Perl Weekly - all the articles published by Gabor Szabo

http://szabgab.com/

PAUSE: SZABGAB

@szabgab

2011.09.08 in #7 Lessons from running Perl Weekly for the first 6 weeks
This is another article I wrote, this time on my own blog, describing my experience with this list. It might be interesting to you if you'd like to look a bit at the details. I am also comparing the experience with that of Peter Cooper who runs the Ruby Weekly which was the inspiration to this newsletter.
2011.09.09 in #8 Which is the better language to learn Perl or PHP?
I wrote this article in response to a question I got. I tried to make the comparison related to the job opportunities. The article was quite popular but the strange thing was that some of the comments on Google Plus and Twitter related to the relative qualities of the two languages and not the career opportunities.
2011.09.26 in #9 Perl Polls: What articles would you like to read?
I've launched the Perl polls web site with the first poll asking where you get Perl news and what articles would you like to read?
2011.10.29 in #14 Number Guessing game
Partially in response to the discussions about the sad state of the Perl Tutorials I restarted posting my own tutorials. This is the beginning of a simple and stupid game I wrote a long time ago in another country and in another language.
2011.11.03 in #15 Testing a simple Perl module
When starting a new module it is very easy to start writing unit tests from the beginning. In this article, from yours truly, you can learn how to use the Perl testing framework in the most simple way. This article marks the renewal of the Test Automation Tips newsletter. If you are interested, please subscribe.
2011.11.03 in #15 Lots of new entries in the Perl Tutorial
I think in the last week I've published 5 new entries in the Perl Tutorial. They are all more or less equal in importance so instead of pointing out one of them, I am linking to the main page of the whole tutorial.
2011.11.09 in #16 Perl Tutorial: Scalar and List context in Perl, the size of an array
2011.11.15 in #17 How to teach 'Modern' Perl?
People have strong opinion on what Modern Perl means. Unfortunatelly those things don't always work out of the box and sometimes it isn't a good thing to teach those practices at all. At least not as the first experience in tha language. In this article I was trying to discuss some of the issues I see.
2011.11.27 in #18 Beginner Perl Maven
Announcing the first online video course I started to record. This is for people learning Perl. There is a special discount coupon for those visiting this page in the next day or so. Feel free to invite your friends to use this discount. It expires in less than 3 days.
2011.12.07 in #20 Advanced Perl Maven online video course
When I announced the course I offered a 81% discount for 3 days. I'd like to offer this discount to you, the reader of the Perl Weekly as well: Until the 15th December 2011 you'll be able to buy the advanced course for $9 instead of $49 using the 'advanced_intro_9' coupon. The two parts of the Beginner course also have discount codes: 'beginner_15' and 'beginner2_15' respectively for $15 instead of $39 each.
2011.12.22 in #22 7 Curated Weekly newsletters for programmers, sysadmins and what's in between
I posted a list of 7 + 2 newsletter. The JavaScript Weekly and the Ruby Weekly that inspired the Perl Weekly and a few others that had the same inspiration.
2012.01.05 in #24 Minimal requirement to build a sane CPAN package
(szabgab) I encounter people who have already written a module or two and now they are considering uploading them to CPAN or just packaging them for easier distribution. In this article I show the minimal step for a simple pure-Perl module.
2012.01.10 in #25 How to read a CSV file using Perl?
When parsing an CSV file one would probably start using split() just to find out soon that it only works in simple cases. For more complex cases Text::CSV_XS is a much better solution.
2012.01.14 in #25 How to get the Perl Weekly every day?
If you'd like to get the news of Perl weekly even earlier, or if you'd like to recommend individual posts, you can do that through any of 3 social networks.
2012.01.14 in #27 How to get the Perl Weekly every day?
Luckily I recently started to share links to articles as I notice them. That already helps me put together the newsletter. If you are interested to follow, you can do it on Google+, Facebook or Twitter.
2012.01.15 in #25 Use of uninitialized value
Perl can provide various warnings and errors that can be very unclear to people who are new to perl. In this article I try to explain the 'Use of uninitialized value' warning.
2012.01.17 in #26 Global symbol requires explicit package name
This error message is one of the most confusing ones to beginners. In this article I try to explain what should a beginner understand from it.
2012.01.31 in #28 The right way to install CPAN modules
perlbrew? CPAN.pm ? cpanm? apt-get?
2012.02.03 in #28 Perl on the command line
While in most of the Perl tutorial I deal with scripts, here I give a small glimpse into the world of one-liners.
2012.02.04 in #28 Debugging Perl scripts
This is one of the first entries of the Perl Tutorial that gives some simple ideas how to debug Perl code.
2012.02.08 in #29 Automatic string to number conversion or casting in Perl
People coming from other programming languages often have trouble with the automatic string to number conversion in Perl. The comments also mention a couple of strange cases.
2012.02.09 in #29 $_ the default variable of Perl
IMHO for beginners it's quite hard to find explanation on what are the special variables of Perl. Especially $_ is confusing people and search engines. I hope my little contribution helps.
2012.02.10 in #29 Announcing my first Perl e-book
I have been planning to publish my Perl training materials along with the newly written Perl set of articles. This is the first one with the Beginner Perl Maven material.
2012.02.12 in #29 DWIM Perl 5.14 for Windows (v7) released
This is the second DWIM release in a week. The first one was using Perl 5.12 but this one already uses the latest version of Perl and includes more than 400 modules from CPAN.
2012.02.16 in #30 Matching numbers using Perl regex
I took a regex related question I saw on PDX.pm and described how I'd build the regex step-by-step. The string isn't too complex: 'Usage:524944/1000000 messages' but I hope this approach can help people learn how they can go about building a regular expression.
2012.02.25 in #31 What is a Perl Monger group for?
What is the value your Perl Monger group provides you? What would provide you with value that would make it worth for you to join? What does it mean to 'join' a Perl Monger group?
2012.03.01 in #32 TODO March 2012
I do monthly reports on my work and make my monthly plans public. You can also see some statistics about the number of Perl Weekly subscribers on the various channels.
2012.03.03 in #32 How to remove, copy or rename a file with Perl
Showing 3 functions for dealing with files in Perl with the PHP, Ruby and Python counterparts.
2012.03.10 in #33 Extracting data from a file with multi-line records
I was just asked by someone to help with processing a log file. In this article I show 2 solutions. One with a flag the other one with the flip-flop operator of Perl.
2012.03.11 in #33 How to build a dynamic web application using PSGI
This is already the second part of a series of articles introducing Plack/PSGI. The first one is linked from this article. They start off at the basics and we'll see what is interesting for people so I know what to write about.
2012.03.13 in #34 DWIM Perl for Linux server 5.14.2 v2 released
This is the first public release of this experimental package. The objective is to create a package that can be used for development or on a virtual host to develop and deploy applications written in Perl. It will include every important module that regular command line or web applications might need. Your feedback would be highly appreciated.
2012.03.28 in #36 How to create a Perl Module for code reuse?
A simple introduction to creating modules that can export functions.
2012.03.31 in #36 Scalable Vector Graphics with Perl
SVG allows you to create nice and scalable graphics using Perl. I wanted to play a bit with it and while reading the documentation I found some issues. So now I am a co-maintainer of the module. You are more than welcome to send bug reports, failing tests and fixes. You can also see a few simple examples in the blog.
2012.04.02 in #36 Perl Test Automation Training in Madison, Wisconsin and in Kiev, Ukraine
I am running two sets of the shortened, 2-days version of the training class.
2012.04.05 in #37 Simple Database access using Perl DBI and SQL
2012.04.15 in #38 Perl Weekly reaches 3,000 subscribers - two days later
This is a follow-up post
2012.04.26 in #40 Splice to slice and dice arrays in Perl
Part of the Perl Maven tutorial/book.
2012.04.28 in #40 Facebook vs Google+ for Perl projects
Listing the pages and comparing number of followers. If you are on either of those social networks, you might want to check out what pages you could follow.
2012.05.03 in #41 Perl Maven Cookbook
Before you get excited in the wrong direction, this has nothing to do with the Apache Maven. This is the first and admittedly very small edition of the Perl Maven Cookbook. This is also the announcement of the Perl Maven web site I have been planning (and not developing) for half a year now. The Cookbook is given exclusively (and free of charge) to the people who subscribe to the Perl Maven newsletter.
2012.08.10 in #55 Enlightened Modern Perl or useful Perl?
OK, this is not the only link from my sites, but this one is without technical content. It is a dilemma I have. You might want to share your opinion.
2012.09.08 in #59 The most popular Perl web sites
I created a list of perl-related web-sites and checked their rankings using Alexa. Here you can see the most visited sites. A few people were missing their own sites from the list, but actually I was hoping for more people to complain and give me ideas what other sites to track.
2012.09.15 in #60 23+2 Perl based open source products
This is the list of basically all the Perl-based open source products I could find. I used Alexa for ordering them, but that's not the point. The point is to understand the types of products built with Perl and if they are backed by one or more businesses or if they are volunteer based.
2012.09.27 in #62 Announcing the Perl Maven Competition
Some other languages already have it. It's time for the Perl developers to show the world they can also build beautiful applications. The planning has started.
2012.10.07 in #63 Building DWIM Perl for Linux
This is the first step in my attempt to (re)build the Perl distribution that will contain everything you will ever need to build Perl applications.
2012.11.25 in #70 Announcing the Regex Maven for Android
This application (will) help you learn or improve your knowledge of Regular Expression. It has (or will have) a tutorial, a cheat-sheet and a quiz. Currently available for Android, but once it has reasonable content, I am planning to release it to the iPhone as well.
2013-05-05 in #93 Interview with Tadeusz Sosnierz
Gabor Szabo's interview with Tadeusz Sosnierz (aka tadzik),the developer of the Perl 6 Pod Parser and Panda, the Perl 6 module installer.
2013.01.08 in #77 The license and the repository of Perl modules on CPAN
Calling all the CPAN authors to update the META information of their packages including the license field and the link to the repository where they develop the code. If there is one.
2013.01.27 in #80 Core Perl documentation and CPAN module documentation
Gabor Szabo offers a refresher on how to access Perl documentation (both for core stuff and modules).
2013.01.31 in #80 Fetching the status of blog entries using grep and cut
So, you left your blog entry directories 'grow organically', and now you want to tame the resulting unholy mess. Gabor Szabo shows us how he fought entropy with perl, grep, cut, and a good vacuum cleaner.
2013.02.03 in #80 New edition of the Advanced Perl Maven e-book was published
I've updated and released the edition of the Advanced Perl book. People who already purchased (or who attended my advanced course) can download it free.
2013.03.22 in #87 Perl developers and countries
In case you are interested in the distribution of the readers of the Perl Weekly and the Perl Maven site around the world, I published the data from Google Analytics and Bitly.
2013.03.27 in #88 YAPC::NA 2013 training classes
There are going to be 7 courses before and after YAPC::NA in Austin, TX. Check out the schedule and buy your tickets.
2013.05.16 in #95 Interview with John SJ Anderson (aka genehack)
Gabor Szabo is on an interview roll. This time, it's genehack's turn.
2013.05.21 in #96 Perl, Python, Ruby, PHP and HTML5 on Google trends
There are many ways to measure the 'market share' or 'mind share' of a programming language and the dynamics between languages. I tried to see how many people search for the respective terms and what are the trends in relative volume of searches.
2013.06.24 in #100 The first 100 weeks of the Perl Weekly
This is the 100th issue of the newsletter.
2013.07.12 in #103 There are no Perl events in my country/city...
A couple of days ago I saw one of the bloggers complaining about the above. I could not stop myself from writing this.
2013.07.18 in #104 Compiling Perl, Python and Ruby
Comparing the default installation size of the 3 major dynamic programming languages. Perl is the smallest, but Pythons has a lot of batteries included. There are many modules in the standard library of Python, that are missing from from the standard installation of Perl and thus require extra steps to install them from CPAN.
2013.08.01 in #106 Three month after domain name change
Once in a while I collect numbers from various sources trying to see how the Perl Maven site does and compare that with other Perl-related sites, and with sites related to PHP, Python and Ruby. It is unfortunate we don't have the visitor count of the major Perl community sites, but at least you might be able to interpolate from these numbers.
2013.11.18 in #122 Claiming your CPAN authorship at Google
Are you a CPAN author? Do you think that your module is useful? Even to people who use Google as their search engine? Here is a way you can help Google show your module in a more personal way.
2014.01.07 in #133 The Popularity of Perl in 2013
My collection of some numbers. Most interesting are the Google Analytics graphs from blogs.perl.org, MetaCPAN, and search.cpan.org.
2014.02.19 in #135 Sponsoring Perl events by running Perl training courses
Perl events need funding. Developers need training. Companies need more knowledgeable developer. Some of us like teaching and visiting places. A win-win situation. So if you are an organizer, please get in touch, but if you are a would be attendee at one of the events, you could also contact the organizers and ask them about courses.
2014.03.12 in #138 How did PHP and Python take over such a huge market-share of Perl?
In a nutshell: the 'ease of getting started' and 'batteries included' are two keys in those stories and while there are other issues, without solving these two Perl has no chance in getting in the ring again.
2014.04.01 in #141 use diagnostics; or use splain
Gabor Szabo reminds us that Perl can explain itself in more details, if we ask nicely.
2014.04.05 in #141 Fixing CPAN links on Stack Overflow
When answering a question on Stack Overflow, one can link to Perl modules in a way that will break once the module gets updated in the future (which makes us all sad), or in a way that will let all future generations enjoy the bestest and latest version of the module forever. Gabor shows us the difference.
2014.04.29 in #145 GitTip and the Perl Community
In a nutshell, I think if all the people who benefit from Perl contributed back to the community, the Perl ecosystem could do a lot more. So if you cannot contribute time, maybe you can contribute some money. GitTip is an easy way to do so.
2014.05.06 in #146 Thunderclap and the buzz for Perl
Thunderclap allow you to commit to send a specific tweet (or Facebook share) at a certain time in the future. I started a little experiment with it. If you like it, please join the action.
2014.05.14 in #147 Building a blog engine using Perl Dancer
Gabor Szabo showcases a nice primer on Dancer, via the making of a blog engine.
2014.05.20 in #148 One package perl pm file
While you can put more than one package in one .pm file, Gabor Szabo reminds us that we don't necessary want to do that.
2014.06.03 in #150 One year of Perl Maven Pro
Gabor has reasons to celebrate: Maven Pro is now one year old!
2014.07.01 in #154 Perl Maven - June 2014
Just my excuses why I have not published a lot of articles in June with links to the articles and screencasts I did publish... ~szabgab
2014.07.11 in #155 Perl Training and donation to TPF
Need Perl training, and willing to help TPF at the same time? Gabor Szabo has a proposition for you.
2014.08.07 in #159 Catalyst vs Dancer vs Mojolicious on Stack Overflow
I checked the number of posts on Stack Overflow tagged with each one of those: Catalyst: 380, Mojolicious: 213, Dancer: 133. Does this mean anything?
2014.08.14 in #160 perlprogramming.org
Gabor Szabo is the owner of the 'perlprogramming.org' domain, but doesn't really have a use for it. So he's asking if anybody is interested in taking over.
