From arocker at vex.net  Tue Jun  8 12:23:26 2010
From: arocker at vex.net (arocker at vex.net)
Date: Tue, 8 Jun 2010 15:23:26 -0400
Subject: [tpm] Dependency chains
Message-ID: <5d4ad4536d1e11f4da5606d16b367042.squirrel@webmail.vex.net>


Is there any way to check the dependency chain of a CPAN module against an
installed configuration in advance of an attempt to install?

It would be so much more agreeable to start from the bottom and work
upwards, in a series of successes, than to work down through a succession
of aborts and then back up, (especially when some of the dependencies
appear to be mutual).


From fulko.hew at gmail.com  Tue Jun  8 12:26:59 2010
From: fulko.hew at gmail.com (Fulko Hew)
Date: Tue, 8 Jun 2010 15:26:59 -0400
Subject: [tpm] Dependency chains
In-Reply-To: <5d4ad4536d1e11f4da5606d16b367042.squirrel@webmail.vex.net>
References: <5d4ad4536d1e11f4da5606d16b367042.squirrel@webmail.vex.net>
Message-ID: <AANLkTimivJf9RFK7663ZKzzd8ut8G-8vEHtnbgrDWZVz@mail.gmail.com>

On Tue, Jun 8, 2010 at 3:23 PM, <arocker at vex.net> wrote:

> Is there any way to check the dependency chain of a CPAN module against an
> installed configuration in advance of an attempt to install?
>
> It would be so much more agreeable to start from the bottom and work
> upwards, in a series of successes, than to work down through a succession
> of aborts and then back up, (especially when some of the dependencies
> appear to be mutual).

I haven't tried it, but because I was looking for other 'module' related
stuff this
morning I saw:

CPAN::FindDependencies

http://search.cpan.org/~dcantrell/CPAN-FindDependencies-2.34/lib/CPAN/FindDependencies.pm
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From dave.s.doyle at gmail.com  Tue Jun  8 12:34:54 2010
From: dave.s.doyle at gmail.com (Dave Doyle)
Date: Tue, 8 Jun 2010 15:34:54 -0400
Subject: [tpm] Dependency chains
In-Reply-To: <AANLkTimivJf9RFK7663ZKzzd8ut8G-8vEHtnbgrDWZVz@mail.gmail.com>
References: <5d4ad4536d1e11f4da5606d16b367042.squirrel@webmail.vex.net>
	<AANLkTimivJf9RFK7663ZKzzd8ut8G-8vEHtnbgrDWZVz@mail.gmail.com>
Message-ID: <AANLkTil87O08pKf6CXcqS6XNCZBFkl4KMKxMUqruJK2u@mail.gmail.com>

If you wish to do it while browsing instead of programmaticly you can just
do a search on search.cpan.org and look at the POD of the module. Beneath
the author photo, and download link in the upper right there's a
"Dependencies" link that gets you a nifty page like this:

http://deps.cpantesters.org/?module=Params::Validate;perl=latest

(including test stats)
--
dave.s.doyle at gmail.com


On Tue, Jun 8, 2010 at 3:26 PM, Fulko Hew <fulko.hew at gmail.com> wrote:

>
> On Tue, Jun 8, 2010 at 3:23 PM, <arocker at vex.net> wrote:
>
> > Is there any way to check the dependency chain of a CPAN module against
> an
> > installed configuration in advance of an attempt to install?
> >
> > It would be so much more agreeable to start from the bottom and work
> > upwards, in a series of successes, than to work down through a succession
> > of aborts and then back up, (especially when some of the dependencies
> > appear to be mutual).
>
> I haven't tried it, but because I was looking for other 'module' related
> stuff this
> morning I saw:
>
> CPAN::FindDependencies
>
>
> http://search.cpan.org/~dcantrell/CPAN-FindDependencies-2.34/lib/CPAN/FindDependencies.pm
>
>
>
> _______________________________________________
> toronto-pm mailing list
> toronto-pm at pm.org
> http://mail.pm.org/mailman/listinfo/toronto-pm
>
>
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From steve at ipv6canada.com  Tue Jun  8 15:19:04 2010
From: steve at ipv6canada.com (Steve Bertrand)
Date: Tue, 08 Jun 2010 18:19:04 -0400
Subject: [tpm] Introduction
Message-ID: <4C0EC1D8.3020806@ipv6canada.com>

Hi all,

I just found this list a few days ago after doing some research based on
a comment regarding Boston PM by Uri over on the -beginners list.

I live in Port Hope (an hour east of Toronto), and work 10km east of
that in Cobourg.

My Perl development began about 10 years ago creating small
automation/maintenance scripts for an ISP network, and a bunch of
FreeBSD servers.

Currently, I'm working on a few very large and elaborate application
systems, the primary being an ISP management, user-based-billing and
accounting system (amongst other things).

I'm hoping to get involved face-to-face with people in the Perl
community now that more of my time is spent writing production-quality code.

Cheers!

Steve

-- 
Steve Bertrand
Senior Network Manager
eagle.ca Internet Services
p: 905.373.9313
c: 905.269.0453

IPv6 enabled since March, 2008!

From arocker at vex.net  Wed Jun  9 07:43:20 2010
From: arocker at vex.net (arocker at vex.net)
Date: Wed, 9 Jun 2010 10:43:20 -0400
Subject: [tpm] Dependency chains
In-Reply-To: <AANLkTimivJf9RFK7663ZKzzd8ut8G-8vEHtnbgrDWZVz@mail.gmail.com>
References: <5d4ad4536d1e11f4da5606d16b367042.squirrel@webmail.vex.net>
	<AANLkTimivJf9RFK7663ZKzzd8ut8G-8vEHtnbgrDWZVz@mail.gmail.com>
Message-ID: <177f759ba625320a68d1c53e53e33705.squirrel@webmail.vex.net>

>
> CPAN::FindDependencies
>
> http://search.cpan.org/~dcantrell/CPAN-FindDependencies-2.34/lib/CPAN/FindDependencies.pm
>
Thanks. Fulko. Unfortunately, we seem to have a recursive problem here.
That module's list of dependencies is rather longer than the modules' that
I'm trying to investigate. :-(*


From arocker at vex.net  Wed Jun  9 12:51:05 2010
From: arocker at vex.net (arocker at vex.net)
Date: Wed, 9 Jun 2010 15:51:05 -0400
Subject: [tpm] [Fwd: Re:  Dependency chains]
Message-ID: <69edba95297928fdc4e3806c07b85f38.squirrel@webmail.vex.net>

>>
> Have you checked out Module::ScanDeps?
>

I've just taken a look at it, and I see 2 problems.

The first is that it is at the wrong end of the pipeline; it's for people
who have code locally, for which they want to establish the dependencies
before transferring.

The second, fatal, problem, is that it has a fairly hefty list of
dependencies of its own, many of which are the very modules that sent me
down this particular rabbit-hole in the first place.



