Join Bill Weinman for an in-depth discussion in this video Matching wildcards, part of Perl 5 Essential Training.
- Regular expressions have a simple, yet powerful,…system of wildcards.…Here's a working copy of wildcards.pl…from chapter nine of the Exercise Files.…And this is very much like our previous examples,…except it's displaying the match with the $1…and the parentheses in the regular expression,…so when I run this, it says Match is: text.…So, this is just matching a literal string.…If I put a period in here instead of the e,…that's a wildcard.…
And so, that will match t and any character,…and then x and t.…So, I run this, it still says Match is: text.…But if I come up here and change this e to a z…and I run that, now it says Match text is: tZxt.…On the other hand, if I put this back and I move that dot…to after the word text, you notice that it comes up…and it says false, because you cannot match…past the end of the string.…
I could also match one or more of a particular character.…So, if I run this, it'll get the matches t.…And, on the other hand, if I put in a bunch of t's here…and I run this, it'll match all five of them, 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
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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