The Wayback Machine - http://web.archive.org./web/20121222160408/http://wn.com:80/Perl
Saturday, 22 December 2012
Loading...
Lecture - 21 PERL - Part I
Lecture - 22 PERL - Part II
Perl Tutorial 1 - Active Perl, Perl Editor, Hello World
Modern Perl Tutorial - part 01 - Install Perl, print Hello World
Hak5 - Graphing Twitter Connections with Perl and Graphviz
Perl Programming - 1 - Getting Started [Linux /Mac/ Windows]
Ελεωνόρα Ζουγανέλη - Παντελής Κόντος Vivo perl lei
Lets Play Pokemon Perl #9 - 1. Arena
Let´s Play Pokemon Perl Part 38: Bis in den Nebel
Lets Play Pokemon Perl #10
Hak5 - Cloud backups with Amazon S3, Man-in-the-middle attacks made easy, Network Enumeration & Hash ...
Pokemon Smaragd - Let's Play Pokemon Smaragd Part 83

Perl

  • Loading...
Loading suggestions ...








Make changes yourself !



Lecture - 21 PERL - Part I
  • Order:
  • Duration: 59:41
  • Updated: 14 Dec 2012
Lecture Series on Internet Tecnologies by Prof. I. Sengupta, Department of Computer Science Engineering, IIT Kharagpur. For more details on NPTEL visit nptel.iitm.ac.in
  • published: 07 Aug 2008
  • views: 93690
  • author: nptelhrd
http://web.archive.org./web/20121222160408/http://wn.com/Lecture - 21 PERL - Part I
Lecture - 22 PERL - Part II
  • Order:
  • Duration: 59:55
  • Updated: 08 Dec 2012
Lecture Series on Internet Tecnologies by Prof. I. Sengupta, Department of Computer Science Engineering, IIT Kharagpur. For more details on NPTEL visit nptel.iitm.ac.in
  • published: 07 Aug 2008
  • views: 47267
  • author: nptelhrd
http://web.archive.org./web/20121222160408/http://wn.com/Lecture - 22 PERL - Part II
Perl Tutorial 1 - Active Perl, Perl Editor, Hello World
  • Order:
  • Duration: 3:46
  • Updated: 20 Dec 2012
ALL 125 PERL VIDEOS ARE NOW AVAILABLE TO STREAM AT: www.ScriptSocket.com Part 1 of the Perl Tutorial features details on where to download Active Perl, where to download a good Perl Editor and how to say 'Hello World'.
  • published: 24 Nov 2007
  • views: 107318
  • author: bermnz
http://web.archive.org./web/20121222160408/http://wn.com/Perl Tutorial 1 - Active Perl, Perl Editor, Hello World
Modern Perl Tutorial - part 01 - Install Perl, print Hello World
  • Order:
  • Duration: 9:34
  • Updated: 04 Dec 2012
The first part of a new series of Perl Tutorials. We are starting to use the "Padre on Strawberry Perl for Windows" package but we'll also see example using Linux. To download the "Padre on Strawberry Perl" package visit padre.perlide.org Exercise and blog related to this video can be found here: szabgab.com For all the tutorial visit szabgab.com The Modern Perl book mentioned in the screencast can be found here: www.onyxneon.com
  • published: 24 Jun 2011
  • views: 6430
  • author: gabor529
http://web.archive.org./web/20121222160408/http://wn.com/Modern Perl Tutorial - part 01 - Install Perl, print Hello World
Hak5 - Graphing Twitter Connections with Perl and Graphviz
  • Order:
  • Duration: 9:37
  • Updated: 15 Nov 2012
Soldering 101: Shannon builds a network tap. Perl and GraphViz for mapping twitter connections. Chrome tips and deauthing WiFi. All that and more this time on Hak5.
  • published: 29 Jun 2011
  • views: 8890
  • author: Hak5Darren
http://web.archive.org./web/20121222160408/http://wn.com/Hak5 - Graphing Twitter Connections with Perl and Graphviz
Perl Programming - 1 - Getting Started [Linux /Mac/ Windows]
  • Order:
  • Duration: 8:13
  • Updated: 21 Dec 2012
This Tutorial Teaches You On How to Install Perl on Linux/Mac/Windows *********************************************************************************** For Linux *********** 1.) Open Terminal and Type in "sudo bash" to Log in as root 2.) Then type in "sudo apt-get install perl" to install Perl 3.) Type in "perl -v" to see if Perl is installed For Mac ********* 1.) Open the Terminal.app and copy & paste the command below into it curl -L xrl.us | bash View the Original Mac OSX Perl Tutorial : adf.ly For Windows *************** 1.) Download Perl : adf.ly 2.) Install ************************* For More Perl Download Options : adf.ly ************************
http://web.archive.org./web/20121222160408/http://wn.com/Perl Programming - 1 - Getting Started [Linux /Mac/ Windows]
Ελεωνόρα Ζουγανέλη - Παντελής Κόντος Vivo perl lei
  • Order:
  • Duration: 3:03
  • Updated: 22 Dec 2012
Κάθε ερμηνεία της και ένα νέο μουσικό ταξίδι!!!!! Έχει την ικανότητα να μας μαγεύει και να μας ταξιδεύει στα δικά της μουσικά μονοπάτια και να μας κάνει ολοκληρωτικά δικούς της!!!! Μια πολύ γλυκιά ερμηνεία εκφρασμένη με πολύ πάθος,ένταση,συναίσθημα, δόσιμο!!!!
http://web.archive.org./web/20121222160408/http://wn.com/Ελεωνόρα Ζουγανέλη - Παντελής Κόντος Vivo perl lei
Lets Play Pokemon Perl #9 - 1. Arena
  • Order:
  • Duration: 10:41
  • Updated: 21 Dec 2012
Der 1. Arenaleiter Seine Pokemon: Kleinstein Level12 Onix Level12 Koknodon Level14
  • published: 20 Dec 2012
  • views: 3
  • author: OtzeLP
http://web.archive.org./web/20121222160408/http://wn.com/Lets Play Pokemon Perl #9 - 1. Arena
Let´s Play Pokemon Perl Part 38: Bis in den Nebel
  • Order:
  • Duration: 13:49
  • Updated: 22 Dec 2012
Und noch viel weiter... Viel Spaß! ^^ Projekt-Tagebuch: - Wir verfolgen weiter den Galaktik Rüpel - Es kommt zum Kampf gegen ihn, der schnell ausgeht - Können ihn nicht weiter verfolgen, da der Kühnheitssee noch gesperrt ist - Treffen auf Cynthia, die uns auf einen Gefallen hin zu den Enton auf Route 201 mit dem Geheimtrank schickt - Heilen die Enton von ihren chronischen Kopfschmerzen und können auf die nächste Route
  • published: 21 Dec 2012
  • views: 9
  • author: Fnupa
http://web.archive.org./web/20121222160408/http://wn.com/Let´s Play Pokemon Perl Part 38: Bis in den Nebel
Lets Play Pokemon Perl #10
  • Order:
  • Duration: 11:25
  • Updated: 22 Dec 2012
Team Galaktik schon wieder
  • published: 22 Dec 2012
  • author: OtzeLP
http://web.archive.org./web/20121222160408/http://wn.com/Lets Play Pokemon Perl #10
Hak5 - Cloud backups with Amazon S3, Man-in-the-middle attacks made easy, Network Enumeration & Hash ...
  • Order:
  • Duration: 40:18
  • Updated: 21 Dec 2012
Shannon shows us how to perform arp cache poisoning attacks with ease. Jason joins us for a little cloud backup action using Perl and Amazon S3. Darren covers cracking the code: network enumeration and hash cracking. Plus promiscuous mode wifi cards, hacked Canon EOS firmware, and a whole lot more.
  • published: 23 Mar 2011
  • views: 21775
  • author: Hak5Darren
http://web.archive.org./web/20121222160408/http://wn.com/Hak5 - Cloud backups with Amazon S3, Man-in-the-middle attacks made easy, Network Enumeration & Hash ...
Pokemon Smaragd - Let's Play Pokemon Smaragd Part 83
  • Order:
  • Duration: 10:51
  • Updated: 24 Nov 2012
Let's Play Pokemon Smaragd Part 83: Ankunft in der Kampfzone HD - Trainerkämpfe auf der Fähre - Kampfzone wird erreicht und kurz besichtigt - Wer ist Scott? Hier die Auflösung! - weiter gehts für mich auf Rute 132
  • published: 27 May 2010
  • views: 5693
  • author: Geilkind
http://web.archive.org./web/20121222160408/http://wn.com/Pokemon Smaragd - Let's Play Pokemon Smaragd Part 83
Pokemon Smaragd - Let's Play Pokemon Smaragd Part 40
  • Order:
  • Duration: 10:29
  • Updated: 21 Dec 2012
Let's Play Pokemon Smaragd Part 40: Ein Programmierfehler? HD - Caleb ("Rubinnischara") kommentiert weiter mit! - Team Aqua wird weiter eliminiert - Rostock-Düsseldorf Vorfall ist ein Thema - 3 Spiele Sperre!!! - Team Aqua wurde vertrieben - kurz darauf folgt ein Kampf mit Maike - Programmierfehler bei Maike?! - Ich bekomme die VM Fliegen - Scott spioniert auch schon wieder...
  • published: 17 May 2010
  • views: 4290
  • author: Geilkind
http://web.archive.org./web/20121222160408/http://wn.com/Pokemon Smaragd - Let's Play Pokemon Smaragd Part 40
Pokemon Smaragd - Let's Play Pokemon Smaragd Part 23
  • Order:
  • Duration: 10:54
  • Updated: 24 Nov 2012
Let's Play Pokemon Smaragd Part 23: Laubwechselfeld und Mc Donalds HD - Trainerkill - Meine Meinung übers Mc Donalds Frühstück - Ein guter Rat: Die Flöten holen! - Laubwechselfeld erreicht - kleine Stadt besichtigt
  • published: 13 May 2010
  • views: 4940
  • author: Geilkind
http://web.archive.org./web/20121222160408/http://wn.com/Pokemon Smaragd - Let's Play Pokemon Smaragd Part 23
  • Lecture - 21 PERL - Part I...59:41
  • Lecture - 22 PERL - Part II...59:55
  • Perl Tutorial 1 - Active Perl, Perl Editor, Hello World...3:46
  • Modern Perl Tutorial - part 01 - Install Perl, print Hello World...9:34
  • Hak5 - Graphing Twitter Connections with Perl and Graphviz...9:37
  • Perl Programming - 1 - Getting Started [Linux /Mac/ Windows]...8:13
  • Ελεωνόρα Ζουγανέλη - Παντελής Κόντος Vivo perl lei...3:03
  • Lets Play Pokemon Perl #9 - 1. Arena...10:41
  • Let´s Play Pokemon Perl Part 38: Bis in den Nebel...13:49
  • Lets Play Pokemon Perl #10...11:25
  • Hak5 - Cloud backups with Amazon S3, Man-in-the-middle attacks made easy, Network Enumeration & Hash ......40:18
  • Pokemon Smaragd - Let's Play Pokemon Smaragd Part 83...10:51
  • Pokemon Smaragd - Let's Play Pokemon Smaragd Part 40...10:29
  • Pokemon Smaragd - Let's Play Pokemon Smaragd Part 23...10:54
Lecture Series on Internet Tecnologies by Prof. I. Sengupta, Department of Computer Science Engineering, IIT Kharagpur. For more details on NPTEL visit nptel.iitm.ac.in
  • published: 07 Aug 2008
  • views: 93690
  • author: nptelhrd

