.com>
Subject: Re: File::Copy::copy With File Handles
Message-Id: <b14dfad7-201b-4f3e-ba45-022a07d8e10c@p27g2000prp.googlegroups.com>

On Oct 18, 2:39=A0pm, Ben Morrow <b...@morrow.me.uk> wrote:
> Quoth MaggotChild <hsomob1...@yahoo.com>:
>
> > The documentation for File::Copy warns against using file handles as
> > arguments:
>
> > =A0 =A0 =A0 =A0Note that passing in files as handles instead of names m=
ay lead
> >        to loss of information

> On non-Unix systems (more specifically, on Win32 and I believe VMS)
> File::Copy calls the system file-copy routine (CopyFile on Win32) if you
> pass it filenames. This will preserve things like ACLs, extended
> attributes, NTFS streams, and so on.

I had ignored the obvious and interpreted "loss of information" to
mean loss of the file's data, not necessarily metadata. Which lead to
me to believe that for some subtle reason File::Copy couldn't be used
reliably copy data streams. Thanks for the clarification.




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

Date: Mon, 17 Oct 2011 07:12:01 -0700 (PDT)
From: dihedral88888@googlemail.com
Subject: Re: help with pipe
Message-Id: <22925238.1535.1318860721937.JavaMail.geo-discussion-forums@prng5>

I am wondering if the compression zlib in python could be upgraded to the  iterable input and output for different compression algorithm experiments that will outperform the speed of pipelines for all i/o of big chunks.

This is my suggestion. Maybe this is good for talented young to try to gain insights in python modules by just improving an existed one.


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

Date: Tue, 18 Oct 2011 22:58:34 -0700 (PDT)
From: Jason C <jwcarlton@gmail.com>
Subject: Imager module to resize a GIF
Message-Id: <3578932.997.1319003914911.JavaMail.geo-discussion-forums@yqja14>

I have a web script that resizes images uploaded by the site visitor to predetermined dimensions. This works fine for JPG and PNG, but not for GIF.

I've just about copied the script verbatim from CPAN for testing, but getwidth(), etc, all return nothing:

#!/usr/bin/perl 
#
use CGI::Carp qw(fatalsToBrowser);
use Imager;
use strict;
use warnings;

my $img = Imager->new();
  $img->open(file=>'/home/myacct/www/myimage.gif', type=>'gif')
    or die "not read";

print "Content-type: text/html\n\n";

if (-e "/home/myacct/www/myimage.gif") {
  print "Image information:\n";
  print "  Width:  ". $img->getwidth()  ."\n";
  print "  Height: ". $img->getheight() ."\n";
  print "  Type:   ". $img->type()      ."\n";
}

else { print "not found"; }
exit;

http://search.cpan.org/~tonyc/Imager-0.85/lib/Imager/ImageTypes.pod

It prints "Image information", etc, so the image is found... it's just not being read.

I do have giflib installed on the server. I wasn't sure if I installed it before or after Imager, though, so I uninstalled Imager and reinstalled it, but that had no impact.

If any of you are familiar with Imager, is there something else that I need to do in order to get it to recognize GIF files?


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

Date: Wed, 19 Oct 2011 07:20:50 -0500
From: Ben Morrow <ben@morrow.me.uk>
Subject: Re: Imager module to resize a GIF
Message-Id: <opidnS4sYKg_XQPTnZ2dnUVZ8tGdnZ2d@bt.com>