From arocker at vex.net  Wed Jun  9 14:28:20 2010
From: arocker at vex.net (arocker at vex.net)
Date: Wed, 9 Jun 2010 17:28:20 -0400
Subject: [tpm] Introduction
In-Reply-To: <4C0EC1D8.3020806@ipv6canada.com>
References: <4C0EC1D8.3020806@ipv6canada.com>
Message-ID: <ac532189e6a87d24f3be0e20651c555d.squirrel@webmail.vex.net>

>
> I'm hoping to get involved face-to-face with people in the Perl
> community now that more of my time is spent writing production-quality
> code.
>
Welcome to TPM.

We're always happy to see new faces, especially from lovely, radioactive,
Port Hope.


From legrady at gmail.com  Wed Jun  9 15:39:32 2010
From: legrady at gmail.com (Tom Legrady)
Date: Wed, 9 Jun 2010 18:39:32 -0400
Subject: [tpm] Introduction
In-Reply-To: <ac532189e6a87d24f3be0e20651c555d.squirrel@webmail.vex.net>
References: <4C0EC1D8.3020806@ipv6canada.com>
	<ac532189e6a87d24f3be0e20651c555d.squirrel@webmail.vex.net>
Message-ID: <AANLkTinEjY0S--KHaGT4T407UzWECHi7uLWakC4hUp_o@mail.gmail.com>

You're just mis-interpreting a healthy glow, Alan

On Wed, Jun 9, 2010 at 5:28 PM, <arocker at vex.net> wrote:

> >
> > I'm hoping to get involved face-to-face with people in the Perl
> > community now that more of my time is spent writing production-quality
> > code.
> >
> Welcome to TPM.
>
> We're always happy to see new faces, especially from lovely, radioactive,
> Port Hope.
>
> _______________________________________________
> toronto-pm mailing list
> toronto-pm at pm.org
> http://mail.pm.org/mailman/listinfo/toronto-pm
>
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From steve at ipv6canada.com  Wed Jun  9 17:07:30 2010
From: steve at ipv6canada.com (Steve Bertrand)
Date: Wed, 09 Jun 2010 20:07:30 -0400
Subject: [tpm] Introduction
In-Reply-To: <ac532189e6a87d24f3be0e20651c555d.squirrel@webmail.vex.net>
References: <4C0EC1D8.3020806@ipv6canada.com>
	<ac532189e6a87d24f3be0e20651c555d.squirrel@webmail.vex.net>
Message-ID: <4C102CC2.6040402@ipv6canada.com>

On 2010.06.09 17:28, arocker at vex.net wrote:
>>
>> I'm hoping to get involved face-to-face with people in the Perl
>> community now that more of my time is spent writing production-quality
>> code.
>>
> Welcome to TPM.
> 
> We're always happy to see new faces, especially from lovely, radioactive,
> Port Hope.

heh

My girl works as a Health and Safety Officer (CRSP) at the conversion
facility. I assure you that if I ever make it to a meeting, the glow
that I will light up the room with will be due to my endless love for
Perl, and not because of radiation.

...besides, the extra eye, and the two extra fingers that have grown
since I moved here allow me to write code, manage the bug system and
keep my POD up-to-date simultaneously, at an alarmingly fast rate :)

Cheers,

Steve

From thakore.kartik at gmail.com  Fri Jun 11 05:59:26 2010
From: thakore.kartik at gmail.com (Kartik Thakore)
Date: Fri, 11 Jun 2010 08:59:26 -0400
Subject: [tpm] Introduction
In-Reply-To: <4C0EC1D8.3020806@ipv6canada.com>
References: <4C0EC1D8.3020806@ipv6canada.com>
Message-ID: <0DFB5189-B80F-4A59-8F09-C944AEDA754E@gmail.com>

Welcome to Toronto PM.

Kartik Thakore

On 2010-06-08, at 6:19 PM, Steve Bertrand <steve at ipv6canada.com> wrote:

> Hi all,
>
> I just found this list a few days ago after doing some research  
> based on
> a comment regarding Boston PM by Uri over on the -beginners list.
>
> I live in Port Hope (an hour east of Toronto), and work 10km east of
> that in Cobourg.
>
> My Perl development began about 10 years ago creating small
> automation/maintenance scripts for an ISP network, and a bunch of
> FreeBSD servers.
>
> Currently, I'm working on a few very large and elaborate application
> systems, the primary being an ISP management, user-based-billing and
> accounting system (amongst other things).
>
> I'm hoping to get involved face-to-face with people in the Perl
> community now that more of my time is spent writing production- 
> quality code.
>
> Cheers!
>
> Steve
>
> -- 
> Steve Bertrand
> Senior Network Manager
> eagle.ca Internet Services
> p: 905.373.9313
> c: 905.269.0453
>
> IPv6 enabled since March, 2008!
> _______________________________________________
> toronto-pm mailing list
> toronto-pm at pm.org
> http://mail.pm.org/mailman/listinfo/toronto-pm

From arocker at vex.net  Tue Jun 15 12:09:54 2010
From: arocker at vex.net (arocker at vex.net)
Date: Tue, 15 Jun 2010 15:09:54 -0400
Subject: [tpm] Driving to YAPC
Message-ID: <bfe5e8b3e932e2612c042e5d4ad52291.squirrel@webmail.vex.net>


Is anybody driving to YAPC with significant seating spare?


From jbl at jbldata.com  Wed Jun 16 14:15:29 2010
From: jbl at jbldata.com (J. Bobby Lopez)
Date: Wed, 16 Jun 2010 17:15:29 -0400
Subject: [tpm] Automatically generating HTML forms from perl data structures
Message-ID: <AANLkTinuGcrlSFwmAcfav096FAe435oKKieUkp-ZcXN6@mail.gmail.com>

Hey All,

I'm currently working on some tools which aim to read in JSON data into perl
data structures (with JSON::XS), and then automatically generate TT
templates for HTML forms, based on the data types of the elements within the
data structure.

So far I have working code, but I was curious if were more common ways of
doing this?  I've searched CPAN for similar modules, but haven't found any
so far.

Template Toolkit isn't necessary, but I figured I'd incorporate that early
since it makes dealing with HTML much less cumbersome.  The basic goal is to
be able to read JSON data and dynamically generate an HTML form (without
hard-coding any of the name/value elements), and then use that form to save
the data back to JSON format.

Experience with XML would likely be relevant here as well.

Thanks!

Bobby
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From uri at StemSystems.com  Wed Jun 16 14:25:07 2010
From: uri at StemSystems.com (Uri Guttman)
Date: Wed, 16 Jun 2010 17:25:07 -0400
Subject: [tpm] Automatically generating HTML forms from perl data
	structures
In-Reply-To: <AANLkTinuGcrlSFwmAcfav096FAe435oKKieUkp-ZcXN6@mail.gmail.com>
	(J. Bobby Lopez's message of "Wed\, 16 Jun 2010 17\:15\:29 -0400")
References: <AANLkTinuGcrlSFwmAcfav096FAe435oKKieUkp-ZcXN6@mail.gmail.com>
Message-ID: <87hbl26570.fsf@quad.sysarch.com>

>>>>> "JBL" == J Bobby Lopez <jbl at jbldata.com> writes:

  JBL> I'm currently working on some tools which aim to read in JSON
  JBL> data into perl data structures (with JSON::XS), and then
  JBL> automatically generate TT templates for HTML forms, based on the
  JBL> data types of the elements within the data structure.