2014.10.18 in #171 Stats of 7 Perl-related web sites
Two weeks ago I created this small table based on the numbers from Google Analytics. The number of monthly users on search.cpan.org was 429,479. On metacpan.org it was 86,013.
2014.10.22 in #170 A clone of search.cpan.org
Gabor Szabo has started an open source clone of search.cpan.org, sco.perlmaven.com, which is built on MetaCPAN's API.
2014.11.03 in #172 Shutting down the Perl Community AdServer
It's time to say farewell... Gabor Szabo lets us know that the Perl community adserver is going down.
2014.11.17 in #174 Web sites with source code for hacking
Gabor Szabo (SZABGAB) has started curating a list of Perl-based web sites for which the source is available.
2014.12.02 in #176 Perl 5 Regex quantifiers
Gabor explains regular expression quantifiers, which specify how many of a given sub-pattern you want to match.
2014.12.11 in #177 Migrating (the Perl Maven site) from Dancer 1 to Dancer2
It took several days but finally the Perl Maven site is running on the new Dancer 2 framework. This article describes the issues encountered.
2014.12.17 in #178 How to set default values in Perl
Do you know how to give a default value to a scalar variable? What about a hash?
2014.12.21 in #178 PSGI the superglue between Perl web application frameworks and web servers
A collection of Perl Maven articles about PSGI, the interface for writing modern web applications in Perl.
2014.12.26 in #179 How to grep a file using Perl
Writing a Perl replacement of the Unix grep command does not have much value, unless you do something much better, or if you want to reimplement the Unix commands in Perl. Nevertheless it can be a good exercise, and it can be a learning or teaching aid.
2014.12.29 in #179 Installing Rakudo Perl 6
After another long break, I have updated the code behind the Perl 6 Maven site and started to update the tutorial as well. This is the first page showing how to install the newly release Rakudo Star on OSX and Linux.
2014.12.29 in #180 Is 2015 going to be the year of Perl 6 ?
I have been on-and-off Perl 6 for quite some time, so after the news about Larry Wall talking about Perl 6 being production ready in 2015 I started to wonder if I should start wrting about Perl 6 again. Judging by the comments on Reddit there are quite a few people who prefer to spew hatered than to be constructive. We'll see.
2015.01.01 in #180 Continuous Integration for Perl 6 modules using Travis-CI
Travis-CI does not support Perl 6 yet, but with this binary version of Rakudo Star you can hook up your GitHub repository and get it smoke-tested by Travis-CI.
2015.01.01 in #180 The Popularity of Perl in 2014
Some stats about the most frequently visited Perl-related web sites including pageview data from the biggest Perl-related web sites.
2015.01.05 in #181 Getting Started with Bailador
2015.01.07 in #181 How to get the size of a file in Perl
Using -s is simple, but looks strange for people not yet familiar with it. There are other, more readable ways to fetch the size of a file.
2015.01.11 in #181 Timestamp and elapsed time in Perl 6
Perl 6 has two separate functions fetching the time since the epoch and they return different results. As of today they are 35 seconds apart.
2015.01.15 in #182 The magic unary plus (+)
2015.01.17 in #182 Introduction to Perl 6 using REPL: scalars
Gabor's Perl 6 odyssey continues, demonstrating working with scalars. I can never remember what REPL stands for, so I googled it (again!) for you: Read-Eval-Print-Loop. It's just an interactive shell.
2015.01.17 in #182 Business Models for Open Source Content
Gabor looks at some of the most successful sites that have a money-making business based off open content.
2015.01.18 in #182 Welcome and Installation
The beginning of an old, and slightly noisy recording of the Perl Maven Video course.
2015.01.21 in #183 What is autovivification?
2015.01.25 in #183 Avoid (unwanted) bitwise operators
2015.02.01 in #185 Code Maven
Yours truly has opened a new playground for himself experimenting with Node.js (JavaScript), Flask (Python), and Ruby. (For now)
2015.02.02 in #185 Introduction to Perl 6: arrays (screencast)
2015.02.03 in #185 How to create an Excel file with Perl?
2015.02.10 in #186 Using the built-in debugger of Perl as REPL
An earlier screencast re-posted on the Perl Maven site.
2015.02.13 in #186 SVG - Scalable Vector Graphics with Perl
Some simple examples showing how to use the SVG Perl module to create Vector Graphics. Then, a related article was published on the Code Maven site using JavaScript to create SVG images, and there is even the beginning of an SVG tutorial with exercises.
2015.02.17 in #187 Don't keep generated files in version control
Files generated by the Perl toolchain, by the editor, an even by the operating system should usually be excluded from version control system. Here is a list of what should be excluded and how to to that.
2015.02.19 in #187 CPAN for older versions of Perl
Some explanation about the CPAN Testers and about cpXXXan.
2015.02.26 in #188 Combining SVG and PSGI
How to create Scalable Vector Graphics on the fly and serve it using Plack/PSGI?
2015.03 in #191 Sending HTML e-mail using Email::Stuffer
A screencast and article explaining and showing how to send e-mail with Perl.
2015.03.04 in #189 Comparing the speed of JSON decoders
Bottom-line: The XS version is 57.42 times faster than the pure Perl version.
2015.03.05 in #189 Creating bar graphs using Perl GD::Graph
13 slightly different bar-graphs from the same data series.
2015.03.10 in #190 Passing two arrays to a function
Just showing one of the uses of references...
2015.03.12 in #190 Moo and required attributes
... and how to convince Moo (or anything else) to give a clear(er) error messages.
2015.03.14 in #190 How to download a Perl module from CPAN
Sometimes you might want to download and unzip a whole distribution without even installing it. There are a number of ways to do this.
2015.03.22 in #191 Testing sessions by mocking time
How can you test a system that is supposed to time-our after 100 days? Your can't wait a 100 days for that. What about 1 minute? Is that still too much?
2015.03.23 in #192 Promoting your Perl workshop or conference?
Gabor has put together a page with some tips for promoting your Perl event.
2015.03.25 in #192 Sending Tweets from a Perl script
In this article full of screenshots you'll see how to write a Perl script to send messages via Twitter.
2015.03.26 in #192 Getting started - Create skeleton for the SCO clone application
A screencast in which Gabor shows the first step in creating a clone of the search.cpan.org web site using PSGI and MetaCPAN as the back-end.
2015.03.31 in #193 Methods, Functions and Subroutines in Perl and what is $self ?
What is the difference between a method and a function in Perl? What is in $self ? And what is $me ?
2015.04.02 in #193 Add some acceptance tests using search.cpan.org
A screencast from the series about the search.cpan.org cloning project.
2015.04.07 in #194 Checking the whois record of many domains
This article uses Net::Whois::Raw for the task.
2015.04.15 in #195 Fetching several web pages in parallel using AnyEvent
How to reduce the download time from 10 minutes to 1 minute?
2015.04.17 in #195 Create skeleton PSGI application for the SCO project
Trying to create a search.cpan.org clone using PSGI as front-end and MetaCPAN as back-end.
2015.04.21 in #196 Using fork to spread load to multiple cores
2015.04.27 in #197 Getting started with MongoDB using Perl - insert and simple update
2015.05.01 in #197 Writing Command line scripts and accepting command line parameters using Moo
MooX::Options is an integration of Moo, the minimal OOP framework for Perl and the Getopt::Long, the standard command line processing module. Reddit
2015.05.15 in #199 Indexing e-mails in an mbox
2015.05.17 in #199 Which CPAN distributions include jquery.js ?
Gabor's continuing his experimentation with an alternative interface for searching CPAN. He's added an interface that lets you find all distributions that contain a given filename.
2015.05.18 in #200 Updating MongoDB using Perl
The second part of the mini-series creating a command-line phonebook using Moo, MooX::Options, and MongoDB.
2015.05.19 in #200 Routing with PSGI
There are several modules that provide URL routing service, but if you'd like to see how they might work behind the scene, this article explains it. Oh and in case you are not familiar with the jargon, 'URL routing' means mapping URLs on your server to function calls that will serve the requested page.
2015.05.21 in #200 Get CPANstats from MetaCPAN using cron
The 12th episode from the search.cpan.org cloning project
2015.05.25 in #201 BEGIN block - running code during compilation
This might be natural to the seasoned Perl developer but the BEGIN block is powerful.
2015.05.26 in #201 Putting the email in MongoDB - part 1
Part of the mailbox indexing project.
2015.05.27 in #201 JSON in Perl
Which module to use to parse JSON in Perl?
2015.05.27 in #201 END block - running code after the application has ended
2015.06 in #205 Concurrent Requests and measuring performance with ApacheBench
2015.06.03 in #202 Bounty for fixing CPAN modules
Gabor pointed out bountysource, a service where you can provide bounties for certain bugs. He wonders if we could use this to get bugs fixed in key distributions?
2015.06.24 in #205 YAPC and Perl Workshop participant numbers
If you ever wondered how many people attend the different workshops and YAPCs, Gabor has compiled a partial list of those events, from 2013 onwards.
2015.06.25 in #205 LWP::UserAgent and Basic Authentication
2015.06.29 in #206 PSGI and AJAX for single-page applications
PSGI is the superglue connecting Perl to web servers. It is rather low level, but there are cases when you need to use that instead of one of the higher level frameworks.
2015.07.05 in #206 Beginner Perl Maven video course
Over 100 episodes have been uploaded to YouTube and are also available for free download.
2015.07.07 in #207 Don't use $a and $b outside of sort, not even for examples
2015.07.14 in #208 Data structure design for fast lookup
People talk a lot about code optimization, some even claim that using single quotes is faster than double quotes, but one of the things that can really matter is the data-structures we use to represent our data. In this article you'll see one example for consideration.
2015.07.17 in #208 Beginner Perl Maven video course
The slidecast Perl tutorial has passed 130 freely available episodes. Available on YouTube or downloadable from the Perl Maven site.
2015.07.17 in #209 Beginner Perl Maven video course
The slidecast Perl tutorial has passed 148 freely available episodes. Available on YouTube or downloadable from the Perl Maven site.
2015.07.17 in #210 Beginner Perl Maven video course
The slidecast Perl tutorial has passed 157 freely available episodes. Available on YouTube or downloadable from the Perl Maven site.
2015.07.17 in #211 Beginner Perl Maven video course
The slidecast Perl tutorial has passed 177 freely available episodes. Available on YouTube or downloadable from the Perl Maven site.
2015.07.20 in #208 Web development using Perl 6
I am preparing a talk with the same title for YAPC::EU. On this page I am trying to collect the existing Perl 6-based web applications. If you find one in your pocket, please let me know!
2015.07.23 in #209 Getting started with AngularJS
In preparation for the front-end development course at YAPC::EU, Gabor started to publish articles on using AngularJS.
2015.07.24 in #209 YAPC::EU - over 200 participants
More than 200 people have now signed up to attend YAPC::EU this year, passing two previous conferences. And there's still a month to go. Gabor points out there are some interesting talks, if you're still thinking about it.
2015.07.30 in #210 Echo text with Bailador using Template::Mojo
2015.08.07 in #211 TODO in AngularJS
The rite of passage entering the land of AngularJS.
2015.08.07 in #212 TODO in AngularJS
The rite of passage entering the land of AngularJS.
2015.08.13 in #212 Reporting diskspace usage on a mail server (screencast)
2015.08.15 in #212 Disk usage: du in Perl (screencast)
2015.08.18 in #213 Sites with public API with CORS - Cross-Origin Resource Sharing enabled
2015.08.19 in #213 Perl 5 Regex Cheat sheet
Quick look-up for the major regex features of Perl 5 with links to detailed explanation and examples.
2015.08.20 in #213 Reading Excel file using Perl
Using Spreadsheet::ParseExcel::Simple and Spreadsheet::ParseExcel, but actually recommending Spreadsheet::Read
2015.08.24 in #214 Vagrant Perl Development Environment (VirtualBox)
2015.08.24 in #214 AngularJS Tutorial
2015.09 in #218 POD - modules processing Plain Old Documentation format
Listing all the modules that handle POD.
2015.09.07 in #216 Data Serialization in Perl
A collection of pointers to Data::Dumper, Storable, FreezeThaw, YAML, JSON, XML, Sereal, and Data::Serializer
2015.09.14 in #216 Becoming a co-maintainer of a CPAN-module - the first steps
A series of articles showing lots of techniques for refactoring Perl code using the excuse of becomming a co-maintainer of Pod::Tree.
2015.09.16 in #217 Perl Dancer book available
All the Perl Maven articles related to Perl Dancer, now bundled in one e-book available. There is a button at the bottom of the page where you can purchase the book.
2015.09.16 in #218 Perl Dancer book available
All the Perl Maven articles related to Perl Dancer, now available bundled in one e-book in MOBI format for Kindle.
2015.09.16 in #219 Perl Dancer book available
All the Perl Maven articles related to Perl Dancer, now available bundled in one e-book in MOBI format for Kindle.
2015.09.16 in #220 Perl Dancer book available
All the Perl Maven articles related to Perl Dancer, now available bundled in one e-book in MOBI format for Kindle.
2015.09.16 in #221 Perl Dancer book available
All the Perl Maven articles related to Perl Dancer, now available bundled in one e-book in MOBI format for Kindle.
2015.09.16 in #222 Perl Dancer book available
All the Perl Maven articles related to Perl Dancer, now available bundled in one e-book in MOBI format for Kindle.
2015.09.16 in #223 Perl Dancer book available
All the Perl Maven articles related to Perl Dancer, now available bundled in one e-book in MOBI format for Kindle.
2015.09.16 in #225 Perl Dancer book available
All the Perl Maven articles related to Perl Dancer, now available bundled in one e-book in MOBI format for Kindle.
2015.09.17 in #217 Travis-CI and latest version of Perl 5
Gabor asked how you can get Travis CI to test with Perl 5.22 and blead. One of the comments directed him to HAARG's Travis helpers, which is the reason why I included this post. Let Graham (HAARG) know if you'd like to see a "latest stable perl" capability in the helpers.
2015.09.19 in #217 Enable Travis-CI for Continous Integration
A simple Travis-CI configuration file.
2015.09.20 in #217 DBI - Database Independent Interface for Perl
The beginning of a page about DBI. Now including all the major DBD modules.
2015.09.21 in #218 XML and Perl
A collection of Perl modules dealing with XML along with a series of articles.
2015.09.24 in #218 http://perlmaven.com/logging-with-log4perl-the-easy-way
Screencast and article
2015.09.30 in #219 Multiple command line counters with plain TSV text file back-end
2015.10.01 in #219 YAPC::EU 2015 Granada - hiking to Pico del Veleta in Sierra Nevada
Gabor's report on his trip to Granada. His depiction of the local tapas alone makes me gnash my teeth and bemoans my absensce at the European YAPC.
2015.10.02 in #219 Vagrant Perl Development Environment v1.1.0 released
Not only it's a Perl Development Environment in a box, but Perl 6's rakudo is also included. Nifty!
2015.10.05 in #220 What is Expect?
Expect is tool to automate interaction with an application providing a CLI (Command Line Interface). Do you need an example?
