Softpanorama

May the source be with you, but remember the KISS principle ;-)
Contents Bulletin Scripting in shell and Perl Network troubleshooting History Humor

Perl modules

 News

Books

Recommended Links Recommended Articles CPAN Perl namespaces  

 

Getopt::Std Getopt::Long Net::ftp Net::netrc Benchmark Net::Telnet File::Find  
 Expect.pm Reimplementation of Unix tools Pipes in Perl Debugging Tips Beautifiers Humor Etc

Perl module is a package within a file which uses its own namespace. It's a collection of subroutines and variables,  Some subroutines can be "exposed" - visible in the namespace into which you incorporate the module. Technically, it is a particular set of conventions for using Perl's package mechanism that has become universally adopted. for example exporting subroutines into the namespace of the invoking script via @EXPORT mechanism provides by exporter

A Module is a collection of related subroutines and data designed to be used by other programs or modules. Modules are defined in separate files and use the package keyword to define a namespace for the data and subroutines in that module file.

A Module can be a simple collection of subroutines, not defining a class. Such modules are referred to as libraries.

A Class is a user-defined data type. Classes are defined in modules using special constructs that allow you to create variables of that type. The subroutines in these modules are referred to as methods.

An Object is a variable that belongs to a particular class. It contains its own, private data that can be operated on by the methods defined in the class. The object is called an instance of its class.

Example:

What's up with all the double colons (::)? The :: corresponds to a filesystem path separator. A Module called Shape::Rect corresponds to a file named Shape/Rect.pm relative to a module library directory. 

Perl comes with a large library of modules. In recent version it is essentially too big to be useful.  But you can be selective.

As modules use their own namespace they cannot conflict with variable in your code and thus they enhance code reuse.

A huge archive of Perl modules CPAN (Comprehensive Perl Archive Network) was collected over the time.

Some useful modules for system administration are:

Old News ;-)

 

Recommended Links

Perl module - Wikipedia, the free encyclopedia

Perl Module Mechanics by Steven McDougall  2007 March 02

This page describes the mechanics of creating, compiling, releasing and maintaining Perl modules.

This is not a reference manual. Rather, it is a running account of how to do these things. More to the point, it is an account of how I do these things. Accordingly

See also Perl Module Anatomy  by Steven McDougall. Short and not very informative notes about the contents of the .pm file

The very very short tutorial about modules in Perl [ New: 06/16/99 ]Mark-Jason Dominus a really short tutorial about Perl Modules.

The Seven Useful Uses of local

perltoot - Tom Christiansen's object-oriented tutorial for perl

IBM developerWorks: Parsing with Perl modules(Apr 30, 2000)

modules

Perl Module Primer By Dan Ragle

Perl module - Wikipedia, the free encyclopedia

Installing Your Own Perl Modules

Creating (and Maintaining) Perl Modules

Amazon.com- Perl Modules- Eric Foster-Johnson- Books

Perl Module Review- Class--Trait - O'Reilly ONLamp Blog

O'Reilly Perl Center

Writing Apache Modules with Perl and C - by Lincoln D Stein - 744 pages
Learning Perl Objects References and Modules - by Randal L Schwartz - 228 pages

Reference

Man Pages:
perlmod Perl modules (packages and symbol tables)
perlref Perl references and nested data structures
perlobj Perl objects
perltoot Tom's object-oriented tutorial for perl
perlbot Bag'o Object Tricks (advanced stuff)

Websites:

genome-www.stanford.edu/perlOOP A little collection I put together as I was learning Object-oriented Perl programming. See especially the examples page.
www.perl.com/CPAN/CPAN.html CPAN homepage
search.cpan.org Search CPAN for a module by author, category, or module name
bioperl.org The Bioperl project - modules for bioinformatics


 



Etc

FAIR USE NOTICE This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in our efforts to advance understanding of environmental, political, human rights, economic, democracy, scientific, and social justice issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit exclusivly for research and educational purposes.   If you wish to use copyrighted material from this site for purposes of your own that go beyond 'fair use', you must obtain permission from the copyright owner. 

ABUSE: IPs or network segments from which we detect a stream of probes might be blocked for no less then 90 days. Multiple types of probes increase this period.  

Society

Groupthink : Two Party System as Polyarchy : Corruption of Regulators : Bureaucracies : Understanding Micromanagers and Control Freaks : Toxic Managers :   Harvard Mafia : Diplomatic Communication : Surviving a Bad Performance Review : Insufficient Retirement Funds as Immanent Problem of Neoliberal Regime : PseudoScience : Who Rules America : Neoliberalism  : The Iron Law of Oligarchy : Libertarian Philosophy

Quotes

War and Peace : Skeptical Finance : John Kenneth Galbraith :Talleyrand : Oscar Wilde : Otto Von Bismarck : Keynes : George Carlin : Skeptics : Propaganda  : SE quotes : Language Design and Programming Quotes : Random IT-related quotesSomerset Maugham : Marcus Aurelius : Kurt Vonnegut : Eric Hoffer : Winston Churchill : Napoleon Bonaparte : Ambrose BierceBernard Shaw : Mark Twain Quotes

Bulletin:

