Higher order PerlHigher order Perl

Most Perl programmers, including the inventor of Perl, were originally trained as C and UNIX programmers.

Author: Mark Jason Dominus


ISBN: 1558607013


Page: 582

View: 212

Most Perl programmers, including the inventor of Perl, were originally trained as C and UNIX programmers. So the Perl programs that they write bear a strong resemblance to C programs. But Perl incorporates many features that have their roots in non-C programming languages such as LISP. These advanced features are not well understood and are rarely used by most Perl programmers, but they are very powerful. They can automate tasks in everyday programming that are difficult to solve any other way, and also serve as an introduction to the techniques of functional programming for those who have not.

Higher Order PerlHigher Order Perl

For several years Mark Jason Dominus has worked to apply functional programming techniques to Perl.

Author: Mark Jason Dominus

Publisher: Elsevier

ISBN: 0080478344


Page: 600

View: 262

Most Perl programmers were originally trained as C and Unix programmers, so the Perl programs that they write bear a strong resemblance to C programs. However, Perl incorporates many features that have their roots in other languages such as Lisp. These advanced features are not well understood and are rarely used by most Perl programmers, but they are very powerful. They can automate tasks in everyday programming that are difficult to solve in any other way. One of the most powerful of these techniques is writing functions that manufacture or modify other functions. For example, instead of writing ten similar functions, a programmer can write a general pattern or framework that can then create the functions as needed according to the pattern. For several years Mark Jason Dominus has worked to apply functional programming techniques to Perl. Now Mark brings these flexible programming methods that he has successfully taught in numerous tutorials and training sessions to a wider audience. * Introduces powerful programming methods new to most Perl programmers that were previously the domain of computer scientists * Gradually builds up confidence by describing techniques of progressive sophistication * Shows how to improve everyday programs and includes numerous engaging code examples to illustrate the methods

Mastering PerlMastering Perl

Although you could adequately learn Perl from our series of Learning Perl, ... His title refers to the idea of higher-order functions, a technique in ...

Author: brian d foy

Publisher: "O'Reilly Media, Inc."

ISBN: 0596551479


Page: 346

View: 221

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. It convey's Perl's special 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 Profile and benchmark Perl to find out where to focus your improvements Wrangle Perl code to make it more presentable and readable See how Perl keeps track of package variables and how you can use that for some powerful tricks Define subroutines on the fly and turn the tables on normal procedural programming. Modify and jury rig modules to fix code without editing the original source Let your users configure your programs without touching the code Learn how you can detect errors Perl doesn't report, and how to tell 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 them over a network Write programs as modules to get the benefit of Perl's distribution and testing tools 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.

Effective Perl ProgrammingEffective Perl Programming

Higherorder functions, 177 Higher Order Perl (Dominus), 177 Hook::LexWrap module, 328 Horizontal whitespace, 111–112 HTML::Parser module, ...

Author: Joseph N. Hall

Publisher: Pearson Education

ISBN: 9780321718273


Page: 504

View: 652

The Classic Guide to Solving Real-World Problems with Perl—Now Fully Updated for Today’s Best Idioms! For years, experienced programmers have relied on Effective Perl Programming to discover better ways to solve problems with perl. Now, in this long-awaited second edition, three renowned Perl programmers bring together today’s best idioms, techniques, and examples: everything you need to write more powerful, fluent, expressive, and succinct code with Perl. Nearly twice the size of the first edition, Effective Perl Programming, Second Edition, offers everything from rules of thumb to avoid common pitfalls to the latest wisdom for using Perl modules. You won’t just learn the right ways to use Perl: You’ll learn why these approaches work so well. New coverage in this edition includes Reorganized and expanded material spanning twelve years of Perl evolution Eight new chapters on CPAN, databases, distributions, files and filehandles, production Perl, testing, Unicode, and warnings Updates for Perl 5.12, the latest version of Perl Systematically updated examples reflecting today’s best idioms You’ll learn how to work with strings, numbers, lists, arrays, strictures, namespaces, regular expressions, subroutines, references, distributions, inline code, warnings, Perl::Tidy, data munging, Perl one-liners, and a whole lot more. Every technique is organized in the same Items format that helped make the first edition so convenient and popular.

