blogs.perl.org

• Reviewed recent mailing list threads - multiple namespaces, moose + warnings conflicts. Determined there’s not a lot the perl core can do (at the moment)

• Reviewed PR#21532 (Module loading function)

• SSL out of the box still needs someone to project manage whatever various bits need to be done. A specific email on the subject will be sent to the list.

• PR#18059 to fix up perl version number macros is still outstanding and needs fixing up so it can be merged

These are some answers to the Week 266, 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 April 28, 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: X Matrix

You are given a square matrix, $matrix.

Write a script to find if the given matrix is X Matrix.

A square matrix is an X Matrix if all the elements on the main diagonal and antidiagonal are non-zero and everything else are zero.

Example 1

This week we discussed the following topics:

• load_module has a PR in progress; needs continued nudging on a few last issues so we can move forward and merge it
• Pod “U<..>” for underline has better docs; again that could possibly be merged now if all are happy
• We spent further time thinking about other ideas for extending and improving Pod: further details may be published in due course
• We briefly discussed how to break the logjam on PPC0013 and continue work on join/etc…

In the second part of this series about fast parsers for sequencing applications,  I will review the code for the regex based parser. This is shown below (I use v5.38, as you should! because the year is 2023 and you should not have to type use strict; use warnings)

Hello everybody! For this week's weekly challenge I thought the challenges looked really easy, but they both had a couple slight complicating factors. Also, this was the first time I've used sub signatures.

Similar Words

For this one, we're looking for words that share all characters. We print out each pair of countries.

After written about the origin and goals of Graphics::Toolkit::Color -- let's take a look at the public methods and make it a little study of good API design. But lets work our way up from a few examples:

This week we discussed the following topics:

• Module::CoreList is still somewhat awkward and manual to update around releases. We need better instructions and possibly some automation around the simpler
• Pod’s new U<> format needs more documentation around its limited availability.
• Test2::Suite sometimes spuriously fails in perl core; needs some poking
• We should put out a call for bugfixes for a possible 5.38.1 release

I don't really keep up with online resources, and I blogs.perl.org to be (like perl) a nice and stable home. I've watched resources come and go - I've lost untold content in the process (geocities, myspace, LtU, hello??).

I recently discovered dev.to because of a nice benchmarking article published by a long standing community member:

Benchmarking Perl Core Class in v5.38 By John Napiorkowski

https://dev.to/jjn1056/benchmarking-core-class-573c

So I guess this is like some kind of substack for developer blogging? I only recently discovered that resource also.

Crossposted from my blog

My upgrade of my home server from Debian 11 ("bullseye") to Debian 12 ("bookworm") went almost without a hitch. Yesterday I realized that the Postgres data hadn't been migrated from the old DB to the Debian package of Postgres 15. But luckily, the good Pg people provide a Debian package of 9.6 (the version which held my data) for Debian 12. I could install that one, fire it up, dump all data into SQL, fire up Pg 15 from Debian and import it there. Now I run such an SQL dump daily, just to have the data available as SQL files.

I wonder if it would be worthwhile for Perl to provide prebuilt binaries/packages of old Perl versions for current OSes, but then, there are so many build options that it's not worth the effort in general.

I noticed the other day we had an old utility script txt2html.pl that gave a warning
/usr/local/bin/txt2html.pl
$* is no longer supported at /usr/local/bin/txt2html.pl line 1512.
Apparently $*=1 was how multi-line regex searching was done in old perls.

$a =~ m /foo/ms;

$ sudo cpanm HTML::TextToHTML

In my google search on the warning, I found this call for help:
https://github.com/resurrecting-open-source-projects/txt2html/blob/master/CONTRIBUTING.md
so added a github Issue and emailed the author saying the updated and migrated txt2html.pl was already available on CPAN.

All three of us returned. We talked about

• Getting a Perl 5.38.1 maint release out of the door
• How to progress Pod format improvements (i.e. U<>)

These are some answers to the Week 266, 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 April 28, 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: Uncommon Words

You are given two sentences, $line1 and $line2.

Write a script to find all uncommon words in any order in the given two sentences. Return ('') if none found.

A word is uncommon if it appears exactly once in one of the sentences and doesn’t appear in other sentence.

Example 1

Input: $line1 = 'Mango is sweet'
       $line2 = 'Mango is sour'
Output: ('sweet', 'sour')

Example 2

Introduction

I have been leaning very heavily on Perl's prototype feature for creating new modules. The imptetus for this can traced back to the day I looked at the source code for Try::Tiny, and realized that it was implemented using prototypes. The main reason for using prototypes for many new modules I've created recently is my focus on making a thing I do repeatedly available in a more Perlish or idiomatic way.

Required reading if you have not and are about to dive into an article about prototypes: Far More Than Everything You've Ever Wanted to Know about Prototypes in Perl by Tom Christiansen.

The following article demonstrates 2 CPAN modules I have written that focus more on Perl programmer UX and why Perl prototypes can provide a way forward for a great many ideas that people have. Prototypes misunderstood, yes; but more so, they are misunderestimated. They are infact, very powerful and when used for their intended purpose; a lot of hand wringing can be avoided during feature discussions.

Hi all,

Please note that Komodo IDE is now open source. Komodo IDE is a very feature-rich Integrated Development Environment (IDE). Basically a sophisticated source-code editor. Notable features why I used Komodo IDE:

• Syntax highlighting
• Code intelligence (autocomplete, code refactoring etc.)
• Run and debug programs easily
• Debug with breakepoints and inspect the variables and their values in the GUI
• Integrates with version control

You can read more about Komodo IDE here.

The blog post announcing Komodo IDE going Open Source is here.

The blog post also contains an explanation why it is made open source. One of the reasons is that there is already a lot of free and good editors available, e.g. Visual Studio Code. Though, as I was using Komodo IDE for at least 7 years now, I still very much like it and it’s OOTB feature set.

Hi everybody! In this week's weekly challenge, we're searching for anything but the minimum or maximum in a dataset, and searching for senior citizens on a plane.

Min And Max

This challenge is a very interesting one, because obviously the easiest solution in terms of development is to sort and filter the first and last element. However, that is O(n log n) and it's very little added complexity to do the O(n) solution with a single-pass filter.

These are some answers to the Week 265, 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 April 21, 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: Completing Word

You are given a string, $str containing alphanumeric characters and array of strings (alphabetic characters only), @str.

Write a script to find the shortest completing word. If none found return empty string.

A completing word is a word that contains all the letters in the given string, ignoring space and number. If a letter appeared more than once in the given string then it must appear the same number or more in the word.

Example 1

DBD::SQLite 1.73_01 (with SQLite 3.42.0) is a release candidate for the next stable DBD::SQLite. This release is mainly to upgrade the bundled SQLite library.

I'll wait for about a month and release 1.74 in the middel of September if there's no blocker nor request to wait for more. Thank you for your patience.

This week, for its first meeting, the new PSC:

• discussed the nature of typing systems for Perl and what properties we find desirable vs not
• worked out a release schedule for the next few months of devel releases
• reviewed the PPC Tracker document. A few are now done, the rest need remainder nudge emails to their respective proposers