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Resources     Tutorials     Presentations Perl & CGI tutorials     Intro to Perl/CGI and HTML Forms     Intro to Windows Perl     Intro to Perl 5     Intro to Perl     Intro to Perl Taint mode     Sherlock Holmes and the Case of the Broken CGI Script     Writing COM Components in Perl Java tutorials     Intro to Java     Cross Browser Java Misc technical tutorials     Intro to The Web Application Development Environment     Introduction to XML     Intro to Web Design     Intro to Web Security     Databases for Web Developers     UNIX for Web Developers     Intro to Adobe Photoshop     Web Programming 101     Introduction to Microsoft DNA Misc non-technical tutorials     Misc Technopreneurship Docs     What is a Webmaster?     What is the open source business model?     Technical writing     Small and mid-sized businesses on the Web Offsite tutorials     ISAPI Perl Primer     Serving up web server basics     Introduction to Java (Parts 1 and 2) in Slovak   introduction to Perl 5 for web developers Table of Contents   Title Page What is Perl 5 References Creating References Dereferencing a Reference Anonymous References Variable Localization Introduction to Object Oriented Design Principles Procedural-based Programming Limitations of Procedural-Oriented Programming Object-Oriented Programming Objects Encapsulation Inheritance Polymorphism Object Oriented Design in Perl Defining a Class Instantiating an Object Using Methods Inheriting from a Class Modules Using Modules Miscellaneous Constructs Using "qw" Using "=>"