2015.10.06 in #220 Contributing to the Open Source Perl Ecosystem
A collection of tasks, some are really low hanging fruits, to contribute to Perl 5, Perl 6, CPAN, etc.
2015.10.07 in #220 AUTOLOAD - handling Undefined subroutines
How to avoid ' Undefined subroutine ... called,' errors.
2015.10.10 in #220 Configure Travis-CI for Perl 6 modules
Gabor noticed that most Perl 6 modules on github don't have a Travis config file, so suggests that a PR might be a nice easy way to contribute to Perl 6.
2015.10.13 in #221 The future of YAPC::EU and YEF
2015.10.14 in #222 Programming Exercises
11 beginner level programming exercises with solutions in Perl.
2015.10.15 in #221 Profiling and 100 times speed improvement
In the last couple of months the Perl Maven site became quite slow. Running the profiler quickly pointed at the overuse of YAML. The easy solution was to replace it with YAML::XS.
2015.10.18 in #221 Introducing test automation with Test::Simple
Screencast, the first in a series about Test Automation using Perl.
2015.10.18 in #221 Exercise: Number guessing game
Started to publish a bunch of exercises for beginners. Some of the exercises already have solutions in a number of programming languages.
2015.10.19 in #222 Inconsistencies in YAML implementations
YAML seems to be more forgiving than YAML::XS, YAML::Syck, or YAML::Tiny.
2015.10.23 in #222 Reverse Polish Calculator in Perl using a stack
A 'standard' example for using a stack.
2015.11 in #226 Supporting the Perl Weekly?
Would you like to support the Perl Weekly? Just $1 an issue from each one of the readers would be fine. Is this newsletter worth $1 an issue for you? You can set up a weekly donation via Gratipay.
2015.11 in #226 AngularJS: filter table created with ng-repeat
2015.11.01 in #223 Command line counter with JSON backend
Another entry in the series of counter examples.
2015.11.07 in #224 Common DateTime operations
DateTime is huge, but as with most of other things we only use 10-20% of its capabilities. This article covers the most important aspects of the DateTime module.
2015.11.11 in #225 Test plan and test descriptions
What is the 'plan' in the tests written in Perl?
2015.11.15 in #225 Single Page Application with Perl Dancer and AngularJS
Dancer now allows you to create your own skeleton for new projects. This is a skeleton that makes it easy to create a Single-Page Application. One where your client-side applications talks to the web serve using AJAX.
2015.11.18 in #226 OOP - Object Oriented Perl
An introduction to the classical, hash-based OOP system of Perl.
2015.11.25 in #227 Generate random numbers in Perl with the rand() function
Gabor shows how to generate random numbers in Perl 5, using the rand() built-in.
2015.11.27 in #227 20 most popular Perl modules
Gabor presents the most searched-for modules on MetaCPAN and search.cpan.org, though the figures are slightly dubious, since App::Netdisco comes out top on MetaCPAN!
2015.11.30 in #227 Supporting the Perl Weekly?
Would you like to support the Perl Weekly? A Perl Job ad in the Perl Weekly, like the one above, will reach almost 6000 Perl developers. People like you, who are enthusiastic about Perl and not just use it as an add-on tool.
2015.11.30 in #228 Supporting the Perl Weekly?
Would you like to support the Perl Weekly? A Perl Job ad in the Perl Weekly, like the one above, will reach almost 6000 Perl developers. People like you, who are enthusiastic about Perl and not just use it as an add-on tool.
2015.11.30 in #229 Supporting the Perl Weekly?
Would you like to support the Perl Weekly? A Perl Job ad in the Perl Weekly, like the one above, will reach almost 6000 Perl developers. People like you, who are enthusiastic about Perl and not just use it as an add-on tool.
2015.12.02 in #228 Perl::Critic example - lint for Perl
2015.12.09 in #229 Array references in Perl
A tutorial on using array references in Perl 5.
2015.12.11 in #229 Counter with Dancer sessions
A short tuturial on creating a counter with the Dancer web framework.
2015.12.14 in #230 use Path::Tiny to read and write file
2015.12.17 in #230 shift in Perl
This areticle was published in response to a question on YouTube.
2016.01.01 in #232 The Popularity of Perl in 2015
Thought the title should be probably 'the popularity of Perl-related sites' based on 3 sources: Perl Weekly subscribers; Alexa, and Google Analytics of search.cpan.org, blogs.perl.org, MetaCPAN, and Perl Maven.
2016.01.02 in #232 Email validation using Regular Expression in Perl
While in a real application you'd probably use a module to validate the format of e-mail addresses, parsing them manually is actually a great way to teach regexes.
2016.01.03 in #232 Earn money with your Perl articles
Get in touch by e-mail for more details.
2016.01.09 in #233 How to read an Excel file in Perl
2016.01.19 in #235 Operations on value-pairs in Perl
List::Util has a couple of nice, and slightly surprising functions. For example: pairs, unpairs, pairkeys, pairvalues, pairgrep, pairfirst, and pairmap. Most of them act on pairs of values found in a list or array.
2016.01.22 in #239 Becoming a co-maintainer of a CPAN-module
Three new episodes in the series were re-published: Move packages to their own files, Finish Perl::Critic cleanup, set up Test::Perl::Critic, Eliminating indirect method calls. Enjoy, and support the Perl Maven by subscribing to the Perl Maven Pro
2016.01.23 in #235 Understanding regular expressions
2016.01.29 in #236 The easiest way to find the highest hash value without looping through all of them (max)
2016.01.31 in #236 How to provide STDIN to an external executable?
2016.02.01 in #237 Refactor the tests to use Test::More
As part of becomming a co-maintainer of Pod::Tree I have written a series of articles describing the process and published them for the Perl Maven Pro subscribers. It is time to re-publish them to the general public.
2016.02.05 in #237 Check test coverage - add compile tests
2016.02.10 in #238 Run Perl::Tidy to beautify the code
Gabor shows how you can use Perl::Tidy to ensure your code always followings your layout preferences, even if some of it was written by someone else.
2016.02.12 in #238 Use Path::Tiny instead of home-made ReadFile and WriteFile
When refactoring tests for a module, Gabor noticed functions for reading and writing files. He shows how you can use Path::Tiny for this, and also mentions File::Slurper, which is my go-to module for those tasks these days.
2016.02.18 in #239 An extra space can ruin your day
Space matters in Perl too
2016.02.23 in #240 Fixing the release. Twice in a row! (Pod::Tree 1.22 and 1.23)
Part of the series how to become a co-maintainer of a CPAN-module.
2016.02.26 in #240 Fix Perl::Critic test failures reported by CPAN Testers
What do you when you get failure reports from the CPAN Testers indicating Perl::Critic issues even though everything was fine on your machine.
2016.02.27 in #240 Ajax and Dancer 2
The beginning of a new series building a web application using Dancer as the back-end providing a JSON-based API.
2016.03.04 in #241 Perl::Critic exclude some policies - fix others
Gabor walks through running Perl::Critic at a certain level, while excluding some policies that you might not agree with, or be ready to deal with yet.
2016.03.12 in #242 Simple router with AngularJS
Not Perl, but it was originally published on the Perl Maven site and if you are interested in the full course, it will be given at YAPC::NA.
2016.03.14 in #243 Stand-alone Ajax client and the Access-Control-Allow-Origin issue
Part of the Dancer series.
2016.03.17 in #243 Logging in modules with Log4perl the easy way
Screencast and article.
2016.03.21 in #244 What is the status of the current test script?
Screencast from the Test Automation series
2016.03.22 in #244 Reverse Echo with Ajax and Dancer 2
Article from the Dancer 2 series
2016.03.25 in #244 Distribution directory layout
A screencast from the Advanced Perl Maven course.
2016.03.29 in #245 Separating test data from test code
A screencast and article showing how, once you have a stable test, you can move the test data to an external file and make it accessible to people who are 'domain experts' but not necessarily Perl programmers.
2016.03.30 in #245 How to return nothing (or undef) from a function in Perl?
The Perl Best Practices recommends to call return without any parameter instead of returning undef explictly. That's not always good though.
2016.04.03 in #245 Memoization - speeding up function calls by caching of return values
Memoization, which is basically a fancy name for caching, is not a new idea, but one that can be used in certain situations to speed up function calls.
2016.04.07 in #246 Prove, the harness
A tutorial on use of the prove utility to run your tests during development.
2016.04.11 in #247 Uploading files using Dancer
Dancer makes it quite easy to upload images and files to the server.
2016.04.16 in #247 Moving over to Test::More
A screencast from the Test Automation with Perl series.
2016.04.20 in #248 XML::Writer examples
2016.04.21 in #248 Test diagnostic messages using diag, note, and explain
2016.04.26 in #249 Refactoring Dancer 2 app, using before hook
2016.05.05 in #250 Silencing the noisy Dancer tests
2016.05.12 in #251 Prompt, read from STDIN, read from the keyboard in Perl
Part of the Perl tutorial.
2016.05.13 in #251 Why is Git better than Subversion for Open Source Projects
With a background story about Padre, the Perl IDE.
2016.05.15 in #251 YouTube Channel at 1,000 subscribers
Gabor's YouTube viewership is now in the four digits.
2016.05.18 in #252 Add and retrieve items - MongoDB, Dancer and Testing!
This screencast is part of the Dancer series.
2016.05.18 in #252 Almost infinite recursive template in AngularJS for representing tree structures
2016.05.21 in #252 TODO - testing a bug or a future feature
Gabor shows how you can mark a test as TODO, so it won't stop your distribution installing, but it lets people know that some work remains.
2016.05.27 in #253 Using 'like' to test without exact values
Screencast and article, part of the Test Automation using Perl series.
2016.05.28 in #253 CSV - Comma Separated Values and Perl
I needed a URL I can remember with a snippet of code I can copy and paste when I need to read a CSV file.
2016.06 in #260 Technology, Quality Management, Short Stories, History, and other Podcasts
Just a list of recommended podcasts and how Gabor mixes those with outdoors activity and driving.
2016.06.01 in #254 Private Member Data shouldn't be accessed directly - encapsulation violation
Another useful rule that did not make into the core of Perl::Critic.
2016.06.03 in #254 Use of uninitialized value $got in pattern match (m//) at Test/Deep/Regexp.pm line 57.
undef in a Test::Deep regex
2016.06.03 in #254 Why am I blogging?
Blogging, freefall flaming sword juggling, deep-sea abstract painting. Why some people feel compelled to do those things?
2016.06.06 in #255 Testing timeout with cmp_ok
It is easy to check equality using the 'is' function of Test::More, but how can you check if a number falls between two values? (screencast+article)
2016.06.11 in #255 Set minimum version number in every Perl file
Use the Compatibility::PerlMinimumVersionAndWhy policy of Perl::Critic
2016.06.15 in #256 Three-argument form of open used and it is not available until perl 5.6
Hopefully we all know now why we should use the three argument version of open(). But if you do, you really should include use 5.006; in your code.
2016.07.02 in #258 Add and retrieve elements using jQuery + Ajax
Pert of the Dancer2 series building an Ajax-enabled application, this article shows the client-side JavaScript code.
2016.07.12 in #260 Speed up calculation by running in parallel
Use fork and Parallel::ForkManager to spread load to multiple CPUs.
2016.07.18 in #261 Gabor's YAPC::NA report
Gabor's notes from YAPC::NA.
2016.07.23 in #261 Comparing complex data-structures using is_deeply
How to compare complex data structures in your test cases, using the is_deeply function from Test::More.
2016.07.28 in #262 Deleting item using Ajax request with DELETE and OPTIONS
An episode in the Perl Dancer series that was first published a year ago for the Perl Maven Pro subscribers.
2016.08.06 in #263 Is this IP in the given subnet?
A very nice article & video explaining the usage of Net::Subnet & its pitfalls
2016.08.15 in #264 Core Perl OOP: Constructor
Screencast and article explaining how to create an object using 'bless'.
2016.08.15 in #265 Core Perl OOP: attributes, getter - setter
Screencast explaining getter-setter in core Perl OOP & Moose.
2016.08.16 in #265 Analyzing web application usage
Gabor asked how do you analyze your web application usage, if you have anything to say then please comment on the reddit thread.
2016.08.22 in #266 What should setters return? (Examples with core Perl OOP)
Should it return undef? The newly assigned value? The previous value? The object itself?
2016.08.31 in #267 Forget your plan, just call done_testing
Most Perl 5 testsuites start off by stating how many tests are expected to run; Gabor shows that you don't have to do this, and sometimes that's the easiest way to go.
2016.09.07 in #268 Multiple expected values - testing dice
2016.09.09 in #268 Replace manual HTML generation by the use of Handlebars
2016.09.12 in #269 Implementing 'is_any' to test multiple expected values
In continuation with his previous post, Gabor explains how to implement is_any function to test multiple expected values.
2016.09.17 in #269 Add a date stamp to the items in the database
2016.09.23 in #270 Convert list to table and add jQuery tablesorting with Date column
Part of the Perl Dancer series.
2016.09.25 in #270 Creating a testing module
Part of the test automation with Perl series. (screencast)
2016.09.28 in #271 Basic Authentication with LWP::UserAgent and HTTP::Request::Common
2016.09.30 in #271 Test::Builder object explained
2016.10.04 in #272 Keep data in client and fetch only changes
Front-end code-improvement for the Dancer Ajax project.
2016.10.07 in #272 Organizing a test script with subtests
subtest make it easier to keep your plan intact. (screencast)
2016.10.11 in #273 Improve your chances of survival at Job Interviews and Public Speaking
Some tips on how to prepare yourself for speaking.
2016.10.14 in #273 Jan Henning Thorsen and Marcus Ramberg about Convos, the web-based IRC client
Convos is built on Mojolicious. You can easily set up an in-house web-based chat system, without people even knowing they use the in-house IRC behind.
2016.10.15 in #273 Test for expected warnings
Gabor shows how you can use Test::Warn to test your module for warnings you expect it to emit in certain situations.
2016.10.20 in #274 Missing and outdated CPAN modules in Ubuntu (Debian)
Gabor pointed out that some CPAN modules are missing/outdated in Ubuntu. Reddit thread tells us that there are more. May be lend a hand to Debian Perl group
2016.10.21 in #274 Moose constructor
2016.10.24 in #275 Open Source Conferences
A list of upcoming Open Source related conferences. Many of them still with open call for papers. The source is in GitHub.
2016.10.29 in #275 Moose: Testing the constructor
Screencast
2016.11.11 in #277 Moose: testing the setter and getter
2016.11.11 in #278 Moose type constraints
2016.11.20 in #278 Perl Blaster - get selected videos in your inbox
If you are overwhelmed by the number of online talks, then sign up for Gabor's newsletter to get a refined list of talks.
2016.11.23 in #279 Moose testing type constraint
2016.12.09 in #281 Classes as constraints in Moose
2016.12.19 in #282 Creating subtypes for Moose
Another episode from the old Moose series.
2016.12.19 in #283 What is @INC in Perl?
2016.12.27 in #284 Moose: coerce value to a subtype
Gabor introduces type coercion in Moose.
