Perl Maven

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Perl tutorials and courses

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

Projects and Collections

Code-Maven series

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

Process status in SQLite

In our home made Continuous Integration system we wanted to make sure there is only one process is running at a time and we also wanted to be able to show the status of the currently running process. First, when we only wanted to have the 1 process at a time limitation we used a file locking mechanism, but adding the status seemed to be difficult. Switching to SQLite make the solution rather easy and also gives us many more opportunities.

In this example you'll see the implementation.

Process status in SQLite

MongoDB with Perl: insert, find and delete

In this example we'll see how to insert a document in MongoDB. How to find a document based on an internal key-value pair, and how to delete a document based on similar conditions.

MongoDB with Perl: insert, find and delete

Pro: Can't use string (...) as an HASH ref while "strict refs" in use at ...

A less frequently seen error, but nevertheless an annoying one. It usually stems from incorrect use of an Object Oriented module.

Can't use string (...) as an HASH ref while "strict refs" in use at ...