59:41
Lec­ture - 21 PERL - Part I
Lec­ture Se­ries on In­ter­net Tec­nolo­gies by Prof. I. Sen­gup­ta, De­part­ment of Com­put­er Sci­enc...
pub­lished: 07 Aug 2008
au­thor: nptelhrd
59:55
Lec­ture - 22 PERL - Part II
Lec­ture Se­ries on In­ter­net Tec­nolo­gies by Prof. I. Sen­gup­ta, De­part­ment of Com­put­er Sci­enc...
pub­lished: 07 Aug 2008
au­thor: nptelhrd
3:46
Perl Tu­to­ri­al 1 - Ac­tive Perl, Perl Ed­i­tor, Hello World
ALL 125 PERL VIDEOS ARE NOW AVAIL­ABLE TO STREAM AT: www.​ScriptSocket.​com Part 1 of the Per...
pub­lished: 24 Nov 2007
au­thor: bermnz
9:34
Mod­ern Perl Tu­to­ri­al - part 01 - In­stall Perl, print Hello World
The first part of a new se­ries of Perl Tu­to­ri­als. We are start­ing to use the "Padre on Str...
pub­lished: 24 Jun 2011
au­thor: gabor529
9:37
Hak5 - Graph­ing Twit­ter Con­nec­tions with Perl and Graphviz
Sol­der­ing 101: Shan­non builds a net­work tap. Perl and GraphViz for map­ping twit­ter con­nect...
pub­lished: 29 Jun 2011
au­thor: Hak5­Dar­ren
8:13
Perl Pro­gram­ming - 1 - Get­ting Start­ed [Linux /Mac/ Win­dows]
This Tu­to­ri­al Teach­es You On How to In­stall Perl on Linux/Mac/Win­dows ********************...
pub­lished: 30 May 2012
3:03
Ελεωνόρα Ζουγανέλη - Παντελής Κόντος Vivo perl lei
Κάθε ερμηνεία της και ένα νέο μουσικό ταξίδι!!!!! Έχει την ικανότητα να μας μαγεύει και να...
pub­lished: 16 Dec 2012
10:41
Lets Play Poke­mon Perl #9 - 1. Arena
Der 1. Are­naleit­er Seine Poke­mon: Kle­in­stein Lev­el12 Onix Lev­el12 Ko­kn­odon Lev­el14...
pub­lished: 20 Dec 2012
au­thor: OtzeLP
13:49
Let´s Play Poke­mon Perl Part 38: Bis in den Nebel
Und noch viel weit­er... Viel Spaß! ^^ Pro­jekt-Tage­buch: - Wir ver­fol­gen weit­er den Galak­ti...
pub­lished: 21 Dec 2012
au­thor: Fnupa
11:25
Lets Play Poke­mon Perl #10
Team Galak­tik schon wieder...
pub­lished: 22 Dec 2012
au­thor: OtzeLP
40:18
Hak5 - Cloud back­ups with Ama­zon S3, Man-in-the-mid­dle at­tacks made easy, Net­work Enu­mer­a­tion & Hash ...
Shan­non shows us how to per­form arp cache poi­son­ing at­tacks with ease. Jason joins us for ...
pub­lished: 23 Mar 2011
au­thor: Hak5­Dar­ren
10:51
Poke­mon Smaragd - Let's Play Poke­mon Smaragd Part 83
Let's Play Poke­mon Smaragd Part 83: Ankun­ft in der Kampf­zone HD - Train­erkämpfe auf der Fä...
pub­lished: 27 May 2010
au­thor: Geilkind
10:29
Poke­mon Smaragd - Let's Play Poke­mon Smaragd Part 40
Let's Play Poke­mon Smaragd Part 40: Ein Pro­gram­mier­fehler? HD - Caleb ("Ru­bin­nis­chara") ko...
pub­lished: 17 May 2010
au­thor: Geilkind
10:54
Poke­mon Smaragd - Let's Play Poke­mon Smaragd Part 23
Let's Play Poke­mon Smaragd Part 23: Laub­wech­selfeld und Mc Don­alds HD - Train­erkill - Mein...
pub­lished: 13 May 2010
au­thor: Geilkind
Youtube results:
10:36
Poke­mon Smaragd - Let's Play Poke­mon Smaragd Part 81
Let's Play Poke­mon Smaragd Part 81: Das Fi­nale der Poke­mon Liga HD - Bay­ern hat das Champi...
pub­lished: 27 May 2010
au­thor: Geilkind
10:50
Poke­mon Bloody Patin - Let's Play Poke­mon Bloody Platin Part 5 - Darf der Foka vor­spulen?
Hier ist mein brand­neues Pro­jekt :] Ein Let's Play zu Poke­mon Bloody Platin. Bloody Platin...
pub­lished: 28 Apr 2010
au­thor: FokaXI­II
10:51
Poke­mon Bloody Patin - Let's Play Poke­mon Bloody Platin Part 53 - Wir erk­lim­men den Krater­berg
Hier ist mein brand­neues Pro­jekt :] Ein Let's Play zu Poke­mon Bloody Platin. Bloody Platin...
pub­lished: 11 Oct 2010
au­thor: FokaXI­II
10:52
Poke­mon Bloody Patin - Let's Play Poke­mon Bloody Platin Part 38 - Juhu­u­uu endlich wieder ein neues Mit­glied
Hier ist mein brand­neues Pro­jekt :] Ein Let's Play zu Poke­mon Bloody Platin. Bloody Platin...
pub­lished: 07 Sep 2010
au­thor: FokaXI­II
photo: AP / Fahd al-Bakoush
This still image included in a video obtained by the Associated Press from Fahd al-Bakoush, a freelance videographer and activist, which has been authenticated based on its contents and other AP reporting, shows the body of U.S. Ambassador Chris Stevens being moved by Libyan civilians trying to rescue him after gunmen and protesters rampaged through the U.S. consulate in Benghazi, Libya, Tuesday, Sept. 11, 2012. The group of Libyans had stumbled across Stevens' seemingly lifeless form inside a dark room and didn't know who he was, only that he was a foreigner, al-Bakoush and two other witnesses told the AP.
Reuters
20 Dec 2012
WASHINGTON (Reuters) - Three senior U.S. State Department officials were asked to resign after an official inquiry harshly criticized their offices for failing to provide adequate security at the U.S. mission in Benghazi, Libya, before it came under attack in September, a U.S. official said on Wednesday ... State Department officials declined to comment on the matter, saying it was a personnel issue ... Joint Chiefs of Staff ... facilities....(size: 5.4Kb)
photo: AP / Carolyn Kaster
FILE - In this June 26, 2012 file photo, President Barack Obama speaks in Atlanta. The presidential race enters the sultry summer _ a final lull before a sprint to Election Day _ with President Barack Obama and Republican Mitt Romney neck and neck and no sign that either can break away. Both sides have money concerns _ for all the flood of cash _ as well as political worries.
Sowetan Live
20 Dec 2012
Obama held a White House news conference on Wednesday to announce that Vice President Joe Biden will lead an interagency effort to craft new gun policies. The group is expected to offer its proposals in January. “We know this is a complex issue that stirs deeply held passions and political divides,” Obama said. “But the fact that this problem is complex can no longer be an excuse for doing nothing.” ... WAKE-UP CALL ... ....(size: 6.1Kb)
photo: AP / Alfred de Montesquiou
In this May 12, 2010 photo, Malian troops and soldiers from other African countries train with the U.S. Special Forces in the Sahara Desert near the town of Gao in northeastern Mali.
Pittsburgh Post-Gazette
21 Dec 2012
UNITED NATIONS -- The U.N. Security Council on Thursday authorized military action to wrest northern Mali from the control of al-Qaida-linked extremists, but it demanded progress first on political reconciliation, elections and training African troops and police ... Instead, it set out benchmarks to be met before the start of offensive operations, starting with progress on a political roadmap to restore constitutional order ... U.N ... On Nov ... ....(size: 3.1Kb)
photo: AP / Narciso Contreras
In this Monday, Dec. 17, 2012 photo, a man runs between debris after a mortar shell hit a street killing several people in the Bustan Al-Qasr district of Aleppo, Syria.
The Star
19 Dec 2012
GENEVA (Reuters) - The United Nations appealed on Wednesday for $1.5 billion (920.1 million pounds) to provide life-saving aid to Syrians suffering from a "dramatically deteriorating" humanitarian situation ... "The magnitude of this humanitarian crisis is indisputable," said Radhouane Nouicer, U.N ... Inside Syria, U.N ... ....(size: 1.5Kb)
photo: AP / Ahn Young-joon
South Korea's president-elected Park Geun-hye speaks during a press conference at the headquarters of Saenuri Party in Seoul, South Korea, Thursday, Dec. 20, 2012.
The Wichita Eagle
20 Dec 2012
SEOUL, South KoreaPark Geun-hye's election as South Korea's first female president could mean a new drive to start talks with bitter rival North Korea, though it's unclear how much further she will go than the hard-line incumbent, a member of her own conservative party ... On Thursday, Park mentioned the North Korean rocket launch during a nationally televised speech ... Ties between the Koreas plummeted during Lee's term ... ....(size: 4.5Kb)



