Join Bill Weinman for an in-depth discussion in this video Using the OO interface for files, part of Perl 5 Essential Training.
- [Voiceover] The IO::File module…provides an object-oriented interface…for the standard file and stream functions.…This is the most common way to work with files in Perl.…So here's a working copy of iofile.pl…from chapter 12 of the exercise files.…And you'll notice down here on line 6,…I import the IO::File module,…and we'll talk about modules a little bit more later on,…but this is how you import a module.…And with the two colons there,…it indicates that the IO::File module…is part of a set of modules…that share the IO namespace.…
So down here in line 10,…we create our file handle using the IO::File module.…And in this case, our file handle is actually…referenced to an object.…So we have IO::File here with the dereferencing arrow,…which is how you access methods and properties…inside of a class or an object,…and here we're using the class IO::File…and the new method as a constructor,…to construct this new object.…And so the constructor returns the reference,…and in the constructor, we simply provide…the file mode and the file name,…
Watch to learn the details of the Perl syntax, from variables, conditionals, loops, and data structures to regular expressions, functions, and references. A quick-start guide is included for experienced developers who want to get up and running with Perl 5 fast, and the entire course is recommended for both new and experienced programmers alike. Later chapters cover file handling and reusing code with Perl modules, plus Perl best coding practices.
- Understanding Perl's general syntax and the anatomy of a Perl script
- Writing statements and expressions
- Creating assignments
- Working with variables and strings
- Using data types effectively
- Defining logical flow with conditionals and loops
- Using special variables
- Using Perl operators
- Performing simple Perl programming tasks with expressions
- Matching data
- Defining and calling functions
- Using references
- Handling files in the file I/O
- Using built-in functions
- Reusing code with modules
- Coding with Perl best practices
Skill Level Intermediate
1. Setting Up
About Perl3m 36s
2. Quick Start
3. Basic Syntax
4. Values and Variables
7. Special Variables
9. Regular Expressions
11. References and Structures
12. File I/O
13. Built-In Functions
15. Best Practices
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