blogs.perl.org

Have you used CPAN module MCE for parallel processing?

If not then you should checkout this post for introduction.

https://theweeklychallenge.org/blog/mce-how-to

This year's London Perl and Raku Workshop will take place on 26th Oct 2024. Without our sponsors this event would not happen and we would like to thank them.

Since its founding in 2000, CV-Library has relied on Perl as the backbone of its core operations. Today, as the UK’s leading independent job board, we host over 150,000 job postings and maintain a database of more than 20 million CVs.

For nearly 25 years, CV-Library has been a committed supporter of LPW and the Perl community. We're proud to reaffirm this dedication at the 2024 conference.

Our platform now integrates modern Perl with Go, leveraging Kubernetes for scalable deployments, alongside other cutting-edge technologies to ensure stability and reliability.

Our development team consistently delivers high-quality features through code reviews, automated tests, and continuous deployment. Additionally, we regularly contribute to free and open-source projects, including CPAN.

CV-Library offers remote opportunities for developers and testers at all levels. We encourage participation in community meetups and collaboration days. Feel free to introduce yourself to Mark or any member of our team at the event, or explore our current job openings here.

We had a guest this week: Olaf Alders.

• We exchanged Perl (re)branding ideas with Olaf. We will be keeping in touch on that front.
• We discussed the feedback on feature-guarding and unbundling apostrophe. We came up with a strategy to propose that we think should work, which will be posted on the relevant thread.
• We discussed the fact that keeping the current smartmatch operator (as a feature) means we can’t have a meaningful air gap to prevent subtle bugs when moving to a future “good” smartmatch. This probably implies that we would be giving up on any future smart match operator, but there are usually better replacements.

[P5P posting of this summary]

These are some answers to the Week 290, Task 2, of the Perl Weekly Challenge organized by Mohammad S. Anwar.

Spoiler Alert: This weekly challenge deadline is due in a few days from now (on October 13, 2024, at 23:59). This blog post provides some solutions to this challenge. Please don’t read on if you intend to complete the challenge on your own.

Task 2: Luhn’s Algorithm

You are given a string $str containing digits (and possibly other characters which can be ignored). The last digit is the payload; consider it separately. Counting from the right, double the value of the first, third, etc. of the remaining digits.

For each value now greater than 9, sum its digits.

The correct check digit is that which, added to the sum of all values, would bring the total mod 10 to zero.

Return true if and only if the payload is equal to the correct check digit.

It was originally posted on reddit.

Example 1

Have you play with the new command line switch -g in Perl?

Please checkout this post for more information.

https://theweeklychallenge.org/blog/slurp-in-perl

This year's London Perl and Raku Workshop will take place on 26th Oct 2024. Without our sponsors this event would not happen and we would like to thank them.

Perl developers are hard to get. As the leading language of the dotcom boom, Perl is one of the best-paid languages worldwide, yet Perl training seldom features on university curricula. But that doesn't have to cause a headache for employers trying to expand their Perl team.

Geekuni can give software developers with no previous Perl experience the training they need, as they need it. So, whether you’re looking to provide new recruits with online Perl training from day one of the onboarding process or upskill existing talent, Geekuni has the training package to empower your staff with Perl.

To find out more, go here: https://geekuni.com/corporate-perl-training or email andrew@geekuni.com

Geizhals Preisvergleich is one of the largest product and price comparison platforms in the German-speaking area.

Everyone was present this week.

• We devised a strategy to deal with smartmatch, starting with reverting its removal. A separate email with details will follow.
• We spent too much time talking about putting the apostrophe package separator behind a feature. That too will be outlined in a separate email. A github issue will follow.
• We want to revert the open undef patch, for a variety of reasons, such as breaking autodie. We decided the steps to handle this.

[P5P posting of this summary]

These are some answers to the Week 289, Task 1, of the Perl Weekly Challenge organized by Mohammad S. Anwar.

Spoiler Alert: This weekly challenge deadline is due in a few days from now (on October 6, 2024, at 23:59). This blog post provides some solutions to this challenge. Please don’t read on if you intend to complete the challenge on your own.