The New York Times
22 Dec 2012
 Premium Crossword. Saturday Puzzle ». By Tim Croce. Dec. 22, 2012Across Lite »Answers at XWord Info »Syndicated crossword ». Premium Crosswords is available through subscription only ... I STAND CORRECTED. There doesn’t seem to be such a conceit, but I enjoyed the solve anyway. There’s a lot of great stuff in this 64-worder, not the least of which is CARBON FOOTPRINT, I STAND CORRECTED, AS THE SAYING GOES and BAR EXAM ... Perl ... ....(size: 8.3Kb)
Lehigh Valley
22 Dec 2012
AP Photo . M. SPENCER GREEN  . EDITOR'S NOTE -- Whether for athletics or age, Americans from teenagers to baby boomers are trying to get an edge by illegally using anabolic steroids and human growth hormone, despite well-documented risks. This is the second of a two-part series ... U.S ... And U.S ... For the Money ... last year ... And usually with impunity ... The No ... Tom Perls, a leading industry critic who does aging research at Boston University ... ....(size: 8.7Kb)
Detroit news
22 Dec 2012
Terry Foster Comments. Central Michigan coach Dan Enos and his Chippewas team will likely bring a strong contingent of CMU students to Ford Field Dec. 26. (Associated Press). Detroit The Little Caesars Pizza Bowl always is better with a Big Ten team in it ... When the bowl was founded by former Michigan State football coach George Perles and Hoffman, his former public relations man, it was not expected to last long ... "Are you nuts?" ... Who ... TV ... 15....(size: 12.2Kb)
my SA
22 Dec 2012
A federal crackdown on illicit foreign supplies of human growth hormone has failed to stop rampant misuse, and instead has driven record sales of the drug by some of the world's biggest pharmaceutical companies, an Associated Press investigation shows ... But since then, Big Pharma has been satisfying the steady desires of U.S ... ___ ... ___ ... U.S ... And U.S ... last year ... Tom Perls, a leading industry critic who does aging research at Boston University....(size: 10.0Kb)
Irish Times
21 Dec 2012
Etzion bloc council chairman Davidi Perl said the master-plan for Gevaot included 5,000-6,000 homes, making it the West Bank’s fifth settler city, with a projected population of about 25,000 ... and the pressure from within Israel and outside, which question our very right to build and grow strong in the land of Israel,” Mr Perl said....(size: 2.6Kb)
Business Journal
21 Dec 2012
Steve Tapp commented on Arnold Perl unexpectedly retires as chairman of Memphis Airport Authority board on Thursday, December 20th....(size: 10.6Kb)
Yahoo Daily News
21 Dec 2012
... Paula Hammond; Brazilian Enterprise for Planning and Logistics Director Hélio Mauro França; Simon Fraser University's Urban Studies Program Director Anthony Perl; and Spain's Fundación Caminos de Hierro Board Chair Eduardo Romo ... Anthony Perl was presented the Transport Revolution Award as an advocate for sweeping change in American transportation....(size: 6.5Kb)
Business Journal
21 Dec 2012
Steve Tapp commented on Arnold Perl unexpectedly retires as chairman of Memphis Airport Authority board on Thursday, December 20th Like the Memphis Business Journal....(size: 10.8Kb)
Business Journal
21 Dec 2012
Steve Tapp commented on Arnold Perl unexpectedly retires as chairman of Memphis Airport Authority board on Thursday, December 20th Like the Memphis Business Journal....(size: 10.8Kb)
Business Journal
21 Dec 2012
Steve Tapp commented on Arnold Perl unexpectedly retires as chairman of Memphis Airport Authority board on Thursday, December 20th Like the Memphis Business Journal....(size: 10.7Kb)
noodls
21 Dec 2012
(Source. State of Washington). Department of Ecology News Release - December 19, 2012. 12-406 ... The violations occurred between October 2011 and May 2012. The facility, located at 20245 77th Ave ... ### ... Larry Altose, Ecology media relations, 425-649-7009, larry.altose@ecy.wa.gov Lisa >Perle, Ecology compliance inspector, 360-407-7553 Dave Misko, Ecology compliance supervisor, 425-649-7014 Mo Azose, Burlington Environmental, 425-227-6148 ... (noodl....(size: 4.4Kb)
Yahoo Daily News
21 Dec 2012
The 15-hour, 142-lesson course teaches fundamental concepts as users create a PHP website step-by-step. (PRWEB) December 21, 2012 Software training firm InfiniteSkills Inc ... PHP, or PHP Hypertext Preprocessor, is a scripting language designed to produce dynamic web pages ... Course author Doug Bierer has more than 14 years of experience in web development using PHP, Perl, Java and other programming languages ... About InfiniteSkills Inc ... ....(size: 3.7Kb)
Crunch
21 Dec 2012
Apple Facebook Amazon Twitter Google. news. Comment. Koding Raises $7.25 Million More, Matrix PartnersJosh Hannah Joins The Board. Ryan Lawler. View Staff Page Follow me on twitter ... Ryan currently works as a writer for TechCrunch. → Learn More. posted 1 hour ago. Comments ... The startup makes coding easier by providing a cloud-based platform that supports Java, NodeJS, Perl, Python, Ruby, C, C++, Go, and other languages ... Koding....(size: 11.6Kb)
Perl
File:Programming-republic-of-perl.png
Paradigm(s) multi-paradigm: functional, imperative, object-oriented (class-based), reflective, procedural, generic
Appeared in 1987
Designed by Larry Wall
Developer Larry Wall
Stable release 5.16.0[1] (May 20, 2012; 37 days ago  (2012-05-20))
Preview release 5.17.0[2] (May 20, 2012; 37 days ago  (2012-05-20))
Typing discipline Dynamic
Influenced by AWK, Smalltalk 80, Lisp, C, C++, sed, Unix shell, Pascal
Influenced Python, PHP, Ruby, ECMAScript, LPC, Windows PowerShell, JavaScript, Falcon, Perl 6, Qore
Implementation language C
OS Cross-platform
License GNU General Public License or Artistic License[3]
Usual filename extensions .pl .pm .t
Website www.perl.org
Wikibooks logo Perl Programming at Wikibooks

Perl is a high-level, general-purpose, interpreted, dynamic programming language.

