Introduction to Perl and BioPerl
This note explains the following topics: Perl program structure, Variable types, Scalars , Pragmas , Operators , Arrays , Hashes , Control structures, Loop modifers, Subroutines , Reading and Writing a file, Filehandles , Regular expressions, Regex anchors and operators, Running perl, POD tools, What is Bioperl, Gotchas , Objects in Perl, Interfaces and Inheritance in Bioperl, Bioperl components, Parse a sequence from file, output, Read in sequence and write out in different format, Sequence Databases.
Author(s): Heikki Lehväslaiho
104 Pages 
Perl Programming by Wikibooks.org
This book assumes that you know absolutely nothing about programming at all and that Perl is your first language. However, basic operations such as making text files are outside of the realm of this tutorial.
Author(s): Wikibooks.org
NA Pages
This PDF covers the following topics related to Perl : Getting Started with Perl, Arrays, Hashes and Loops, File Handling, Regular Expressions, Subroutines, References and Complex Data Structures, Perl Modules, Interacting with external programs.
Author(s): Babraham BioInformatics
76 Pages
This PDF covers the following topics related to Perl : Introduction and philosophy, Basics, Variables and data types, Important concepts, Control structures, I/O, Interacting with UNIX.
Author(s): Brent Yorgey
28 Pages
Introduction to Perl Programming Course Notes
This note explains the following topics: Interpreter vs. Compiler, Perl different from other languages, Variables, Scalar Data, Arrays and Lists, Control Structures, Hashes, Regular Expressions, Functions, Interacting with the Operating System, A few Perl Functions.
Author(s): Phil Spector
NA Pages
The aim of this note is to give you not just an understanding of the workings of the perl interpreter, but also the means to investigate more about it, to analyze and solve bugs in the Perl core, and to take part in the Perl development process.
Author(s): Simon Cozens
NA Pages
This book invites Perl programmers and their customers to take a fresh look at software development. It explains Extreme Perl to both programmers and business people.
Author(s): Robert Nagler
194 Pages