2017.01.03 in #285 Perl 4 libraries
2017.01.06 in #285 The problem with Perl 4 style libraries
2017.01.11 in #287 Namespaces and packages in Perl
2017.01.14 in #287 Modules in Perl
2017.01.15 in #287 Perl events calendar
You can find more than 200 conferences on the Code And Talk site. 3 of them are Perl-specific and one of them has a Perl track.
2017.01.22 in #287 How does require find the module to be loaded?
2017.01.27 in #288 What is the difference between require and use in Perl? What does import do?
(video)
2017.01.27 in #289 Exporting and importing functions easily
(video)
2017.02.17 in #291 Restrict the import by listing the functions to be imported
Gabor shows how to import just the functions you're going to use, when use'ing a module.
2017.02.21 in #292 Import on demand
Anotother entry published from the the Advanced Perl videos series that was earlier only available to paying members of the Perl Maven site.
2017.02.24 in #292 Always use warnings in your Perl code!
In almost every place where Perl is written by people who are not connected to the Open Source Perl community, they still need to be convinced of the advantages of 'use warnings'. Here you can find a number of examples of what could go wrong if you did not have 'use warnings' in your code.
2017.02.26 in #292 Testing my tests
This is a question: Is there some tool for Perl that would randomly change the AUT and run the tests effectively trying to figure out if the tests would catch those changes?
2017.03.01 in #293 Modules - Behind the scenes
Gabor has a look at some of the core modules that are shipped with Perl itself.
2017.03.04 in #293 Tools to package Perl scripts, modules, and applications
Gabor goes through some of the tools you can use to package your code, for CPAN, or not.
2017.03.09 in #294 Tools to package Perl scripts, modules, and applications
Part of my effort to publish the Perl Advanced videos I recorded a couple of years ago, here are two: Makefile.PL of ExtUtils::MakeMaker and Makefile.PL of Module::Install
2017.03.18 in #295 Current working directory in Perl (cwd, pwd)
Gabor introduces the Cwd module, and shows the differences between the cwd() and getcwd() functions.
2017.03.21 in #296 MANIFEST and MANIFEST.SKIP
Another episode (re)published from the Advanced Perl series that was part of the Perl Maven Pro.
2017.03.25 in #296 Perl related crowdfunding on Kickstarter and ?
Crowdfounding is not exactly a grant, but can be a good way to partially finance some work.
2017.03.25 in #296 Getting started with Rakudo Perl 6 in a Docker container
Just saying Hello World with Perl 6 using the official Docker image.
2017.03.28 in #297 Packaging a Perl script and a Perl module
2017.03.29 in #297 Encrypting Passwords in Perl 6 using crypt
Not a recommendation to use crypt, just a description of an algorithm.
2017.04.02 in #297 Traffic origins of search.cpan.org
2017.04.05 in #298 Packaging with Build.PL
Another old video was republished.
2017.04.07 in #298 Encrypting Passwords in Perl 6 using crypt and SHA-512
Still not the perfect solution for encrypting passwords, but better than the previous one.
2017.04.08 in #298 A test file in Perl
Part of the advanced Perl series.
2017.04.14 in #299 Exception handling in Perl: How to deal with fatal errors in external modules
2017.04.16 in #299 Benchmarking crypt with SHA-512 in Perl 6
As Crypt::Bcrypt is still not installable, making the SHA-512 slow is the best alternative we have.
2017.04.19 in #300 Core Perl OOP: Constructor arguments
2017.04.19 in #300 No Silver Bullet podcast
The first episode of the new podcast by Gabor: How do other companies create high-quality sotware?
2017.05.01 in #301 Blog engine in Perl 6
Yours truly is looking for feedback for the blog engine plan. Both for the technical requirements and for the way to conduct a crowd-funding campaign.
2017.05.02 in #302 Generate Random Text with Perl using Text::Lorem
Just an example.
2017.05.13 in #303 Serving static site using Plack and PSGI
A simple example using Plack::App::File and Plack::Middleware::DirIndex
2017.05.21 in #304 Web Application Development in Perl 6
Crowd funding for a book about Web Application Development in Perl 6
2017.05.29 in #305 Crowdfunding the Bailador book
Gabor continues his crowdfunding campaign to write a book on Web Application Development in Perl 6. He has posted an article on launching the campaign and the first week of the campaign. Bailador now has a web site.
2017.05.31 in #306 Book: Web development in Perl 6
This is the crowdfunding campaign of my book about Bailador, the light-weight route-based web application development framework of Perl 6.
2017.06. in #308 Batteries included - the biggest impact on programming language popularity
2017.06.06 in #307 Blog engine in Perl 6
Gabor is working on a blogging engine in Perl 6, as one of the examples for his book on web application development in Perl 6.
2017.06.18 in #308 Bailador Plans
Read about some plans with the Bailador Project and remember, you have only 3 days left to support the book.
2017.06.22 in #309 Extending the Bailador crowdfunding campaign by another month
Let's give more people and also companies the opportunity to support the Bailador book.
2017.06.24 in #309 Testing PSGI based web applications using Plack::Test
2017.07 in #314 Echo with Plack in CGI mode
2017.07.07 in #383 Hello World with plain CGI
2017.07.12 in #312 Echo with plain CGI
Removing CGI.pm from core Perl did not stop people from wanting to use it. It did not make it less useful, just harder to use. People still ask for help getting started with CGI.
2017.07.13 in #312 Why am I writing the Bailador Book?
2017.07.15 in #312 LWP::Simple - a simple web client in Perl 6
2017.07.30 in #315 Continuous Integration for Perl 6 modules
The modules list of Perl 6 now show both the Travis-CI and Appveyor status of the modules where those are enabled. For the modules that the Continuous Integration is not running yet you can find a link explaining how to set that up. 2 Days ago Appveyor stood at 40. Today at 59. It is now your turn to help the Perl 6 modules run on Windows. UPDATE: The site was updated. It looks much better now, but I am not sure if you can easily find the modules that need help with Appveyor or Travis-CI configuration.
2017.08 in #318 How to forbid certain Perl modules from use?
Using Perl::Critic you can create a list of 'forbidden modules' and even recommend alternatives. This can be very useful in a large team to direct people to the modules recommended by you.
2017.08.27 in #318 Why to have Public Version Control System for Open Source Projects?
2017.09 in #321 Perl Dancer eBook Crowdfunding campaign
Check out the book-cover or go straight to the crowdfundig page
2017.09 in #323 Bumping version numbers in all the modules at once
2017.09.02 in #319 Developer Weekly Newsletter
Gabor is starting another weekly newsletter: this one is going to provide a curated selection of blog posts published by major tech companies. You can sign up at developer-weekly.com.
2017.09.05 in #320 How to get a slice of a hash?
2017.09.12 in #321 Bailador 0.0.12 released and the Bailador Book is progressing
Just updating you on the progress.
2017.09.12 in #321 Possible precedence issue with control flow operator
A relatively new warning in Perl that can help you catch a subtle bug in the code.
2017.09.26 in #323 Perl Dancer eBook: Angular, React, or Vue?
The Perl Dancer eBook was founded and it will be written using jQuery. If you'd like to still support it go ahead. If we reach $7,000 you will get another front-end in the book. Angular, React, or Vue.

2017.10.03 in #324 How to promote a new web site - how to get visitors
2017.10.10 in #325 Fixing test failure on Windows - Properly quoting regexes - Accepting GitHub pull request
2017.10.22 in #326 Perl Infrastructure
What kind of infrastructure is behind the Perl-related web sites? Who are the contact people?
2017.10.30 in #327 Split retaining the separator or parts of it in Perl
2017.11.05 in #328 String eval
2017.11.12 in #329 Testing a tree data structure in Perl
2017.11.13 in #330 Microservices
Recently I was asked to explain what Microservices are. BTW Did you know about Cro the framework for Microservices in Perl 6?
2017.11.16 in #330 Show number of files in a directory tree using Shell
2017.11.19 in #330 Search for hash in an array of hashes
How can you find a hash with a specific key-value pair in an array of hashes? What if you are expecting to find more than one matching items?
2017.11.21 in #331 Show number of files in several directory trees using Shell
2017.11.22 in #331 Have exceeded the maximum number of attempts (1000) to open temp file/dir
A not too common, but rather annoying error.
2017.11.29 in #332 Removal of the current directory (".") from @INC in Perl 5.26 and Travis-CI
2017.12.04 in #332 50% discount on the Bailador Book
2017.12.07 in #333 Open file to read and write in Perl, oh and lock it too
(this was actually added by Upasana herself :)
2017.12.07 in #333 Patreon for Gabor
This was really added by Gabor: Patreon allows you to support a great author, a creator, or yours truly with a monthly patronage of 1, 2, 3, 5, 8... USD. My first goal is to get started with this. With your help I hope to reach it very soon so I can go on to the next goal that will be updating the whole Perl Maven tutorial.
2017.12.12 in #334 Modulino: both script and module in Perl
Sometimes you'd want to allow people to use the functions from your script and sometime you'd like to run your module as if it was a script. Based on the comments on the article and on Reddit, not everybody liked, but I learned that the word was actually coined by brian d foy. I also got some ideas for more use-cases.
2017.12.13 in #334 Patreon and Perl
Patreon allows you to support people with a small monthly payment.
2017.12.16 in #334 Bailador + Dancer SPA + Collab dev bundle
As a Christmas special I am also offering my 3 books in a bundle at a very deep discount.
2017.12.20 in #335 Self testing Perl modules using the Modulino concept
2017.12.24 in #335 Bailador + Dancer SPA + Collab dev = 3 eBooks for the price of one
Just this week.
2018.01 in #341 Sorted hash in Perl using Tie::IxHash
2018.01. in #339 Test Automation Using Perl
2018.01.02 in #337 each - iterate over Perl hash elements pair-by-pair
2018.01.05 in #337 Perl Programming
I have moved my Perl Programming slide to a new URL.
2018.01.08 in #337 New Year's resolutions are the Waterfall methodology
2018.01.10 in #338 Testing Perl CGI application
Unfortunately CGI.pm was removed from Perl, but still many sites use it. This is a simple way to test simple CGI-based applications.
2018.01.21 in #339 Getting Started with Perl::Critic (the linter for Perl)
Perl::Critic can help you potential bugs or just make your code more maintainable.
2018.01.23 in #340 Getting started with Perl on Docker
Docker allows you to create a Linux environment standardized for your project. It makes it super easy to ensure the same environment across all the developers and even in production.
2018.01.26 in #340 How to splice a CSV file in Perl (filter columns of CSV file)
2018.01.28 in #340 Would you like to be a Patr[e]on?
Some people have a single source of income, but then most of what they create belongs to that company. I'd prefer to have a 1,000 patrons who each give a few dollars a month and make most of my work available to everyone. Via Patreon or via PayPal
2018.02.02 in #345 Start writing the Markua parser in Perl
Markua is a Makrdown-inspired language for writing books created by LeanPub. In this article series I am going to explain how I build a Markua Parser in Perl. I need it to make it easier to generate ebooks from the content of the Perl Maven web site.
2018.02.06 in #342 How to change directory (chdir, cd) in Perl?
2018.02.11 in #342 DevOps
A collection of DevOps related topics and the technologies related to them.
2018.02.16 in #343 The Popularity of Perl in 2018 February
The numbers don't look very good though according to David Farrell the perl.com visitors numbers are exploding. I also hope the updating of the Perl Maven Tutorial will have a positive impact.
2018.02.19 in #343 Crowd funding: Updating the Perl Maven Tutorial
I am starting a crowd funding campaign that will allow me to allocate some time to update the Perl Maven Tutorial. Your support would be appreciated.
2018.02.20 in #345 Why does this code not work? (split, array slice)
A problematic piece of code and a solution. If you would like to see it.
2018.02.26 in #344 Updating the free Perl Maven tutorial
Last week I launched a new crowdfunding campaign to provide me with some time and encouragement to update the Perl Maven Tutorial. It had a very good start, but I'll need a lot more people to support it. If for nothing else, to see that you think it is valuable to you or to the Perl community in general. ~ Gabor
2018.03.04 in #345 Ansible
The beginning of a series on using Ansible for Configuration Management
2018.03.05 in #346 Travis-CI for the Markua Parser project
Markua is a Markdown-inspired language for writing books created and used by LeanPub. The Markua parser in Perl 5 was started by yours truly to make it easier to use Markua for writing the articles on the Perl Maven site and then to convert them to eBooks. This article shows how to set up Continuous Integration on Travis-CI. The whole project was started to aid the work once the Perl Tutorial Campaign is successful.
2018.03.06 in #346 Help improving the Perl Maven Tutorial!
You can help the Perl Maven Tutorial and through that many beginner Perl developer either with the content or with the crowdfunding.
2018.03.08 in #346 Add test coverage reporting with Coveralls to Markua Parser in Perl
Another step in the Markua parser project to help the Perl Tutorial crowdfunding.
2018.03.14 in #347 Ansible on Ubuntu in VirtualBox environment - using Python 3
2018.03.15 in #347 Enable Appveyor (CI on Windows) for the Perl 5 Markua Parser
2018.03.21 in #348 Installing Perl and CPAN modules using Ansible
2018.03.29 in #350 Creating a Markua Parser in Perl 5
I've made a lot of progress in the Markua parser and the eBook describing the development process. It became a nice case-study in Test Driven Development and you can get it for almost nothing.
2018.03.30 in #349 Interviews with Perl Developers
10 Interviews with Perl Developers from 2013. Now listed on one page.
2018.04.08 in #350 Useless use of hash element in void context
Just an example for code that can generated the above warning.
2018.04.16 in #351 Profiling part of a Perl application
An example using Devel::NYTProf
2018.04.17 in #352 How to run the tests of a typical Perl module
One of the obstacles in contributing to a Perl module is to know how to get started and how to verify that your changes are correct. Not any more. This article shows how to run the test of a module checked out from its GitHub repository.
2018.04.19 in #352 Variable number of parameters in Perl subroutines
How to implement a subroutine like 'sum' where any number of parameters can be passed and they are 'all the same'.
2018.04.20 in #352 Refactoring Perl code
2018.04.25 in #353 readline() on closed filehandle in Perl
A new entry in the Common Warnings and Error messages in Perl series in which I give examples of code that trigger specific warning and errors in Perl together with alternative explanations.
2018.04.28 in #353 slurp mode - reading a file in one step
How can you find a string in a file that might start on one line and end on another line? It would not be easy to do it if we read the file line-by-line.
2018.05.05 in #354 Introducing CI/CD, Test Automation to your team
Besides editing the Perl Weekly newsletter and writing articles on the Perl Maven site, I also offer services to companies helping them improve their development practices. Primarily I help introducing Test Automation systems (Unit ~, Integration ~, Acceptance tests.) Setting up CI/CD systems. Virtualization. Cloudification. Almost all of my clients came through referrals by people like you. Members of the Perl community. So if your team or company is interested in such a move, you know where to find me.
2018.05.05 in #354 Out of memory!
What really happens if your process tries to use more memory than is available in the computer? An experiment.
2018.05.05 in #354 Using a queue in Perl
Queues are one of the fundamental data structures in the programming world. Here is an example using Perl.
