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CP050 - Perl Programming

Course Description: Perl has been described as C, awk, sed, and shell programming all wrapped into one language. Learn how to take advantage of Perl's power through examples and extensive hands-on exercises. This course introduces object-oriented programming in Perl.

Audience: Programmers and system administrators.

Prerequisites: Fundamentals of UNIX. C Programming is recommended.

Course Contents

Overview of Perl

  • What is Perl?
  • Running Perl Programs
  • Example Programs
  • Perl Variables

  • Three Types of Variables
  • Variable Names and Syntax
  • Variable Naming
  • Lists
  • Scalar and List Contexts
  • The Repetition Operator
  • Arrays and Hashes

  • Arrays
  • Example - The @ARGV Array
  • Array Functions
  • Array Slices
  • Hashes
  • Hash Functions
  • Scalar and List Contexts Revisited
  • I/O: Input Operations and File I/O Filehandles

  • The open Function
  • The Input Operator <>
  • Default Input Operator
  • The print Function
  • File Operation Functions
  • Reading Directories
  • Operators

  • Perl operators
  • Operators, Functions and Precedence
  • File Test Operators
  • Assignment Operator Notations
  • The Range Operator
  • Quotation Operators
  • Pattern Matching Operators
  • Flow Control

  • Simple Statements
  • Simple Statement Modifiers
  • Compound Statements
  • The next, last and redo Statements
  • The for Loop
  • The foreach Loop
  • Regular Expressions

  • Pattern Matching Overview
  • The Substitution Operator
  • Regular Expressions
  • Special Characters
  • Quantifiers (*, +, ?, {})
  • Assertions (^, $, \b, \B)
  • Subroutines

  • Overview of Subroutines
  • Passing Arguments
  • Local Variables
  • Passing Names
  • Returning Values
  • Quoting and Interpolation

  • String Literals
  • Interpolation
  • Array Substitution
  • Backslashes and Single Quotes
  • Command Substitution
  • Here Documents
  • References

  • References
  • Creating References
  • Using References
  • Passing References as Arguments to Subroutines
  • Anonymous Composers
  • Hard References as Hash Keys
  • The Symbol Table
  • Complex Data Structures

  • Two-dimensional Arrays in Perl
  • Anonymous Arrays and Anonymous Hashes
  • Arrays of Arrays
  • Arrays of References
  • A Hash of Arrays
  • A Hash of Hashes
  • Packages and Modules

  • Packages
  • BEGIN and END Routines
  • require vs. use
  • Modules
  • The bless Function
  • Object-Oriented Programming in Perl

  • What is Object-Oriented?
  • Why Use Object-Oriented Programming?
  • Classes, Objects, and Methods in Perl
  • Inheritance, the "is-a" Relationship
  • Containment, the "has-a" Relationship
  • Overloaded Operators
  • Destructors
  • Advanced Regular Expressions

  • Substrings
  • Substrings in List Context
  • RE Special Variables
  • RE Options
  • Multiline Res
  • Substituting with an Expression
  • Binary Data Structures

  • Variable-Length (Delimited) Fields
  • Variable vs. Fixed
  • Handling Binary Data
  • The pack() Function
  • The unpack() function
  • The read () Function
  • C Data Structures
  • Multitasking with Perl

  • What are Single and Multitasking?
  • UNIX Multitasking Concepts
  • Process Creation with fork
  • Program Loading with exec()
  • File Descriptor Inheritance
  • How UNIX Opens Files
  • One-Way Data Flow - Pipes
  • Final Result - Page Viewing
  • Sockets Programming in Perl

  • Clients and Servers
  • Ports and Services
  • Berkeley Sockets
  • Data Structures of the Sockets API
  • Socket System Calls
  • Generic Client/Server Models
  • A Little Web Server
  • Appendix 1 - The Perl Distribution

  • Where Can You Get Perl?
  • How Do You Build Perl?
  • What Gets Created and Installed?
  • Differences Between Platforms
  • Appendix 2 - The Perl Debugger

  • Overview of the Perl debugger
  • Debugger Commands
  • Non-Debugger Commands
  • Listing Lines
  • Single Stepping
  • Setting and Clearing Breakpoints
  • Modifying the Debugger
  • The -w and -D Flags

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