  JBL> So far I have working code, but I was curious if were more common
  JBL> ways of doing this?? I've searched CPAN for similar modules, but
  JBL> haven't found any so far.

  JBL> Template Toolkit isn't necessary, but I figured I'd incorporate
  JBL> that early since it makes dealing with HTML much less
  JBL> cumbersome.? The basic goal is to be able to read JSON data and
  JBL> dynamically generate an HTML form (without hard-coding any of the
  JBL> name/value elements), and then use that form to save the data
  JBL> back to JSON format.

to make your life simpler, check out Template::Simple. it can do all the
template work you need but is much simpler (only 4 markups) and much
faster. what you can do is create smaller templates for each type of
data and then build up a larger template from them. then you can render
that with the json data. you can even use the module in a dual role. the
metatemplates would use a different delimiter than the field ones so you
can render both levels given the correct data trees. it really comes
down to how you want your html to look and such. if you can factor out
all common parts and meta parts then you can template it all.

uri

-- 
Uri Guttman  ------  uri at stemsystems.com  --------  http://www.sysarch.com --
-----  Perl Code Review , Architecture, Development, Training, Support ------
---------  Gourmet Hot Cocoa Mix  ----  http://bestfriendscocoa.com ---------

From adam.prime at utoronto.ca  Wed Jun 16 16:30:22 2010
From: adam.prime at utoronto.ca (Adam Prime)
Date: Wed, 16 Jun 2010 19:30:22 -0400
Subject: [tpm] Automatically generating HTML forms from perl data
	structures
In-Reply-To: <AANLkTinuGcrlSFwmAcfav096FAe435oKKieUkp-ZcXN6@mail.gmail.com>
References: <AANLkTinuGcrlSFwmAcfav096FAe435oKKieUkp-ZcXN6@mail.gmail.com>
Message-ID: <4C195E8E.9090203@utoronto.ca>

None of the Form generation stuff that i've seen is designed to take 
JSON and generate forms.  There are a bunch of form handling modules out 
there though, that do various stuff.  FormFu has the ability to generate 
forms based on yaml configuration files, which is somewhat similar to 
what you're doing.

I've used:

Rose::HTML::Form
HTML::FormFu

I haven't used, but i know people like:

HTML::FormHandler

There are other things out there too.

Adam

J. Bobby Lopez wrote:
> Hey All,
> 
> I'm currently working on some tools which aim to read in JSON data into 
> perl data structures (with JSON::XS), and then automatically generate TT 
> templates for HTML forms, based on the data types of the elements within 
> the data structure.
> 
> So far I have working code, but I was curious if were more common ways 
> of doing this?  I've searched CPAN for similar modules, but haven't 
> found any so far.
> 
> Template Toolkit isn't necessary, but I figured I'd incorporate that 
> early since it makes dealing with HTML much less cumbersome.  The basic 
> goal is to be able to read JSON data and dynamically generate an HTML 
> form (without hard-coding any of the name/value elements), and then use 
> that form to save the data back to JSON format.
> 
> Experience with XML would likely be relevant here as well.
> 
> Thanks!
> 
> Bobby
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> toronto-pm mailing list
> toronto-pm at pm.org
> http://mail.pm.org/mailman/listinfo/toronto-pm


From steve at ipv6canada.com  Wed Jun 16 17:16:49 2010
From: steve at ipv6canada.com (Steve Bertrand)
Date: Wed, 16 Jun 2010 20:16:49 -0400
Subject: [tpm] Driving to YAPC
In-Reply-To: <bfe5e8b3e932e2612c042e5d4ad52291.squirrel@webmail.vex.net>
References: <bfe5e8b3e932e2612c042e5d4ad52291.squirrel@webmail.vex.net>
Message-ID: <4C196971.8010909@ipv6canada.com>

On 2010.06.15 15:09, arocker at vex.net wrote:
> 
> Is anybody driving to YAPC with significant seating spare?

Where are you coming from? (I assume you're referring to Ohio yapc, yes?)

Steve

From mike at stok.ca  Fri Jun 18 16:10:02 2010
From: mike at stok.ca (Mike Stok)
Date: Fri, 18 Jun 2010 19:10:02 -0400
Subject: [tpm] Meeting - June 24, 18:45 Perl and phones
Message-ID: <7F815467-9807-4B0C-A2BC-2349E8C48ED7@stok.ca>

FOr all the Toronto Perl mongers who aren't en route from YAPC::NA...  And if you are going to YAPC::NA please consider volunteering for a few moments at the July meeting to share the YAPC goodness with the rest of us!

See http://to.pm.org for details.  When I have the room information I'll update the web site and resend the email.

Date: Thu 24 Jun 2010 18:45 EDT
Venue: Nexient
Topic: Perl and Phones (part II)
Synopsis:
This month we have Scott's talk on Perl on Android.

Scott Elcomb: Perl on Android

Location: 2 Bloor Street West, (usually) 8th or 16th floor. The room number will be announced on the mailing list a few days before the meeting. It will also be left with the security desk in the building (main floor lobby) shortly before the meeting starts (i.e. around 6pm).

Time: 6:45 p.m.

Directions: This building is on the north-west corner of Bloor and Yonge, accessible by subway from Bloor station. Pay parking is also ample in this area.

Security note: The elevators in the building are "locked down" after 5:30pm to people without building access cards. Leading up to the meeting someone will come down to the main floor lobby every few minutes to ferry people upstairs. There will be a number of scheduled trips:

	? 17:30
	? 18:00
	? 18:30
	? 18:45
	? 19:00
After 19:00, you can reach the access-card-carrying guy via a cell phone number that we'll leave with security in the front lobby. The room and floor numbers will be left with security too.

If any latecomers call up there will be a final group elevator run at 19:10. After that, access will be ad-hoc; call up from security and somebody will try to come down and let you up.

-- 

Mike Stok <mike at stok.ca>
http://www.stok.ca/~mike/

The "`Stok' disclaimers" apply.





From mike at stok.ca  Wed Jun 23 09:25:56 2010
From: mike at stok.ca (Mike Stok)
Date: Wed, 23 Jun 2010 12:25:56 -0400
Subject: [tpm] Meeting - June 24, 18:45 Perl and phones
In-Reply-To: <7F815467-9807-4B0C-A2BC-2349E8C48ED7@stok.ca>
References: <7F815467-9807-4B0C-A2BC-2349E8C48ED7@stok.ca>
Message-ID: <49E58051-46B2-442B-8698-0A7BF65E0228@stok.ca>

For all the Toronto Perl mongers who aren't en route from YAPC::NA...  And if you are going to YAPC::NA please consider volunteering for a few moments at the July meeting to share the YAPC goodness with the rest of us!

Date: Thu 24 Jun 2010 18:45 EDT
Venue: Nexient; Room 7 on the 12th floor
Topic: Perl and Phones (part II)
Synopsis:
This month we have Scott's talk on Perl on Android.