Vol 25, No.12 (December, 2013) Rational Fools vs. Efficient Crooks The efficient markets hypothesis : Political Skeptic Bulletin, 2013 : Unemployment Bulletin, 2010 :  Vol 23, No.10 (October, 2011) An observation about corporate security departments : Slightly Skeptical Euromaydan Chronicles, June 2014 : Greenspan legacy bulletin, 2008 : Vol 25, No.10 (October, 2013) Cryptolocker Trojan (Win32/Crilock.A) : Vol 25, No.08 (August, 2013) Cloud providers as intelligence collection hubs : Financial Humor Bulletin, 2010 : Inequality Bulletin, 2009 : Financial Humor Bulletin, 2008 : Copyleft Problems Bulletin, 2004 : Financial Humor Bulletin, 2011 : Energy Bulletin, 2010 : Malware Protection Bulletin, 2010 : Vol 26, No.1 (January, 2013) Object-Oriented Cult : Political Skeptic Bulletin, 2011 : Vol 23, No.11 (November, 2011) Softpanorama classification of sysadmin horror stories : Vol 25, No.05 (May, 2013) Corporate bullshit as a communication method  : Vol 25, No.06 (June, 2013) A Note on the Relationship of Brooks Law and Conway Law

History:

Fifty glorious years (1950-2000): the triumph of the US computer engineering : Donald Knuth : TAoCP and its Influence of Computer Science : Richard Stallman : Linus Torvalds  : Larry Wall  : John K. Ousterhout : CTSS : Multix OS Unix History : Unix shell history : VI editor : History of pipes concept : Solaris : MS DOSProgramming Languages History : PL/1 : Simula 67 : C : History of GCC developmentScripting Languages : Perl history   : OS History : Mail : DNS : SSH : CPU Instruction Sets : SPARC systems 1987-2006 : Norton Commander : Norton Utilities : Norton Ghost : Frontpage history : Malware Defense History : GNU Screen : OSS early history

Classic books:

The Peter Principle : Parkinson Law : 1984 : The Mythical Man-MonthHow to Solve It by George Polya : The Art of Computer Programming : The Elements of Programming Style : The Unix Haterís Handbook : The Jargon file : The True Believer : Programming Pearls : The Good Soldier Svejk : The Power Elite

Most popular humor pages:

Manifest of the Softpanorama IT Slacker Society : Ten Commandments of the IT Slackers Society : Computer Humor Collection : BSD Logo Story : The Cuckoo's Egg : IT Slang : C++ Humor : ARE YOU A BBS ADDICT? : The Perl Purity Test : Object oriented programmers of all nations : Financial Humor : Financial Humor Bulletin, 2008 : Financial Humor Bulletin, 2010 : The Most Comprehensive Collection of Editor-related Humor : Programming Language Humor : Goldman Sachs related humor : Greenspan humor : C Humor : Scripting Humor : Real Programmers Humor : Web Humor : GPL-related Humor : OFM Humor : Politically Incorrect Humor : IDS Humor : "Linux Sucks" Humor : Russian Musical Humor : Best Russian Programmer Humor : Microsoft plans to buy Catholic Church : Richard Stallman Related Humor : Admin Humor : Perl-related Humor : Linus Torvalds Related humor : PseudoScience Related Humor : Networking Humor : Shell Humor : Financial Humor Bulletin, 2011 : Financial Humor Bulletin, 2012 : Financial Humor Bulletin, 2013 : Java Humor : Software Engineering Humor : Sun Solaris Related Humor : Education Humor : IBM Humor : Assembler-related Humor : VIM Humor : Computer Viruses Humor : Bright tomorrow is rescheduled to a day after tomorrow : Classic Computer Humor

The Last but not Least


Copyright © 1996-2016 by Dr. Nikolai Bezroukov. www.softpanorama.org was created as a service to the UN Sustainable Development Networking Programme (SDNP) in the author free time. This document is an industrial compilation designed and created exclusively for educational use and is distributed under the Softpanorama Content License.

The site uses AdSense so you need to be aware of Google privacy policy. You you do not want to be tracked by Google please disable Javascript for this site. This site is perfectly usable without Javascript.

Original materials copyright belong to respective owners. Quotes are made for educational purposes only in compliance with the fair use doctrine.

FAIR USE NOTICE This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available to advance understanding of computer science, IT technology, economic, scientific, and social issues. We believe this constitutes a 'fair use' of any such copyrighted material as provided by section 107 of the US Copyright Law according to which such material can be distributed without profit exclusively for research and educational purposes.

This is a Spartan WHYFF (We Help You For Free) site written by people for whom English is not a native language. Grammar and spelling errors should be expected. The site contain some broken links as it develops like a living tree...

You can use PayPal to make a contribution, supporting development of this site and speed up access. In case softpanorama.org is down you can use the at softpanorama.info

Disclaimer:

The statements, views and opinions presented on this web page are those of the author (or referenced source) and are not endorsed by, nor do they necessarily reflect, the opinions of the author present and former employers, SDNP or any other organization the author may be associated with. We do not warrant the correctness of the information provided or its fitness for any purpose.

Last updated: September 12, 2017