Book Description

Many programmers code by instinct, relying on convenient habits or a “style” they picked up early on. They aren’t conscious of all the choices they make, like how they format their source, the names they use for variables, or the kinds of loops they use. They’re focused entirely on problems they’re solving, solutions they’re creating, and algorithms they’re implementing. So they write code in the way that seems natural, that happens intuitively, and that feels good.

But if you’re serious about your profession, intuition isn’t enough. Perl Best Practices author Damian Conway explains that rules, conventions, standards, and practices not only help programmers communicate and coordinate with one another, they also provide a reliable framework for thinking about problems, and a common language for expressing solutions. This is especially critical in Perl, because the language is designed to offer many ways to accomplish the same task, and consequently it supports many incompatible dialects.

With a good dose of Aussie humor, Dr. Conway (familiar to many in the Perl community) offers 256 guidelines on the art of coding to help you write better Perl code–in fact, the best Perl code you possibly can. The guidelines cover code layout, naming conventions, choice of data and control structures, program decomposition, interface design and implementation, modularity, object orientation, error handling, testing, and debugging.

They’re designed to work together to produce code that is clear, robust, efficient, maintainable, and concise, but Dr. Conway doesn’t pretend that this is the one true universal and unequivocal set of best practices. Instead, Perl Best Practices offers coherent and widely applicable suggestions based on real-world experience of how code is actually written, rather than on someone’s ivory-tower theories on how software ought to be created. Download Now »

Book Description

If you do systems administration work of any kind, you have to deal with the growing complexity of your environment and increasing demands on your time. Automating System Administration with Perl, Second Edition, not only offers you the right tools for your job, but also suggests the best way to approach specific problems and to securely automate recurring tasks. Updated and expanded to cover the latest operating systems, technologies, and Perl modules, this edition of the “Otter Book” will help you:Manage user accounts Monitor filesystems and processes Work with configuration files in important formats such as XML and YAML Administer databases, including MySQL, MS-SQL, and Oracle with DBI Work with directory services like LDAP and Active Directory Script email protocols and spam control Effectively create, handle, and analyze log files Administer network name and configuration services, including NIS, DNS and DHCP Maintain, monitor, and map network services, using technologies and tools such as SNMP, nmap, libpcap, GraphViz and RRDtool Improve filesystem, process, and network security

This edition includes additional appendixes to get you up to speed on technologies such as XML/XPath, LDAP, SNMP, and SQL. With this book in hand and Perl in your toolbox, you can do more with less — fewer resources, less effort, and far less hassle. Download Now »

Book Description

Learn to build web applications with Catalyst, the popular open source web framework based on the Perl programming language. The Definitive Guide to Catalyst: Writing Extendable, Scalable, and Maintainable Perl–Based Web Applications is a definitive guide to Catalyst version 5.8, which will be released in 2009. This book contains

• Training materials for new and experience programmers.
• Worked examples and cookbook–style recipes of common web application programming tasks
• Fundamentals of web application design and best–practice application style

What you’ll learn

• Write web applications with Catalyst and Perl.
• Design for extendability and code reuse.
• Understand deployment options for high– and low–traffic sites.
• Use DBIx::Class, Moose, and Template Toolkit.
• Understand the Catalyst dispatcher and request cycle.
• Deal with common web programming requirements: authentication and authorization, web services, sending e–mail, serving streaming media. Download Now »

Book Description

Perl by Example, Fourth Edition, is the easiest, most hands-on way to learn Perl. Legendary Silicon Valley programming instructor Ellie Quigley has thoroughly updated her classic to deliver the skills and information today’s Perl users need most–including all-new coverage of MySQL database programming and a Perl QuickStart designed to get experienced users up and running fast.

Quigley illuminates every technique with focused, classroom-tested code examples, detailed line-by-line explanations, and real program output. This exceptionally clear, easy-to-understand book takes you from your first Perl script to database-driven applications. It’s the only Perl book you’ll ever need!

New in this edition:
* Perl programming QuickStart: makes first-time Perl programmers productive in just twenty pages
* All-new chapter on using the Perl DBI with the MySQL database–plus an easy SQL primer to quickly get you started programming any database
* New introductions to Perl in biology (bioinformatics) and to mod_perl, a Perl interpreter embedded in the Apache server, which allows you to create fast, dynamic content; manage the Apache server; authenticate users; and much more
Download Now »

Book Description

Perl is a versatile, powerful programming language used in a variety of disciplines, ranging from system administration to web programming to database manipulation. One slogan of Perl is that it makes easy things easy and hard things possible. “Intermediate Perl” is about making the leap from the easy things to the hard ones.Originally released in 2003 as “Learning Perl Objects, References, and Modules” and revised and updated for Perl 5.8, this book offers a gentle but thorough introduction to intermediate programming in Perl. Written by the authors of the best-selling “Learning Perl,” it picks up where that book left off. Topics include:

• Packages and namespaces
• References and scoping
• Manipulating complex data structures
• Object-oriented programming
• Writing and using modules
• Testing Perl code
• Contributing to CPAN

Following the successful format of “Learning Perl,” we designed each chapter in the book to be small enough to be read in just an hour or two, ending with a series of exercises to help you practice what you’ve learned. To use the book, you just need to be familiar with the material in “Learning Perl” and have ambition to go further. Download Now »

Book Description

This book is devoted to the fundamentals of text mining using Perl, an open-source programming tool that is freely available via the Internet (www.perl.org). It covers mining ideas from several perspectives–statistics, data mining, linguistics, and information retrieval–and provides readers with the means to successfully complete text mining tasks on their own.

The book begins with an introduction to regular expressions, a text pattern methodology, and quantitative text summaries, all of which are fundamental tools of analyzing text. Then, it builds upon this foundation to explore:

• Probability and texts, including the bag-of-words model
• Information retrieval techniques such as the TF-IDF similarity measure
• Concordance lines and corpus linguistics
• Multivariate techniques such as correlation, principal components analysis, and clustering
• Perl modules, German, and permutation tests

Each chapter is devoted to a single key topic, and the author carefully and thoughtfully introduces mathematical concepts as they arise, allowing readers to learn as they go without having to refer to additional books. The inclusion of numerous exercises and worked-out examples further complements the book’s student-friendly format. Download Now »