Join Bill Weinman for an in-depth discussion in this video Understanding streams and files, part of Perl 5 Essential Training.
- [Voiceover] When we think of a file, we tend to think…of a block of data on some kind of media:…a hard drive or a memory card,…or some fixed physical media.…Most operating systems deal with a file…as a stream of data, rather than blocks of data.…This allows the system to buffer the data,…and to provide it to client processes in manageable chunks.…This also allows a system to treat…many different data sources in the same way.…So a stream may be data read from,…or written to a file in the file system,…the network, or even the screen and keyboard.…
In Perl, like most modern languages,…a file may be any number of things,…and Perl handles these various data sources…in similar ways, often indistinguishably so.…For the sake of simplicity,…all of these things are typically referred to as files.…While there are different things,…and they have different properties,…from the perspective of your code,…they work in pretty much the same way.…So I tend to use the term file to refer to them,…unless something more specific is required.…
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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