Scott Elcomb: Perl on Android

Location: 2 Bloor Street West, (usually) 8th or 16th floor. The room number will be announced on the mailing list a few days before the meeting. It will also be left with the security desk in the building (main floor lobby) shortly before the meeting starts (i.e. around 6pm).

Time: 6:45 p.m.

Directions: This building is on the north-west corner of Bloor and Yonge, accessible by subway from Bloor station. Pay parking is also ample in this area.

Security note: The elevators in the building are "locked down" after 5:30pm to people without building access cards. Leading up to the meeting someone will come down to the main floor lobby every few minutes to ferry people upstairs. There will be a number of scheduled trips:

	? 17:30
	? 18:00
	? 18:30
	? 18:45
	? 19:00
After 19:00, you can reach the access-card-carrying guy via a cell phone number that we'll leave with security in the front lobby. The room and floor numbers will be left with security too.

If any latecomers call up there will be a final group elevator run at 19:10. After that, access will be ad-hoc; call up from security and somebody will try to come down and let you up.

http://to.pm.org/

-- 

Mike Stok <mike at stok.ca>
http://www.stok.ca/~mike/

The "`Stok' disclaimers" apply.





From fulko.hew at gmail.com  Wed Jun 23 16:22:27 2010
From: fulko.hew at gmail.com (Fulko Hew)
Date: Wed, 23 Jun 2010 19:22:27 -0400
Subject: [tpm] Attempt to free unreferenced scalar
Message-ID: <AANLkTin8ycDpHiE-JzrknrNp6nhwDNjTvE-YoMQuLY9r@mail.gmail.com>

I'm in the process of developing a module, and during a very simple
test (when the program exits, and things get auto-cleaned-up, I get the
following error message:

Attempt to free unreferenced scalar: SV 0x8c1cc28, Perl interpreter:
0x8c1c008.

I know I'm probably doing something wrong somewhere, or better put:
'I'm not doing something I should be doing', but...

Whats the process of trying to figure out whats causing this error?
How do I find out what was in the variable at '0x8c1cc28'?
If I knew that, I may be able to figure out whats wrong.

Suggestions anyone?

TIA
Fulko
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From mike at stok.ca  Wed Jun 23 19:35:57 2010
From: mike at stok.ca (Mike Stok)
Date: Wed, 23 Jun 2010 22:35:57 -0400
Subject: [tpm] Attempt to free unreferenced scalar
In-Reply-To: <AANLkTin8ycDpHiE-JzrknrNp6nhwDNjTvE-YoMQuLY9r@mail.gmail.com>
References: <AANLkTin8ycDpHiE-JzrknrNp6nhwDNjTvE-YoMQuLY9r@mail.gmail.com>
Message-ID: <D7215A66-4693-45BF-91CE-6463C1536E48@stok.ca>


On Jun 23, 2010, at 7:22 PM, Fulko Hew wrote:

> 
> I'm in the process of developing a module, and during a very simple
> test (when the program exits, and things get auto-cleaned-up, I get the
> following error message:
> 
> Attempt to free unreferenced scalar: SV 0x8c1cc28, Perl interpreter: 0x8c1c008.
> 
> I know I'm probably doing something wrong somewhere, or better put:
> 'I'm not doing something I should be doing', but...
> 
> Whats the process of trying to figure out whats causing this error?
> How do I find out what was in the variable at '0x8c1cc28'?
> If I knew that, I may be able to figure out whats wrong.
> 
> Suggestions anyone?


What version of perl?  I have seen problems reported with 5.10.0 which were fixed in 5.10.1 e.g. http://www.gossamer-threads.com/lists/engine?do=post_view_printable;post=245361;list=perl

Mike

-- 

Mike Stok <mike at stok.ca>
http://www.stok.ca/~mike/

The "`Stok' disclaimers" apply.




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From fulko.hew at gmail.com  Thu Jun 24 06:08:46 2010
From: fulko.hew at gmail.com (Fulko Hew)
Date: Thu, 24 Jun 2010 09:08:46 -0400
Subject: [tpm] Attempt to free unreferenced scalar
In-Reply-To: <D7215A66-4693-45BF-91CE-6463C1536E48@stok.ca>
References: <AANLkTin8ycDpHiE-JzrknrNp6nhwDNjTvE-YoMQuLY9r@mail.gmail.com> 
	<D7215A66-4693-45BF-91CE-6463C1536E48@stok.ca>
Message-ID: <AANLkTimapks3kH7NYRwfSYj09bc7Y7ZzDBSl3uTvwYxC@mail.gmail.com>

On Wed, Jun 23, 2010 at 10:35 PM, Mike Stok <mike at stok.ca> wrote:

>
> On Jun 23, 2010, at 7:22 PM, Fulko Hew wrote:
>
>
> I'm in the process of developing a module, and during a very simple
> test (when the program exits, and things get auto-cleaned-up, I get the
> following error message:
>
> Attempt to free unreferenced scalar: SV 0x8c1cc28, Perl interpreter:
> 0x8c1c008.
>
> I know I'm probably doing something wrong somewhere, or better put:
> 'I'm not doing something I should be doing', but...
>
> Whats the process of trying to figure out whats causing this error?
> How do I find out what was in the variable at '0x8c1cc28'?
> If I knew that, I may be able to figure out whats wrong.
>
> Suggestions anyone?
>
>
> What version of perl?  I have seen problems reported with 5.10.0 which were
> fixed in 5.10.1 e.g.
> http://www.gossamer-threads.com/lists/engine?do=post_view_printable;post=245361;list=perl
>

Specifically version 5.8.8.
And yes, I saw the issues with specific versions, but I felt it was an issue
with
my code.  I've solved it (details below), but my generic question remains:

"Given a memory address, how can I dump the contents of the associated
variable?"

I see a number of modules on CPAN to: dump the internal structure of
scalars,
dump symbol tables, dump memory usage of variables, etc.
but not a 'dump the variable at a memory location'.

If I had something like that, I could have seen the value of the data, and
immediately recognized where that data was being generated and stored.

OK... Back to _my_ problem.

It turned out that I was storing a global variable into a hash element
inside an object.
Once I made it a 'my' variable, the problem went away.  The (bad) pseudo
code would be:

foreach $name (@names) {
   MYCLASS->new(name=>$name);
}

whereas it should have been:

foreach my $name (@names) {
   MYCLASS->new(name=>$name);
}
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From olaf at vilerichard.com  Fri Jun 25 11:01:23 2010
From: olaf at vilerichard.com (Olaf Alders)
Date: Fri, 25 Jun 2010 14:01:23 -0400
Subject: [tpm] Meeting - June 24, 18:45 Perl and phones
In-Reply-To: <49E58051-46B2-442B-8698-0A7BF65E0228@stok.ca>
References: <7F815467-9807-4B0C-A2BC-2349E8C48ED7@stok.ca>
	<49E58051-46B2-442B-8698-0A7BF65E0228@stok.ca>
Message-ID: <3C34E242-4F6C-47CC-888E-5D82A7AAC0A4@vilerichard.com>

Are there any slides available for those of us who missed last night's talk?