2018.05.05 in #354 Strings in Perl: quoted, interpolated and escaped
2018.05.05 in #357 Introducing CI/CD, Test Automation to your team
If you fight with legacy code and you think there could be a better way, let me assure you there is. You could write tests. You could set up Continuous Integration. You could work much faster and much safer. If you need help with that, talk to me. I offer such help as a service. Both for Perl and for other languages.
2018.05.07 in #355 Split up and flatten a CSV file
I wonder if this was a real task or just the homework assignment of someone and if I've ruined the homework of some Perl teacher now by publishing an answer...
2018.05.20 in #356 How to change @INC to find Perl modules in non-standard locations
2018.05.27 in #357 Command line counter with Memcached
Part of the Counter examples series, a simple example using Memcached.
2018.05.27 in #357 Groovy
Groovy is a JVM based programming language. These few articles are the beginning of a longer Groovy series.
2018.05.27 in #358 Command line counter with Memcached
Part of the Counter examples series, a simple example using Memcached.
2018.06.03 in #358 Groovy
Several new articles were added to the Groovy series.
2018.06.05 in #359 Using Rakudo Perl 6 in a Docker container
Short examples.
2018.06.10 in #359 Do you want to make your developers faster?
Introduce testing. Set up Continuous Integration. Refactor your code. Gabor, the editor of the Perl Weekly, can help you with any of these in Perl, Python, and other languages. Even remotely.
2018.06.10 in #359 Craft Conf 2018 retrospective
2018.06.10 in #360 Do you want to make your developers faster?
Introduce testing. Set up Continuous Integration. Refactor your code. Gabor, the editor of the Perl Weekly, can help you with any of these in Perl, Python, and other languages. Even remotely.
2018.06.11 in #359 SQLite in Memory
A simple example in Perl using an in-memory version of SQLite for when you'd like to use SQL statements, but don't need to store the data on the disk.
2018.06.11 in #360 SQLite in Memory
A simple example in Perl using an in-memory version of SQLite for when you'd like to use SQL statements, but don't need to store the data on the disk.
2018.06.23 in #361 Useless use of private variable in void context
The Useless use of hash element in void context warning that you might get if you follow my suggestion and turn on warnings in Perl.
2018.07.01 in #362 Git workflow for individuals
2018.07.02 in #362 Data Serialization in Perl
2018.07.07 in #363 Multi dimensional arrays in Perl
2018.07.09 in #363 RnD at WeWork
The first entry of a new series on the Code Maven web site trying to understand how RnD works in various hi-tech companies. The first entry is about WeWork.
2018.07.12 in #364 R&D at Graduway
A new episode of the R&D at $company series. Graduway is a small company that provides SaaS products aimed at universities, schools, enterprises, and other organizations.
2018.07.14 in #364 Accessor with type constraint
An older screencast about accessors with Moose.
2018.07.22 in #365 Class as type constraint
Screencast and code snippets.
2018.08 in #368 Enforcing commit message format in Git - on the client side
2018.08.04 in #367 Can't use string (...) as an HASH ref while "strict refs" in use at ...
2018.08.13 in #368 Perl Regex superpowers - execute code in substitution - what are /e and /ee ?
2018.08.15 in #369 Enforce fast forward as merge strategy in Git
2018.08.20 in #369 How to write to the beginning of a file?
2018.08.22 in #370 Jenkins-related articles
Jenkins CLI: create node and Jenkins Pipeline: Add some text to the job using shortText and Jenkins Pipeline: Send e-mail notifications
2018.08.25 in #370 Increase numbers in a file
2018.08.30 in #371 Strings in Perl: quoted, interpolated and escaped
2018.08.30 in #371 gcloud and aws
The Code-Maven site is used as my external persistent memory. I push out code snippets and command snippets that were useful for me. This time some command using the CLI interface gcloud and aws
2018.08.31 in #371 7 of the most useful Perl command line options
I've published this article to give people some pointers, to which I got a few "interesting" comments, including Dave Cross pointing to his 14 years old article which is longer and brian d foy who then posted his additions that also got some "interesting" comments. I did not know that command line options are such a popular topic. Almost competing with opinions about editors and indentation.
2018.09.09 in #372 Testing for no warnings in Perl
2018.09.15 in #373 tmux a terminal multiplexer
I am surprised how many people don't use any terminal multiplexer. So here are my notes.
2018.09.15 in #373 Memory use of sparse arrays in Perl
How much memory does this use? my @a; $a[1_000_000] = 1;
2018.09.15 in #373 Create Digital Ocean Droplet using Terraform
2018.09.24 in #374 Common Warnings and Error messages in Perl
2018.10.08 in #376 Simple Database access using Perl DBI and SQL
2018.10.14 in #377 How to improve my Perl program?
2018.10.27 in #379 Sudoku in Perl
2018.11.04 in #380 Getting Started with Perl::Critic (the linter for Perl)
2018.11.11 in #381 (Test) Automation - CI - CD - DevOps
As you might know my day-job is to help teams improve their development process by introducing Test Automation, CI/CD and other DevOps practices. Mostly I work with local customers, but I have started to work with a remote client and I wish to expand this. So if you feel your organization could get some boost in that area, get in touch with me.
2018.11.11 in #381 Scalar value ... better written as ...
2018.12.07 in #385 Distributing a Perl script using Docker container
One way to distrubute a Perl script embedded in a Docker image.
2018.12.21 in #387 Perl Critic reports
2018.12.29 in #388 Dancer in Docker
An example to create a Docker for Dancer 1 running on system Perl.
2018.12.30 in #388 Perlbrew on Linux (Ubuntu 18.10)
A partially successful experiment to use perlbrew supplied by Ubuntu.
2019.01 in #391 Functions in Bash
Just a few examples on how to use functions in Bash
2019.01 in #393 Limit Bitbucket pipelines to specific branches
Pipelines is the name of the CI SASS solution Bitbucket provides. Here are some configuration tips.
2019.01.18 in #391 Ranking of Perl sites
2019.01.20 in #391 Reading configuration INI files in Perl
How to read an INI file in Perl?
2019.01.23 in #392 The importance of using HTTPS
2019.01.30 in #393 CSV_XS ERROR: 2034 - EIF - Loose unescaped quote @ rec 5 pos 194
An error and how to fix it.
2019.02.16 in #395 A bunch of Perl one-liners to edit HTML files
I know some people will react to this with an automatic response 'never parse HTML with regex'. I wonder though, why talk in absolutes? Isn't it possible that someone might have special cases where the rule can and maybe even should be bended? Asking for a friend.
2019.02.16 in #395 Jenkins
Several new articles were published in the Jenkins series
2019.02.27 in #397 Using the Open Weather Map API with Perl
I like preparing simple, but full examples that can work out of the box. That's why I prepare them when I have the time.
2019.03. in #398 Reading the content of a directory
2019.03.17 in #399 Fast lookup by name or by date - Array - Hash - Linked List
How to design a data structure? That's one of the hard questions in computer science and the answer is: It depends on the usage.
2019.03.24 in #400 substr outside of string at ...
2019.03.31 in #401 Use of implicit split to @_ is deprecated ...
2019.04 in #403 Groovy
Many new entries in the Groovy series
2019.04.07 in #402 Reading and writing binary files in Perl
2019.04.12 in #403 min, max, sum in Perl using List::Util
2019.04.16 in #404 Hash of Arrays in Perl
2019.04.19 in #404 Getting started testing Perl module with Test2
2019.04.22 in #404 Groovy
Many Groovy-releated articles were publish this week.
2019.04.26 in #405 Perl Dancer examples
While for new project you should use Dancer 2 I am currently dealing with an application that is in Dancer 1 so I wrote a couple of examples. I was especially interested writing examples on how to test a web application written in Dancer as having tests allows us to move faster and it allows us to switch to Dancer 2 withot the fear of breaking the system and noticing only after deployment.
2019.04.27 in #405 CLI - Command Line Interface in Perl
A few points on CLI in Perl along with a new post about GUIs in Perl.
2019.04.29 in #406 Upgrading perl on Linux or OSX - installing perl using perlbrew without being root
2019.05.06 in #407 Debugging compile time code (debugging BEGIN block)
It is not a good practice to put a lot of code in a BEGIN block or in the body of a module that gets executed at compile time, but we have all encountered code like that. How can you debug such code?
2019.05.06 in #407 Add (conditional) debugger breakpoints to your code
What if you have a loop that you'd like to debug but only after it passed 10,000 iterations? Use conditional breakpoints.
2019.05.16 in #408 Merge hashes of arrays
2019.05.17 in #408 qx or backticks - running external command and capturing the output
2019.05.27 in #406 Prompt for user input using IO::Prompter
2019.09.13 in #425 Use the same sub as function or as method in Perl
2019.09.30 in #427 Hacktoberfest 2019 and Perl
Some low-hanging fruits of PRs that can help improve the overall health of the CPAN ecosystem.
2019.10.16 in #430 Write YAML file
Just a simple example to copy-paste.
2019.11.03 in #432 Read a YAML file and load it into memory
2019.11.09 in #433 File modify date - When was a file last changed?
2019.11.12 in #434 Epoch - The creation of the world
2019.11.12 in #434 Enable Travis-CI for Continuous Integration
2019.11.19 in #435 Counter example using YAML file to store the data
2019.11.26 in #436 How to print elements of an array in reverse order in Perl
2019.11.28 in #436 CI notification strategy
2019.12.07 in #437 Process the 6 headers of Markua
Parsing Markua, the magical typewriter.
2019.12.07 in #437 Gabor self reporting for 2019.11
2019.12.16 in #438 Exchange values and keys of a hash - how to reverse a hash
2019.12.19 in #439 Collecting errors while parsing Markua in Perl 5 - disregarding empty rows
2019.12.24 in #440 Meetups: Presentations and workshops
2020.01.01 in #441 Gabor self reporting for 2019.12
2020.01.18 in #443 Marketing and promotion
2020.01.26 in #444 Refactor test cases of the Markua Parser in Perl 5
Another part of the Markua parser series was released.
2020.02.02 in #445 Get Coveralls to notify when test-coverage shrinks
Part of the Markua processing series. (Markua is Markdown for writing books.)
2020.02.03 in #445 First impression with Raku
2020.02.29 in #449 Consider everything not recognizable as a paragraph in Markua
Another entry in the Markua parser in Perl series.
2020.03 in #450 Markua resources: Include files
2020.03.13 in #450 Test Automaton Engineer
Many companies are looking for 'Test Automation Engineers' or 'QA Automation engineers' or just 'Automation engineers'. In this post I tried to give you some insight to what you need in order to become one.
2020.03.14 in #451 Test coverage report with Devel::Cover for the Markua Parser
2020.03.29 in #453 On-line workshops and courses
I have been running training courses in class-rooms for ages, but those have a geographical limitation. I ran a few on-line workshops for free, which were great, but they are limited in scope and I run them in Hebrew so probably not relevant to you. I wonder if you'd be interested in workshops or full-length courses I run online for a reasonable fee? The main topics I offer: Docker, Git, GitHub, Linux (Bash), Test Automation, CI (Jenkins, Travis-CI) Cloud, Perl, Python, Golang. Let me know what would be interesting to you and in which timezone are you in by sending an e-mail to gabor@szabgab.com !
2020.03.29 in #453 Generate test expectations for the Markua parser
2020.03.30 in #453 Online Mob programming session for Perl (and maybe also Raku) programmers
As an experiment Thomas Klausner (domm) and myself are going to host a 'Mob programming' session on April 2 Thursday at 15:00 UTC (17:00 CET, 8 am PDT). It will run via Zoom and we'll probably use Cyber Dojo. It supports Perl 5, though it does not support Raku. Yet. I have hopes that by that time the Raku developers will be able to send a PR to the maintainers of Cyber-Dojo or that we'll have an alternative that also supports Raku. If you are interested to join, send me an e-mail (gabor@szabgab.com), and I'll send you an invitation.
2020.04.05 in #454 Code Maven page on LinkedIn
Gabor: I have created a page on LinkedIn that will allow you to get updates of my new posts on both the Perlmaven and the Code Maven sites. Many of those posts won't show up here in the Perl Weekly so you can follow me over at LinkedIn.
2020.04.09 in #455 Get real path (absolute path) from symbolic link (aka. softlink)
Given the name of a symbolic link how can you find out the absolute path to the file it points at?
2020.04.20 in #456 Code-Maven LinkedIn pages in English, Hebrew, and Spanish
I am experimenting with LinkedIn pages so I created 3. One for content in English, one for content in Hebrew, and one for content in Spanish. I would love if you followed at least one of them.
2020.04.21 in #457 Partially hide data fields
like this: '***************pqrs'. See also comments on Reddit including a very good point, that you probably should not store Credit Card numbers. You can probably store the last 4 digits and then show that only.
2020.04.24 in #457 Linux TAB completion of ls
2020.04.28 in #458 Start Git with a local repository
Part of the Git series. Follow Gabor on LinkedIn or on YouTube.
2020.05.02 in #458 How to edit Wikipedia
Follow Gabor on LinkedIn or on YouTube.
2020.05.06 in #459 Perl on YouTube
The major YouTube channels featuring Perl-related videos. Go and follow them!
2020.05.06 in #459 Parse numbered list in Markua
The next part in the Markua parsing series.
2020.05.11 in #459 Interviews with Perl developers
In this playlist I have a bunch of interviews with Perl developers.
2020.05.16 in #460 History in the Perl debugger, make the up arrow work
2020.05.16 in #460 Git on MS Windows
A series of videos teaching you how to use Git on MS Windows.
2020.05.23 in #461 Parse bulleted list in Markua
2020.05.25 in #461 How to use LinkedIn to find a job and to let a job find you in Hi-Tech
This is a webinar I am going to run on Saturday. Register now!
2020.05.30 in #462 Unmatched ( in regex; marked by <-- HERE
2020.05.30 in #462 How to use LinkedIn to find a job and to let a job find you in Hi-Tech
A video recording of the webinar last week.
2020.05.30 in #463 How to use LinkedIn to find a job and to let a job find you in Hi-Tech
A video recording of the webinar last week.
2020.06.07 in #463 Webinar: Job search - DistantJob with Leticia Naranjo
Next week I am going to run a webinar on job search in hi-tech from the point of view of the recruiter.
2020.06.07 in #463 Release the Markua::Parser to CPAN
2020.06.15 in #464 Add attributes to Markua - round 1
Entry in the Markua parser series.
2020.06.15 in #464 Job search - Distantjob with Leticia Naranjo
Webinar scheduled for tomorrow. 16th June 2020 at 8 am PST, 11 am EST, 15:00 UTC. Register
2020.06.19 in #465 Back to YouTube
2020.06.20 in #465 seek - move the position in the filehandle in Perl
2020.06.20 in #465 The goal
2020.06.21 in #465 the curl to Perl challange
The linked web site provdes a tool that can convert any 'curl' command to a 'python' or 'PHP' or even 'R' program. Currently it does not know how to convert to Perl. Would you want to give it a try implementing it?