Quoth comp.lang.perl.misc@googlegroups.com:
> I have a web script that resizes images uploaded by the site visitor to
> predetermined dimensions. This works fine for JPG and PNG, but not for
> GIF.
> 
> I've just about copied the script verbatim from CPAN for testing, but
> getwidth(), etc, all return nothing:
> 
> #!/usr/bin/perl 
> #
> use CGI::Carp qw(fatalsToBrowser);
> use Imager;
> use strict;
> use warnings;
> 
> my $img = Imager->new();
>   $img->open(file=>'/home/myacct/www/myimage.gif', type=>'gif')
>     or die "not read";
> 
> print "Content-type: text/html\n\n";
> 
> if (-e "/home/myacct/www/myimage.gif") {
>   print "Image information:\n";
>   print "  Width:  ". $img->getwidth()  ."\n";
>   print "  Height: ". $img->getheight() ."\n";
>   print "  Type:   ". $img->type()      ."\n";
> }
> 
> else { print "not found"; }
> exit;
> 
> http://search.cpan.org/~tonyc/Imager-0.85/lib/Imager/ImageTypes.pod
> 
> It prints "Image information", etc, so the image is found... it's just
> not being read.
> 
> I do have giflib installed on the server. I wasn't sure if I installed
> it before or after Imager, though, so I uninstalled Imager and
> reinstalled it, but that had no impact.
> 
> If any of you are familiar with Imager, is there something else that I
> need to do in order to get it to recognize GIF files?

What you have there works for me, here. Do you, in fact, have a .pm and
a .so for Imager::File::GIF? If you run ldd against the .so (which
should be somewhere like /usr/local/lib/perl5/site_perl/5.12.4/
amd64-freebsd/auto/Imager/File/GIF/GIF.so) are all the libraries it
needs found?

Is there something wrong with your gif file? There is a file called
GIF/testimg/expected.gif in the Imager distribution; since that's the
file Imager uses to make sure giflib works, you could try that (it
should be 16x16px).

Ben



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

Date: Tue, 18 Oct 2011 02:27:36 -0500
From: tadmc@seesig.invalid
Subject: Posting Guidelines for comp.lang.perl.misc ($Revision: 1.9 $)
Message-Id: <4tudncgNj_b1twDTnZ2dnUVZ5sCdnZ2d@giganews.com>

Outline
   Before posting to comp.lang.perl.misc
      Must
       - Check the Perl Frequently Asked Questions (FAQ)
       - Check the other standard Perl docs (*.pod)
      Really Really Should
       - Lurk for a while before posting
       - Search a Usenet archive
      If You Like
       - Check Other Resources
   Posting to comp.lang.perl.misc
      Is there a better place to ask your question?
       - Question should be about Perl, not about the application area
      How to participate (post) in the clpmisc community
       - Carefully choose the contents of your Subject header
       - Use an effective followup style
       - Speak Perl rather than English, when possible
       - Ask perl to help you
       - Do not re-type Perl code
       - Provide enough information
       - Do not provide too much information
       - Do not post binaries, HTML, or MIME
      Social faux pas to avoid
       - Asking a Frequently Asked Question
       - Asking a question easily answered by a cursory doc search
       - Asking for emailed answers
       - Beware of saying "doesn't work"
       - Sending a "stealth" Cc copy
      Be extra cautious when you get upset
       - Count to ten before composing a followup when you are upset
       - Count to ten after composing and before posting when you are upset
-----------------------------------------------------------------

Posting Guidelines for comp.lang.perl.misc ($Revision: 1.9 $)
    This newsgroup, commonly called clpmisc, is a technical newsgroup
    intended to be used for discussion of Perl related issues (except job
    postings), whether it be comments or questions.

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        http://www.catb.org/~esr/faqs/smart-questions.html

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    This article describes things that you should, and should not, do to
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Before posting to comp.lang.perl.misc
  Must
    This section describes things that you *must* do before posting to
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    The perl distribution includes documentation that is copied to your hard
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        Checking the FAQ before posting is required in Big 8 newsgroups in
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    Try doing a word-search in the standard docs for some words/phrases
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  Really Really Should
    This section describes things that you *really should* do before posting
    to clpmisc.

    Lurk for a while before posting
        This is very important and expected in all newsgroups. Lurking means
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    Search a Usenet archive
        There are tens of thousands of Perl programmers. It is very likely
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        can find where it has already been answered.

        One such searchable archive is:

         http://groups.google.com/advanced_search

  If You Like
    This section describes things that you *can* do before posting to
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    Check Other Resources
        You may want to check in books or on web sites to see if you can
        find the answer to your question.

        But you need to consider the source of such information: there are a
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        too, of course.

