Perl Tutorials - Herong's Tutorial Examples - v6.01, by Dr. Herong Yang
Symbolic (or Soft) References
This chapter provides tutorial examples and notes about symbolic (or soft) references. Topics include replacing variable or function identifiers with string expressions in curly brackets {}; using scalar variables without {}; using the dereference operator -> with array, hash, or function subscription: EXPR->[*], EXPR->{*}, or EXPR->(*).
These sections are omitted from this Web preview version. To view the full content, see information on how to obtain the full version this book.
Using Symbolic References
$$name - Replacing Identifiers by Scalar Variables
${EXPR} - Replacing Identifiers by Expressions
EXPR->* - The Dereference Operator
$$$name - Nested Symbolic References
Takeaways:
Table of Contents
Data Types: Values and Variables
Expressions, Operations and Simple Statements
Name Spaces and Perl Module Files
►Symbolic (or Soft) References
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