Perl Tutorials - Herong's Tutorial Examples - v6.01, by Dr. Herong Yang
Hard References - Addresses of Memory Objects
This chapter provides tutorial examples and notes about hard references, addresses of memory objects. Topics include taking hard references with the reference operator, \ on variables, functions or anonymous objects; using hard references in the same way as soft references by using curly brackets {} or the dereference operator ->; using hard references as strings or numbers.
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\* - Creating Hard References
Using Hard References
$$name - Replacing Identifiers by Scalar Variables
${EXPR} - Replacing Identifiers by Expressions
EXPR->* - The Dereference Operator
$$$name - Nested Hard References
\$b-\$a - Using Hard References in Other Operations
Takeaways:
Table of Contents
Data Types: Values and Variables
Expressions, Operations and Simple Statements
Name Spaces and Perl Module Files
►Hard References - Addresses of Memory Objects
Objects (or References) and Classes (or Packages)
Typeglob and Importing Identifiers from Other Packages
String Built-in Functions and Performance
File Handles and Data Input/Output
Open Directories and Read File Names
File System Functions and Operations
Socket Communication Over the Internet
XML::Simple Module - XML Parser and Generator
SOAP::Lite - SOAP Server-Client Communication Module
Perl Programs as IIS Server CGI Scripts
CGI (Common Gateway Interface)
XML-RPC - Remote Procedure Call with XML and HTTP
RPC::XML - Perl Implementation of XML-RPC
Integrating Perl with Apache Web Server
CGI.pm Module for Building Web Pages
LWP::UserAgent and Web Site Testing
Converting Perl Script to Executable Binary