Though Perl is not officially an acronym,[4] there are various backronyms in usage, such as: Practical Extraction and Reporting Language.[5] Perl was originally developed by Larry Wall in 1987 as a general-purpose Unix scripting language to make report processing easier.[6] Since then, it has undergone many changes and revisions and become widely popular amongst programmers. Larry Wall continues to oversee development of the core language, and its upcoming version, Perl 6. Perl borrows features from other programming languages including C, shell scripting (sh), AWK, and sed.[7] The language provides powerful text processing facilities without the arbitrary data length limits of many contemporary Unix tools,[8] facilitating easy manipulation of text files. Perl gained widespread popularity in the late 1990s as a CGI scripting language, in part due to its parsing abilities.[9]

In addition to CGI, Perl is used for graphics programming, system administration, network programming, finance, bioinformatics, and other applications. Perl is nicknamed "the Swiss Army chainsaw of scripting languages" because of its flexibility and power.[10] In 1998, it was also referred to as the "duct tape that holds the Internet together", in reference to its ubiquity and perceived inelegance.[11]

Contents

History[link]

Early versions[link]

Larry Wall began work on Perl in 1987, while working as a programmer at Unisys,[8] and released version 1.0 to the comp.sources.misc newsgroup on December 18, 1987.[12] The language expanded rapidly over the next few years.

Perl 2, released in 1988, featured a better regular expression engine. Perl 3, released in 1989, added support for binary data streams.

Originally the only documentation for Perl was a single (increasingly lengthy) man page. In 1991, Programming Perl, known to many Perl programmers as the "Camel Book" because of its cover, was published and became the de facto reference for the language. At the same time, the Perl version number was bumped to 4, not to mark a major change in the language but to identify the version that was documented by the book.

Early Perl 5[link]

Perl 4 went through a series of maintenance releases, culminating in Perl 4.036 in 1993. At that point, Wall abandoned Perl 4 to begin work on Perl 5. Initial design of Perl 5 continued into 1994. The perl5-porters mailing list was established in May 1994 to coordinate work on porting Perl 5 to different platforms. It remains the primary forum for development, maintenance, and porting of Perl 5.[13]

Perl 5.000 was released on October 17, 1994.[14] It was a nearly complete rewrite of the interpreter, and it added many new features to the language, including objects, references, lexical (my) variables, and modules. Importantly, modules provided a mechanism for extending the language without modifying the interpreter. This allowed the core interpreter to stabilize, even as it enabled ordinary Perl programmers to add new language features. Perl 5 has been in active development since then.

Perl 5.001 was released on March 13, 1995. Perl 5.002 was released on February 29, 1996 with the new prototypes feature. This allowed module authors to make subroutines that behaved like Perl builtins. Perl 5.003 was released June 25, 1996, as a security release.

One of the most important events in Perl 5 history took place outside of the language proper and was a consequence of its module support. On October 26, 1995, the Comprehensive Perl Archive Network (CPAN) was established as a repository for Perl modules and Perl itself; as of April 2012, it carries over 24,500 modules by more than 9,500 authors.[15]

Perl 5.004 was released on May 15, 1997, and included among other things the UNIVERSAL package, giving Perl a base object to which all classes were automatically derived and the ability to require versions of modules. Another significant development was the inclusion of the CGI.pm module,[16] which contributed to Perl's popularity as a CGI scripting language.[17]

Perl also now supported running under Microsoft Windows and several other operating systems.[16]

Perl 5.005 was released on July 22, 1998. This release included several enhancements to the regex engine, new hooks into the backend through the B::* modules, the qr// regex quote operator, a large selection of other new core modules, and added support for several more operating systems, including BeOS.[18]

2000–present[link]

Perl 5.6 was released on March 22, 2000. Major changes included 64-bit support, Unicode string representation, large file support (i.e. files over 2 GiB) and the "our" keyword.[19][20] When developing Perl 5.6, the decision was made to switch the versioning scheme to one more similar to other open source projects; after 5.005_63, the next version became 5.5.640, with plans for development versions to have odd numbers and stable versions to have even numbers.

In 2000, Larry Wall put forth a call for suggestions for a new version of Perl from the community. The process resulted in 361 RFC (request for comments) documents which were to be used in guiding development of Perl 6. In 2001,[21] work began on the apocalypses for Perl 6, a series of documents meant to summarize the change requests and present the design of the next generation of Perl. They were presented as a digest of the RFCs, rather than a formal document. At this point, Perl 6 existed only as a description of a language.

Perl 5.8 was first released on July 18, 2002, and had nearly yearly updates since then. The latest version of Perl 5.8 is 5.8.9, released December 14, 2008. Perl 5.8 improved unicode support, added a new IO implementation, added a new thread implementation, improved numeric accuracy, and added several new modules.[22]

In 2004, work began on the Synopses – originally documents that summarized the Apocalypses, but which became the specification for the Perl 6 language. In February 2005, Audrey Tang began work on Pugs, a Perl 6 interpreter written in Haskell.[23] This was the first concerted effort towards making Perl 6 a reality. This effort stalled in 2006.[24]

On December 18, 2007, the 20th anniversary of Perl 1.0, Perl 5.10.0 was released. Perl 5.10.0 included notable new features, which brought it closer to Perl 6. These included a switch statement (called "given"/"when"), regular expressions updates, and the smart match operator, "~~".[25][26] Around this same time, development began in earnest on another implementation of Perl 6 known as Rakudo Perl, developed in tandem with the Parrot virtual machine. As of November 2009, Rakudo Perl has had regular monthly releases and now is the most complete implementation of Perl 6.

A major change in the development process of Perl 5 occurred with Perl 5.11; the development community has switched to a monthly release cycle, with planned release dates three months ahead.

On April 12, 2010, Perl 5.12.0 was released. Notable core enhancements include new package NAME VERSION syntax, the Yada Yada operator (intended to mark placeholder code that is not yet implemented), implicit strictures, full Y2038 compliance, regex conversion overloading, DTrace support, and Unicode 5.2.[27] On January 21, 2011, Perl 5.12.3 was released; it contains updated modules and some documentation changes.[28] Version 5.12.4 was released on June 20, 2011.

On May 14, 2011, Perl 5.14 was released, the latest version of that branch, 5.14.2, being released on September 26, 2011.

On May 20, 2012, Perl 5.16 was released. Notable new features include the ability to specify a given version of perl that one wishes to emulate, allowing users to upgrade their version of perl, but still run old scripts that wold normally be incompatible. [29]. Perl 5.16 also updates the core to support Unicode 6.1. [29]

Name[link]

Perl was originally named "Pearl". Larry Wall wanted to give the language a short name with positive connotations; he claims that he considered (and rejected) every three- and four-letter word in the dictionary. He also considered naming it after his wife Gloria. Wall discovered the existing PEARL programming language before Perl's official release and changed the spelling of the name.[30]

When referring to the language, the name is normally capitalized (Perl) as a proper noun. When referring to the interpreter program itself, the name is often uncapitalized (perl) because most Unix-like file systems are case-sensitive. Before the release of the first edition of Programming Perl, it was common to refer to the language as perl; Randal L. Schwartz, however, capitalized the language's name in the book to make it stand out better when typeset. This case distinction was subsequently documented as canonical.[31]

There is some contention about the all-caps spelling "PERL", which the documentation declares incorrect[31] and which some core community members consider a sign of outsiders.[32] The name is occasionally backronymed as Practical Extraction and Report Language, which appears at the top of the documentation[30] and in some printed literature.[33] Several backronyms have been suggested as equally canonical, including Wall's own humorous Pathologically Eclectic Rubbish Lister.[34] Indeed, Wall claims that the name was intended to inspire many different expansions.[35]

Camel symbol[link]

Programming Perl, published by O'Reilly Media, features a picture of a camel on the cover and is commonly referred to as the "Camel Book".[36] This image of a camel has become an unofficial symbol of Perl as well as a general hacker emblem, appearing on T-shirts and other clothing items.

O'Reilly owns the image as a trademark but licenses it for non-commercial use, requiring only an acknowledgement and a link to www.perl.com. Licensing for commercial use is decided on a case by case basis.[37] O'Reilly also provides "Programming Republic of Perl" logos for non-commercial sites and "Powered by Perl" buttons for any site that uses Perl.[37]

Onion symbol[link]

The Perl Foundation owns an alternative symbol, an onion, which it licenses to its subsidiaries, Perl Mongers, PerlMonks, Perl.org, and others.[38] The symbol is a visual pun on pearl onion.[39]

Overview[link]

Perl is a general-purpose programming language originally developed for text manipulation, but as of 2010 is used for a wide range of tasks including system administration, web development, network programming, games, bioinformatics, and GUI development.

The language is intended to be practical (easy to use, efficient, complete) rather than beautiful (tiny, elegant, minimal).[40] Its major features include support for multiple programming paradigms (procedural, object-oriented, and functional styles), reference counting memory management (without a cycle-detecting garbage collector), built-in support for text processing, and a large collection of third-party modules.

According to Larry Wall, Perl has two slogans. The first is "There's more than one way to do it", commonly known as TMTOWTDI. The second slogan is "Easy things should be easy and hard things should be possible".[8]

Features[link]

The overall structure of Perl derives broadly from C. Perl is procedural in nature, with variables, expressions, assignment statements, brace-delimited blocks, control structures, and subroutines.

Perl also takes features from shell programming. All variables are marked with leading sigils, which unambiguously identify the data type (for example, scalar, array, hash) of the variable in context. Importantly, sigils allow variables to be interpolated directly into strings. Perl has many built-in functions that provide tools often used in shell programming (although many of these tools are implemented by programs external to the shell) such as sorting, and calling on system facilities.

Perl takes lists from Lisp, hashes ("associative arrays") from AWK, and regular expressions from sed. These simplify and facilitate many parsing, text-handling, and data-management tasks.

