Learn how to use hashes as a powerful table lookup.
- [Voiceover] Perl has an experimental switch-like feature…that uses the keywords given and when.…I need to start this subject with an important warning.…Do not use this feature in production code.…I don't say that often,…and I don't like to say that,…but this feature was introduced with Perl 5.10…and it has never worked well.…It's still considered highly experimental…and it's marked as such in the documentation.…The feature will likely change over time…and any code that uses it will probably not work…in future versions of Perl.…
Using this feature is not recommended.…I include it here just for completeness,…but again, I caution you not to use this in production code.…So here's a working copy of hello.pl…from chapter five of the exercise files.…I'm going to come down here and I'm going to…declare some variables.…My $x equals one,…$y equals two,…and $z is three.…And then I'm going to declare a variable called v…and make it equal to x.…
Now we're going to create a switch statement,…which again, in Perl, uses given and when.…
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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