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

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


Split up and flatten CSV file


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.


Out of memory!


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.


Forking, Process ID, Parent Process ID, init