Building Tag Clouds in Perl and PHPBuilding Tag Clouds in Perl and PHP

They do not use random word order (although many other tag clouds do). ... I think higher-level scripting languages like Perl, PHP, Python, and Ruby are all ...

Author: Jim Bumgardner

Publisher: "O'Reilly Media, Inc."

ISBN: 9780596527945


Page: 48

View: 413

Tag clouds are everywhere on the web these days. First popularized by the web sites Flickr, Technorati, and del.icio.us, these amorphous clumps of words now appear on a slew of web sites as visual evidence of their membership in the elite corps of "Web 2.0." This PDF analyzes what is and isn't a tag cloud, offers design tips for using them effectively, and then goes on to show how to collect tags and display them in the tag cloud format. Scripts are provided in Perl and PHP. Yes, some have said tag clouds are a fad. But as you will see, tag clouds, when used properly, have real merits. More importantly, the skills you learn in making your own tag clouds enable you to make other interesting kinds of interfaces that will outlast the mercurial fads of this year or the next.

Advanced RailsAdvanced Rails

Mark Jason Dominus's book Higher-Order Perl (Morgan Kaufmann Publishers) was revolutionary in introducing functional programming concepts into Perl.

Author: Brad Ediger

Publisher: "O'Reilly Media, Inc."

ISBN: 9780596519728


Page: 357

View: 868

A guide to building applications with Rails covers such topics as metaprogamming, Active Support library, advanced database functions, security principles, RESTful architecture, and optimizing performance.

Perl Best PracticesPerl Best Practices

Perl. Coding. and. Development. Practices. Testing and Debugging Perl Debugged. ... Higher-Order Perl: Transforming Programs with Programs.

Author: Damian Conway

Publisher: "O'Reilly Media, Inc."

ISBN: 9780596001735


Page: 517

View: 192

Presents guidelines on the art of coding with Perl, covering such topics as naming conventions, data and control structures, program decomposition, interface design, and error handling.

Perl HacksPerl Hacks

Pull Multiple Values from an Iterator Mark Jason Dominus's Higher Order Perl (Morgan Kaufmann, 2005) shows how to use functional programming techniques in ...

Author: Chromatic

Publisher: "O'Reilly Media, Inc."

ISBN: 0596553676


Page: 298

View: 126

With more than a million dedicated programmers, Perl has proven to be the best computing language for the latest trends in computing and business. While other languages have stagnated, Perl remains fresh, thanks to its community-based development model, which encourages the sharing of information among users. This tradition of knowledge-sharing allows developers to find answers to almost any Perl question they can dream up. And you can find many of those answers right here in Perl Hacks. Like all books in O'Reilly's Hacks Series, Perl Hacks appeals to a variety of programmers, whether you're an experienced developer or a dabbler who simply enjoys exploring technology. Each hack is a short lesson--some are practical exercises that teach you essential skills, while others merely illustrate some of the fun things that Perl can do. Most hacks have two parts: a direct answer to the immediate problem you need to solve right now and a deeper, subtler technique that you can adapt to other situations. Learn how to add CPAN shortcuts to the Firefox web browser, read files backwards, write graphical games in Perl, and much more. For your convenience, Perl Hacks is divided by topic--not according toany sense of relative difficulty--so you can skip around and stop at any hack you like. Chapters include: Productivity Hacks User Interaction Data Munging Working with Modules Object Hacks Debugging Whether you're a newcomer or an expert, you'll find great value in Perl Hacks, the only Perl guide that offers somethinguseful and fun for everyone.

Mastering Algorithms with PerlMastering Algorithms with Perl

If you have a higher-degree polynomial, or a nonlinear equation, use the Newton ... For higher-order polynomials, you'll have to iterate to find a solution; ...

Author: Jarkko Hietaniemi

Publisher: "O'Reilly Media, Inc."