Perl 5 added features that support complex data structures, first-class functions (that is, closures as values), and an object-oriented programming model. These include references, packages, class-based method dispatch, and lexically scoped variables, along with compiler directives (for example, the strict pragma). A major additional feature introduced with Perl 5 was the ability to package code as reusable modules. Larry Wall later stated that "The whole intent of Perl 5's module system was to encourage the growth of Perl culture rather than the Perl core."[41]

All versions of Perl do automatic data-typing and automatic memory-management. The interpreter knows the type and storage requirements of every data object in the program; it allocates and frees storage for them as necessary using reference counting (so it cannot deallocate circular data structures without manual intervention). Legal type-conversions — for example, conversions from number to string — are done automatically at run time; illegal type conversions are fatal errors.

Design[link]

The design of Perl can be understood as a response to three broad trends in the computer industry: falling hardware costs, rising labor costs, and improvements in compiler technology. Many earlier computer languages, such as Fortran and C, aimed to make efficient use of expensive computer hardware. In contrast, Perl is designed to make efficient use of expensive computer-programmers.

Perl has many features that ease the task of the programmer at the expense of greater CPU and memory requirements. These include automatic memory management; dynamic typing; strings, lists, and hashes; regular expressions; introspection; and an eval() function. Perl follows the theory of "no built-in limits",[36] an idea similar to the Zero One Infinity rule.

Wall was trained as a linguist, and the design of Perl is very much informed by linguistic principles. Examples include Huffman coding (common constructions should be short), good end-weighting (the important information should come first), and a large collection of language primitives. Perl favors language constructs that are concise and natural for humans to write, even where they complicate the Perl interpreter.

Perl syntax reflects the idea that "things that are different should look different."[42] For example, scalars, arrays, and hashes have different leading sigils. Array indices and hash keys use different kinds of braces. Strings and regular expressions have different standard delimiters. This approach can be contrasted with languages such as Lisp, where the same S-expression construct and basic syntax are used for many different purposes.

Perl does not enforce any particular programming paradigm (procedural, object-oriented, functional, or others) or even require the programmer to choose among them.

There is a broad practical bent to both the Perl language and the community and culture that surround it. The preface to Programming Perl begins: "Perl is a language for getting your job done."[8] One consequence of this is that Perl is not a tidy language. It includes many features, tolerates exceptions to its rules, and employs heuristics to resolve syntactical ambiguities. Because of the forgiving nature of the compiler, bugs can sometimes be hard to find. Perl's function documentation remarks on the variant behavior of built-in functions in list and scalar contexts that "In general, they do what you want, unless you want consistency."[43]

No written specification or standard for the Perl language exists for Perl versions through Perl 5, and there are no plans to create one for the current version of Perl. There has been only one implementation of the interpreter, and the language has evolved along with it. That interpreter, together with its functional tests, stands as a de facto specification of the language. Perl 6, however, started with a specification,[44] and several projects[45] aim to implement some or all of the specification.

Applications[link]

Perl has many and varied applications, compounded by the availability of many standard and third-party modules.

Ever since the early days of the Web, programmers have used Perl to write CGI scripts. Perl is known as one of "the three Ps" (along with Python and PHP), the most popular dynamic languages for writing Web applications. It is also an integral component of the popular LAMP solution stack for web development. Large projects written in Perl include cPanel, Slash, Bugzilla, RT, TWiki, and Movable Type. Many high-traffic websites use Perl extensively. Examples include Amazon.com, bbc.co.uk, Priceline.com, Craigslist,[46] IMDb,[47] LiveJournal, Slashdot and Ticketmaster.

Perl is often used as a glue language, tying together systems and interfaces that were not specifically designed to interoperate, and for "data munging",[48] that is, converting or processing large amounts of data for tasks such as creating reports. In fact, these strengths are intimately linked. The combination makes Perl a popular all-purpose language for system administrators, particularly because short programs can be entered and run on a single command line.

With a degree of care, Perl code can be made portable across Windows and Unix. Portable Perl code is often used by suppliers of software (both COTS and bespoke) to simplify packaging and maintenance of software build- and deployment-scripts.

Graphical user interfaces (GUIs) may be developed using Perl. For example, Perl/Tk is commonly used to enable user interaction with Perl scripts. Such interaction may be synchronous or asynchronous, using callbacks to update the GUI. For more information about the technologies involved, see Tk, Tcl and WxPerl.

Perl is also widely used in finance and in bioinformatics, where it is valued for rapid application development and deployment and for its capability to handle large data-sets.

Implementation[link]

Perl is implemented as a core interpreter, written in C, together with a large collection of modules, written in Perl and C. As of 2010, the stable version (5.12.3) is 14.2 MB when packaged in a tar file and gzip compressed.[49] The interpreter is 150,000 lines of C code and compiles to a 1 MB executable on typical machine architectures. Alternatively, the interpreter can be compiled to a link library and embedded in other programs. There are nearly 500 modules in the distribution, comprising 200,000 lines of Perl and an additional 350,000 lines of C code. (Much of the C code in the modules consists of character-encoding tables.)

The interpreter has an object-oriented architecture. All of the elements of the Perl language—scalars, arrays, hashes, coderefs, filehandles—are represented in the interpreter by C structs. Operations on these structs are defined by a large collection of macros, typedefs, and functions; these constitute the Perl C API. The Perl API can be bewildering to the uninitiated, but its entry points follow a consistent naming-scheme, which provides guidance to those who use it.

The life of a Perl interpreter divides broadly into a compile phase and a run phase.[50] In Perl, the phases are the major stages in the interpreter's life-cycle. Each interpreter goes through each phase only once, and the phases follow in a fixed sequence.

Most of what happens in Perl's compile phase is compilation, and most of what happens in Perl's run phase is execution, but there are significant exceptions. Perl makes important use of its capability to execute Perl code during the compile phase. Perl will also delay compilation into the run phase. The terms that indicate the kind of processing that is actually occurring at any moment are compile time and run time. Perl is in compile time at most points during the compile phase, but compile time may also be entered during the run phase. The compile time for code in a string argument passed to the eval built-in occurs during the run phase. Perl is often in run time during the compile phase and spends most of the run phase in run time. Code in BEGIN blocks executes at run time but in the compile phase.

At compile time, the interpreter parses Perl code into a syntax tree. At run time, it executes the program by walking the tree. Text is parsed only once, and the syntax tree is subject to optimization before it is executed, so that execution is relatively efficient. Compile-time optimizations on the syntax tree include constant folding and context propagation, but peephole optimization is also performed.

Perl has a Turing-complete grammar because parsing can be affected by run-time code executed during the compile phase.[51] Therefore, Perl cannot be parsed by a straight Lex/Yacc lexer/parser combination. Instead, the interpreter implements its own lexer, which coordinates with a modified GNU bison parser to resolve ambiguities in the language.

It is often said that "Only perl can parse Perl",[52] meaning that only the Perl interpreter (perl) can parse the Perl language (Perl), but even this is not, in general, true. Because the Perl interpreter can simulate a Turing machine during its compile phase, it would need to decide the Halting Problem in order to complete parsing in every case. It's a long-standing result that the Halting Problem is undecidable, and therefore not even perl can always parse Perl. Perl makes the unusual choice of giving the user access to its full programming power in its own compile phase. The cost in terms of theoretical purity is high, but practical inconvenience seems to be rare.

Other programs that undertake to parse Perl, such as source-code analyzers and auto-indenters, have to contend not only with ambiguous syntactic constructs but also with the undecidability of Perl parsing in the general case. Adam Kennedy's PPI project focused on parsing Perl code as a document (retaining its integrity as a document), instead of parsing Perl as executable code (which not even Perl itself can always do). It was Kennedy who first conjectured that "parsing Perl suffers from the 'Halting Problem'",[53] which was later proved.[54]

Perl is distributed with some 120,000 functional tests. These run as part of the normal build process and extensively exercise the interpreter and its core modules. Perl developers rely on the functional tests to ensure that changes to the interpreter do not introduce bugs; additionally, Perl users who see that the interpreter passes its functional tests on their system can have a high degree of confidence that it is working properly.

Maintenance of the Perl interpreter has become increasingly difficult over the years. The code base has undergone continuous development since 1994. The code has been optimized for performance at the expense of simplicity, clarity, and strong internal interfaces. New features have been added, yet virtually complete backward compatibility with earlier versions is maintained. Major releases of Perl were coordinated by Perl pumpkings,[55] which handled integrating patch submissions and bug fixes, but the language has since changed to a rotating, monthly release cycle. Development discussion takes place via the perl5_porters mailing list. As of Perl 5.11, development efforts have included refactoring certain core modules known as 'dual lifed' modules out of the Perl core[56] to help alleviate some of these problems.

Availability[link]

Perl is dual licensed under both the Artistic License and the GNU General Public License. Distributions are available for most operating systems. It is particularly prevalent on Unix and Unix-like systems, but it has been ported to most modern (and many obsolete) platforms. With only six reported exceptions, Perl can be compiled from source code on all POSIX-compliant, or otherwise-Unix-compatible platforms.[57]

Because of unusual changes required for the Mac OS Classic environment, a special port called MacPerl was shipped independently.[58]

The Comprehensive Perl Archive Network carries a complete list of supported platforms with links to the distributions available on each.[59] CPAN is also the source for publicly available Perl modules that are not part of the core Perl distribution.

