Join Bill Weinman for an in-depth discussion in this video Matching metacharacters, part of Perl 5 Essential Training.
- [Voiceover] Perl uses a number of metacharacters…with its regular expressions.…You need to take special care in order to match…those characters in a regular expression,…and if I go ahead in here, and I put some parentheses…in my string, now when I go ahead and run it,…you can see that we have the match there,…but what if I wanted to match the parentheses…and everything within them?…So, in order to match the actual parentheses,…I need to escape the parentheses,…like this,…and so what I've done is, the parentheses…that I wanna match, I've added a backslash character before.…
That's the opening one and that's the closing one,…and then my regular parentheses, that are actually…being interpreted and used, do not have the backslash,…so if I want the regular expression engine to use…the parenthesis for the meaning of the parenthesis within…the regular expression, then I don't have to use a backslash…If I want the regular expression engine to actually match…the literal character of the parenthesis,…I need to use a backslash before it,…
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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