Subjects

JAVASCRIPT HTML CSS PYTHON SQL JAVA CPP CSHARP PHP TYPESCRIPT C RUBY GO SWIFT KOTLIN RUST R BASH SCALA OBJECTIVE-C DART PERL LUA MATLAB XML JSON MARKDOWN ASSEMBLY LATEX YAML SOLIDITY BLOCKCHAIN

Topics

Perl Basics

Introduction to Perl Installing Perl Perl Syntax Perl Variables Perl Data Types Perl Operators Perl Comments Perl Print Statements Perl Input/Output Perl Command Line Arguments

Control Structures

Perl If-Else Statements Perl Unless Statement Perl Switch Statement Perl For Loops Perl While Loops Perl Do-While Loops Perl Loop Control Statements Perl Ternary Operator

Perl Subroutines

Defining Perl Subroutines Perl Subroutine Arguments Perl Return Values Perl Anonymous Subroutines Perl Recursive Subroutines Perl Subroutine References

Perl Data Structures

Perl Arrays Perl Hashes Perl Multidimensional Arrays Perl Array and Hash Slices Perl References Perl Complex Data Structures

Perl String Manipulation

Perl String Basics Perl String Functions Perl Regular Expressions Perl Pattern Matching Perl String Formatting Perl Here Documents

Perl File Handling

Perl File Open and Close Perl File Reading Perl File Writing Perl File Appending Perl Directory Handling Perl File Test Operators

Perl Modules

Using Perl Modules Creating Perl Modules Perl Standard Modules Perl CPAN Perl Module Versioning Perl Object-Oriented Modules

Perl Object-Oriented Programming

Perl OOP Basics Perl Classes and Objects Perl Inheritance Perl Encapsulation Perl Polymorphism Perl Method Overriding

Perl Exception Handling

Perl Die and Warn Perl Eval Function Perl Try-Catch Blocks Perl Custom Exceptions Perl Error Handling Best Practices

Perl Database Interaction

Perl DBI Module Perl Database Connection Perl SQL Queries Perl Prepared Statements Perl Database Transactions

Perl Web Development

Perl CGI Programming Perl and HTML Forms Perl Session Handling Perl Cookies Perl Web Frameworks (e.g., Mojolicious)

Perl Network Programming

Perl Socket Programming Perl Client-Server Communication Perl and HTTP Perl and FTP Perl and Email Handling

Perl System Administration

Perl Process Management Perl File System Operations Perl System Information Retrieval Perl and Shell Commands Perl Log File Analysis

Perl Testing and Debugging

Perl Debugging Techniques Perl Unit Testing Perl Test::More Module Perl Code Coverage Perl Profiling

Advanced Perl Concepts

Perl References and Pointers Perl Typeglobs Perl Symbol Tables Perl Tie Interface Perl Closures Perl Benchmarking Perl Internals

Perl Module Versioning

Perl module versioning is a crucial aspect of managing and distributing Perl modules. It helps developers track changes, ensure compatibility, and communicate updates to users.

Understanding Module Versions

In Perl, module versions are typically represented as floating-point numbers. For example, version 1.23 is considered newer than 1.22. The version number is usually defined within the module itself.

Declaring Module Versions

To declare a version for your Perl module, you can use the $VERSION variable:

package MyModule;
our $VERSION = '1.23';

Alternatively, you can use the use version; pragma for more flexibility:

package MyModule;
use version; our $VERSION = version->declare("v1.2.3");

Version Comparison

Perl provides built-in mechanisms for comparing versions. The use statement can specify a minimum required version:

use MyModule 1.23; # Requires version 1.23 or higher

Best Practices for Module Versioning

Increment the version number with each release
Use semantic versioning (MAJOR.MINOR.PATCH) for clear communication of changes
Document version changes in a changelog
Test your module with different versions of its dependencies

Version Control and CPAN

When uploading modules to CPAN (Comprehensive Perl Archive Network), proper versioning is essential. It allows users to specify exact versions and helps maintain compatibility across different projects.

Using Module::Build for Versioning

The Module::Build system can help manage versions in your distribution:

use Module::Build;
my $build = Module::Build->new(
    module_name => 'MyModule',
    dist_version => '1.23',
    # other configuration options...
);
$build->create_build_script();

Conclusion

Proper module versioning is a key aspect of Perl module development. It ensures smooth updates, helps manage dependencies, and facilitates collaboration among developers. By following best practices and utilizing Perl's built-in versioning tools, you can maintain a robust and reliable module ecosystem.