Windows[link]

Users of Microsoft Windows typically install one of the native binary distributions of Perl for Win32, most commonly Strawberry Perl or ActivePerl. Compiling Perl from source code under Windows is possible, but most installations lack the requisite C compiler and build tools. This also makes it difficult to install modules from the CPAN, particularly those that are partially written in C.

ActivePerl is a closed source distribution from ActiveState that has regular releases that track the core Perl releases.[60] The distribution also includes the Perl package manager (PPM),[61] a popular tool for installing, removing, upgrading, and managing the use of common Perl modules.

Strawberry Perl is an open source distribution for Windows. It has had regular, quarterly releases since January 2008, including new modules as feedback and requests come in. Strawberry Perl aims to be able to install modules like standard Perl distributions on other platforms, including compiling XS modules.

The Cygwin emulation layer is another way of running Perl under Windows. Cygwin provides a Unix-like environment on Windows, and both Perl and CPAN are available as standard pre-compiled packages in the Cygwin setup program. Because Cygwin also includes the gcc, compiling Perl from source is also possible.

Database interfaces[link]

Perl is widely favored for database applications. Its text-handling facilities are useful for generating SQL queries; arrays, hashes, and automatic memory management make it easy to collect and process the returned data. For example, in Tim Bunce's DBI application programming interface (API), the arguments to the API can be the text of SQL queries; thus it is possible to program in multiple languages at the same time (e.g., for generating a web page using HTML, JavaScript, and SQL in a here document). The use of Perl variable interpolation to programmatically customize each of the SQL queries, and the specification of Perl arrays or hashes as the structures to programmatically hold the resulting data sets from each SQL query, allows a high-level mechanism for handling large amounts of data for post-processing by a Perl subprogram.[62] In early versions of Perl, database interfaces were created by relinking the interpreter with a client-side database library. This was sufficiently difficult that it was done for only a few of the most-important and most widely used databases, and it restricted the resulting perl executable to using just one database interface at a time.

In Perl 5, database interfaces are implemented by Perl DBI modules. The DBI (Database Interface) module presents a single, database-independent interface to Perl applications, while the DBD (Database Driver) modules handle the details of accessing some 50 different databases; there are DBD drivers for most ANSI SQL databases.

DBI provides caching for database handles and queries, which can greatly improve performance in long-lived execution environments such as mod_perl,[63] helping high-volume systems avert load spikes as in the Slashdot effect.

In modern Perl applications, especially those written using Web application frameworks such as Catalyst, the DBI module is often used indirectly via object-relational mappers such as DBIx::Class, Class::DBI or Rose::DB::Object which generate SQL queries and handle data transparently to the application author.

Comparative performance[link]

The Computer Language Benchmarks Game, a project hosted by Alioth, compares the performance of implementations of typical programming problems in several programming languages.[64] The submitted Perl implementations typically perform toward the high end of the memory-usage spectrum and give varied speed results. Perl's performance in the benchmarks game is typical for interpreted languages.[65]

Large Perl programs start more slowly than similar programs in compiled languages because perl has to compile the source every time it runs. In a talk at the YAPC::Europe 2005 conference and subsequent article "A Timely Start", Jean-Louis Leroy found that his Perl programs took much longer to run than he expected because the perl interpreter spent much of the time finding modules because of his over-large include path.[66] Unlike Java, Python, and Ruby, Perl has only experimental support for pre-compiling.[67] Therefore Perl programs pay this overhead penalty on every execution. The run phase of typical programs is long enough that amortized startup time is not substantial, but benchmarks that measure very short execution times are likely to be skewed due to this overhead.

A number of tools have been introduced to improve this situation. The first such tool was Apache's mod_perl, which sought to address one of the most-common reasons that small Perl programs were invoked rapidly: CGI Web development. ActivePerl, via Microsoft ISAPI, provides similar performance improvements.

Once Perl code is compiled, there is additional overhead during the execution phase that typically isn't present for programs written in compiled languages such as C or C++. Examples of such overhead include bytecode interpretation, reference-counting memory management, and dynamic type-checking.

Optimizing[link]

Like any code, Perl programs can be tuned for performance using benchmarks and profiles after a readable and correct implementation is finished. In part because of Perl's interpreted nature, writing more-efficient Perl will not always be enough to meet one's performance goals for a program.

In such situations, the most-critical routines of a Perl program can be written in other languages such as C or Assembler, which can be connected to Perl via simple Inline modules or the more-complex-but-flexible XS mechanism.[68] Nicholas Clark, a Perl core developer, discusses some Perl design trade-offs and solutions in a 2002 document called "When perl is not quite fast enough".[69]

Perl 6[link]

Camelia, the logo for the Perl 6 project.[70]

At the 2000 Perl Conference, Jon Orwant made a case for a major new language initiative.[71] This led to a decision to begin work on a redesign of the language, to be called Perl 6. Proposals for new language features were solicited from the Perl community at large, and more than 300 RFCs were submitted.

Larry Wall spent the next few years digesting the RFCs and synthesizing them into a coherent framework for Perl 6. He has presented his design for Perl 6 in a series of documents called "apocalypses", which are numbered to correspond to chapters in Programming Perl. As of January 2011, the developing specification of Perl 6 is encapsulated in design documents called Synopses, which are numbered to correspond to Apocalypses.[72]

Perl 6 is not intended to be backward compatible, although there will be a compatibility mode. Perl 6 and Perl 5 are distinct languages with a common ancestry.[73]

Thesis work by Bradley M. Kuhn, overseen by Larry Wall, considered the possible use of the Java virtual machine as a runtime for Perl.[74] Kuhn's thesis showed this approach to be problematic. In 2001, it was decided that Perl 6 would run on a cross-language virtual machine called Parrot. This will mean that other languages targeting the Parrot will gain native access to CPAN, allowing some level of cross-language development.

In 2005, Audrey Tang created the pugs project, an implementation of Perl 6 in Haskell. This was, and continues to act as, a test platform for the Perl 6 language (separate from the development of the actual implementation) allowing the language designers to explore. The pugs project spawned an active Perl/Haskell cross-language community centered around the freenode #perl6 IRC channel.

A number of features in the Perl 6 language now show similarities to Haskell.[citation needed]

As of 2012, Perl 6 development is primarily centered around two compilers[75], Rakudo Perl 6, an implementation running on top of the Parrot virtual machine, and Niecza, which targets the Common Language Runtime.

Future of Perl 5[link]

Development of Perl 5 is also continuing. Perl 5.12.0 was released in April 2010 with some new features influenced by the design of Perl 6.[27][76] Perl 5.14.1 was released on June 17, 2011. Perl 5 development versions are released on a monthly basis, with major releases coming out once per year.[77]

Future plans for Perl 5 include making the core language easier to extend from modules, and providing a small, extensible Meta-object protocol in core.[78]

The relative proportion of searches for 'Perl programming', as compared with similar searches for other programming languages, declined from 2005 to early 2011 (with a subsequent increase since then).[79] However, according to this same source, Perl has been one of the top ten most popular programming languages since records began in 2001.[80]

Perl community[link]

Perl's culture and community has developed alongside the language itself. Usenet was the first public venue in which Perl was introduced, but over the course of its evolution, Perl's community was shaped by the growth of broadening Internet-based services including the introduction of the World Wide Web. The community that surrounds Perl was, in fact, the topic of Larry Wall's first "State of the Onion" talk.[81]

State of the Onion[link]

State of the Onion is the name for Larry Wall’s yearly keynote-style summaries on the progress of Perl and its community. They are characterized by his hallmark humor, employing references to Perl’s culture, the wider hacker culture, Wall’s linguistic background, sometimes his family life, and occasionally even his Christian background.

Each talk is first given at various Perl conferences and is eventually also published online.

Perl pastimes[link]

JAPHs
In email, Usenet, and message board postings, "Just another Perl hacker" (JAPH) programs are a common trend, originated by Randal L. Schwartz, one of the earliest professional Perl trainers.[82] In the parlance of Perl culture, Perl programmers are known as Perl hackers, and from this derives the practice of writing short programs to print out the phrase "Just another Perl hacker,". In the spirit of the original concept, these programs are moderately obfuscated and short enough to fit into the signature of an email or Usenet message. The "canonical" JAPH as developed by Schwartz includes the comma at the end, although this is often omitted.[83]
Perl golf
Perl "golf" is the pastime of reducing the number of characters (key "strokes") used in a Perl program to the bare minimum, much as how golf players seek to take as few shots as possible in a round. The phrase's first use [84] emphasized the difference between pedestrian code meant to teach a newcomer and terse hacks likely to amuse experienced Perl programmers, an example of the latter being JAPHs that were already used in signatures in Usenet postings and elsewhere. Similar stunts had been an unnamed pastime in the language APL in previous decades. The use of Perl to write a program that performed RSA encryption prompted a widespread and practical interest in this pastime.[85] In subsequent years, the term "code golf" has been applied to the pastime in other languages.[86] A Perl Golf Apocalypse was held at Perl Conference 4.0 in Monterey, California in July 2000.
Obfuscation
As with C, obfuscated code competitions were a well known pastime in the late 1990s. The Obfuscated Perl Contest was a competition held by The Perl Journal from 1996 to 2000 that made an arch virtue of Perl's syntactic flexibility. Awards were given for categories such as "most powerful"—programs that made efficient use of space—and "best four-line signature" for programs that fit into four lines of 76 characters in the style of a Usenet signature block.[87]
Poetry
Perl poetry is the practice of writing poems that can be compiled as legal Perl code, for example the piece known as Black Perl. This hobby is made possible by the large number of English words that are used in the Perl. New poems are regularly submitted to the community at PerlMonks.[88]

Perl on IRC[link]

There are a number of IRC channels that offer support for the language and some modules.

