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Pearl

Course curriculum

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Introduction to Perl
• Origin and Design Goals of Perl
• Overview of Perl Features
• Getting and Installing Perl
• Accessing Documentation via perldoc
• HTML-Format Reference Documentation
• Perl Strengths and Limitations

Using Variables
• Scalar Variables
• Introduction to Standard Data Types
• Retrieving Standard Input Using the Default Variable $_
• Reserved Scalar Variables
• Assigning Strings and Numbers to Scalar Variables
• Declaring Constants for Persistent Values
• Using strict to Declare Variables

Operators
• Introduction to Fundamental Operators
• Operator Precedence and Associativity
• Using the Ternary Operator ?: as a Shortcut for the if Statement
• Using and <> File I/O Operators for Standard Input/Output
• Using the Shortcut Operators +=, -=, *=, /=

Flow Control: Conditional Statements and Looping
• Conditional Expressions and Logical Operators
• if/else/elsif and unless
• Constructing switch/case Equivalent Expressions
• while Loops and do Loops
• for and foreach Loops
• Labels
• Altering Program Flow with next, last, and redo
• Trapping Errors with the eval Function
• Terminating a Script with exit

Arrays and Hashes
• Defining Numeric Index Arrays
• Defining Associative Arrays
• Sorting Arrays with the sort Function
• Adding and Deleting Items Using push, pop, shift, andunshift
• Using slice, splice, and reverse
• Other Array Manipulation Techniques
• Looping through an Array
• Merging Arrays
• Associative Array Manipulation Functions
• Introduction to Hashes
• Preallocating Memory to Optimize Hash Performance

File and Directory I/O
• Using open and close
• File Open Modes
• Reading Files into Arrays
• Retrieving File Metadata
• Built-in File Management Functions
• Using print and write
• File Test Operators
• Directory Manipulation Using opendir, closedir, readdir, chdir, mkdir and rmdir

Implementing Command Line Arguments
• Reading Command Line Arguments from @ARGV
• Read Files Explicitly with and Implicitly with <>
• Manipulating Positional Parameters with push, pop, shift
• Process Lists of Files
• Processing Command Line Options with getopt or getopts
• Analyzing Command Line Argument Values with the Getopt::Stdand Getopt::Long Modules
• Reserved Variables
• Manipulating Identifiable Options Using GetOptions

Debugging In Perl
• Using the Built-in Perl Debugger
• Starting the Debugger
• Debugger Command Syntax
• Checking for Script Syntax Errors
• Solving Compile-Time Errors
• Single-Stepping through a Script
• Executing to Breakpoints
• Setting Global Watches
• Printing Values of Variables
• Listing All Variables Used in the Script
• Using Strict Error Checking
• Quitting the Debugger

Accessing a Database Using Perl DBI
• Database Access Life Cycle
• Using DBI and DBD to Connect to a Database
• Fundamental Data Storage and Retrieval Strategies
• DBI Query Syntax
• Using DBI Methods to Retrieve Database Information
o Preparing Queries to be Executed
o Creating Parameterized Queries
o Executing Queries Using execute and do
• Fetching the Result Set to Achieve Workable Data in the Perl Script
o Extracting Data Using an Array
o Extracting Data Using a Hash
• Useful Utilities to Aid in Database Development
• Using Other Modules to Access Databases on the Web
• Extracting Data Using a Hash
• Displaying Results from Queries in a Report
• Releasing Database Resources

Getting Started With Perl
• Explicit Invocation of the Perl Interpreter
o Running Perl on UNIX vs. Windows
o Running Perl from the Command Line
o Using Command Line Options
o Using Debug Mode
• Implicit Invocation of the Perl Interpreter
• Running and Debugging Perl Scripts
• Simple and Compound Statements
• Fundamental Input Techniques
• Using the print Function to Generate Standard Output

Pattern Matching in Perl
• Regular Expressions in Perl
• Using Pattern Matching Operators
• Altering Data with Substitutions in Regular Expressions
• Using Backreferences to Capture Data from Regular Expression Matching
• Global and Case-Insensitive Matches
• Altering Data with Character Translation
• Using Variables in Patterns

String Manipulation
• String Comparison
• String Relations
• Concatenation
• Substring Manipulation
• Using chomp and chop to Eliminate EOL Characters
• Escape Characters for Formatting
• String Manipulation Functions

Subroutines and Parameters
• Simplifying Scripts with Subroutines
• Defining and Calling a Subroutine
• Passing Arguments by Value
• Passing Arguments by Reference
• Using return to Return a Value
• Controlling Variable Scope using my and local Keywords

Packages and Modules
• The Power of Packages and Modules
• Introduction to Standard Modules
• Where to Find Modules on the Internet
• Installing a Module on UNIX or Windows
• Creating Packages for Portability
• Using Packages to Create Isolated Namespaces and to Separate Code
• Creating Modules
• Creating and Using Symbols in a Module
• Using the Exporter to Export Symbols from a Perl Module

Input/Output Processing
• Parsing Input
• Using Standard Input, Standard Output, and Standard Error
• String and Field Processing
• Using Streams and Pipes
• Using die to Quit with an Error
• Redirecting Standard Output and Standard Error to a File
• Getting Standard Input from a File

Perl Report Formatting
• Defining Report Formats
• Justifying Text (Left, Right, Center)
• Using write to Generate Reports
• Defining here Documents for Report Customization
• Creating Report Headers
• Using Built-in Variables to Control Report Appearance
• Printing Line Numbers on a Report
• Formatting Multi-Line Output
• Writing Formatted Text to a File

References
• Life Cycle of a Reference
• Hard References and Anonymous References
• Use of References to Create Complex Data Structures
• Creating Hard and Anonymous References
• Modifying References
• Dereferencing a Reference
• The Arrow Operator ->
• Building Complex Data Structures with Multi-Dimensional Arrays and Hashes

Perl Object Oriented Programming
• Object Oriented Programming Concepts
• Object Oriented Programming Terminology
• How Perl Implements Object Oriented Programming
• Modeling Software Objects Using Classes and Base Classes
• Creating Classes, Objects, Methods and Attributes
• Writing Constructors to Initialize of Objects
• Using bless to Turn References into Objects
• Creating Class Hierarchies through Inheritance

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