References are an important part of the Perl language.
- [Voiceover] A reference is a scaler…that refers to a value.…The target value may be a scaler, an array,…a hash, or a function.…The reference itself is a scaler value.…You create a reference with the backslash character.…You may create a reference to a scaler,…an array, a hash, or a function.…You may then access the target value…by dereferencing using the correct type symbol…and enclosing the scaler reference in curly brackets.…
Or for convenience, you may use the arrow operator…to dereference and access structure members…at the same time.…References allow the use of anonymous arrays,…hashes, and functions.…This can be extremely handy…for creating complex data structures.…If you need to know the type of reference,…you may use the ref function.…The ref function returns a string indicating the type…of the referenced value.…References are an important part of the Perl language.…You'll use them to create rich, complex data structures,…and you will see them often in existing code.…
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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