Task 1: Third Maximum

You are given an array of integers, @ints.

Write a script to find the third distinct maximum in the given array. If third maximum doesn’t exist then return the maximum number.

Example 1

Input: @ints = (5, 6, 4, 1)
Output: 4

The first distinct maximum is 6.
The second distinct maximum is 5.
The third distinct maximum is 4.

Example 2

This article on the Python Software Foundation inspired me to write this. Serving on the board of a foundation isn't all about glamorous meetings and fancy titles. Still, I'd like to share how I ended up here and what I've learned along the way. Opinions are my own.

What Exactly is TPF?

TPF stands for The Perl Foundation, a U.S.-based non-profit organization dedicated to advancing the Perl language through open discussion, collaboration, and, of course, code.

TPF got its start around 2001 when Perl was super popular. The organization was originally needed to run a conference; because apparently, you need an official entity to book conference venues. The foundation was also actively raising funds and spending money on Perl development grants at that time, and they've been doing it ever since.

This year's London Perl and Raku Workshop will take place on 26th Oct 2024. Without our sponsors this event would not happen and we would like to thank them, starting with our diamond sponsor:

Deriv, a leading online broker with 25 years in the industry, is proud to sponsor the London Perl & Raku Workshop 2024.

As a company with strong ties to the Open Source community, our connection to Perl is more than just practical—it's a passion. Over the years, we have actively used Modern Perl and contributed to shaping its future, including beta testing key developments like Object::Pad, which are crucial for advancing the language's capabilities.

Perl is the backbone of our back-end operations, proving to be a robust, reliable, and versatile language that meets our needs. Its community-driven growth, notably through CPAN, continually boosts its capabilities and reflects our values of collaboration and innovation.

Hi All

Note: The first 3 links point to my personal page

The Perl wiki has been renamed from Perl.html - which was too generic - to Perl.Wiki.html:

The Mojolicious wiki is at:

The Debian wiki is at:

Note: The next 2 links point to my new website which accompanies my upcoming Youtube channel

The Symbolic Language wiki is at:

The Personal Security wiki is at:
https://symboliciq.au/misc/Personal.Security.Wiki.html

All present, and this time the meeting actually ended on time.

• We discussed the situation with the apostrophe package separator removal. We continue to keep an eye on things but it now feels close to inevitable that we will use a feature to disable it conditionally.
• We briefly touched on the removal of smartmatch, where both the extent of the situation and our thoughts so far are much less clear.
• Connected to all that, we discussed some general thoughts on how not to keep finding ourselves in the same situation with changes like this, but found we probably already have all the mechanisms we need.
• We decided that the provisions of the PPC process are the right way for pre-PPC “Signature named parameters” to play out so it has now become PPC 0024 with status “Exploratory”.
• We took another brief look at the closure memory leak which is now #22547 and resolved to prepare to put down a consensus next time we meet.

[P5P posting of this summary]

These are some answers to the Week 285, Task 1, of the Perl Weekly Challenge organized by Mohammad S. Anwar.

Spoiler Alert: This weekly challenge deadline is due in a few days from now (on September 8, 2024, at 23:59). This blog post provides some solutions to this challenge. Please don’t read on if you intend to complete the challenge on your own.

Task 1: No Connection

You are given a list of routes, @routes.

Write a script to find the destination with no further outgoing connection.

Example 1

Input: @routes = (["B","C"], ["D","B"], ["C","A"])
Output: "A"

"D" -> "B" -> "C" -> "A".
"B" -> "C" -> "A".
"C" -> "A".
"A".

This year's London Perl and Raku Workshop is just 4 weeks away. We now have a pretty full schedule, so the call for presentations is now closed, however we might have room for one or two more talks depending circumstances on the day. If you really think you have talk you want to give then get in touch.

As part of the workshop we would like to ask attendees if any are willing to volunteer for helping out on the day. This will likely include:

• Room monitoring and video equipment operation
• Registration of attendees
• General assistance of organisers and attendees

We are probably looking for three people to help out on the day. Please contact the organisers if you would like to help out.

