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Chapter 12. Using Modules

A module is a building block for your program: a set of related subroutines and variables packaged so it can be reused. This chapter looks at the basics of modules: how to bring in modules that others have written, and how to write modules of your own.



    		Chapter 1. Introduction
    		Chapter 2. Building Larger Programs
    		Chapter 3. Introduction to References
    		Chapter 4. References and Scoping
    		Chapter 5. Manipulating Complex Data Structures
    		Chapter 6. Subroutine References
    		Chapter 7. Practical Reference Tricks
    		Chapter 8. Introduction to Objects
    		Chapter 9. Objects with Data
    		Chapter 10. Object Destruction
    		Chapter 11. Some Advanced Object Topics
    		Chapter 12. Using Modules
    		12.1 Sample Function-Oriented Interface: File::Basename
    		12.2 Selecting What to Import
    		12.3 Sample Object-Oriented Interface: File::Spec
    		12.4 A More Typical Object-Oriented Module: Math::BigInt
    		12.5 The Differences Between OO and Non-OO Modules
    		12.6 What use Is Doing
    		12.7 Setting the Path at the Right Time
    		12.8 Importing with Exporter
    		12.9 @EXPORT and @EXPORT_OK
    		12.10 Exporting in a Primarily OO Module
    		12.11 Custom Import Routines
    		12.12 Exercise
    		Chapter 13. Writing a Distribution
    		Chapter 14. Essential Testing
    		Chapter 15. Contributing to CPAN
    		Appendix A. Answers to Exercises