ISBN: 1449307191


Page: 706

View: 956

Many programmers would love to use Perl for projects that involve heavy lifting, but miss the many traditional algorithms that textbooks teach for other languages. Computer scientists have identified many techniques that a wide range of programs need, such as: Fuzzy pattern matching for text (identify misspellings!) Finding correlations in data Game-playing algorithms Predicting phenomena such as Web traffic Polynomial and spline fitting Using algorithms explained in this book, you too can carry out traditional programming tasks in a high-powered, efficient, easy-to-maintain manner with Perl.This book assumes a basic understanding of Perl syntax and functions, but not necessarily any background in computer science. The authors explain in a readable fashion the reasons for using various classic programming techniques, the kind of applications that use them, and -- most important -- how to code these algorithms in Perl.If you are an amateur programmer, this book will fill you in on the essential algorithms you need to solve problems like an expert. If you have already learned algorithms in other languages, you will be surprised at how much different (and often easier) it is to implement them in Perl. And yes, the book even has the obligatory fractal display program.There have been dozens of books on programming algorithms, some of them excellent, but never before has there been one that uses Perl.The authors include the editor of The Perl Journal and master librarian of CPAN; all are contributors to CPAN and have archived much of the code in this book there."This book was so exciting I lost sleep reading it." Tom Christiansen

On PerlOn Perl

Perl for Students and Professionals Jugal Kalita ... It makes them more important than higher-order equations from a practical viewpoint.

Author: Jugal Kalita

Publisher: Universal-Publishers

ISBN: 158112550X


Page: 660

View: 420

The book has an introductory chapter that gets the reader started quickly with programming in Perl. The initial part of the book discusses Perl expressions, statements, control flow, built-in data types such as arrays and hashes, and complex data structures built using references. On Perl has several chapters covering specialized topics. The chapter on socket-based network programming deals with forking and using fork to write complex interactive client-server programs. There is a chapter with in-depth discussion of CGI programming including error-handling and security issues that arise. The chapter on web-client programming deals with writing programs that access Web pages, fill up GET and POST forms, handle cookies and redirected Web pages. The book has several unique chapters not found in any other book on Perl in the market. The chapter on security discusses hashes such as MD5, message authentication codes (MACs), digital signature schemes, and encryption techniques such as DES, Rijndael, and RSA. Other chapters deal with writing recursive programs that work with files and directories; this chapter also discusses predefined modules that deal with portability in file names and paths across operating systems, recursive traversal of file hierarchies and tarring and untarring of filles. The chapter on functional programming illustrates that Perl functions are first-class, can be used to write closures and can be composed to form more complex functions. In particular, this can be useful for programming in artificial intelligence.

Perl CookbookPerl Cookbook

Solutions & Examples for Perl Programmers Tom Christiansen, Nathan Torkington ... Usually some kind of higher-level Perl operation, like pattern matching, ...

Author: Tom Christiansen

Publisher: "O'Reilly Media, Inc."

ISBN: 0596554966


Page: 968

View: 743

Find a Perl programmer, and you'll find a copy of Perl Cookbook nearby. 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 Web programming Since its first release in 1998, Perl Cookbook has earned its place in the libraries of serious Perl users of all levels of expertise by providing practical answers, code examples, and mini-tutorials addressing the challenges that programmers face. Now the second edition of this bestselling book is ready to earn its place among the ranks of favorite Perl books as well.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 for Oracle DBAsPerl for Oracle DBAs

The 3GL language most often used to interact with OCI is C, although it is also possible to use higher-level languages like Perl to communicate with the ...

Author: Andy Duncan

Publisher: "O'Reilly Media, Inc."

ISBN: 9780596002107


Page: 602

View: 923

Offers practical guidelines on how to use the popular open source language Perl to manage, monitor, and tune Oracle databases, describing such Oracle/Perl software modules as Oracle Call Interface and Perl DataBase Interface, and features more than one hundred ready-to-use programs for database administrators to use in a Linux or Windows system. Original. (Intermediate)

Advanced Perl ProgrammingAdvanced Perl Programming

... This is an example of a higher - order procedure that takes ( a reference to ) another user - defined subroutine as an input parameter and calls it one ...

Author: Sriram Srinivasan

Publisher: "O'Reilly Media, Inc."

ISBN: 1565922204


Page: 404

View: 714

Covers advanced features of Perl, how the Perl interpreter works, and presents areas of modern computing technology such as networking, user interfaces, persistence, and code generation.

Pro PerlPro Perl

order to read or write to any kind of data source, we need a way of ... with C will recognize that Perl's filehandles are very similar to the higher-level ...

