Learn functions for working with text and strings.
- [Voiceover] Perl provides a number of useful…functions for working with strings.…Here's a working copy of string.pl from…chapter 13 of the exercise files…and you'll notice that we have a string here…and if I run this, it outputs that string…to the screen using the say function.…Now, if I want to, I can get the length of the string…and I can say length of string…and I can run that and it tells us…the length of the string is 51, and again,…because this is a built in function…I don't actually need the parentheses…and that works just exactly the same.…
The chomp function will remove line endings, if any,…and so in this case it returns the number…of characters removed and so if I put in…a new line at the end here, and I run this…you see it's removed one character.…And if I go ahead and simply say string,…a couple of times you'll see that it's got…extra line endings in it.…If I come up here and I say chomp $string,…then it takes those extra line endings out, it just…has the one line ending for each line that say provides.…
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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