Create rich data structures using mixed reference types.
- Much of the power of references is the ability…to mix different types of data into one data structure.…Here's a working copy of mixed.pl…from chapter 11 of the Exercise Files.…And you'll notice that I have here a reference…to an anonymous array with anonymous hashes…in each element of the array.…So, the square brackets at the beginning and end here…of this structure, that indicates the anonymous array.…And then, each of these lines is an anonymous hash…enclosed in the curly brackets,…with name, instrument, and genre for each of the keys.…
And then, down here for each loop,…I go through the array, and for each element of the array,…then I de-reference the hash for the results.…And so, when I run this, you see I get,…in the order, because it's an array and a for each loop,…I get Jimi Hendrix, Miles Davis, Yo-Yo Ma, and Frank Zappa.…Now, given this structure, I can add a row or add a record…with a push, like that.…And then, when I run it, you see we have one more element…in our array, Elton John, plays piano and plays rock.…
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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