Author: Peter Wainwright

Publisher: Apress

ISBN: 1430200146


Page: 1064

View: 927

*Condensed, readable style; delivers tremendous value in just one book. This book offers *THE resource for focused and pragmatic industrial solutions in Perl, while the competing *best-sellers are older, quirkier and shallower treatments of Perl. *Thorough discussion of Perl—from installations to applications development; ideal for working Perl programmers in 2005. *Wainwright is a respected Perl expert and author of industry-respected Pro Apache title.

Professional VMware ServerProfessional VMware Server

For higher level Perl scripting this provides little use on a Windows machine because all Windows machines simply return MSWin32; however, this is perfect ...

Author: Eric Hammersley

Publisher: John Wiley & Sons

ISBN: 9780470079881


Page: 437

View: 694

A guide to VMware Server covers such topics as installation, creating development base images, organizing image libraries, using VmCOM, and integrating VMServer into an existing environment.

Derivatives AlgorithmsDerivatives Algorithms

The challenge and promise of higher-level programming are often explored by advocates of ... Mark-Jason Dominus's Higher-Order Perl and the Perl 6 language ...

Author: Tom Hyer

Publisher: World Scientific

ISBN: 9789814289801


Page: 306

View: 735

Derivatives Algorithms provides a unique expert overview of the abstractions and coding methods which support real-world derivatives trading. Written by an industry professional with extensive experience in large-scale trading operations, it describes the fundamentals of library code structure, and innovative advanced solutions to thorny issues in implementation. For the reader already familiar with C++ and arbitrage-free pricing, the book offers an invaluable glimpse of how they combine on an industrial scale. Topics range from interface design through code generation to the protocols that support ever more complex trades and models.

Higher Order Components for Grid ProgrammingHigher Order Components for Grid Programming

... byte code) like Java and C# (both requiring a VM), while programs where sources are often changed can be written using scripting languages like Perl and ...

Author: Jan Dünnweber

Publisher: Springer Science & Business Media

ISBN: 9783642008412


Page: 186

View: 574

A major challenge in grid computing remains the application software development for this new kind of infrastructure. Grid application programmers have to take into account several complicated aspects: distribution of data and computations, parallel computations on different sites and processors, heterogeneity of the involved computers, load balancing, etc. Grid programmers thus demand novel programming methodologies that abstract over such technical details while preserving the beneficial features of modern grid middleware. For this purpose, the authors introduce Higher-Order Components (HOCs). HOCs implement generic parallel/distributed processing patterns, together with the required middleware support, and they are offered to users via a high-level service interface. Users only have to provide the application-specific pieces of their programs as parameters, while low-level implementation details, such as the transfer of data across the grid, are handled by the HOCs. HOCs were developed within the CoreGRID European Network of Excellence and have become an optional extension of the popular Globus middleware. The book provides the reader with hands-on experience, describing a broad collection of example applications from various fields of science and engineering, including biology, physics, etc. The Java code for these examples is provided online, complementing the book. The expected application performance is studied and reported for extensive performance experiments on different testbeds, including grids with worldwide distribution. The book is targeted at graduate students, advanced professionals, and researchers in both academia and industry. Readers can raise their level of knowledge about methodologies for programming contemporary parallel and distributed systems, and, furthermore, they can gain practical experience in using distributed software. Practical examples show how the complementary online material can easily be adopted in various new projects.

UNIX and Perl to the Rescue UNIX and Perl to the Rescue

One way to explore a variable and all its substructures is with Perl's built-in ... array which itself contains several tiers of higher-order structure.

Author: Keith Bradnam

Publisher: Cambridge University Press

ISBN: 9781107000681


Page: 428

View: 554

An accessible guide to learning the key features of Unix and Perl, written with the non-programmer in mind.

Programming Language PragmaticsProgramming Language Pragmatics

Perl's text processing features allow us to parse the output of ps, ... Most provide extensive support for higher level types, including arrays, strings, ...

Author: Michael Lee Scott

Publisher: Morgan Kaufmann

ISBN: 9780126339512


Page: 875

View: 819

Accompanying CD-ROM contains ... "advanced/optional content, hundreds of working examples, an active search facility, and live links to manuals, tutorials, compilers, and interpreters on the World Wide Web."--Page 4 of cover.