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

Switch-Case statement in Perl 5

People coming from other languages often ask how to use the switch case statements in Perl 5.

In a nutshell, you always use if, elsif, and else.

The longer answer is as follows:


Switch-Case statement in Perl 5

Test for expected warnings

There are many modules with function that would give a warning in certain situations. This can be a deprecation warning, when the function is left in to provide backward compability, but you actually want to remove it in the future.

Or, it can be warning of improper input values if for some reason you do not want to throw an exception.

In either case, the warning must stay there as changes are made to the code-base. That warning is now part of API of the module and as such we should write a test that will make sure the warning isn't removed by accident or by someone who likes to eliminate warnings....


Test for expected warnings

Organizing a test script with subtests

As our test script grows we face several issues.

One is that most humans cannot count more than 10. So when the number of test-units passes that number we will constantly make mistakes of the number of tests and soon will will give it up, using a solution such as no_plan.


Organizing a test script with subtests