Discover how to match text with regular expressions.
- [Voiceover] The fundamental purpose…of regular expressions is to match text.…The match operator returns a logical value.…And so, down here in line nine,…you notice that the match operator…is used in a logical test for the if statement.…So that's the match operator right there,…the equals sign and the tilde symbol.…And so if this match succeeds,…and there is a match, it'll say True.…And if there is no match, it'll say False.…
So we see that in the regular expression there…we have this string l i n e, line.…And you'll see that it's also in the string…that we're testing against, $s,…which is listed here as the string…in the match operator.…And so if I run this, we should get True…as our result, and we do.…So this is a simple way to test a regular expression.…Another common way to test a regular expression…is by using a precompiled regular expression…and using a ternary operator.…
So that would look something like this.…My $re, so that's for the precompiled regular expression…which we precompile using the qr operator.…
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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