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Issue #757 - 2026-01-26 - Contribute to CPAN!
latest | archive | edited by Gabor Szabo
This edition was made possible by the supporters of our cause.
Don't miss the next issue!
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Hi there! On Saturday, (evening for me, noon-ish in the Americas) we had an excellent meeting and there are recordings you can watch. In the first hour I showed some PRs I sent to MIME::Lite. You can watch the video here. In the second hour we changed the setup and we continued in driver-navigator style pair programming. I was giving the instructions and two other participants made the changes and sent the PR. Others in the audience made suggestions. So actually this was mob programming. As far as I know, this was the first time they contributed to open source projects. One of the PRs was already accepted while we were still in the meeting. Talk about quick feedback and fast ROI. You can watch the video here. Don't forget to 'like' the videos on YouTube and to follow the channel! I've scheduled the next such event. Register here!. My hope is that many more of you will participate and then after getting a taste and having some practice you'll spend 15-20 min a day (2 hours a week) on similar contributions. Having 10-20 or maybe even 100 people doing that consistently will have a huge impact on Perl within a year. Before that, however, there is the FOSDEM Community dinner on Saturday. If you are in Brussels. Enjoy your week! Gabor Szabo |
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Announcements
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by Philippe Bruhat (BOOK) The 16th Perl Toolchain Summit will be held in Vienna, Austria, from Thursday April 23rd till Sunday April 26th, 2026. | 
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Articles
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by Max Maischein (CORION) Otobo is the Open Source Service Management Platform, a 2019 fork of OTRS. |
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Open Source contribution - Perl - Tree-STR, JSON-Lines, and Protocol-Sys-Virt - Setup GitHub Actions
by Gabor Szabo (SZABGAB) One hour long video driver-navigator style pair-programming contributing to open source Perl modules. |
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by Gabor Szabo (SZABGAB) One hour long presentation about 3 pull-requests that were sent to MIME::Lite |
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by Giuseppe Di Terlizzi A new version of SBOM::CycloneDX with support for the OWASP CycloneDX 1.7 specification (ECMA-424). |
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by Robert Acock An excellent writeup on the process of optimization. Basically saying: don't do what you don't have to. This is specifically about optimizing OOP systems in Perl. Feel free to comment either on the bpo version of the article or here. |
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by Laurent Dami (DAMI) Laurent is looking for help with Python and Java for an article series he is writing. Send him an email! | 
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Discussion
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by Rawley Fowler (RAWLEYFOW) Features of Plack-Handler-H2: * Full HTTP/2 spec via nghttp2; * Non-blocking via libevent; * Supports the entire PSGI spec; * Automatically generates self-signed certs if none are provided as args; |
Web
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by Gwyn Davies Gwyn built mojoeye, a tiny Perl app to run system and security checks across their internal Linux hosts. |
Perl
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by Max Maischein (CORION) Corion mentions a number of places where things can be improved. I am surprised that the whole process is not fully automated yet. I mean some of the brightest people in the Perl community work on the core of perl. |
The Weekly Challenge
The Weekly Challenge by Mohammad Sajid Anwar will help you step out of your comfort-zone. You can even win prize money of $50 by participating in the weekly challenge. We pick one champion at the end of the month from among all of the contributors during the month, thanks to the sponsor Lance Wicks.
