Learn how to get specific values from an array.
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- Exercise Files
- [Voiceover] In Perl, you can easily access ranges…and noncontiguous elements of an array.…These array subsets are called slices.…Here's a working copy of slice.pl…from chapter four of the exercise files.…And I'll just go ahead and run it…so you can see that it lists out…with this foreach loop.…It lists all of the ten elements of this array.…So we have an array, and it's being initialized…with a quote word list of ten strings…numbered one through ten.…
If we want to access a particular element…of the array, we can use the dollar symbol…because the expression returns a scalar.…So I can come in here and I can say…$array…and when I build and run…it has the number one down at the end…because that's the first element.…And you remember that array subscripts…start at zero.…So if instead here I put in the number five…and save and run, you notice that it says six…there at the end.…
If I want more than one element,…I use the @ symbol because now it's returning a list.…And I can say one, two, three.…And you notice it says twothreefour there.…
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
Foundations of Programming: Refactoring Codewith Simon Allardice1h 44m 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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