Learn how to use the default array variable for function call parameters.
- [Voiceover] The default array variable is used…to pass arguments to a function.…Here's a working copy of deffunc.pl,…from chapter seven of the exercise files,…and you'll notice we have a function call,…and we're passing it three arguments.…The strings one, two, and three,…and there's the function defined,…and you notice that it uses this…save for each, and @_…that is the default array variable.…It's like the default scalar variable, only it's for arrays,…so when I run this, you notice it displays.…
This is func1, and then one, two, and three.…Which are the elements in that array, so this function call…has passed this array into the function.…This default array just happens automatically,…you don't need to do anything to initialize it,…Perl does that for you, so if you wanna use those values…in scalar variables inside of your function,…and that's a very common thing to do.…You can do something like this,…and when I run that, you see it says, one two three,…down at the bottom, so it is displaying those variables,…
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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