IRC Network Channels
irc.freenode.net #perl #perl6 #cbstream #perlcafe #poe
irc.perl.org #moose #poe #catalyst #dbix-class #perl-help #distzilla #epo #corehackers #sdl #win32 #toolchain #padre
irc.slashnet.org #perlmonks
irc.oftc.net #perl
irc.efnet.net #perlhelp
irc.rizon.net #perl
irc.debian.org #debian-perl

CPAN Acme[link]

There are also many examples of code written purely for entertainment on the CPAN. Lingua::Romana::Perligata, for example, allows writing programs in Latin.[89] Upon execution of such a program, the module translates its source code into regular Perl and runs it.

The Perl community has set aside the "Acme" namespace for modules that are fun in nature (but its scope has widened to include exploratory or experimental code or any other module that is not meant to ever be used in production). Some of the Acme modules are deliberately implemented in amusing ways. This includes Acme::Bleach, one of the first modules in the Acme:: namespace,[90] which allows the program's source code to be "whitened" (i.e., all characters replaced with whitespace) and yet still work.

See also[link]

References[link]

  1. ^ "Perl 5.16.0 is now available". perl.org. http://www.nntp.perl.org/group/perl.perl5.porters/2012/05/msg186903.html. Retrieved 2012-05-21. 
  2. ^ "Perl 5.17.0 is now available (to work on)". perl.org. http://www.nntp.perl.org/group/perl.perl5.porters/2012/05/msg186908.html. Retrieved 2012-05-21. 
  3. ^ "Perl Licensing". dev.perl.org. http://dev.perl.org/licenses. Retrieved 2011-01-08. 
  4. ^ Lapworth, Leo. "General Questions About Perl". Perl FAQ. Perl.org. http://learn.perl.org/faq/perlfaq1.html#Whats-the-difference-between-perl-and-Perl-. Retrieved 24 February 2012. 
  5. ^ Perl Tutorial.org. "Introducing to Perl". Perl Tutorial. http://www.perltutorial.org/introducing-to-perl.aspx. Retrieved 24 February 2012. 
  6. ^ Sheppard, Doug (2000-10-16). "Beginner's Introduction to Perl". dev.perl.org. http://www.perl.com/pub/2000/10/begperl1.html. Retrieved 2011-01-08. 
  7. ^ Ashton, Elaine (1999). "The Timeline of Perl and its Culture (v3.0_0505)". http://history.perl.org/PerlTimeline.html. 
  8. ^ a b c d Wall, Larry, Tom Christiansen and Jon Orwant (July 2000). Programming Perl, Third Edition. O'Reilly Media. ISBN 0-596-00027-8. 
  9. ^ Smith, Roderick W. (21 Jun 2002). Advanced Linux Networking. Addison-Wesley Professional. p. 594. ISBN 978-0-201-77423-8. 
  10. ^ Sheppard, Doug (2000-10-16). "Beginner's Introduction to Perl". O'Reilly Media. http://www.perl.com/pub/a/2000/10/begperl1.html. Retrieved 2008-07-27. 
  11. ^ Leonard, Andrew. "The joy of Perl". Salon.com. http://www.salon.com/21st/feature/1998/10/cov_13feature.html. Retrieved 2011-01-08. [dead link]
  12. ^ "comp.sources.unix". Google Groups. Google. 1988-02-01. http://groups.google.com/group/comp.sources.unix/tree/browse_frm/month/1988-02?_done=%2Fgroup%2Fcomp.sources.unix%2Fbrowse_frm%2Fmonth%2F1988-02%3F&. Retrieved 2011-01-13. 
  13. ^ "perl.perl5.porters archive". perl.org. http://www.nntp.perl.org/group/perl.perl5.porters/. Retrieved 2011-01-13. 
  14. ^ "perlhist - the Perl history records". Perl 5 version 12.2 documentation. perldoc.perl.org. http://perldoc.perl.org/perlhist.html. Retrieved 2011-01-21. 
  15. ^ "CPAN". CPAN. http://www.cpan.org/. Retrieved 2012-04-14. 
  16. ^ a b "perl5004delta - what's new for perl5.004". Perl 5 version 12.2 documentation. perldoc.perl.org. http://perldoc.perl.org/perl5004delta.html. Retrieved 2011-01-08. 
  17. ^ Patwardhan, Nathan; Siever, Ellen; Spainhour, Stephen (2002). Perl in a Nutshell, Second Edition. O'Reilly Media. ISBN 978-0-596-00241-1. 
  18. ^ "perl5005delta - what's new for perl5.005". Perl 5 version 12.2 documentation. perldoc.perl.org. http://perldoc.perl.org/perl5005delta.html. Retrieved 2011-01-21. 
  19. ^ "perl56delta - what's new for perl v5.6.0". Perl 5 version 12.2 documentation. perldoc.perl.org. http://perldoc.perl.org/perl56delta.html. Retrieved 2011-01-21. 
  20. ^ "perl56delta - what's new for perl v5.6.x". Perl 5 version 12.2 documentation. perldoc.perl.org. http://perldoc.perl.org/perl561delta.html. Retrieved 2011-01-21. 
  21. ^ Wall, Larry. "Apocalypse 1: The Ugly, the Bad, and the Good". http://dev.perl.org/perl6/doc/design/apo/A01.html. Retrieved 2011-01-08. 
  22. ^ "perl58delta - what is new for perl v5.8.0". Perl 5 version 12.2 documentation. perldoc.perl.org. http://perldoc.perl.org/perl58delta.html. Retrieved 2011-01-21. 
  23. ^ "A Plan for Pugs". O'Reilly Media. 2005-03-03. http://www.perl.com/pub/a/2005/03/03/pugs_interview.html. Retrieved 2011-01-27. 
  24. ^ Tang, Audrey (2010-04-21). "Re: How to Implement Perl 6 in Ten Years". PerlMonks. http://www.perlmonks.org/?node_id=835936. Retrieved 2011-01-03. 
  25. ^ "perl5100delta - what is new for perl 5.10.0". Perl 5 version 12.2 documentation. perldoc.perl.org. http://perldoc.perl.org/perl5100delta.html. Retrieved 2011-01-08. 
  26. ^ "perlsyn - Perl syntax". Perl 5 version 12.2 documentation. perldoc.perl.org. http://perldoc.perl.org/perlsyn.html#Smart-matching-in-detail. Retrieved 2011-01-21. 
  27. ^ a b "perl5120delta - what is new for perl v5.12.0". Perl 5 version 12.2 documentation. perldoc.perl.org. http://perldoc.perl.org/perl5120delta.html. Retrieved 2011-01-08. 
  28. ^ "perldelta - what is new for perl v5.12.3". Perl 5 version 12.2 documentation. perldoc.perl.org. http://perldoc.perl.org/perl5123delta.html. Retrieved 2011-01-08. 
  29. ^ a b "perldelta - what is new for perl v5.16.0". Perl 5 version 16.0 documentation. search.cpan.org. http://search.cpan.org/~rjbs/perl-5.16.0/pod/perldelta.pod. Retrieved 2012-05-21. 
  30. ^ a b Richardson, Marjorie (1999-05-01). "Larry Wall, the Guru of Perl". Linux Journal. http://www.linuxjournal.com/article/3394. Retrieved 2011-01-03. 
  31. ^ a b "perlfaq1: What's the difference between "perl" and "Perl"?". perldoc.perl.org - Perl 5 version 12.2 documentation. http://perldoc.perl.org/perlfaq1.html#What's-the-difference-between-%22perl%22-and-%22Perl%22%3f. 
  32. ^ Schwartz, Randal. "PERL as shibboleth and the Perl community". PerlMonks. http://www.perlmonks.org/index.pl?node_id=510594. Retrieved 2007-06-01. 
  33. ^ Steve McConnell (2004) Code Complete, 2nd ed., Microsoft Press, p. 65.
  34. ^ Wall, Larry. "perl - The Perl language interpreter". Perl 5 version 12.2 documentation. http://perldoc.perl.org/perl.html#BUGS. Retrieved 2011-01-26. 
  35. ^ Wall, Larry. "Re^7: PERL as shibboleth and the Perl community". PerlMonks. http://www.perlmonks.org/index.pl?node_id=511722. Retrieved 2011-01-02. 
  36. ^ a b Schwartz, Randal L; Phoenix, Tom; foy, brian. Learning Perl, Third Edition. ISBN 978-0-596-00132-2. 
  37. ^ a b "The Perl Camel Usage and Trademark Information". O'Reilly Media. http://onlamp.com/pub/a/oreilly/perl/usage/. Retrieved 2011-01-09. 