The London Perl and Raku Workshop will take place on 26th Oct 2024. Thanks to this year's sponsors, without whom LPW would not happen:

• Deriv
• CV-Library
• Geekuni
• Geizhals Preisvergleich
• Datensegler e.U.
• SpareRoom
• Oleeo

The following script leaks memory in perl v5.40, and it did not in v5.38:

use Scalar::Util 'weaken';
my $z;
{
    my $x;
    my $y;
    my sub my_sub {
        $x = shift;
        return sub { $y };
    };
    my $subscriber = {};
    $subscriber->{foo} = my_sub($subscriber);
    weaken($z = $subscriber);
}
say 'leak = ', int defined $z;

We were all present this week:

• We rehashed the Perl version number discussion from last meeting now that we are all present. We will put together a document with our thoughts on this.
• We will create a GitHub issue to make apostrophe removal feature-guarded.
• Smartmatch (not so surprisingly) turns out to be too big to fail. Given its unique history, we are considering options for how to proceed with it in a more gradual way without giving up on the deprecation.
• Regarding open undef (GH #22490), we agreed that Perl should support undef as a value and not just as a literal for the filename (and warn for the useless modes)

[P5P posting of this summary]

These are some answers to the Week 284, Task 2, of the Perl Weekly Challenge organized by Mohammad S. Anwar.

Spoiler Alert: This weekly challenge deadline is due in a few days from now (on September 1, 2024, at 23:59). This blog post provides some solutions to this challenge. Please don’t read on if you intend to complete the challenge on your own.

Task 2: Relative Sort

You are given two list of integers, @list1 and @list2. The elements in the @list2 are distinct and also in the @list1.

Write a script to sort the elements in the @list1 such that the relative order of items in @list1 is same as in the @list2. Elements that is missing in @list2 should be placed at the end of @list1 in ascending order.

Example 1

Input: @list1 = (2, 3, 9, 3, 1, 4, 6, 7, 2, 8, 5)
       @list2 = (2, 1, 4, 3, 5, 6)
Ouput: (2, 2, 1, 4, 3, 3, 5, 6, 7, 8, 9)

Example 2

Yep, that's right - the second half dozen talks have been accepted for this year's London Perl and Raku Workshop. This puts our schedule at approximately 80% full, so if you are thinking about talking at the workshop then submit your proposal now!

The CFP will be closed at the end of September to give speakers sufficient time to finish their presentations and to allow the schedule to be created. We encourage all attendees to mark talks they are interested in as that will inform some of the schedule choices.

If you aren't thinking about talking then have a think about what you've been doing in the Perl and/or Raku space the last five years, or even just the general IT and development space. Perhaps there's something interesting you can talk about? If you don't feel it's a full fat talk then submit a lightning talk instead.

The London Perl and Raku Workshop will take place on 26th Oct 2024. Thanks to this year's sponsors, without whom LPW would not happen:

• Deriv
• CV-Library
• Geekuni
• Geizhals Preisvergleich
• Datensegler e.U.
• SpareRoom

If you would like to sponsor LPW then please have a look at the options here: https://act.yapc.eu/lpw2024/sponsoring.html

Earlier today I read a post from Neil Bowers inviting CPAN authors to consider being involved in CPAN day, which is coincidentally today.

It prompted me to take a serious look at the modules I have uploaded to CPAN and acknowledge that some of them are no longer valuable. Indeed as I reviewed one of them I was none too kind in my judgements against the author.

That made it quite easy for me to see how I can easily participate in CPAN day. I'm removing a couple of modules:

1. Business::Worldpay::Junior - I don't think this integration option even exists any more and I certainly haven't actively maintained this for years.
2. Net::UKDomain::Nominet::Automaton - Nominet withdrew the Automaton in 2015

Those are now scheduled for deletion on Monday next week.

I'll need to review some of the others and consider whether to open them up for anyone who is interested to take over as maintainer.

For now I've done my bit.

Just Aristotle and Graham.

The notes from this meeting were lost, but have been reconstructed from memory.

• We had a discussion about what future versioning (Perl 7) should look like.
• Discussed if we will need to make changes to apostrophe as package separator, and smartmatch removal, given the fallout they have had.

[P5P posting of this summary]