Olaf
--
Olaf Alders
olaf at vilerichard.com

http://vilerichard.com -- folk rock
http://twitter.com/vilerichard
http://cdbaby.com/cd/vilerichard 





From psema4 at gmail.com  Fri Jun 25 13:02:49 2010
From: psema4 at gmail.com (Scott Elcomb)
Date: Fri, 25 Jun 2010 16:02:49 -0400
Subject: [tpm] Meeting - June 24, 18:45 Perl and phones
In-Reply-To: <3C34E242-4F6C-47CC-888E-5D82A7AAC0A4@vilerichard.com>
References: <7F815467-9807-4B0C-A2BC-2349E8C48ED7@stok.ca>
	<49E58051-46B2-442B-8698-0A7BF65E0228@stok.ca>
	<3C34E242-4F6C-47CC-888E-5D82A7AAC0A4@vilerichard.com>
Message-ID: <AANLkTik6ybyHTJ5_kn-xxNQH7J-PHcTXebUJWcTlzvf0@mail.gmail.com>

On Fri, Jun 25, 2010 at 2:01 PM, Olaf Alders <olaf at vilerichard.com> wrote:
> Are there any slides available for those of us who missed last night's talk?

Not yet, but I will try to get them posted up later tonight.

Take care,
- Scott

-- 
  Scott Elcomb
  http://www.psema4.com/   @psema4

  Member of the Pirate Party of Canada
  http://www.pirateparty.ca/

From mike at stok.ca  Tue Jun 29 18:59:21 2010
From: mike at stok.ca (Mike Stok)
Date: Tue, 29 Jun 2010 21:59:21 -0400
Subject: [tpm] July meeting call for speakers (YAPC::NA debrief)
Message-ID: <702B2B3C-B1A3-42C9-8644-FE5E9C2EC138@stok.ca>

I'd like to get an idea of who can talk for a few minutes about the highlights of their YAPC::NA trip at the next Toronto Perl Mongers meeting, scheduled for 29 July 2010.

If you went to YAPC::NA and think you could do 5, 10, or more minutes on the interesting bits then let me know on or off list.

Thanks,

Mike

-- 

Mike Stok <mike at stok.ca>
http://www.stok.ca/~mike/

The "`Stok' disclaimers" apply.




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From fulko.hew at gmail.com  Wed Jun 30 08:06:49 2010
From: fulko.hew at gmail.com (Fulko Hew)
Date: Wed, 30 Jun 2010 11:06:49 -0400
Subject: [tpm] how to delete array entries en-passant
Message-ID: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com>

As the subject line asks...
what I'd like to do is something like

foreach (@array) {
    if (condition) {
        splice @array, this_entry, 1;
        next;
    }
    do processing on this entry;
}

@array now contains a sub-set of the original
that I can now further process




'delete' might work, but the words say delete on arrays is deprecated
and it still doesn't give me the delete 'this' entry concept, because
it too works on an index.

I'd like to do it without creating another array, because I like
'premature optimizations' and because I think it would make the
code more readable.  :-)

TIA
Fulko
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From shlomif at iglu.org.il  Wed Jun 30 08:41:06 2010
From: shlomif at iglu.org.il (Shlomi Fish)
Date: Wed, 30 Jun 2010 18:41:06 +0300
Subject: [tpm] how to delete array entries en-passant
In-Reply-To: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com>
References: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com>
Message-ID: <201006301841.07024.shlomif@iglu.org.il>

Hi Fulko,

On Wednesday 30 Jun 2010 18:06:49 Fulko Hew wrote:
> As the subject line asks...
> what I'd like to do is something like
> 
> foreach (@array) {
>     if (condition) {
>         splice @array, this_entry, 1;
>         next;
>     }
>     do processing on this entry;
> }
> 
> @array now contains a sub-set of the original
> that I can now further process
> 

It's always a bad idea to modify the order of an array's elements while 
iterating over it using foreach. Don't do that.

I should also note splicing an index out of the middle of an array is an O(N) 
operation where N is the number of elements in the array.

> 
> 
> 
> 'delete' might work, but the words say delete on arrays is deprecated
> and it still doesn't give me the delete 'this' entry concept, because
> it too works on an index.
> 
> I'd like to do it without creating another array, because I like
> 'premature optimizations' and because I think it would make the
> code more readable.  :-)

It will likely make things slower and less readable (assuming it will work at 
all), so don't do that.

Regards,

	Shlomi Fish

-- 
-----------------------------------------------------------------
Shlomi Fish       http://www.shlomifish.org/
Freecell Solver - http://fc-solve.berlios.de/

God considered inflicting XSLT as the tenth plague of Egypt, but then
decided against it because he thought it would be too evil.

Please reply to list if it's a mailing list post - http://shlom.in/reply .

From shlomif at iglu.org.il  Wed Jun 30 08:41:06 2010
From: shlomif at iglu.org.il (Shlomi Fish)
Date: Wed, 30 Jun 2010 18:41:06 +0300
Subject: [tpm] how to delete array entries en-passant
In-Reply-To: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com>
References: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com>
Message-ID: <201006301841.07024.shlomif@iglu.org.il>

Hi Fulko,

On Wednesday 30 Jun 2010 18:06:49 Fulko Hew wrote:
> As the subject line asks...
> what I'd like to do is something like
> 
> foreach (@array) {
>     if (condition) {
>         splice @array, this_entry, 1;
>         next;
>     }
>     do processing on this entry;
> }
> 
> @array now contains a sub-set of the original
> that I can now further process
> 

It's always a bad idea to modify the order of an array's elements while 
iterating over it using foreach. Don't do that.

I should also note splicing an index out of the middle of an array is an O(N) 
operation where N is the number of elements in the array.

> 
> 
> 
> 'delete' might work, but the words say delete on arrays is deprecated
> and it still doesn't give me the delete 'this' entry concept, because
> it too works on an index.
> 
> I'd like to do it without creating another array, because I like
> 'premature optimizations' and because I think it would make the
> code more readable.  :-)

It will likely make things slower and less readable (assuming it will work at 
all), so don't do that.

Regards,

	Shlomi Fish

-- 
-----------------------------------------------------------------
Shlomi Fish       http://www.shlomifish.org/
Freecell Solver - http://fc-solve.berlios.de/

God considered inflicting XSLT as the tenth plague of Egypt, but then
decided against it because he thought it would be too evil.

Please reply to list if it's a mailing list post - http://shlom.in/reply .

From indy at indigostar.com  Wed Jun 30 08:49:10 2010
From: indy at indigostar.com (Indy Singh)
Date: Wed, 30 Jun 2010 11:49:10 -0400
Subject: [tpm] how to delete array entries en-passant
References: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com>
Message-ID: <6543CDDEF9D244938C123FAA92DBCF3E@ROADKILL>

Modifying the array while iterating through the array is usually something to be avoided when writing clear code.  Don't do it.

What would you expect the foreach function to return when you are modifying the list under its feet?

You may also want to look at using the grep and map functions.