2020.06.23 in #466 Success on YouTube
2020.06.29 in #466 Meet Pete Sergeant who runs Perl Carrers
Today we are going to have a live chat with Pete Sergean who runs the Perl Careers service to help match companies with Perl developers. There are still a few more places left. Don't miss it. Register here
2020.07 in #469 LinkedIn contacts by programming languages
Comparing the total number of people mentioning Perl in their LinkedIn profile to my 1st level contacts.
2020.07.03 in #467 The importance of blog writing to improve your employability
Improve your communication and story telling skills so when the job interview comes you will be much better at it.
2020.07.03 in #467 Why is marketing so hard for developers? - Feedback
In a nutshell: We programmers are spoiled with fast feedback loops while marketing, promotion, branding need a lot more time to bring us results.
2020.07.05 in #467 tell how far have we read a file
2020.07.05 in #467 Live web sites with editable Open Source source code
One of the best ways to gain experience in web-programming before (and maybe even during) you get employed doing it, is to write your own project or to get involved in an Open Source project. So I created several list. One of them is a list of projects where the source code of a live web-site is available for everyone to inspect and get involved. Some of them already have a short explanation about the technologies involved.
2020.07.07 in #468 Get absolute path (aka. canonical path) using abs_path or canonpath
2020.07.10 in #468 How to contribute to an Open Source Perl project
2020.07.10 in #468 LinkedIn Pages - by language or by topic?
I have now 8 LinkedIn pages. I think I got a bit carried away. The question, shall I group my posts by human language or by topic? Or maybe both?
2020.07.11 in #468 LinkedIn Hashtags and follower counts
If I am already investing a lot of time and energy posting on LinkedIn, I would like to have a bigger impact and reach more people. One way to do that is to use hashtags. So I was really curious how many people follow various hashtags that might be relevant to the subjects I write about.
2020.07.11 in #468 The Perl Foundation, the Perl Weekly, and marketing
Should the Perl Weekly be folded into perl.org?
2020.07.12 in #468 Perl Maven LinkedIn page
If you have an account on LinkedIn, follow this new page where I am going to share code-snippets, examples, and quizzes about Perl. Help me reach others by like-ing the posts.
2020.07.14 in #469 What does an SRE do at Adobe? - Our guest is Rachael Bates
Webinar on July 21st with Rachael Bates who is a Site Reliability Engineer (SRE) at Adobe. register now!
2020.07.16 in #469 Open Source Companies
One of the ways you can improve your chances to get employed is by contributing to the Open Source code-base of a company before you apply for a job. On this page I've started to collect companies that have some Open Source code. A few of them even have Open Source Perl code.
2020.07.24 in #470 Back to Twitter
After being dormant for 4 year the @perlmaven and the @code__maven Twitter accounts woke up with Perl and non-Perl code snippets. The article provides the background.
2020.07.25 in #470 Reading CSV file as many hash-es
Simple examle how to read a CSV file line-by-line as a hash using the values from the first line as the keys and the values from the current line as the values of the hash.
2020.07.25 in #470 LinkedIn polls - first experiment
LinkedIn allows us to post polls with up to 4 possible answers. Here are the results of an experiment.
2020.07.25 in #471 Videos inviting to the Code-Maven and Perl Maven web sites
It seems that the videos were not very successful.
2020.07.27 in #470 Perl Maven on LinkedIn
On the Perl Maven LinkedIn page I share a code snippet with some explanation every day. I have started with two serieses. One of them is about Dancer, the other one just some random but useful snippets of code. Follow it now!
2020.07.28 in #471 Promoting LinkedIn pages
There are several ways to promote a LinkedIn page.
2020.07.29 in #471 How to sync Google calendar with an external calendar?
How to trigger a sync in your Google calendar
2020.07.29 in #471 Supporters
I've updated the list of people who support me via Patreon with the names of all the people who agreed to be in the public. Some of them even told me why are they supporting me.
2020.07.31 in #471 How to contribute to Meta::CPAN
This video was already created by the inspiration and question of one of my Patreon supporters. So even if you don't have time to contribute to Meta::CPAN now, you could support me on Patreon and then I might be able to create a video in response to a question you ask me!
2020.07.31 in #471 Moo with hash reference as attributes - with or without default values
2020.07.31 in #471 Moo with array reference as attributes - with or without default values
2020.07.31 in #621 How to contribute to Meta::CPAN
A while ago I recorded a meta video on how to contribute to Meta::CPAN, as I started to work on similar videos I found it again. Here it is now.
2020.08. in #473 exists - check if a key exists in a hash
2020.08.02 in #471 Gabor self reporting for 2020.07
After 7 month of keeping them to myself, here is a new monthly report. It took time writing it, but it was actually fun.
2020.08.04 in #472 Supporting Perl-related creators via Patreon
Gabor thanks all the supporters.
2020.08.05 in #472 Start using the MetaCPAN API Client to fetch the list of most recently uploaded Perl modules
A short article and video on how to find out more about a Perl module that you are not familar with. It was created thanks to my supporters via Patreon. Support me so I can make more!
2020.08.05 in #472 Goal - Mission Statement
Every business needs a mission statement, even if your business is just to get by while doing (mostly) good.
2020.08.06 in #472 Full-time employment
I've started a series of posts where I write about the various Business Models or Income streams I have or I might have and what are the pros and cons. It is mostly a self-reflection, but might be interesting to others as well.
2020.08.07 in #472 Looking for a job while being unemployed
To be clear, I am not looking for a job, I am just thinking aloud about the others who do from my limited perspective.
2020.08.16 in #473 Fix the documentation of the MetaCPAN::Client
A minor fix that was caught on video. It show that it is quite easy to make small improvements. This post was created thanks to my Patreon supporters. Be one of them!
2020.08.17 in #473 Activity vs. Impact
Measuring the number of videos I record is easy, but measuring how useful the videos are is way more important.
2020.08.19 in #474 Introduction to Template::Toolkit
Just a simple example without any web framework
2020.08.22 in #474 First impression with Raku
In a Docker container.
2020.08.23 in #474 Template Toolkit processing Hash of Hashes
Another plain-text example, this time in response to a question on the Dancer mailing list.
2020.08.26 in #475 Raku Interactive Shell - values in $ variables
I had a lot of articles on the now defunct Perl 6 Maven site. I started to go over them, update them and add them to my Raku series.
2020.08.26 in #475 Long-term contract work
My little series about the various Income streams I had/have that might also help you if you are thinking about leaving full-time employment.
2020.08.30 in #475 Printing hash of hashes of arrays by the array
2020.08.30 in #475 Always check if the regex was successful
This post was born as a response to a question sent to me via email.
2020.09 in #479 Perl modules on CPAN having links to VCS and having CI configured
Look at the top of this newsletter. You'll see some statistics from MetaCPAN. This video explains them.
2020.09.01 in #476 Facebook poll about a Perl-based web app
The results from the two groups surprised me a lot. Which just mean I should not make any assumptions.
2020.09.02 in #476 Gabor self reporting for 2020.08
I am interested both in measuring the things I did and in trying to measure their impact which, in the end, is the more important thing.
2020.09.05 in #476 How to combine arrays to a multi-dimensional array and save them to CSV file
Based on a question from a reader. Thanks to supporters via Patreon.
2020.09.06 in #476 Perl Tk text widget to be used as a console
A screencast using Perl Tk. Thanks to supporters via Patreon.
2020.09.09 in #477 Introducing the Perl Tidy GUI project
The perltidy script allows you to convert your Perl source code to some unified layout. The Perl::Tidy module, behind the scenes allows us to build tools like perltidy. Let's experiment with it so we can try to build a GUI for it.
2020.09.12 in #477 App PerlTidy Tk version 0.01
As promised, I started to work a Perl Tk based GUI to fine-tune your Perl Tidy configuration. The first release is on CPAN. Explanations about Perl Tk and the project are posted to my Patreon supporters.
2020.09.16 in #478 Getting started with Perl on Windows using Strawberry Perl (2020 edition)
I am mostly using Linux as my desktop, but I got a project to improve some Perl code that currently only runs on Windows. So I had to install Windows in a VirtualBox and then Perl. Here is how beginners could get started with that environment. ~szabgab
2020.09.21 in #479 DevOps, CI/CD, and Automation assesment questions
A potential client sent me an e-mail that they are interested in automation and having CI/CD. (Nowadays this became a single entity.) I started to write down some question I need to ask them to understand their current situation and what are their goals.
2020.09.23 in #479 Sponsoring FErki
A video in which I am calling upon you to support the work of Ference Erki (aka. FErki). (See also the Reddit comments
2020.09.23 in #479 Minimal requirements for a blog
A while ago I started to think about a project in which I would implement a blog engine (possibly to replace bpo) and follow the development with screencasts. Now that Davorg started to talk about not having a central blog engine and that he also set up his Perl Planetarium, it might be better to do something else with my time. In any case I am posting the notes I made in case someone else is interested.
2020.09.27 in #479 Supporting Perl Creators vis Patreon, GitHub, and more
2020.10.01 in #480 Gabor self-reporting for 2020.09
2020.10.06 in #481 Hello World with Mojolicious in Docker
Thanks to the people who support the cause to create more Perl-related public content I had the time to record a short video.
2020.10.14 in #482 Visualize Perl class hierarchies as a graph using GraphViz2::Parse::ISA
A quick demo based on the code from the synopsis on the files that come with the distribution/
2020.10.24 in #483 Passing multiple parameters to a function in Perl
Positional parameter in Perl function call; Named parameters for Perl functions - Expecting key-value pairs
2020.10.24 in #483 CPAN Digger
CPAN Digger is an idea to collect and analyze interesting information about CPAN modules and then use that to improve the modules and the Perl code of everyone else.
2020.10.28 in #484 Setup GitHub Actions for CPAN modules
Gabor added another article to his collection. Do you want some fun with GitHub Actions?
2020.11.02 in #484 How to change an element of an array in Perl
2020.11.04 in #485 Checking a GitHub URL for existence
A simple example using LWP::UserAgent to check if a page returns 200 OK, a redirection or 404 not found.
2020.11.05 in #485 CI for CPAN modules
A fast feedback loop is one of the keys to making high quality and valuable software. A Continuous Integration system running your tests on multiple operating systems every time you push code to GitHub can give you the confidence that when you release your code to CPAN, it will not break in the hands of your users.
2020.11.06 in #485 Log::Log4perl layouts and formatting options
Just a small example for future reuse.
2020.11.06 in #485 #Perl on Dev.TO
You are all invited and encouraged to follow #perl on DEV.to and even post articles using that tag.
2020.11.06 in #485 Improving the quality of Open Source projects
I have been talking about this recently quite a lot within the Perl community. It is time to step out of it and start talking about similar ideas for other languages as well.
2020.11.07 in #485 CPAN Dashboard
Dave Cross created a beautiful CPAN dashboard for himself. You can copy his idea easily.
2020.11.10 in #486 I need to create a simple and stupid game for myself
Gabor: I am wasting too much time on a simple and stupid game. I should find or create some other game that is rather simple, but that if I am playing it, it might be actually useful to some.
2020.11.11 in #486 What adding CI to 30 projects revealed
Primarily, that I need to find a way to show how a CI system can benefit CPAN authors to find issues with their code before it reaches CPAN and before they are alerted by the CPAN Testers.
2020.11.13 in #486 Github Actions for Perl running on Windows, Mac OSX, and Ubuntu Linux
One example of how Dave Cross is using GitHub Actions as a CI system.
2020.11.15 in #486 Tests are awesome!
Just being all cheery about writing tests. I really like doing so, as I think they really help.
2020.11.16 in #487 Github Actions for Module::Install and showing error log on Linux, Mac OSX, and Windows
Part of the effort to enable some sort of CI system for all the modules on CPAN this is a sample configuration file for GitHub Actions. It might encourage you to add a GitHub Action configuration file to your project as well.
2020.11.18 in #487 What is CI and why is it good for you?
Screencast
2020.11.20 in #487 GitLab CI Pipeline for Perl DBD::Mock using Module::Build
Although the majority of Perl modules use GitHub there are a few that use GitLab. Some of them have the GitLab CI system enabled, some don't. In this article you can read how DBD::Mock uses CI to see if you can build on that example.
2020.11.21 in #487 Finding an Open Source Python project to contribute to
You can use the same approach to find a Perl project
2020.11.23 in #488 CPAN Digger explained
Gabor shared the internals of CPAN Digger.
2020.11.26 in #488 CPAN Digger - CPAN Dashboard - CPAN Rocks
Screencast showing you around three projects: CPAN Digger by Gabor Szabo, CPAN Dashboard by Dave Cross, both written in Perl and hosted on GitHub pages. Also, CPAN Rocks by James Raspass, written in Raku and hosted on GitLab.
2020.12.01 in #489 Find the first element in an array in Perl that satisfies a condition
Use grep or use List::Util::first
2020.12.01 in #489 Gabor self-reporting for 2020.11
2020.12.02 in #489 New Year's Resolution - every month
I just realized I could use my monthly report to have a new month's resolution and then even if after 2-3 weeks I abandon the commitments, the following month they can start again. Possibly in a new direction.
2020.12.06 in #489 Perl Dancer course
Learn how to develop a web application using Perl Dancer. This course is going to be recorded one video a day during the Advent of 2020. The price will also go up by $1 a day. So if you are interested in buying it, then the sooner the cheaper. Leanpub offers a 45-day, money-back guarantee.
2020.12.06 in #489 Programming Bootcamp for Scientists
This is an introduction to Python for people who have no programming background. It includes the basics and some tools that are needed for Data Science. I teach this course at the Weizmann Institute of Science. The link here is a coupon that will give a deep discount in the next couple of days. Leanpub offers a 45-day, money-back guarantee.
2020.12.06 in #490 Python Programming Bootcamp for Scientists
This is an introduction to Python for people who have no programming background. It includes the basics and some tools that are needed for Data Science. I teach this course at the Weizmann Institute of Science. The link here is a coupon that will give a deep discount in the next couple of days. Leanpub offers a 45-day, money-back guarantee.
2020.12.13 in #490 do
2020.12.14 in #490 Perl Dancer Course
I started it 10 days ago. It was not easy, but so far I have managed to make some progress and record at least one video every day. In the last week, my two courses were the best seller courses on Leanpub. I am quite happy with that and I hope they will remain there for the next week as well.
2020.12.17 in #491 You know Perl. What programming language would you like to learn now?
A poll I am running on my LinkedIn page. There are already over 40 votes. I would like to know how you plan to extend your knowledge. Interesting there were some people who commented Perl 5 which is interesting, it seems to indicate some people are not interested in enhancing their toolset. Maybe they think if they learn another language that will take away from their capability to write Perl. (ps. and you are also invited to follow the Perl Maven page.)
2020.12.20 in #491 Perl Dancer Course
2020.12.20 in #491 Running CGI script as a Plack application with Plack::App::CGIBin
One of my Patreon supporters asked and so here is the explanation on what to do if you have a bunch of CGI scripts and would like to start modernizing them.
2020.12.25 in #492 Perl Dancer Course
The course is now ready for you to watch.
