Web Basics with LWP
Web Basics with LWP Aug 20, 2002 by Sean M. Burke is the author of Perl & LWP Introduction LWP (short for “Library for WWW in Perl”) is a popular group of Perl modules for accessing data on the Web. Like most Perl module-distributions, each of LWP’s component modules comes with documentation that is a complete reference to its interface. However, there are so many modules in LWP that it’s hard to
PDF Processing with Perl
PDF Processing with Perl Sep 21, 2007 by Detlef Groth Adobe’s PDF has become a standard for text documents. Most office products can export their content into PDF. However, this software reaches its limits if you want advanced tasks such as combining different PDF documents into one single document or adding and adjusting the bookmarks panel for better navigation. Imagine that you want to collect
Advanced Subroutine Techniques
Advanced Subroutine Techniques Feb 23, 2006 by Rob Kinyon In “Making Sense of Subroutines,” I wrote about what subroutines are and why you want to use them. This article expands on that topic, discussing some of the more common techniques for subroutines to make them even more useful. Several of these techniques are advanced, but you can use each one by itself without understanding the others. Fur
Using Ajax from Perl
Using Ajax from Perl Mar 2, 2006 by Dominic Mitchell If you’re even remotely connected to web development, you can’t have failed to have heard of Ajax at some point in the last year. It probably sounded like the latest buzzword and was one of those things you stuck on the “must read up on later” pile. While it’s definitely a buzzword, it’s also quite a useful one. Ajax stands for “Asynchronous Jav
Rapid Website Development with CGI::Application
Rapid Website Development with CGI::Application Oct 19, 2006 by Mark Stosberg This article provides an update on the popular and mature CGI::Application framework for web applications. It assumes a basic understanding of the system, so reviewing the previous Perl.com article about CGI::Application may be helpful background reading. CGI::Application and Catalyst Compared You may recall the Perl.com
Still More Perl Lightning Articles
Still More Perl Lightning Articles Jul 13, 2006 by chromatic, Phil Crow, Josh McAdams and Steven Schubiger It has been common practice within the Perl community for ages to ship distributions with a Makefile.PL so that the user will be able to install the packages when he retrieves them, either via the shell which the CPAN/CPANPLUS modules offer or via manual CPAN download. The Makefile.PL consist
FEAR-less Site Scraping
FEAR-less Site Scraping Jun 1, 2006 by Yung-chung Lin Imagine that you have an assignment that you need to fetch all of the web pages of a given website, scrape data from them, and transfer the data to another place, such as a database or plain files. This is a common scenario for data scraping tasks, and CPAN has plenty of modules for this job. While I was developing site-scraping scripts, retrie
Advanced Subroutine Techniques
Advanced Subroutine Techniques Feb 23, 2006 by Rob Kinyon In “Making Sense of Subroutines,” I wrote about what subroutines are and why you want to use them. This article expands on that topic, discussing some of the more common techniques for subroutines to make them even more useful. Several of these techniques are advanced, but you can use each one by itself without understanding the others. Fur
Perl Design Patterns
Perl Design Patterns Jun 13, 2003 by Phil Crow Introduction In 1995, Design Patterns was published, and during the intervening years, it has had a great influence on how many developers write software. In this series of articles, I present my take on how the Design Patterns book (the so-called Gang of Four book, which I will call GoF) and its philosophy applies to Perl. While Perl is an OO languag
More Advancements in Perl Programming
More Advancements in Perl Programming Jan 26, 2006 by Simon Cozens Around Easter last year, I finished writing the second edition of Advanced Perl Programming, a task that had been four years in the making. The aim of this new edition was to reflect the way that Perl programming had changed since the first edition. Much of what Sriram wrote in the original edition was still true, but to be honest,
Analyzing HTML with Perl
Analyzing HTML with Perl Jan 19, 2006 by Kendrew Lau Routine work is all around us every day, no matter if you like it or not. For a teacher on computing subjects, grading assignments can be such work. Certain computing assignments aim at practicing operating skills rather than creativity, especially in elementary courses. Grading this kind of assignment is time-consuming and repetitive, if not te
Lexing Your Data
Lexing Your Data Jan 5, 2006 by Curtis Poe s/(?<!SHOOTING YOURSELF IN THE )FOOT/HEAD/g Most of us have tried at one time or another to use regular expressions to do things we shouldn’t: parsing HTML, obfuscating code, washing dishes, etc. This is what the technical term “showing off” means. I’ve done it too: $html =~ s{ (<a\s(?:[^>](?!href))*href\s*) (&(&[^;]+;)?(?:.(?!\3))+(?:\3)?) ([^>]+>) } {$1
Automated GUI Testing
Automated GUI Testing Aug 11, 2005 by George Nistorica You use Perl at work. Sometimes you are unhappy because there is one application you always have to click on and fill all those input boxes. It’s very boring. Why not let Perl do that while you go grab a coffee? Also, maybe you sometimes feel frustrated that you need to start that nice app and want someone else type in for you. Let Perl do tha
Building Navigation Menus
Building Navigation Menus Jul 7, 2005 by Shlomi Fish Navigation menus are a group of links given at one side of the page that allows users to navigate to different places of a website. Navigation menus allow site visitors to explore other pages of the site and to find what they want more easily. For example, Paul Graham’s home page contains a simple navigation menu made out of images. It doesn’t c
Catalyst
Catalyst Jun 2, 2005 by Jesse Sheidlower Web frameworks are an area of significant interest at the moment. Now that we’ve all learned the basics of web programming, we’re ready to get the common stuff out of the way to concentrate on the task at hand; no one wants to spend time rewriting the same bits of glue to handle parameter processing, request dispatching, and the like. A model currently favo
Ten Essential Development Practices
Ten Essential Development Practices Jul 14, 2005 by Damian Conway The following ten tips come from Perl Best Practices, a new book of Perl coding and development guidelines by Damian Conway. 1. Design the Module’s Interface First The most important aspect of any module is not how it implements the facilities it provides, but the way in which it provides those facilities in the first place. If the
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