Discover functions for lists and arrays.
- [Voiceover] Perl has a number of useful functions…for working with lists and arrays.…We've already seen push, pop, shift, and unshift.…Here's a few other useful functions.…Here I have a working copy of array.pl…from chapter 13 of the exercise files,…and when I run this, you see we have a list…of elements from this array.…So let's start with the grep function.…The grep function searches and locates elements…in a list or array that test true against a given,…regular expression.…
So I can say grep and give it a regular expression…and the array, and when I run this,…you notice that it's only finding the elements…in that array that match that expression.…In this case, I was looking for anything with a t in it.…I can also give it a negative expression…by putting an exclamation point…in front of the regular expression.…This will search for elements that do not match that,…and so here I get the other two.…There's also an alternative syntax for grep with…instead of just the regular expression,…it actually includes a block where you can do…
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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