2020.12.30 in #493 Evaluate Perl project for new client - assessment
Recently a number of people have contacted me with various Perl-based projects. I had the opportunity to have an email exchange with them to try to understand what they need and if I can provide the help. A few question came up and for my future reference I wrote them down.
2020.12.31 in #493 Perl Dancer and two Python courses
On the last day of 2020 I opened my new 'school' on Teachable and posted my first three courses. The 'Perl Dancer course', the 'Python Programming Bootcamp', and the new, 'Functional Programming in Python course'. To celebrate the opening and the new year I am offering them at 50% discount. USe the code END-2020 too enjoy it.
2021.01.01 in #493 Gabor self reporting for 2020.12
My personal monthly report with my monthly plans neither of which are probably interesting to you, but it is fun to collect my thoughts. Part of my strategy is to have a New Year's Resolution every month
2021.01.02 in #493 More Perl Maven followers on LinkedIn than #Perl followers
You might not know about the Perl Maven LinkedIn page, but it has just surpassed the #perl hashtag.
2021.01.11 in #494 New Perl Course: Parallel processing in Perl
I have started to record a new course on parallel programming in Perl. I still have plenty to add to the course, but I already wanted to let you know about it and I already wanted to give you access to it. In the coming days you can use the coupon code FORK1 to get 50% discount on the course price.
2021.01.11 in #495 New Course: Parallel programming in Perl
In this course I am showing how to create multiple processes to increase the speed of both CPU-intensive and IO-intensive applications. In a separate post I wrote a few fun things about the course.
2021.01.11 in #495 Which courses to record?
In which I share my struggle to find the intersection of 'the knowledge I can share' and the 'interest of the people following my platforms'. It is not easy for me.
2021.01.12 in #495 Daily Activity
Probably you don't care, but this what I try to do on a daily basis, or at least every 2 days to share a little bit of the knowledge I collected during the years and to gain followers that might one day trust me enough to buy a a training course from me.
2021.01.13 in #495 Refactoring code snippet
One of my readers who does not know much Perl was trying to figure out some Perl code and asked for my help. After looking at the code I thought the best way might be if I show a slightly improved version of the code that is at least partially more readable than the original one.
2021.01.14 in #495 In which subject in Perl do you feel you'd need better knowledge?
The poll I refer to is already closed, but I still would be interested in the topics that are interesting to you.
2021.01.16 in #495 Testing in Perl
New video course for people who would like to make it safter to change code by writing tests.
2021.01.20 in #496 Loop controls: next, last, continue, break
2021.01.24 in #496 Testing in Perl course
During the last week I made some nice progress recording the Testing in Perl course. So if you are a Perl developer who wants to make sure their code works well, this course can help you learn all the tools you need.
2021.01.26 in #497 How to replace a column in a CSV file using Perl
It is quite simple using Test::CSV, but if your file is simple you can also solve this by using split and join.
2021.01.26 in #497 What to do now?
Just trying to figure out priorities.
2021.01.31 in #497 Perl Courses
There are currently 4 Perl courses you can get one-by-one, all of them in a single bundle using a one-time payment or a monthly subscription.
2021.01.31 in #498 Testing in Perl
In this course you'll learn how to write unit and integration tests in Perl so you don't have to worry that something breaks when you make a change in your code or when one of the dependencies changes or when you upgrade to a newer version of Perl.
2021.01.31 in #499 Testing in Perl
In this course you'll learn how to write unit and integration tests in Perl so you don't have to worry that something breaks when you make a change in your code or when one of the dependencies changes or when you upgrade to a newer version of Perl.
2021.02.01 in #497 Gabor self reporting for 2021.01
2021.02.04 in #498 Open learning and coding session
A little background from a few days ago when I was still only thinking about starting to stream why I learn and explore new things and while I develop applications or contribute to Open Source projects. Since then I reached 30 followers on Twitch. Nice start.
2021.02.04 in #498 Exploring BDD in Perl - using Test::BDD::Cucumber - part 1
This was my first stream and it was not kept on Twitch, but you can see it here.
2021.02.05 in #498 BDD - Behavior Driven Development in Perl
Luckily I saw the announcement by Gabor on Twitter about his live video session. I was able to attend the show with few others coming along as well. It was fun watching him playing with BDD.
2021.02.08 in #498 Live learning / Live coding
I am a very late adopter, people have been doing this for a long time, but finally I also started it. I started streaming while I explore new things and write code. You can see the recordings and you can follow me on Twitch (and then you can set it up to send you alerts when I start streaming). I plan to stream frequently in two timeslots. Around 08:00 UTC and 18:00 UTC. I'd love to see you follow me and join me in some of the sessions.
2021.02.12 in #499 Send data to Elasticsearch using Perl LWP::UserAgent
Just a code snippet using LWP::UserAgent to POST data
2021.02.13 in #499 Periodic CI for dormant code
Why is it important to run your CI system even if you don't change your code.
2021.02.14 in #499 Perl Modules with their own websites
Some Perl modules have their own web sites separate from MetaCPAN. I wonder, would it be a good idea to encourage more module authors to create their own web sites? Maybe on GitHub pages?
2021.02.14 in #499 Live streaming while coding
Live streaming while I learn something new to me or while I try to implement something is a really interesting concept, especially when people start commenting on how I can do it better. If you are interested, sign up to Twitch, follow my channel and also turn on notifications so you'll know when I am starting to stream. For example soon I am going to work on turning a simple script into a daemon and then I'll continue working on a Dancer-based front-end to GitLab CI.
2021.02.17 in #500 List::GroupBy
List::GroupBy is a small module converting a list of hashes to some multi-level hash tabele. This is a code-reading video.
2021.02.17 in #500 Rex
FErki taught me a few things about Rex and now we are planning a live session in which he is going to teach me a lot more. Follow my Twitch channel to get notified.
2021.02.18 in #500 Carp::Always to find the source of the problem
In Perl warn and die tell us where a problem was noticed. carp and croak tell us where it was created.
2021.02.18 in #500 Add FAQ entry to MetaCPAN
Some of the distributions on CPAN are marked as 'looking for maintainer'. Test::Class displayed this message, so I asked for it and became the maintainer of that module. Then came the question, how can I remove the notifiaction about the need for a maintainer. In this video you will see how to add this explanation to the FAQ of MetaCPAN and then how to add a link from the notification banner to this entry in the FAQ.
2021.02.22 in #501 GitHub Actions CI job for Perl Test::Class - checking downstream dependencies as well
In this video I went over and explained the CI job I set up for Test::Class to try to minimize the risk of changes. It includes running the tests of several downstream distributions and a scheduled job to ensure upstream changes don't break the module during the time no one is working on the code.
2021.02.22 in #501 What can you do if you become the manager of a Perl development team with a huge legacy code-base?
2021.02.23 in #501 Sets in Perl using Set::Scalar
Do you remember sets and Venn diagrams from school? Have you ever needed set operations while programming? It is rarely needed, but when it is then it is good to know you can use a module in Perl to help you.
2021.02.25 in #501 What return is expected from a function?
Context in Perl: covering the wantarray, function and the want and howmany functions of Want.pm
2021.02.25 in #501 What to do with legacy Perl code?
2021.03.02 in #502 Gabor self reporting for 2021.02
2021.03.04 in #493 In which subject in Perl do you feel you need better knowledge?
OOP? Functional programming? Testing? Web development? I am running a poll asking just that question.
2021.03.07 in #502 CPAN Testers or CI system?
CPAN Testers is a valuable service, but setting up a CI system will help you get earlier feedback and can do certain things that CPAN Testers don't provide.
2021.03.08 in #502 Learn automation using (R)?ex
During this Zoom session FErki, the maintainer of Rex, will teach Gabor how to get started with Rex to manage servers. It is today! You will also be able to ask your questions.
2021.03.22 in #504 Forking, Process ID, Parent Process ID, init
2021.03.22 in #505 Forking, Process ID, Parent Process ID, init
2021.03.24 in #505 Which version of Perl does your non-CPAN code require?
I would love to know which 'new' features (post 5.8) you use. Especially in your non-CPAN code where you don't have to think as much about backward compatibility. If at all.
2021.03.25 in #505 unzip using Archive::Any of Perl
2021.04.02 in #506 Gabor self reporting for 2021.03
2021.04.04 in #506 Generate Calendar in ICal format
This example was written in preparation for the calendar file provided by the Perl Weekly site that contains all the Perl-related events we are aware of from our events page. There is also a calendar file provided by the Code Maven site that include all the live events.
2021.04.04 in #506 Live events
List of live events: Automation with Rex; Web application development with Mojolicious; BDD with Test::BDD::Cucumber.
2021.04.06 in #507 Tenjin templating system
One of my clients is using this module, so I thought I would try it to see how it is being used.
2021.04.06 in #507 Counter with Dancer using in-memory SQLite database
An example trying to show how to use an in-memory SQLite database with Dancer. I wrote this in response to a query by someone, but I am not sure there is any good reason to do anything like this in a real application.
2021.04.08 in #507 Moving from CGI to PSGI and Starman
A full example of a simple CGI script rewritten to be a PSGI script that can be deployed both as CGI - for backward compatibility, and using Starman. The article contains the Rexfile to deploy the whole thing including Apache on an Ubuntu based server.
2021.04.09 in #507 .env - the dot env application configuration file
2021.04.09 in #507 Attribute::Handlers to wrap a function
Mark Gardner pointed to the around modifiers of Moo and Moose as simpler alternatives.
2021.04.09 in #507 Test code which is using fork
2021.04.10 in #507 Perl One-liner: countdown on the command line
I think is the first time I have created an animated gif recording my terminal. Nice.
2021.04.12 in #507 Calendar of live events
2021.04.13 in #508 Live Pair programming
2021.04.16 in #508 Detect recursion using state variables
2021.04.18 in #508 Counter using Dancer2 and Redis in a Docker container
2021.04.19 in #508 Digital Ocean API using Perl
2021.04.19 in #509 Digital Ocean API using Perl
2021.04.19 in #509 Getting started with Git and GitHub
2021.04.26 in #509 Live Pair programming events
The list of past events with video recordings and the schedule
2021.05.01 in #510 Further live events
2021.05.06 in #511 Self reporting for 2021.04
2021.05.07 in #511 Show dates in the timezone of the reader using JavaScript
Front-end solution only based on the post of Mark Gardner.
2021.05.10 in #511 Upcoming live events
There is one today and one tomorrow and more are planned.
2021.05.15 in #512 Registry of 3rd party libraries / packages / modules
2021.05.20 in #513 Developing an application for organising online self knowledge workshops
This is an application written in ReactJS
2021.05.30 in #515 Automation, Dockerization, CI/CD for your team
About 10 days ago I posted on LinkedIn that I am open for new clients that need help in (test) automation, Dockerization, implementing CI/CD, or in code improvements. Especially in Perl or Python. To my pleasant surprise quite a few people upvoted my post, some shared it. I got 7 requests and have already started to work at one of these clients. Nevertheless I still have some extra time and would be also interested to have an overseas client. So if your company needs such help, let's talk.
2021.06.07 in #515 Crystal 1.0 Conference
In my spare time I have been learning Crystal and writing a web application. The result is that I'll be also presenting at the Crystal conference.
2021.06.14 in #516 Create a lexical warning that can be turned on and off with the "warnings" pragma.
2021.06.14 in #516 Crystal part 2 - puts, print, p!, and variable interpolation
2021.06.14 in #517 Create a lexical warning that can be turned on and off with the "warnings" pragma.
2021.06.14 in #517 Crystal part 2 - puts, print, p!
Learning to program in Crystal language
2021.06.17 in #517 Parse paragraphs with Regexp::Grammars
2021.06.18 in #517 Build Docker image in GitLab CI/CD pipeline
2021.06.21 in #517 Recursion in Perl
2021.06.23 in #518 Live Crystal Shardbox development with Johannes Müller (straight-shoota)
2021.06.26 in #518 Testing 3rd party packages on end-user's machine during installation
2021.07.12 in #520 Crystal course starting today
Join Gabor at his Programming Crystal course?
2021.07.19 in #521 Regexp::Grammars parse text with markup or markdown
Parsing text with markup (or markdown) is not easy. It took me several days to wrap my head around this, but eventually I think I've figured it out.
2021.07.19 in #522 Regexp::Grammars parse text with markup or markdown
2021.07.23 in #522 Deep recursion on subroutine
2021.07.23 in #522 Is Gratitude Good for Your Health?
2021.07.24 in #522 Taxi Drivers - Ambulances - Women
2021.07.31 in #523 How deep is a recursion in Perl?
How can you find out the current depth of the recursion?
2021.08 in #523 Gabor self-reporting July 2021
2021.08.0 in #524 Binary search in Perl array
2021.08.04 in #524 The perils of the home-made framework
2021.08.08 in #524 Dropbox CLI - Command line client
2021.08.15 in #525 Returning multiple values or a list from a subroutine in Perl
2021.08.15 in #525 Rescuing an application written in Perl from total meltdown
2021.08.16 in #526 Testing a Docker image created by GitLab CI
2021.09.30 in #532 Delete an element from a hash
2021.10.01 in #532 Gabor self reporting for 2021.09.01
2021.10.04 in #533 Immediate writing to file - flushing in Perl without buffering
2021.10.25 in #535 Bitbucket Pipelines (the CI system) for Perl projects
2021.11 in #537 Perl Tk: The label, button, and entry widgets
2021.11.01 in #536 Bitbucket Pipelines testing Perl projects
There are some other posts about Bitbucket
2021.11.01 in #537 Bitbucket Pipelines testing Perl projects
2021.11.08 in #538 Self report for October 2021
2021.11.15 in #538 Perl Tk: The label, button, and entry widgets
2021.11.15 in #539 Perl Tk: The label, button, and entry widgets
2021.11.21 in #539 Perl Tk: Keyboard and Mouse events
2021.11.29 in #541 Dancer2: Install Perl, editor, Dancer2
2021.12.05 in #541 Language skills and proficiency levels
2021.12.05 in #541 Ladino tomorrow
Ladino, also known as Judeo-Spanish, is the language of the Jews who were expelled from the Iberian peninsula in 1492. It is medieval Spanish mixed with Hebrew, Turkish, Greek, Arabic, Slavic, etc. words. It can be written either with Latin letters or with Hebrew letters. (sample fun word: 'kreatura' meaning small child or baby)
2021.12.13 in #542 Italki number of tutors per language
Looking for conversation partners? Italki is an excellent place where you can find speakers in most of the languages in the world. I put together a page listing some of the languages available on italki along with the number of tutors you can select from.
2021.12.20 in #543 Variable ... will not stay shared ...
What does this warning mean and how to avoid it?
2021.12.27 in #544 Capture STDOUT and STDERR of external program using Capture::Tiny
2021.12.27 in #545 Capture STDOUT and STDERR of external program using Capture::Tiny
2021.12.27 in #545 Learn Yiddish on YiddishPOP
When my kids were small we subscribed to (the Hebrew edition of) BrainPOP and we all loved it. As I can see they have English, Spanish and French editions. They also created this series of introduction to Yiddish. It is cute.