Posting to comp.lang.perl.misc
    There can be 200 messages in clpmisc in a single day. Nobody is going to
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    Your post is in competition with 199 other posts. You need to "win"
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  Is there a better place to ask your question?
    Question should be about Perl, not about the application area
        It can be difficult to separate out where your problem really is,
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    Use an effective followup style
        When composing a followup, quote only enough text to establish the
        context for the comments that you will add. Always indicate who
        wrote the quoted material. Never quote an entire article. Never
        quote a .signature (unless that is what you are commenting on).

        Intersperse your comments *following* each section of quoted text to
        which they relate. Unappreciated followup styles are referred to as
        "top-posting", "Jeopardy" (because the answer comes before the
        question), or "TOFU" (Text Over, Fullquote Under).

        Reversing the chronology of the dialog makes it much harder to
        understand (some folks won't even read it if written in that style).
        For more information on quoting style, see:

         http://web.presby.edu/~nnqadmin/nnq/nquote.html

    Speak Perl rather than English, when possible
        Perl is much more precise than natural language. Saying it in Perl
        instead will avoid misunderstanding your question or problem.

        Do not say: I have variable with "foo\tbar" in it.

        Instead say: I have $var = "foo\tbar", or I have $var = 'foo\tbar',
        or I have $var = <DATA> (and show the data line).

    Ask perl to help you
        You can ask perl itself to help you find common programming mistakes
        by doing two things: enable warnings (perldoc warnings) and enable
        "strict"ures (perldoc strict).

        You should not bother the hundreds/thousands of readers of the
        newsgroup without first seeing if a machine can help you find your
        problem. It is demeaning to be asked to do the work of a machine. It
        will annoy the readers of your article.

        You can look up any of the messages that perl might issue to find
        out what the message means and how to resolve the potential mistake
        (perldoc perldiag). If you would like perl to look them up for you,
        you can put "use diagnostics;" near the top of your program.

    Do not re-type Perl code
        Use copy/paste or your editor's "import" function rather than
        attempting to type in your code. If you make a typo you will get
        followups about your typos instead of about the question you are
        trying to get answered.

    Provide enough information
        If you do the things in this item, you will have an Extremely Good
        chance of getting people to try and help you with your problem!
        These features are a really big bonus toward your question winning
        out over all of the other posts that you are competing with.

        First make a short (less than 20-30 lines) and *complete* program
        that illustrates the problem you are having. People should be able
        to run your program by copy/pasting the code from your article. (You
        will find that doing this step very often reveals your problem
        directly. Leading to an answer much more quickly and reliably than
        posting to Usenet.)

        Describe *precisely* the input to your program. Also provide example
        input data for your program. If you need to show file input, use the
        __DATA__ token (perldata.pod) to provide the file contents inside of
        your Perl program.

        Show the output (including the verbatim text of any messages) of
        your program.

        Describe how you want the output to be different from what you are
        getting.

        If you have no idea at all of how to code up your situation, be sure
        to at least describe the 2 things that you *do* know: input and
        desired output.

    Do not provide too much information
        Do not just post your entire program for debugging. Most especially
        do not post someone *else's* entire program.

    Do not post binaries, HTML, or MIME
        clpmisc is a text only newsgroup. If you have images or binaries
        that explain your question, put them in a publically accessible
        place (like a Web server) and provide a pointer to that location. If
        you include code, cut and paste it directly in the message body.
        Don't attach anything to the message. Don't post vcards or HTML.
        Many people (and even some Usenet servers) will automatically filter
        out such messages. Many people will not be able to easily read your
        post. Plain text is something everyone can read.

  Social faux pas to avoid
    The first two below are symptoms of lots of FAQ asking here in clpmisc.
    It happens so often that folks will assume that it is happening yet
    again. If you have looked but not found, or found but didn't understand
    the docs, say so in your article.

    Asking a Frequently Asked Question
        It should be understood that you may have missed the applicable FAQ
        when you checked, which is not a big deal. But if the Frequently
        Asked Question is worded similar to your question, folks will assume
        that you did not look at all. Don't become indignant at pointers to
        the FAQ, particularly if it solves your problem.

    Asking a question easily answered by a cursory doc search
        If folks think you have not even tried the obvious step of reading
        the docs applicable to your problem, they are likely to become
        annoyed.

