Bøger om Perl

Programming Perl

When it comes to learning Perl, programmers consider this book to be the undisputed bible. You not only learn every nuance of this language, you also get a unique perspective on the evolution of Perl and its future direction. The 4th edition has been thoroughly updated for version 5.14, with details on regular expressions, support for UNICODE, threads, and many other features. Many Perl books explain typeglobs, pseudohashes, and closures, but only this one shows the motivations behind these features and why they work the way they do. It's exactly what you'd expect from its prominent authors: Larry Wall is the inventor of Perl, and Tom Christiansen was one of the first champions of the language. In print since 1991, the book affectionately known as "the Camel" has played a central role in computing among programmers and system administrators around the world. With Programming Perl, you too will learn the most efficient ways to use this language.

Mastering Perl

This is the third in O'Reilly's series of landmark Perl tutorials, which started with "Learning Perl", the bestselling introduction that taught you the basics of Perl syntax, and "Intermediate Perl", which taught you how to create re-usable Perl software. "Mastering Perl" pulls everything together to show you how to bend Perl to your will. Assuming you're familiar with concepts from the first two books - such as basic syntax, nested data structures, and the use of modules - "Mastering Perl" provides the next logical stage of Perl expertise by conveying its models and programming idioms. This book isn't a collection of clever tricks, but a way of thinking about Perl programming so you can integrate the real-life problems of debugging, maintenance, configuration, and other tasks you encounter as a working programmer. The book explains how to: use advanced regular expressions, including global matches, lookarounds, readable regexes, and regex debugging; avoid common programing problems with secure programming techniques; debug Perl with the Perl debugger, write your own debugger, and use debuggers others wrote; profile Perl to find out where you should concentrate your efforts before setting out to improve your program; benchmark Perl to figure out which implementations do better on time, memory, and other metrics - and cautions about what your numbers actually mean; wrangle Perl code to make it more presentable and readable by using M or M; symbol tables and typeglobs - How Perl keeps track of package variables and how you can use that mechanism for some powerful Perl tricks; define subroutines on the fly and turn the tables on normal procedural programming; and iterate through subroutine lists rather than data to make your code more effective and easy to maintain. It also includes topics such as: modify and jury rig modules to fix code without editing the original source; let your users configure your programs without touching the code; detect and reporting errors by learning how Perl reports errors, how you can detect errors Perl doesn't report, and how to tell your users about them; let your Perl program talk back to you by using Log4perl; store data for later use in another program, a later run of the same program, or to send as text over a network; work with Pod to translate plain ol' documentation into any format that you like, and test it, too; use bit operations and bit vectors to efficiently store large data; implement your own versions of Perl's basic data types to perform fancy operations without getting in the user's way; and write programs as modules to get all of the benefit of Perl's module distribution, installation, and testing tools. The appendices include "Brian's Guide to Solving Any Perl Problem" to improve your troubleshooting skills, as well as suggested reading to continue your Perl education. "Mastering Perl" starts you on your path to becoming the person with the answers, and, failing that, the person who knows how to find the answers or discover the problem.

Grundbog i gestaltterapi

Grundbog i gestaltterapi fremlægger på systematisk måde gestaltterapiens teoretiske grundlag, skridt for skridt. Og gennem 18 gradvist opbyggede selv-eksperimenter sætter den læseren i stand til at anvende gestaltterapien på sig selv, uden en terapeuts hjælp.

Udfører man disse selv-eksperimenter systematisk vil resultatet være en Øget evne til at opleve ens egne følelser og omverdenen mere intenst, og en forbedret evne til at handle i miljøet for at få tilfredsstillet ens grundlæggende psykologiske behov.

Bogen henvender sig ikke først og fremmest til det menneske, der har alvorlige psykiske problemer, men til alle mennesker, der gerne vil være mere levende.

Selvterapi-eksperimenterne har direkte paralleller til frigørelsesteknikker såsom bioenergetisk terapi, primalterapi og meditation, og kan bruges i sammenhæng med disse.

Perl for Dummies

In the days before personal computers, BASIC was the easy programming language to learn, and serious programmers learned FORTRAN or COBOL to do "real work." Today, many people have discovered that Perl is both a great beginning programming language and one that enables them to write powerful programs with little effort. If you're interested in discovering how to program (or how others program), Perl For Dummies, 4th Edition, is for you. If you already know something about programming (but not about Perl), this book is also for you. If you're already an expert programmer, you're still welcome to read this book; you can just skip the basic stuff (you never know what kind of new tips and tricks you'll pick up). This reference guide shows you how to use Perl under many different operating systems, such as UNIX, many flavors of Windows (Windows 95/98, Windows NT, Windows 2000, Windows Me, and Windows XP), and Macintosh OS 9 and OS X; in fact, Perl runs on many more operating systems than these. Here's a sampling of what Perl For Dummies, 4th Edition, has to offer: Installing Perl on various platforms Nailing down the basics of building Perl programs Working with text and numbers Constructing lists and working with them Creating conditionals and loops Delving into more advanced features such as operators and functions Reading and writing files and directories Using subroutines for modularity Demystifying Web server programs Creating your own Internet clients The Perl programming language enables you to write fully working computer programs with just a few steps. It's particularly good at common programming tasks, such as reading and writing text files, but it also excels at reducing the work that programmers have to do. Perl For Dummies, 4th Edition, shows you how to do all of that and how to modify programs to your heart's content. After all, one of the common phrases in the world of Perl programmers is, "There's more than one way to do it."

