In this movie, you'll be provided with an overview of how functions work in Perl.
- [Voiceover] Like most languages,…Perl provides support for user-defined functions.…In some languages,…there's a distinction between functions and subroutines…where functions return value,…and subroutines do not.…Perl does not make this distinction.…The official Perl documentation…uses both words, subroutine and function,…interchangeably and without explanation.…For my purposes, I prefer the word function.…I rarely use the word subroutine.…In Perl, a function is defined with the keyword "sub,"…followed by the name of the function,…and a block of code in curly brackets.…
Perameters are passed…in the special default array variable.…Like the default scaler variable,…the name of the defaul array variable…is an underscore character preceded by the at symbol,…which makes it an array.…The built in shift function is commonly used…to access function parameters.…It uses the default array variable…if an array is not specified.…To return a value from a function,…use the return statement.…The return value may be a scaler or a list.…
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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