        If you are flamed for not checking when you *did* check, then just
        shrug it off (and take the answer that you got).

    Asking for emailed answers
        Emailed answers benefit one person. Posted answers benefit the
        entire community. If folks can take the time to answer your
        question, then you can take the time to go get the answer in the
        same place where you asked the question.

        It is OK to ask for a *copy* of the answer to be emailed, but many
        will ignore such requests anyway. If you munge your address, you
        should never expect (or ask) to get email in response to a Usenet
        post.

        Ask the question here, get the answer here (maybe).

    Beware of saying "doesn't work"
        This is a "red flag" phrase. If you find yourself writing that,
        pause and see if you can't describe what is not working without
        saying "doesn't work". That is, describe how it is not what you
        want.

    Sending a "stealth" Cc copy
        A "stealth Cc" is when you both email and post a reply without
        indicating *in the body* that you are doing so.

  Be extra cautious when you get upset
    Count to ten before composing a followup when you are upset
        This is recommended in all Usenet newsgroups. Here in clpmisc, most
        flaming sub-threads are not about any feature of Perl at all! They
        are most often for what was seen as a breach of netiquette. If you
        have lurked for a bit, then you will know what is expected and won't
        make such posts in the first place.

        But if you get upset, wait a while before writing your followup. I
        recommend waiting at least 30 minutes.

    Count to ten after composing and before posting when you are upset
        After you have written your followup, wait *another* 30 minutes
        before committing yourself by posting it. You cannot take it back
        once it has been said.

AUTHOR
    Tad McClellan and many others on the comp.lang.perl.misc newsgroup.

-- 
Tad McClellan
email: perl -le "print scalar reverse qq/moc.liamg\100cm.j.dat/"
The above message is a Usenet post.
I don't recall having given anyone permission to use it on a Web site.


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

Date: Tue, 18 Oct 2011 11:03:37 +0100
From: bugbear <bugbear@trim_papermule.co.uk_trim>
Subject: search counterpart to sort?
Message-Id: <QuudnQP375hk0wDTnZ2dnUVZ7r6dnZ2d@brightview.co.uk>

Perl (for ages) has had a helpful sort function
built in, based on a comparison subroutine.

Is there a corresponding  search function, either as core,
or a commonly available module?

I've looked around, but come up empty, which I
find surprising.

And, yes, I could code binary search myself. ;-)

  BugBear



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

Date: Tue, 18 Oct 2011 03:13:58 -0700
From: Jürgen Exner <jurgenex@hotmail.com>
Subject: Re: search counterpart to sort?
Message-Id: <22kq97pirrdds3h007kr6nbevulskrknid@4ax.com>

bugbear <bugbear@trim_papermule.co.uk_trim> wrote:
>Perl (for ages) has had a helpful sort function
>built in, based on a comparison subroutine.
>
>Is there a corresponding  search function, either as core,
>or a commonly available module?

How about grep()? Just like sort() it takes a list and an
expression/block as arguments and returns a list which contains all the
sorted elements resp. all the 'found' elements.

jue


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

Date: Mon, 17 Oct 2011 18:32:02 -0600
From: robin <r@thevoid1.net>
Subject: we also want to do...
Message-Id: <j7ihe6$43f$1@speranza.aioe.org>

support the u.s. government suppive thereof protests.

:-)

sdfjklsdfjklsdcf
-r


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

Date: 6 Apr 2001 21:33:47 GMT (Last modified)
From: Perl-Users-Request@ruby.oce.orst.edu (Perl-Users-Digest Admin) 
Subject: Digest Administrivia (Last modified: 6 Apr 01)
Message-Id: <null>


Administrivia:

To submit articles to comp.lang.perl.announce, send your article to
clpa@perl.com.

Back issues are available via anonymous ftp from
ftp://cil-www.oce.orst.edu/pub/perl/old-digests. 

#For other requests pertaining to the digest, send mail to
#perl-users-request@ruby.oce.orst.edu. Do not waste your time or mine
#sending perl questions to the -request address, I don't have time to
#answer them even if I did know the answer.


------------------------------
End of Perl-Users Digest V11 Issue 3523
***************************************


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