Indy Singh
IndigoSTAR Software -- www.indigostar.com

  ----- Original Message ----- 
  From: Fulko Hew 
  To: TPM 
  Sent: Wednesday, June 30, 2010 11:06 AM
  Subject: [tpm] how to delete array entries en-passant


  As the subject line asks...
  what I'd like to do is something like

  foreach (@array) {
      if (condition) {
          splice @array, this_entry, 1;
          next;
      }
      do processing on this entry;    
  }

  @array now contains a sub-set of the original
  that I can now further process




  'delete' might work, but the words say delete on arrays is deprecated
  and it still doesn't give me the delete 'this' entry concept, because
  it too works on an index.

  I'd like to do it without creating another array, because I like
  'premature optimizations' and because I think it would make the
  code more readable.  :-)

  TIA
  Fulko




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


  _______________________________________________
  toronto-pm mailing list
  toronto-pm at pm.org
  http://mail.pm.org/mailman/listinfo/toronto-pm
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From shlomif at iglu.org.il  Wed Jun 30 09:02:55 2010
From: shlomif at iglu.org.il (Shlomi Fish)
Date: Wed, 30 Jun 2010 19:02:55 +0300
Subject: [tpm] how to delete array entries en-passant
In-Reply-To: <6543CDDEF9D244938C123FAA92DBCF3E@ROADKILL>
References: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com>
	<6543CDDEF9D244938C123FAA92DBCF3E@ROADKILL>
Message-ID: <201006301902.55837.shlomif@iglu.org.il>

On Wednesday 30 Jun 2010 18:49:10 Indy Singh wrote:
> Modifying the array while iterating through the array is usually something
> to be avoided when writing clear code.  Don't do it.

Well, you are allowed to modify the elements themselves one at a time, using 
something like:

foreach my $var (@array)
{
	$var = SOMETHING_ELSE($var);
}

But modifying the order of the elements should be avoided.

> 
> What would you expect the foreach function to return when you are modifying
> the list under its feet?

A few notes - in Perl, foreach is not a function - it's a loop construct with 
some magic. And one should not rely on the return value of a foreach list - 
use it only for side-effects.

> 
> You may also want to look at using the grep and map functions.
> 

Right.

Regards,

	Shlomi Fish

> Indy Singh
> IndigoSTAR Software -- www.indigostar.com
> 

-- 
-----------------------------------------------------------------
Shlomi Fish       http://www.shlomifish.org/
Why I Love Perl - http://shlom.in/joy-of-perl

God considered inflicting XSLT as the tenth plague of Egypt, but then
decided against it because he thought it would be too evil.

Please reply to list if it's a mailing list post - http://shlom.in/reply .

From shlomif at iglu.org.il  Wed Jun 30 09:02:55 2010
From: shlomif at iglu.org.il (Shlomi Fish)
Date: Wed, 30 Jun 2010 19:02:55 +0300
Subject: [tpm] how to delete array entries en-passant
In-Reply-To: <6543CDDEF9D244938C123FAA92DBCF3E@ROADKILL>
References: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com>
	<6543CDDEF9D244938C123FAA92DBCF3E@ROADKILL>
Message-ID: <201006301902.55837.shlomif@iglu.org.il>

On Wednesday 30 Jun 2010 18:49:10 Indy Singh wrote:
> Modifying the array while iterating through the array is usually something
> to be avoided when writing clear code.  Don't do it.

Well, you are allowed to modify the elements themselves one at a time, using 
something like:

foreach my $var (@array)
{
	$var = SOMETHING_ELSE($var);
}

But modifying the order of the elements should be avoided.

> 
> What would you expect the foreach function to return when you are modifying
> the list under its feet?

A few notes - in Perl, foreach is not a function - it's a loop construct with 
some magic. And one should not rely on the return value of a foreach list - 
use it only for side-effects.

> 
> You may also want to look at using the grep and map functions.
> 

Right.

Regards,

	Shlomi Fish

> Indy Singh
> IndigoSTAR Software -- www.indigostar.com
> 

-- 
-----------------------------------------------------------------
Shlomi Fish       http://www.shlomifish.org/
Why I Love Perl - http://shlom.in/joy-of-perl

God considered inflicting XSLT as the tenth plague of Egypt, but then
decided against it because he thought it would be too evil.

Please reply to list if it's a mailing list post - http://shlom.in/reply .

From fulko.hew at gmail.com  Wed Jun 30 09:11:33 2010
From: fulko.hew at gmail.com (Fulko Hew)
Date: Wed, 30 Jun 2010 12:11:33 -0400
Subject: [tpm] how to delete array entries en-passant
In-Reply-To: <201006301841.07024.shlomif@iglu.org.il>
References: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com> 
	<201006301841.07024.shlomif@iglu.org.il>
Message-ID: <AANLkTinQTyzH-67avLdrnnC8wnykb9q_aE_4TluJa0_P@mail.gmail.com>

On Wed, Jun 30, 2010 at 11:41 AM, Shlomi Fish <shlomif at iglu.org.il> wrote:

> Hi Fulko,
>
> On Wednesday 30 Jun 2010 18:06:49 Fulko Hew wrote:
> > As the subject line asks...
> > what I'd like to do is something like
> >
> > foreach (@array) {
> >     if (condition) {
> >         splice @array, this_entry, 1;
> >         next;
> >     }
> >     do processing on this entry;
> > }
> >
> > @array now contains a sub-set of the original
> > that I can now further process
> >
>
> It's always a bad idea to modify the order of an array's elements while
> iterating over it using foreach. Don't do that.
>

OK, let me give you the specific example...
The array contains all of the lines of a file...
The foreach is used to loop over then, and 'take action' upon them.
But when I'm done I want all the empty lines stripped from the array ('just
because!')


> I should also note splicing an index out of the middle of an array is an
> O(N)
> operation where N is the number of elements in the array.
>

I know, thats why I was looking for a 'faster' technique.

I guess the alternative could be (shown simplified):

my @array;
while ($_ = <>) {
    next unless $_;      # skip empty lines
    push @array, $_;     # but remember non-empty lines
    process($_);
}
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From fulko.hew at gmail.com  Wed Jun 30 09:11:33 2010
From: fulko.hew at gmail.com (Fulko Hew)
Date: Wed, 30 Jun 2010 12:11:33 -0400
Subject: [tpm] how to delete array entries en-passant
In-Reply-To: <201006301841.07024.shlomif@iglu.org.il>
References: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com> 
	<201006301841.07024.shlomif@iglu.org.il>
Message-ID: <AANLkTinQTyzH-67avLdrnnC8wnykb9q_aE_4TluJa0_P@mail.gmail.com>

On Wed, Jun 30, 2010 at 11:41 AM, Shlomi Fish <shlomif at iglu.org.il> wrote:

> Hi Fulko,
>
> On Wednesday 30 Jun 2010 18:06:49 Fulko Hew wrote:
> > As the subject line asks...
> > what I'd like to do is something like
> >
> > foreach (@array) {
> >     if (condition) {
> >         splice @array, this_entry, 1;
> >         next;
> >     }
> >     do processing on this entry;
> > }
> >
> > @array now contains a sub-set of the original
> > that I can now further process
> >
>
> It's always a bad idea to modify the order of an array's elements while
> iterating over it using foreach. Don't do that.
>

OK, let me give you the specific example...
The array contains all of the lines of a file...
The foreach is used to loop over then, and 'take action' upon them.
But when I'm done I want all the empty lines stripped from the array ('just
because!')