2021.12.29 in #540 Dancer2: Install Perl, editor, Dancer2
2022.01,15 in #547 Measuring progress while learning Ladino
2022.01.01 in #545 Gabor self reporting for 2022.01.01
Covering November-December of 2021 and the plans for 2022
2022.01.10 in #546 Dancer2: Install Perl on Linux and Mac OSX
2022.01.10 in #547 Dancer2: Install Perl on Linux and Mac OSX
Video
2022.01.15 in #547 Yak shaving while learning Ladino
2022.01.23 in #548 LibreLingo development with the author
In this video you see a long pair programming session with Dániel Kántor and Gábor Szabó making some changes to the LibreLingo project. Front-end: Svelte and Bulma. Testing with Cypress.
2022.02.06 in #550 Gabor self reporting for 2022.02.06
2022.02.07 in #550 Dancer2: Hello World
2022.02.07 in #551 Dancer2: Hello World
2022.02.13 in #551 Dancer2: Testing Hello World
2022.02.25 in #553 Common causes and fixes for HTTP 500 Error in Perl CGI scripts
Once in a while someone sends me an email asking for help with some Perl or Perl/CGI project. I don't have time for such work, even if it is paid, so I usually direct them to Stack Overflow for technical help and jobs.perl.org to find someone to the work for them. Sometimes however I am inspired to write up a technical post that can address their problem in a generic way. This is such a post.
2022.03.01 in #584 Multi dimensional arrays in Perl
2022.03.13 in #555 Dancer2: Hello World with Visual Studio Code
2022.03.27 in #557 Open Source translator (instead of Google Translate)
I found a neat open source alternative to Google Translate. Now I am trying to figure out how to find enough text in Ladino to be able to add the Ladino translator.
2022.03.28 in #557 Dancer2: Plackup reload on Windows and Linux
2022.04.11 in #559 Dancer2: Show current time
2022.04.25 in #561 Dancer2: Testing 404 and 500 error responses
2022.05.09 in #563 Dancer2: Process GET and POST requests
2022.05.16 in #564 Dancer2: Exercise 1 - Calculator, Counter
2022.05.16 in #564 My blog in Ladino
2022.05.16 in #565 Dancer2: Exercise 1 - Calculator, Counter
2022.05.23 in #565 Dancer2: Solution: 1 - Calculator
2022.05.30 in #566 Dancer2: Solution: 1 - Calculator fixing
2022.05.30 in #567 Dancer2: Solution: 1 - Calculator fixing
2022.06.05 in #567 Dancer2: Solution: 1 - Counter
2022.06.20 in #569 Dancer2: Show errors during development
2022.06.27 in #570 Dancer2: Logging
2022.07.04 in #571 Dancer2: Route parameters and sending 404 manually
2022.07.17 in #573 Dancer2: More route parameters
Another episode from the Dancer 2 series.
2022.07.21 in #574 Interview with Chris Nandor
2022.07.31 in #575 Dancer2: Exercise 2 - Multi-Counter, Random redirection
2022.08. in #579 Adding first file to your git repository
From the Git on Windows series.
2022.08.08 in #576 Dancer2: Solution 2 - Route-based Multi-Counter
2022.08.15 in #577 Dancer2: Solution 2 - Random redirect
2022.08.17 in #578 Materialize CSS
Materialize CSS is an HTML/CSS framework based on Material Design to create the front-end of web applications. It was created and designed by Google. This is a series of examples on how to use it.
2022.08.17 in #578 Programming Boootcamp for Scientists #1
This is the first part of a video series I am teaching at the Weizmann Institute of Science or wherever I am asked to teach it. It is an introduction to programming (in Python) for biology, chemistry and in general life-science students.
2022.08.21 in #578 Convert any script to a Linux service (daemon)
The sample script is written in Python, but the solution to convert it into a daemon does not take this into account. It can work with any program, including anything written in Perl.
2022.08.24 in #579 Dancer2: Configuration
2022.09 in #582 Programming Boootcamp for Scientists
The 2nd part of the Programming Boootcamp for Scientists was published
2022.09.02 in #580 Dancer2: Sessions
2022.09.05 in #580 ANSI command line colors with Perl
2022.09.09 in #581 Dancer2: Return JSON
2022.09.09 in #581 Getting help for git
Published 2 new entries in the Git on Windows video series.
2022.09.12 in #581 Interviews with Perl Developers
I was doing a lot of cleanup work on my files and on the Perl Maven site and look what I found. Some nice memories!
2022.09.12 in #581 Use of implicit split to @_ is deprecated ...
2022.09.17 in #582 Git on Windows
All 10 parts of the existing short series were published.
2022.09.18 in #582 Go course
Two parts of a short Go course was published.
2022.09.19 in #582 Dancer2: Before and After Hooks
2022.09.19 in #583 Patch rdfind, a C++ project to avoid checksum checking
2022.09.20 in #583 Read section of a file
A simple example using seek and read.
2022.09.23 in #583 Dancer2: Exercise 3 - Simple Single-user TODO list AP
2022.09.23 in #583 Go
A few videos for a planned Go course.
2022.09.24 in #583 Support Gabor via GitHub
Finally I managed to set up my GitHub sponsors page. If you like the stuff that I have been doing, then this is now a good way to support it.
2022.09.25 in #583 Enable GitHub Actions for CI on Math::Polynomial::Chebyshev
A little contribution to an Open Source project.
2022.09.27 in #584 Dancer2: Solution 3 - Simple Single-user TODO list AP
Part of the Perl Dancer course.
2022.09.28 in #584 Programming Boootcamp for Scientists
Published 2 new part of the Python for beginners course.
2022.09.29 in #584 Docker course
Started to publish the parts of the Docker course that was recorded 2 years ago. 4 parts are already public.
2022.10.04 in #585 CPAN Digger and the Hacktoberfest
How to use CPAN Digger to find CPAN packages that need a CI. (A new idea: add the CPAN Cover results to the CPAN::Digger page.)
2022.10.05 in #585 Using GitHub Actions (CI) to locate missing test dependencies in Dist::Zilla::PERLSRVDE
2022.10.05 in #585 Add GitHub Actions (CI) to Graphics-Toolkit-Color Perl module
2022.10.06 in #585 Adding GitHub Actions to Test2::Harness::UI
A detailed explanation of the GitHub Actions configuration file.
2022.10.06 in #585 The value of a clean Continuous Integration (CI) system (for Data-Trace)
Catching Author-test failures
2022.10.08 in #585 Show error logs on Github Actions - Install developer dependencies first (Test::CSS)
2022.10.15 in #586 Ruby Digger
Similar to the CPAN Digger and the PyDigger, there is now a Ruby Digger to locate Ruby Gems that could be improved by adding Continuous Integration
2022.10.16 in #586 Global symbol requires explicit package name
2022.10.16 in #586 Contirbution to Open Source projects
A number of blog posts and YouTue videos on contributing to Open Source projects.
2022.10.17 in #587 CI for CPAN modules
2022.10.19 in #587 Dancer2: Template Tiny
2022.10.24 in #588 Continuous Integration (CI)
A collection of posts about Continuous Integration
2022.10.25 in #588 Dancer2: Template Toolkit
2022.10.26 in #588 Docker course
New parts of the Docker course were published
2022.11 in #593 7 Advent Calendars in 2022
2022.11.01 in #589 Dancer2: Skeleton
2022.11.06 in #589 Separate release branch for App::Puppet::Environment::Updater
It is always interesting to see what is the development and release process of other people. e.g. the git branching and merging policies people have.
2022.11.13 in #590 Docker course
The first part of the Docker course was published
2022.11.19 in #591 Beyond Perl
Thinking aloud about the ways I can server the people who are using Perl.
2022.11.20 in #591 Code Maven Reddit community
I have created a Reddit community for people who are interested to follow the Code Maven site and discuss the topic I cover there. I'd like to invite you to join it.
2022.11.20 in #591 Reporting issues on GitHub (for Perl Advent)
A video to explain how to open an issue to report a bug or some other deficiency in a system. Triggered by a post in the Perl Programmers Facebook group I checked out the Perl Advent-related links on MetaCPAN. One was broken and while trying to figure out what's going on I found 2 more issues.
2022.11.23 in #592 Read dates from Excel file using Perl
2022.11.25 in #592 Videos about Docker
2022.12 in #594 Canadian Municipal GitHub Rankings
While looking for Open source projects I bumped into an interesting listing of government-related GitHub organizations.
2022.12.01 in #593 The 2022 December CI Challenge
You probably already know that I think having CI for any project is valuable. I started a series of blog posts in which every day during December 2022 I am going to describe a pull-request I sent to an open source project adding Continuous Integration to it.
2022.12.02 in #593 Add GitHub Action CI to the Net-Async-Redis-XS Perl module
This is a nice example where you can see how to configure the GitHub Action for some Perl code that uses Redis. The module author ended up accepting my PR and then switching over to CircleCI. Check out the CircleCI configuration in the GitHub repository. I think it was a very nice way to handle the situation: accepting the work even though the author already knew it will be replace.
2022.12.05 in #593 Day 5: CI for Win32-Wlan Perl module
2022.12.09 in #594 Day 9: CI for Mojo-UserAgent-Cached and Plack-Middleware-Greylist
2022.12.09 in #594 63 Corporations that share Open Source code
Since I posted this, I added a lot more corporations. Thanks to contribution of Dean Hamstead as well.
2022.12.14 in #595 Day 14: CI for the Log::Any Perl module 🐪
Simple is good for work. Less exciting for the blog. Check out the previous entries of this series if you'd like to find more exciting cases.
2022.12.16 in #595 Day 16: Moving from Travis-CI to GitHub Actions for Marpa::R2
Do you think tests should always pass or are you in the school that's ok to go for some time while tests are failing. I think it is much better to make sure the test always pass and when they fail to make some intelligent decision. Those who let tests start to fail will most likely start expecting and accepting them to fail and slowly, but surely the tests will loose their value. Jeffrey Kegler, author of Marpa, thinks about this differently.
2022.12.21 in #596 Billions of unnecessary files in GitHub
People seem to ignore the .gitignore file.
2022.12.23 in #596 Day 23: CI using timescaledb a PostgreSQL based time series database
Though this is a Ruby project, it was very interesting (and complex) setting up the Continuous Integration.
2022.12.24 in #596 Day 24: CI for perl5-MIME-Types
2022.12.25 in #596 Day 25: CI for Data::Alias in Perl - including threaded perl
A simple GitHub Action configuration with some twist
2022.12.26 in #597 Set HTTP headers with WWW-Mechanize
2023.01.01 in #597 Views, reactions, and followers on DEV in 2022
A little end of year review on my very short year on DEV. Basically 40 days.
2023.01.17 in #600 one-liner: read first elements of a huge directory
At a client where I work we have a pretty big folder with quite a few files. Trying the list the first few files was an issue with ls and thus I wrote a short one-liner. Then shortened it. I wrote an article about it. Then Aristotle further improved it. It's all there in the blog post.
2023.01.23 in #600 Open Source Development Course for Perl developers
Last week I already mentioned this course that will start tomorrow, January 24th, 2023. In the course we'll learn and practice all the process of contributing to Open Source projects with an emphasize on Perl. We'll learn and practice git/github/pull-request/github pages/testing/test coverage/github actions/etc. You can still register and join the group.
2023.01.23 in #600 Open Source Development Course for Perl developers
Last week I already mentioned this course that will start tomorrow, January 24th, 2023. In the course we'll learn and practice all the process of contributing to Open Source projects with an emphasize on Perl. We'll learn and practice git/github/pull-request/github pages/testing/test coverage/github actions/etc. You can still register and join the group.
2023.01.29 in #601 Command line counter with plain text file database
I have a series of examples called 'counter examples' where I implement a simple counter in various languages and technologies. This one is in Perl.
2023.02.26 in #605 one-liner: remove the same line from many files
2023.03.09 in #607 Finding projects on GitHub: Topics, Languages, and Collections
2023.03.14 in #608 One-liner: Remove first two characters of every line in thousands of files
A very simple problem for someone who knows Perl. So it was posted on a forum where few people know Perl.
2023.03.18 in #608 The problem with open source: not enough contributors
I have a feeling that there are not enough people contributing to open source, but GitHub reports to have 94M users. Am I mistaken or is that number misleading?
2023.03.19 in #608 GitHub Actions and Workflows
The name 'GitHub Actions' reffers to two different things. One of them is also called 'GitHub Actions Workflows'.
2023.03.21 in #609 Fixing code and documentation, setting up CI - Sending Pull-Requests
You might have heard about the Open Source Development Course I teach. During one of the most recent meetings we worked on a Perl module. You can also check the web site of the course and the GitHub repo where you can find the links to the video recordings.
2023.05.22 in #617 The risk of Open Source vs. proprietary 3rd party libraries
Using 3rd party libraries always have risks. If you buy them from a company you might have the fuzzy feeling that you will be supported no matter what. If you use Open Source you might be exposed to risk that a purchase of propriatary package hides from you.
2023.05.23 in #618 The risk of using Open Source libraries - do you have the source code?
This is part of a series discussing the risks and costs of using Open Source 3rd party libraries. That is, CPAN modules in Perl.
2023.05.29 in #619 GitHub Actions for CPAN modules
Why to have CI in general? Why to use GitHub Actions?
2023.06.18 in #621 Contributing to Open Source Software: VS Code (Visual Studio Code)
2023.06.25 in #622 Only internally vetted and approved Open Source libraries can be used
Part of a new series of articles on the OSDC web site. I also repost them on dev.to to make it easy to comment on then, and if you'd like to discuss the topics, I'd like to invite you to the OSDC Community. See next entry:
2023.06.26 in #622 Why contribute to Open Source?
2023.06.28 in #623 How to get started with open source contribution?
2023.06.29 in #623 A small contribution is still very valuable
People often think that in order to contribute to an open source project you have to be some kind of an expert. Far from it. There are plenty of things one can do even with very little knowledge. Here I contributed a one-line change to the documentation of a Rust library even though I have only started to learn Rust. If I could do it I am sure all of you can.
2023.07.09 in #624 Learning Rust
I have been learning Rust for a month now. It is hard. Learning any programming language is hard, but as I read elsewhere Rust has special difficulties. In any case it is interesting, well at least to me, to look back and try to understand how I learn.
2023.07.10 in #624 How to send your first Pull-Request (fixing content on the PerlMaven site)
Have you ever wanted to learn the process of contributing to an open source project. These days the heart of it is sending a pull-request. A few years ago I recorded this video explaining how to edit a page on the Code-Maven web site. The PerlMaven web site uses the exact same technology so the same applies there too. This can be a good way to practice sending pull-requests before you get involved the programming part. Please also 'like' the video and follow the YouTube channel!
2023.07.22 in #626 First report: More than 80% of the crates link to their public VCS
I have been working on the Rust Digger for more than a month. This is the first report I created.
2023.08.16 in #630 Selectively ignore warnings (turn them off using 'no warnings')

If you are not yet subscribed, you can do it now. Free of charge:

Just ONE e-mail each Monday. Easy to unsubscribe. No spam. Your e-mail address is safe.

This newsletter is about the Perl Programming languages.