Intermediate Perl

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. Perl is a different language to different people. It is a quick scripting tool for some, and a fully-featured object-oriented language for others. It is used for everything from performing quick global replacements on text files, to crunching huge, complex sets of scientific data that take weeks to process. Perl is what you make of it. But regardless of what you use Perl for, this book helps you do it more effectively, efficiently, and elegantly. Intermediate Perl is about learning to use Perl as a programming language, and not just a scripting language. This is the book that turns the Perl dabbler into the Perl programmer.

Perl Cookbook

"Perl Cookbook" is a comprehensive collection of problems, solutions, and practical examples for anyone programming in Perl. The book contains hundreds of rigorously reviewed Perl "recipes" and thousands of examples ranging from brief one-liners to complete applications. The second edition of Perl Cookbook has been fully updated for Perl 5.8, with extensive changes for Unicode support, I/O layers, mod_perl, and new technologies that have emerged since the previous edition of the book. Recipes have been updated to include the latest modules. New recipes have been added to every chapter of the book, and some chapters have almost doubled in size. Covered topic areas include: manipulating strings, numbers, dates, arrays, and hashes; pattern matching and text substitutions; references, data structures, objects, and classes; signals and exceptions; screen addressing, menus, and graphical applications; managing other processes; writing secure scripts; client-server programming; Internet applications programming with mail, news, ftp, and telnet; CGI and mod_perl programming; and Web programming. Whether you're a novice or veteran Perl programmer, you'll find Perl Cookbook, 2nd Edition to be one of the most useful books on Perl available. Its comfortable discussion style and accurate attention to detail cover just about any topic you'd want to know about. You can get by without having this book in your library, but once you've tried a few of the recipes, you won't want to.

Perl Best Practices

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. Most of all, Perl Best Practices offers guidelines that actually work, and that many developers around the world are already using. Much like Perl itself, these guidelines are about helping you to get your job done, without getting in the way. Praise for Perl Best Practices from Perl community members: "As a manager of a large Perl project, I'd ensure that every member of my team has a copy of Perl Best Practices on their desk, and use it as the basis for an in-house style guide." -- Randal Schwartz "There are no more excuses for writing bad Perl programs. All levels of Perl programmer will be more productive after reading this book." -- Peter Scott "Perl Best Practices will be the next big important book in the evolution of Perl. The ideas and practices Damian lays down will help bring Perl out from under the embarrassing heading of "scripting languages". Many of us have known Perl is a real programming language, worthy of all the tasks normally delegated to Java and C++. With Perl Best Practices, Damian shows specifically how and why, so everyone else can see, too." -- Andy Lester "Damian's done what many thought impossible: show how to build large, maintainable Perl applications, while still letting Perl be the powerful, expressive language that programmers have loved for years." -- Bill Odom "Finally, a means to bring lasting order to the process and product of real Perl development teams." -- Andrew Sundstrom "Perl Best Practices provides a valuable education in how to write robust, maintainable P

Beginning Perl for Bioinformatics

An Introduction to Perl for Biologists

Minimal Perl

Most books make Perl unnecessarily hard to learn by attempting to teach the whole language, including its many redundancies, while ignoring the reader's knowledge of related languages and concepts. This book makes Perl easy to learn by teaching a strategically designed subset that's familiar to UNIX/Linux people, and by capitalizing on their existing knowledge rather than ignoring it. With this book, readers learn a carefully designed subset of the language called "Minimal Perl", which was developed through five years of experience in training software professionals at major corporations. It makes Perl more accessible to those having UNIX/Linux skill levels ranging from elementary to expert, by capitalizing on their existing knowledge of important utilities (grep, awk), or essential concepts (filters, command substitution, looping). Dozens of detailed programming examples are shown, drawn from contemporary application areas such as system administration, networking, web development, databases, finance, HTML, CGI, and text analysis.

Sams Teach Yourself Perl in 24 Hours

Learn Perl programming quickly and easily with 24 one-hour lessons in Sams Teach Yourself Perl in 24 Hours. The book's step-by-step lessons teach you the basics of Perl and how to apply it in web development and system administration. Plus, the third edition has been updated to include five chapters on new technologies, information on the latest version of Perl, and a look ahead to Perl 6. Sams Teach Yourself Perl in 24 Hours focuses on real-world development, teaching you how to: * Effectively use Perl for large development projects using Perl modules * Use Perl for data processing * Utilize Perl as a "glue" language with other programming languages * Use Perl as a web development language