Based on the Darwinian principle of survival of the fittest, genetic programming uses mutation and replication to produce algorithms for creating ever-improving computer programs. In this column, you'll get to know the genetic algorithm in simple terms. This article provides Perl implementations for some specific tasks, which you can adapt for generic use. To demonstrate the genetic algorithm, the author breeds numbers for fitness to a formula, and letters to form English words.
Version: n/a Platform(s): n/a Updated: Thu Aug 30 2001
A mainstay of the Perl culture, JAPH is a short script that produces the output "Just another Perl hacker." Although written for the beginner or intermediate Perl programmer, this article examines a few simple examples of the JAPH genre that will surprise and engage even the most seasoned devotee.
Version: n/a Platform(s): n/a Updated: Wed Aug 1 2001
The author writes "CGI::Application builds upon the bedrock of CGI, adding a structure for writing truly reusable Web-applications. CGI::Application takes what works about CGI and simply provides a structure to negate some of the more onerous programming techniques that have cast an unfavorable light upon it. CGI::Application code is so universal and non-proprietary that it works exceedingly well on any operating system and Web server that supports Perl and CGI. The CGI::Application structure makes it possible for authors to distribute, for the first time, fully functional and sophisticated Web-applications via CPAN.
In this Part 21 of "The Perl You Need To Know" series, it covers the Benchmark module — the handy Perl stopwatch that allows you to time, optimize, and slim down on code.
Version: n/a Platform(s): n/a Updated: Wed Jan 24 2001
Tired of writing Perl code to parse form data? Take a leaf from the book of the experts and let CGI.pm do all the work for you. This article introduces you to CGI.pm's powerful page construction and form parsing capabilities, with simple examples of how you can use it to simplify your Perl development.
Version: n/a Platform(s): n/a Updated: Mon Nov 13 2000
This is a comprehensive tutorial on object-oriented programming in Perl. Some of main topics include: Creating a Class, Class Data, Aggregation, Metaclassical Tools, and more.
Version: n/a Platform(s): n/a Updated: Mon Oct 30 2000
This Part 5 of the Perl 101 series introduces you to subroutines and teaches you how to structure your code for maximum reusability. Also included: return values, my() and local() constructs, and a marriage proposal.
Version: n/a Platform(s): n/a Updated: Sat Oct 7 2000
This is a list of common mistakes that people make when writing Perl scripts and suggestions on how to fix them. Included are general help tips on how to debug - very important particularly for beginners at programming. This list is based on the author's personal experience and complaints found on newsgroups/message boards.
Version: n/a Platform(s): n/a Updated: Sat Jan 8 2000
Find out what those server response codes like 401, 404, 500 mean. It can help you troubleshoot minor problems - knowing these are a must if you'll be working on programs that run on a server.
Version: n/a Platform(s): n/a Updated: Sat Jan 8 2000
These are a few guidelines to help you solving problems with your CGI Script. Topics include: Short overview of the CGI calling process, Server Errors - The server fails to execute the CGI, Logical Errors (Errors in the program flow), and more.
Version: n/a Platform(s): n/a Updated: Thu Dec 9 1999
One of the methods that the web server uses to pass information to a cgi script is through environmental variables. These are created and assigned appropriate values within the environment that the server spawns for the cgi script. This page highlights some of the most commonly used ones, along with a brief description and notes on possible uses for them.
Version: n/a Platform(s): n/a Updated: Tue Aug 31 1999