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by Mohammad Sajid Anwar (MANWAR) Welcome to a new week with a couple of fun tasks "Max Str Value" and "Encrypted String". If you are new to the weekly challenge then why not join us and have fun every week. For more information, please read the FAQ. | 
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by Mohammad Sajid Anwar (MANWAR) Enjoy a quick recap of last week's contributions by Team PWC dealing with the "Kaprekar Constant" and "Unique Fraction Generator" tasks in Perl and Raku. You will find plenty of solutions to keep you busy. |
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by Arne Sommer The article skillfully uses Raku's comb, sort, and flip operations for digit manipulation to offer a straightforward and idiomatic solution to the Kaprekar's ongoing problem. It is both instructive and useful for Raku programmers since it carefully addresses edge cases like non-convergence and shows verbose iteration output. | 
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by Jaldhar H. Vyas The post offers concise and illustrative Perl and Raku solutions to the tasks from Week 357, particularly the Kaprekar Constant implementation with examples that match the problem specification and well-explained iteration logic. For Perl enthusiasts, its clear explanations and references to actual Wikipedia details make the algorithms simple to understand and instructive. |
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by Jorg Sommrey The Kaprekar Constant and Unique Fraction Generator tasks are explained in a clear and organised manner in this post, which also provides step-by-step iteration breakdowns and solid examples to illustrate the problem. For Perl/Raku learners taking on the Weekly Challenge, its solutions demonstrate careful algorithm design and address important edge cases, making it instructive and useful. |
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by Luca Ferrari Luca provides a thorough and systematic collection of answers to the problems issued in all the languages (Raku, PL/Perl, Python and PostgreSQL) and has demonstrated proficiency in both algorithmic reasoning and the use and applicability of various characteristics of each of these programming languages. The articles describe in detail how to implement algorithms logically. As a result, readers are provided with clean and accurate code as examples of how to successfully implement these algorithms through the use of the listed languages. |
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by W Luis Mochan The blog post provides a comprehensive overview of how to implement the Kaprekar Constant and Unique Fraction Generator tasks in Perl. The examples provided demonstrate the idiomatic (one-line) style of coding that is used to represent both of the tasks. Additionally, the post discusses how to handle exceptions such as non-convergence and uniqueness of fractions, in a sensible manner. | 
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by Matthias Muth Matthias's solutions are easy to follow and use a typical hiring challenge style for each week. Each of his solutions adhere to the challenge's requirements. Additionally, all of his implementations demonstrate good programming practices for Perl. |
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by Packy Anderson (PACKY) Packy's write-up for week 357 of the Perl Weekly Challenge offers a fresh perspective on the challenge by telling an entertaining story that incorporates the Kaprekar problem into the write-up. The article clearly details how to implement the code and produces good results as well. The final product is easy to understand and provides a fun, educational experience to those tackling the challenge this week. | 
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by Peter Campbell Smith A thorough explanation of the solution (both tasks) is provided in the post. The Perl code included is easy to read and closely adheres to the descriptions of each problem. Furthermore, the code has been written such that it handles 'non-convergence' where applicable, with clear and logical outputs as well as analyses of each step helping the reader to learn about the algorithms and their correctness. | 
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by Robbie Hatley Robbie has provided full Perl implementations of the Kaprekar Constant and Unique Fraction Generator problems, including clear descriptions and links to the source code for both projects. His article is very well organised and user-friendly, allowing readers to quickly familiarise themselves with both tasks and check out Robbie's own code implementations. |
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by Roger Bell West (FIREDRAKE) The article provides all the vital information you need to comprehend the fundamental algorithms of each challenge, including thorough code sample illustrations, as well as an extensive discussion on iteration behaviour and the reasons you don't want to use floating-point division in programming. |
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by Simon Green (SGREEN) This blog article describes how to perform both Weekly Challenge 357 tasks step by step, showing examples of useful and correct code in both the Python and Perl programming languages, as well as considering input validation and control structures for the Kaprekar constant, as well as selecting the correct data structures to store unique fractions and display them in sorted order. By comparing the differences between the two programming languages alongside their implementation details, this blog is a valuable resource to help those programming these challenges as they learn about them. | 
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by Vinod Kumar K The Kaprekar steps and unique ordered fractions problems are two challenging problems; the author has provided a short list of Perl-based, well-considered solutions to handling leading zeroes, digit sorting, finding loops and sequence detection, and performing value-based ordering of fractions with duplicate removal. These solutions outline the steps taken and lessons learned while approaching each problem. |
Weekly collections
Events
