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Perl tutorials and courses
- Perl Tutorial just a plain Perl tutorial. Nothing fancy.
- Beginner Perl Maven video course slidecast of the training material.
- Advanced Perl Maven video course mixed slidecasts, screencasts and plain articles.
- Test Automation using Perl for people who really want to sleep well.
Modern Perl Web Frameworks
- Mojolicious light-weight web framework with rainbows and unicorns.
- Perl Dancer light-weight web framework to rock.
- Catalyst The MVC web framework of Perl.
- PSGI/Plack, the low-level superglue between Perl web application frameworks and web servers.
- CGI, the Common Gateway Interface, for old-school web applications.
Object Oriented Perl
- OOP, the classic way to write Object Oriented Perl code.
- Moo, the Minimalist Object Oriented system for Perl.
- Moose, the 'post modern' Object Oriented system for Perl.
Other Series
- Perl and MongoDB, the NoSQL database used in Perl programs.
- AnyEvent, asynchronous programming.
- Net::Server the framework to build TCP/IP servers.
- MetaCPAN - articles for CPAN users, CPAN authors, client developers, and MetaCPAN developers.
- Perl Maven TV Show is a collection of interviews with Perl developers.
- SVG - Scalable Vector Graphics
Projects and Collections
- The search.cpan.org cloning project - Implementing a CPAN search engine using Plack/PSGI with MetaCPAN back-end.
- Command line phonebook with MongoDB and Moo
- Indexing e-mails in an mbox
- Counter Examples Various solution on the simple task of building a counter.
- Becoming a co-maintainer of a CPAN module - refactoring a CPAN module
- Perl::Critic lint-like static analyzer for Perl.
Code-Maven series
- Angular JS
- Handlebars the HTML templating system written in JavaScript.
- JavaScript
- NodeJS
If you are a beginner, or would like to refresh your Perl programming knowledge,
you can go over the Perl tutorial or watch the
Beginner Perl Maven video course.
If you need to maintain a large piece of software written in Perl by other people in the last 5-10-15 years,
that's a challenge. Especially if you did not get proper training in Perl. You are probably limited to
a specific and old version of Perl. Check out, the Perl tutorial!
You can probably skip the part about installing Perl, but the rest of the tutorial will be relevant for you.
Perl is often used in Test Automation. If you work in this field, or if you'd like to work in this field
(it is much more fun to find bugs in other people's code than in yours :), then you can read the Perl tutorial
and the series on Test Automation using Perl.
If you build new web applications - either privately or inside a company - you can start by reading the
article comparing CGI, mod_perl and PSGI. From there you can go on reading
the generic Perl tutorial or the articles on
Mojolicious, Perl Dancer, Catalyst,
PSGI/Plack, or even CGI, the Common Gateway Interface, for old-school web applications.
Recent Articles
Split up and flatten CSV file
Given a CSV file like this:
examples/plain.csv
a,b,c d,e,f g,h,i
How can you convert it to a file like this:
examples/flattened.csv
a b c d e f g h i
Out of memory!
A recent discussion made me want to see what happens to my Perl script if it tries to use more memory that available to it. I tried it on Mac OSX and Ubuntu Linux running in a VirtualBox launched using Vagrant.
Pro: Forking, Process ID, Parent Process ID, init
The init-system for Linux went through several iterations. The article Initializing and Managing Services in Linux: Past, Present and Future explains it quite well.
In this example we'll see how can we see the process ID and parent process ID of a forked process in Perl, and what happens if the parent process exits before the forked process.
