Discover the major parts of a Perl script.
- In this lesson,…we'll take a look at the parts of a common Perl script.…Here's a working copy of Hello.pl…from Chapter 3 of the exercise files.…This is a very simple Perl script.…I'm gonna go ahead and run it…and you can see the output down there.…It says "Hello, World!"…It's not the simplest Perl script you can write,…but it probably is the simplest Perl script…that you should write.…Let's take a look at what's here and why.…Here on the first line, this is called the "Shebang Line."…It is named for the fact that the exclamation mark…is often called a bang and the line itself is read…from the invoking shell.…
So, "shell-bang" or "shebang."…Perl was substantially inspired by Unix shell scripting…and the shebang line is an old,…Unix shell scripting tradition.…When a Unix shell, such as bash or born, loads a script,…it looks first at the first two bytes to see what…type of file it is.…If it sees these two characters in the position of the first…two bytes,…the hash mark and the bang mark,…it will look at the rest of the line…
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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