Perl Weekly Challenge 135: Middle 3-Digits and Validate SEDOL

These are some answers to the Week 135 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 24, 2021 at 24:00). This blog post offers some solutions to this challenge, please don’t read on if you intend to complete the challenge on your own.

Task 1: Middle 3-digits

You are given an integer.

Write a script find out the middle 3-digits of the given integer, if possible otherwise throw sensible error.

Example 1:

Input: $n = 1234567
Output: 345

Example 2:

Input: $n = -123
Output: 123

Example 3:

Input: $n = 1
Output: too short

Example 4:

Opt-in your CPAN repos for Hacktoberfest

If you haven't heard, Hacktoberfest has now become opt-in, to reduce the number of spammy, or pointless, pull requests that people were doing, to get the t-shirt. In this post I'll describe how to opt your repos in, how to find opted-in repos, and why your repo might not be turning up in searches.

So if you've got repos with issues that you'd be happy to receive pull requests on, add the topic hacktoberfest, and make sure that your repo turns up in searches.

Week #080: Smallest Positive Number & Count Candies

Please follow the blog where I discuss the "Smallest Positive Number" and "Count Candies" task of "The Weekly Challenge - 080".

https://perlweeklychallenge.org/blog/weekly-challenge-080

Perl4::CoreLibs y2k20 issue

timelocal, timegm yk20 problem

Perl Weekly Challenge 134: Pandigital Numbers and Distinct Term Count

These are some answers for Week 134 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 17, 2021 at 23:59). This blog post offers some solutions to this challenge, please don’t read on if you intend to complete the challenge on your own.

Task 1: Pandigital Numbers

  • Write a script to generate first 5 Pandigital Numbers in base 10.*

As per the https://en.wikipedia.org/wiki/Pandigital_number, it says:

A pandigital number is an integer that in a given base has among 
its significant digits each digit used in the base at least once.

The Tau Station Kickstarter has gone live! (Oops)

Not words you want to hear late at night before you're going to bed: "we accidentally launched our Kickstarter."

That's right, the Tau Station MMORPG Kickstarter is live and we didn't mean to. However, apparently Kickstarter doesn't allow you to "unlaunch" a campaign.

It may not have been our launch window, but we're owning this.

A man in a strange, orange hazmat suit stands there with a security droid floating over his right shoulder.

Share this!

Tau Station is the world's first Biblio-RPG. It's a massive, immersive, narrative sci-fi MMO. Missions in most games are things like "kill five rabid dogs and get a dagger." BORING. Our missions are rich, immersive, short stories where you control the outcome.

It's 400,000 plus lines of Perl, with a PostgreSQL backend.

Applying Operators to Coderefs

In algebra, there's this pretty funky concept:

(f+g)(x) = f(x) + g(x)

And I was thinking if $f and $g were coderefs, what could $f + $g be?

Where do you like bugs reported?

In my last post, a meta issue for modules: bug tracking, I had noticed a problem with the bug tracking link for a module and discussed that problem. In the comments, one person said he preferred rt.cpan.org. I began thinking about where to have bugs tracked for my modules. Since I have not published one yet, this is something I would like to know. I would like to know the good and bad and ugly of the various systems to make a more educated choice on issue tracking before my first release.

Are there specific issues with GitHub's, GitLab's, or other issue tracking systems making rt.cpan.org the more attractive choice?

On a side note, I prefer reporting issues on sites like GitHub and GitLab since my reply email is hidden and does not get spammed, or at least not yet. However, my cpan.org email address gets a lot of spam, so much spam I had to make a rule to send all email I receive through that address to junk mail. So, should I receive a reply to an issue I opened on rt.cpan, I may miss it since it ends up in my junk mail, which I do not check that often.

Where do you like bugs reported and why?

Perl Weekly Challenge 133: Integer Square Roots and Smith Numbers

These are some answers for Week 133 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 10, 2021 at 23:59). This blog post offers some solutions to this challenge, please don’t read on if you intend to complete the challenge on your own.

Task 1: Integer Square Root

You are given a positive integer $N.

Write a script to calculate the integer square root of the given number.

Please avoid using built-in function. Find out more about it https://en.wikipedia.org/wiki/Integer_square_root.

Examples:

Monthly Report - September

Time just flies.

Hacktoberfest event is back with a bang. I have to be honest, this time I am not as excited as I used to be.

Reason?

Well, ever since I decided to go slow on submitting Pull Request, I find it hard to find anything simple and easy to work with. Another reason, I don't spend much time review latest upload on CPAN. Earlier, I would constantly watch every upload on CPAN and find anything needed helping hand.

