eXtropia: the open web technology company
Technology | Support | Tutorials | Development | About Us | Users | Contact Us
 ::   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
Creating References  
There are several ways to create a reference depending on what type of object you want to reference.

The most basic method for creating a reference is to use the backslash (\) operator. For example, to create a simple scalar reference, you would use something like the following:

     #!/usr/bin/perl -wT
     use strict;
     my $name      = "Selena Sol";
     my $reference = \$name;

Notice the backslash character before $name.

Creating array, hash and subroutine references follows the exact same process such as:

     my $array_reference = \@array_name;
     my $hash_reference  = \%hash_name;
     my $subroutine_ref  = \&sub_name;
Previous | Next | Table of Contents