Learn how to process and display time.
- [Voiceover] Perl comes with a standard set of…time functions, which inherit their properties…from the underlying C standard library.…Here's a working copy of time.pl,…from chapter 13 of the exercise files.…I'll go ahead and I'll run this…and you can see the output.…That first output is from this time() call,…and so it's assigning time() to $t.…The time() function returns an integer value,…which is the number of seconds since January 1st, 1970.…And this is, of course, inherited from the underlying…C standard library, which is based on Unix,…and so this is based the Unix epoch.…
This is really excellent for doing time on math,…so, for example here, if I wanted to add four years…to this, right?…I would say, $t += , and let's see, 60 seconds…times 60 minutes times 24 hours times 365 days,…and I know there's probably a leap year in there,…and so I'm gonna say times 4 years and plus 1,…and actually that is, that's gonna be plus one second,…not plus one day, and so I'm gonna want this here,…just say plus that, and now I get a exactly four years…
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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