Most of my spare time these days dedicated to "The Weekly Challenge", I rarely find time to review any CPAN module. Having said, I still manage to submit just few to keep the continuity. I struggle to even get 2-digits number each month. Last month, I could only submit 6 Pull Request, at least it is better than August.

A private not official branch for Perl 7 by several members of perl porters

I found A private not official branch for Perl 7 by several members of perl porters.

atoomic perl

It was mentioned on the mailing list, but I wrote it here to let more people know.

A meta issue for modules: bug tracking

I was reading a module on meta::cpan when I spied a small issue. I went up to the Issues link, clicked, and was sent to rt.cpan. I know that many module authors now have their modules on sites like GitHub, GitLab, or Bitbucket. Before I posted the issue on rt.cpan, I checked the author's profile for a linked account to one of the other sites. I found the module on GitHub and read the CONTRIBUTING.md to find the author does want issues reported there and not rt.cpan. I did not report my original issue, I reported the link issue instead as it seemed more important.

Today is not the first time I noticed this issue with a module's bug tracking.

Before continuing, I have not released a module to CPAN and am still learning all that goes into releasing one. Please be gentle if I am wrong or stating an obvious well known fact.

Perl Weekly Challenge 132: Mirror Dates and Hash Join

These are some answers for Week 133 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 3, 2021 at 23:59). This blog post offers some solutions to this challenge, please don’t read on if you intend to complete the challenge on your own.

Task 1: Mirror Dates

You are given a date (yyyy/mm/dd).

Assuming, the given date is your date of birth. Write a script to find the mirror dates of the given date.

Dave Cross has built cool site that does something similar.

Assuming today is 2021/09/22.

Example 1:

Input: 2021/09/18
Output: 2021/09/14, 2021/09/26

On the date you were born, someone who was your current age, would have been born on 2021/09/14.
Someone born today will be your current age on 2021/09/26.

Example 2:

Gisle Aas's CPAN distributions are available for adoption

Gisle Aas (GAAS on CPAN) is a well-known CPAN author, who made his first releases back in 1995. Over the years he has developed and maintained a number of keystone modules that most of us have relied on, whether we realised it or not. Gisle has informed the PAUSE admins that he will no longer be maintaining his CPAN distributions, and is open to responsible adoption. In this blog post we'll summarise what distributions are available, and our interpretation of responsible adoption.

If you're interested, please read this post, and if you still would like to adopt a distribution, contact the PAUSE admins (modules at perl dot org) and not Gisle.

while loops that have an index

Perl got this syntax that allow to use a while loop without having to explicitly increment an index by doing an i++. It is made possible by the each function.

Let's demonstrate this in a simple test that check that and array and an array ref contains the same things:

OO linked lists in Perl

After many days, trying to implement linked lists by nested hash (link to Rosetta Code) (link to my code) or Struct::Dumb, I get how to write the (singly) linked list in object-oriented style by Perl. One with bless, another one with Moose. Keep the learning record here.

Updated: See the link in comment section of Tobyink, a showcase of his OO module Zydeco. Thanks Toby!

Updated on 2nd Aug, 2021: Add Object::Pad .

Perl Weekly Challenge 131: Consecutive Arrays

These are some answers to task 1 of the Week 131 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 26, 2021 at 24:00). This blog post offers some solutions to this challenge, please don’t read on if you intend to complete the challenge on your own.

You are given a sorted list of unique positive integers.

Write a script to return list of arrays where the arrays are consecutive integers.

Example 1:

Input:  (1, 2, 3, 6, 7, 8, 9)
Output: ([1, 2, 3], [6, 7, 8, 9])

Example 2:

Input:  (11, 12, 14, 17, 18, 19)
Output: ([11, 12], [14], [17, 18, 19])

Example 3:

Input:  (2, 4, 6, 8)
Output: ([2], [4], [6], [8])

Example 4:

Ubuntu + Perl Web Development Environment Building

I wrote here the steps to build a web system development environment using Perl and Ubuntu.

This is a very convenient procedure if you want to create a web application using Perl.

Ubuntu + Perl Web Development Envrinment Building

Week #079: Count Set Bits & Trapped Rain Water

Please follow the blog where I discuss the "Count Set Bits" and "Trapped Rain Water" task of "The Weekly Challenge - 079".

https://perlweeklychallenge.org/blog/weekly-challenge-079

Crosspost: Nginx/Certbot Recipe

Back in Februrary I posted an article in which I promised a follow up telling you how I now manage my certificates. We’ll all these months later I’ve finally published it to dev.to (to push its reach beyond just Perl) https://dev.to/joelaberger/no-magic-letsencrypt-certbot-and-nginx-configuration-recipe-3a97 .

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