Perl

Extending and Embedding Perl explains how to expand the functionality and usefulness of the Perl programming language and how to use Perl from C programs. It begins simply but also covers complex issues using real code examples from the Perl source. The book discusses how to write interfaces to C libraries (as well as C++ and Fortran libraries). It shows you how to implement Perl callbacks for C libraries, how to pass Perl hashes and arrays between Perl and C, and how to use the Perl Data Language infrastructure to improve the speed of array operations.

Additionally, the book peers under the hood to see how the Perl programming language really works by looking at the interpreter. The make-up of Perl variables is discussed along with details on how a Perl program is parsed and converted to executable code.

Perl is a complex language that can be difficult to master. Perl advocates boast that "There's More Than One Way To Do It", but do you really want to learn several ways of saying the same thing to a computer?

To make Perl more accessible, Dr. Tim Maher has over the years designed and taught an essential subset of the language that is smaller, yet practical and powerful. With this engaging book you can now benefit from "Mininal Perl" even if all you know about Unix is grep.

In Minimal Perl, you will learn how to write simple Perl commands (many just one-liners) that go far beyond the limitations of Unix utilities, and those of Linux, MacOS/X, etc. And you'll acquire the more advanced Perl skills used in scripts by capitalizing on your knowledge of related Shell resources. Sprinkled throughout are many Unix-specific Perl tips.

Object Oriented Perl is designed to provide anyone who is familiar with the basics of regular Perl programming with a complete introduction to the object-oriented features of Perl. The book moves from the very simplest applications through advanced applications such as generic programming, multiple dispatch, and object-oriented persistence. Thus, it offers a much-needed resource for persons new to Perl, as well as new and valuable insights and techniques for even the most accomplished Perl programmers.

Part of the fun of programming in Perl lies in tackling tedious tasks with short, efficient, and reusable code. Often, the perfect tool is the one-liner, a small but powerful program that fits in one line of code and does one thing really well.

In Perl One-Liners, author and impatient hacker Peteris Krumins takes you through more than 100 compelling one-liners that do all sorts of handy things, such as manipulate line spacing, tally column values in a table, and get a list of users on a system. This cookbook of useful, customizable, and fun scripts will even help hone your Perl coding skills, as Krumins dissects the code to give you a deeper understanding of the language.

You'll find one-liners that:

• Encode, decode, and convert strings
• Generate random passwords
• Calculate sums, factorials, and the mathematical constants π and e
• Add or remove spaces
• Number lines in a file
• Print lines that match a specific pattern
• Check to see if a number is prime with a regular expression
• Convert IP address to decimal form
• Replace one string with another

And many more! Save time and sharpen your coding skills as you learn to conquer those pesky tasks in a few precisely placed keystrokes with Perl One-Liners.

Take the guesswork out using regular expressions to search and manipulate text. With this updated cookbook, you have access to hundreds of proven recipes for today's most popular programming languages - including C#, Java, JavaScript (including XRegExp), Perl, PHP, Python, Ruby, and VB.NET. As useful as regular expressions can be for programmers, their power doesn't come worry-free. This guide will deepen your understanding, no matter how much experience you have with this reliable tool. You'll learn powerful new tricks, steer clear of flavor-specific gotchas, and save valuable time with this huge library of solutions to difficult, real-world problems.

Understand the basics of regular expressions through a concise tutorial Use regular expressions effectively in several programming and scripting languages Learn how to validate and format input Manage words, lines, special characters, and numerical values Find solutions for using regular expressions in URLs, paths, markup, and data exchange Discover the nuances of more advanced regex features Experience how regular expressions' APIs, syntax, and behavior differ from language to language Write better regular expressions for custom needs