> I should also note splicing an index out of the middle of an array is an
> O(N)
> operation where N is the number of elements in the array.
>

I know, thats why I was looking for a 'faster' technique.

I guess the alternative could be (shown simplified):

my @array;
while ($_ = <>) {
    next unless $_;      # skip empty lines
    push @array, $_;     # but remember non-empty lines
    process($_);
}
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From sfryer at sourcery.ca  Wed Jun 30 09:25:44 2010
From: sfryer at sourcery.ca (Shaun Fryer)
Date: Wed, 30 Jun 2010 12:25:44 -0400
Subject: [tpm] how to delete array entries en-passant
In-Reply-To: <AANLkTinQTyzH-67avLdrnnC8wnykb9q_aE_4TluJa0_P@mail.gmail.com>
References: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com>
	<201006301841.07024.shlomif@iglu.org.il>
	<AANLkTinQTyzH-67avLdrnnC8wnykb9q_aE_4TluJa0_P@mail.gmail.com>
Message-ID: <AANLkTinK-j50n3y-ZChluEwwFCynAbW1bttHdrz_0AAX@mail.gmail.com>

@array = grep {!/^\s*\z/} @array; # strip empty (or whitespace only) lines
--
Shaun Fryer

On Wed, Jun 30, 2010 at 12:11 PM, Fulko Hew <fulko.hew at gmail.com> wrote:
>
>
> On Wed, Jun 30, 2010 at 11:41 AM, Shlomi Fish <shlomif at iglu.org.il> wrote:
>>
>> Hi Fulko,
>>
>> On Wednesday 30 Jun 2010 18:06:49 Fulko Hew wrote:
>> > As the subject line asks...
>> > what I'd like to do is something like
>> >
>> > foreach (@array) {
>> > ? ? if (condition) {
>> > ? ? ? ? splice @array, this_entry, 1;
>> > ? ? ? ? next;
>> > ? ? }
>> > ? ? do processing on this entry;
>> > }
>> >
>> > @array now contains a sub-set of the original
>> > that I can now further process
>> >
>>
>> It's always a bad idea to modify the order of an array's elements while
>> iterating over it using foreach. Don't do that.
>
> OK, let me give you the specific example...
> The array contains all of the lines of a file...
> The foreach is used to loop over then, and 'take action' upon them.
> But when I'm done I want all the empty lines stripped from the array ('just
> because!')
>
>>
>> I should also note splicing an index out of the middle of an array is an
>> O(N)
>> operation where N is the number of elements in the array.
>
> I know, thats why I was looking for a 'faster' technique.
>
> I guess the alternative could be (shown simplified):
>
> my @array;
> while ($_ = <>) {
> ??? next unless $_;????? # skip empty lines
> ??? push @array, $_;???? # but remember non-empty lines
> ? ? process($_);
> }
>
>
> _______________________________________________
> toronto-pm mailing list
> toronto-pm at pm.org
> http://mail.pm.org/mailman/listinfo/toronto-pm
>
>

From arocker at vex.net  Wed Jun 30 09:31:40 2010
From: arocker at vex.net (arocker at vex.net)
Date: Wed, 30 Jun 2010 12:31:40 -0400
Subject: [tpm] how to delete array entries en-passant
In-Reply-To: <AANLkTinQTyzH-67avLdrnnC8wnykb9q_aE_4TluJa0_P@mail.gmail.com>
References: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com>
	<201006301841.07024.shlomif@iglu.org.il>
	<AANLkTinQTyzH-67avLdrnnC8wnykb9q_aE_4TluJa0_P@mail.gmail.com>
Message-ID: <3576f48081d11bfbed9fe81febbdc064.squirrel@webmail.vex.net>

>
> OK, let me give you the specific example...
> The array contains all of the lines of a file...
> The foreach is used to loop over then, and 'take action' upon them.
> But when I'm done I want all the empty lines stripped from the array
> ('just
> because!')
>
Does the process require the presence of the entire file in memory before
the loop, and the shuffled-down file afterwards? Do you output the
remaining lines?



From arocker at vex.net  Wed Jun 30 09:31:40 2010
From: arocker at vex.net (arocker at vex.net)
Date: Wed, 30 Jun 2010 12:31:40 -0400
Subject: [tpm] how to delete array entries en-passant
In-Reply-To: <AANLkTinQTyzH-67avLdrnnC8wnykb9q_aE_4TluJa0_P@mail.gmail.com>
References: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com>
	<201006301841.07024.shlomif@iglu.org.il>
	<AANLkTinQTyzH-67avLdrnnC8wnykb9q_aE_4TluJa0_P@mail.gmail.com>
Message-ID: <3576f48081d11bfbed9fe81febbdc064.squirrel@webmail.vex.net>

>
> OK, let me give you the specific example...
> The array contains all of the lines of a file...
> The foreach is used to loop over then, and 'take action' upon them.
> But when I'm done I want all the empty lines stripped from the array
> ('just
> because!')
>
Does the process require the presence of the entire file in memory before
the loop, and the shuffled-down file afterwards? Do you output the
remaining lines?



From fulko.hew at gmail.com  Wed Jun 30 09:35:37 2010
From: fulko.hew at gmail.com (Fulko Hew)
Date: Wed, 30 Jun 2010 12:35:37 -0400
Subject: [tpm] how to delete array entries en-passant
In-Reply-To: <3576f48081d11bfbed9fe81febbdc064.squirrel@webmail.vex.net>
References: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com> 
	<201006301841.07024.shlomif@iglu.org.il>
	<AANLkTinQTyzH-67avLdrnnC8wnykb9q_aE_4TluJa0_P@mail.gmail.com> 
	<3576f48081d11bfbed9fe81febbdc064.squirrel@webmail.vex.net>
Message-ID: <AANLkTin_xqPhcu-u2x-VFeBdc2cdrIj8uaQUNCo9sOmo@mail.gmail.com>

On Wed, Jun 30, 2010 at 12:31 PM, <arocker at vex.net> wrote:

> >
> > OK, let me give you the specific example...
> > The array contains all of the lines of a file...
> > The foreach is used to loop over then, and 'take action' upon them.
> > But when I'm done I want all the empty lines stripped from the array
> > ('just
> > because!')
> >
> Does the process require the presence of the entire file in memory before
> the loop, and the shuffled-down file afterwards? Do you output the
> remaining lines?
>

No, but I need to output the 'remaining' lines.

Also I forgot to mention, the reason the original data was in an array, was
because
it came from one of two sources... slurping a file, or a 'received' string.
So I thought I'd first normalize either dataset into the array I would then
traverse.
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From fulko.hew at gmail.com  Wed Jun 30 09:35:37 2010
From: fulko.hew at gmail.com (Fulko Hew)
Date: Wed, 30 Jun 2010 12:35:37 -0400
Subject: [tpm] how to delete array entries en-passant
In-Reply-To: <3576f48081d11bfbed9fe81febbdc064.squirrel@webmail.vex.net>
References: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com> 
	<201006301841.07024.shlomif@iglu.org.il>
	<AANLkTinQTyzH-67avLdrnnC8wnykb9q_aE_4TluJa0_P@mail.gmail.com> 
	<3576f48081d11bfbed9fe81febbdc064.squirrel@webmail.vex.net>
Message-ID: <AANLkTin_xqPhcu-u2x-VFeBdc2cdrIj8uaQUNCo9sOmo@mail.gmail.com>

On Wed, Jun 30, 2010 at 12:31 PM, <arocker at vex.net> wrote:

> >
> > OK, let me give you the specific example...
> > The array contains all of the lines of a file...
> > The foreach is used to loop over then, and 'take action' upon them.
> > But when I'm done I want all the empty lines stripped from the array
> > ('just
> > because!')
> >
> Does the process require the presence of the entire file in memory before
> the loop, and the shuffled-down file afterwards? Do you output the
> remaining lines?
>

No, but I need to output the 'remaining' lines.

Also I forgot to mention, the reason the original data was in an array, was
because
it came from one of two sources... slurping a file, or a 'received' string.
So I thought I'd first normalize either dataset into the array I would then
traverse.
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From stuart at morungos.com  Wed Jun 30 09:45:43 2010
From: stuart at morungos.com (Stuart Watt)
Date: Wed, 30 Jun 2010 09:45:43 -0700
Subject: [tpm] how to delete array entries en-passant
In-Reply-To: <AANLkTin_xqPhcu-u2x-VFeBdc2cdrIj8uaQUNCo9sOmo@mail.gmail.com>
References: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com>
	<201006301841.07024.shlomif@iglu.org.il>
	<AANLkTinQTyzH-67avLdrnnC8wnykb9q_aE_4TluJa0_P@mail.gmail.com>
	<3576f48081d11bfbed9fe81febbdc064.squirrel@webmail.vex.net>
	<AANLkTin_xqPhcu-u2x-VFeBdc2cdrIj8uaQUNCo9sOmo@mail.gmail.com>
Message-ID: <BBD0852C-5244-4461-84C8-B91B2AFFBD91@morungos.com>

You could take the alternative route of turning the string into a file handle, using open on a reference to the string (an example is shown in perldoc -f open), and then having a single regular while loop over lines read from a file handle (whether from string or file), chomping and processing. This would likely be the most memory efficient, as you'd never need a second copy of the input in memory. Useful if you could be dealing with very large files.

I think this may be Perl 5.10. Perl 5.8 might use a separate module, IO::String, for the same purpose, if I remember right. 

Just a thought - but I do love the way Perl allows you to work with a file handle backed by a string so easily.

All the best
Stuart

On 2010-06-30, at 9:35 AM, Fulko Hew wrote:

> 
> 
> On Wed, Jun 30, 2010 at 12:31 PM, <arocker at vex.net> wrote:
> >
> > OK, let me give you the specific example...
> > The array contains all of the lines of a file...
> > The foreach is used to loop over then, and 'take action' upon them.
> > But when I'm done I want all the empty lines stripped from the array
> > ('just
> > because!')
> >
> Does the process require the presence of the entire file in memory before
> the loop, and the shuffled-down file afterwards? Do you output the
> remaining lines?
> 
> No, but I need to output the 'remaining' lines.
> 
> Also I forgot to mention, the reason the original data was in an array, was because
> it came from one of two sources... slurping a file, or a 'received' string.
> So I thought I'd first normalize either dataset into the array I would then traverse.
> 
> _______________________________________________
> toronto-pm mailing list
> toronto-pm at pm.org
> http://mail.pm.org/mailman/listinfo/toronto-pm

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From sfryer at sourcery.ca  Wed Jun 30 09:46:07 2010
From: sfryer at sourcery.ca (Shaun Fryer)
Date: Wed, 30 Jun 2010 12:46:07 -0400
Subject: [tpm] how to delete array entries en-passant
In-Reply-To: <AANLkTin_xqPhcu-u2x-VFeBdc2cdrIj8uaQUNCo9sOmo@mail.gmail.com>
References: <AANLkTinT4cMWQoCOKoWOfl1_j0hM_pKSHc4PdgkBboop@mail.gmail.com>
	<201006301841.07024.shlomif@iglu.org.il>
	<AANLkTinQTyzH-67avLdrnnC8wnykb9q_aE_4TluJa0_P@mail.gmail.com>
	<3576f48081d11bfbed9fe81febbdc064.squirrel@webmail.vex.net>
	<AANLkTin_xqPhcu-u2x-VFeBdc2cdrIj8uaQUNCo9sOmo@mail.gmail.com>
Message-ID: <AANLkTikjpkdy81Y73oXLXpaBeTwZNuarJmexkXU22ztU@mail.gmail.com>

# a file and an input stream are both filehandles
# assign $fh from either <> or open()

while (<$fh>) {
    my $line = process($_);
    print $line if $line !~ /^\s*\z/;
}

--
Shaun Fryer

On Wed, Jun 30, 2010 at 12:35 PM, Fulko Hew <fulko.hew at gmail.com> wrote:
>> Does the process require the presence of the entire file in memory before
>> the loop, and the shuffled-down file afterwards? Do you output the
>> remaining lines?
>
> No, but I need to output the 'remaining' lines.
>
> Also I forgot to mention, the reason the original data was in an array, was
> because
> it came from one of two sources... slurping a file, or a 'received' string.
> So I thought I'd first normalize either dataset into the array I would then
> traverse.

From psema4 at gmail.com  Wed Jun 30 19:07:49 2010
From: psema4 at gmail.com (Scott Elcomb)
Date: Wed, 30 Jun 2010 22:07:49 -0400
Subject: [tpm] Meeting - June 24, 18:45 Perl and phones
In-Reply-To: <3C34E242-4F6C-47CC-888E-5D82A7AAC0A4@vilerichard.com>
References: <7F815467-9807-4B0C-A2BC-2349E8C48ED7@stok.ca>
	<49E58051-46B2-442B-8698-0A7BF65E0228@stok.ca>
	<3C34E242-4F6C-47CC-888E-5D82A7AAC0A4@vilerichard.com>
Message-ID: <AANLkTikTotay93Op3-JSbuSRfKcMOAL0_e08_HDKdOHK@mail.gmail.com>

On Fri, Jun 25, 2010 at 2:01 PM, Olaf Alders <olaf at vilerichard.com> wrote:
> Are there any slides available for those of us who missed last night's talk?

Apologies for the prolonged delay.

The slides can be found at
<http://presentations.psema4.com/2010/poa-talk.html> and are contained
within a TiddlyWiki (using the SlideShowPlugin).

Upon opening the document, click "Start Presentation"; the controls
are somewhat similar to those of s5.  Hovering over the bottom
right-hand portion of the document (near the page counter) will
display a small toolbar if you need it.

Cheers,
- Scott.


-- 
  Scott Elcomb
  http://www.psema4.com/   @psema4

  Member of the Pirate Party of Canada
  http://www.pirateparty.ca/