  38. ^ "Perl Trademark". The Perl Foundation. http://www.perlfoundation.org/perl_trademark. Retrieved 2011-01-09. 
  39. ^ Gillmore, Dan (1998-10-25). "Republic Of Perl". Chicago Tribune. http://articles.chicagotribune.com/1998-10-25/news/9810250094_1_programmers-open-source-movement-programming-community. Retrieved 2011-01-10. 
  40. ^ Kirrily, Robert. "perlintro -- a brief introduction and overview of Perl". Perl 5 version 12.2 documentation. perldoc.perl.org. http://perldoc.perl.org/perlintro.html. Retrieved 2011-01-10. 
  41. ^ Usenet post, May 10, 1997, with ID 199705101952.MAA00756@wall.org
  42. ^ Wall, Larry (1997-03-01). "Wherefore Art, Thou?". Linux Journal. http://www.linuxjournal.com/article/2070. Retrieved 2011-03-13. 
  43. ^ "perlfunc - Perl builtin functions". Perl 5 version 12.2 documentation. perldoc.perl.org. http://perldoc.perl.org/perlfunc.html. Retrieved 2011-01-10. 
  44. ^ "Perl 6 Specification". The Perl 6 Project. http://www.perl6.org/specification. Retrieved 2011-01-27. 
  45. ^ "Perl 6 Compilers". The Perl 6 Project. http://www.perl6.org/compilers/. Retrieved 2011-01-27. 
  46. ^ Gilmore, W. J.. Beginning PHP and MySQL: From Novice to Professional, Fourth Edition. Apress. p. 484. ISBN 978-1-4302-3114-1. 
  47. ^ "IMDb Helpdesk: What software/hardware are you using to run the site?". Internet Movie Database. http://www.imdb.com/help/search?domain=helpdesk_faq&index=1&file=techinfo. Retrieved 2011-02-12. 
  48. ^ "Perl Books - Book: Data Munging with Perl". Perl.org. http://books.perl.org/book/95. Retrieved December 30, 2010. 
  49. ^ "Perl Source Code". CPAN. http://www.cpan.org/src. Retrieved 2011-01-27. 
  50. ^ A description of the Perl 5 interpreter can be found in Programming Perl, 3rd Ed., chapter 18. See particularly page 467, which carefully distinguishes run phase and compile phase from run time and compile time. Perl "time" and "phase" are often confused.
  51. ^ Schwartz, Randal. "On Parsing Perl". http://www.perlmonks.org/index.pl?node_id=44722. Retrieved 2007-01-03. 
  52. ^ "The Perl Journal #19/9.26". O'Reilly Media. ftp://ftp.ora.com/pub/labs/tpj/tpj2.pdf. Retrieved 2011-02-04. 
  53. ^ Kennedy, Adam (2006). "PPI—Parse, Analyze and Manipulate Perl (without perl)". CPAN. http://search.cpan.org/~adamk/PPI-1.215/lib/PPI.pm. 
  54. ^ "Rice's Theorem". The Perl Review 4 (3): 23–29. Summer 2008.  and "Perl is Undecidable". The Perl Review 5 (0): 7–11. Fall 2008. , available online at Kegler, Jeffrey. "Perl and Undecidability". http://www.jeffreykegler.com/Home/perl-and-undecidability. 
  55. ^ http://www.perlfoundation.org/perl5/index.cgi?pumpking
  56. ^ "perl5110delta - what is new for perl v5.11.0". Perl 5 version 12.2 documentation. perldoc.perl.org. http://perldoc.perl.org/perl5110delta.html. Retrieved 2011-01-08. 
  57. ^ Hietaniemi, Jarkko (1998). "Perl Ports (Binary Distributions)". CPAN.org. http://www.cpan.org/ports/. 
  58. ^ "The MacPerl Pages". Prime Time Freeware. 1997. http://www.macperl.com/. 
  59. ^ "Perl Ports (Binary Distributions)". CPAN. http://www.cpan.org/ports/. Retrieved 2011-01-27. 
  60. ^ "ActivePerl is Perl for Windows, Mac, Linux, AIX, HP-UX & Solaris". ActiveState Software. http://www.activestate.com/activeperl. Retrieved 2011-01-09. 
  61. ^ "Using PPM". ActiveState Software. http://docs.activestate.com/activeperl/5.12/faq/ActivePerl-faq2.html. Retrieved 2011-01-09. 
  62. ^ Alligator Descartes and Tim Bunce (2000), Programming the Perl DBI. O'Reilly ISBN 1-56592-699-4
  63. ^ Bekman, Stas. "Efficient Work with Databases under mod_perl". http://perl.apache.org/docs/1.0/guide/performance.html#Efficient_Work_with_Databases_under_mod_perl. Retrieved 2007-09-01. 
  64. ^ "Alioth: The Computer Language Benchmarks Game: Project Info". Alioth. http://alioth.debian.org/projects/shootout/. Retrieved 2011-01-13. 
  65. ^ Boxplot Summary "Which programming languages are fastest?". Computer Language Benchmarks Game. Alioth. http://shootout.alioth.debian.org/u32/benchmark.php?test=all〈=all&d=data&v8=on&lua=on&python=on&php=on&perl=on&yarv=on Boxplot Summary. Retrieved 2011-01-13. 
  66. ^ Leroy, Jean-Louis (2005-12-01). "A Timely Start". O'Reilly. http://www.perl.com/pub/a/2005/12/21/a_timely_start.html. 
  67. ^ Beattie, Malcolm and Enache Adrian (2003). "B::Bytecode Perl compiler's bytecode backend". CPAN. http://search.cpan.org/~nwclark/perl-5.8.8/ext/B/B/Bytecode.pm#KNOWN_BUGS. 
  68. ^ Ingerson, Brian. "Inline - search.cpan.org". CPAN. http://search.cpan.org/~sisyphus/Inline-0.47/Inline.pod. Retrieved 2011-01-26. [dead link]
  69. ^ Clark, Nicholas. "When perl is not quite fast enough". http://www.ccl4.org/~nick/P/Fast_Enough/. Retrieved 2011-01-02. 
  70. ^ "Perl 6". The Perl 6 Project. http://perl6.org/. Retrieved 2011-02-27. 
  71. ^ Torkington, Nathan. "Transcription of Larry's talk". nntp.perl.org. http://www.nntp.perl.org/group/perl.perl6.meta/2000/10/msg424.html. Retrieved 2011-01-25. 
  72. ^ "Official Perl 6 Documentation". The Perl 6 Project. http://perlcabal.org/syn/. Retrieved 2011-01-25. 
  73. ^ "Perl 6 - dev.perl.org". dev.perl.org. http://dev.perl.org/perl6/. Retrieved 2011-01-25. 
  74. ^ Kuhn, Bradley (January 2001). Considerations on Porting Perl to the Java Virtual Machine. University of Cincinnati. http://www.ebb.org/bkuhn/writings/technical/thesis/. Retrieved 2008-06-28. 
  75. ^ "Feature comparison of Perl 6 compilers". http://perl6.org/compilers/features. 
  76. ^ "Perl 5.12.0 released - Update". Heise Media UK. 2010-04-13. http://www.h-online.com/open/news/item/Perl-5-12-0-released-Update-976919.html. Retrieved 2011-01-08. 
  77. ^ "The unstoppable Perl release train?". LWN.net. 2012-02-29. http://lwn.net/Articles/484297/. Retrieved 2012-03-28. 
  78. ^ "Perl 5.16 and beyond". 2012-03-12. http://lwn.net/SubscriberLink/487216/8491ce8b050bfd59/. 
  79. ^ TIOBE Software Index (2012). "TIOBE Programming Community Index Perl". http://www.tiobe.com/index.php/paperinfo/tpci/Perl.html. Retrieved 2012-04-27. 
  80. ^ TIOBE Software Index (2012). "TIOBE Programming Community Index Perl". http://www.tiobe.com/index.php/paperinfo/tpci/Perl.html. Retrieved 2012-04-30. 
  81. ^ Wall, Larry (1997-08-20). "Perl Culture (AKA the first State of the Onion)". http://www.wall.org/~larry/keynote/keynote.html. 
  82. ^ Randal L. Schwartz (1999-05-02). "Who is Just another Perl hacker?". comp.lang.perl.misc. (Web link). Retrieved 2007-11-12. 
  83. ^ Schwartz, Randal (2005-03-31). "Canonical JAPH". PerlMonks. http://www.perlmonks.org/bare/?node_id=443856. Retrieved 2011-05-16. 
  84. ^ Greg Bacon (1999-05-28). "Re: Incrementing a value in a slice". comp.lang.perl.misc. (Web link). Retrieved 2011-07-12. 
  85. ^ Back, Adam. "RSA in 5 lines of perl". http://www.cypherspace.org/rsa/pureperl.html. Retrieved 2011-01-10. 
  86. ^ "Code Golf: What is Code Golf?". 29degrees. 2007. http://codegolf.com/. 
  87. ^ Gallo, Felix (2003). [oreilly.com/catalog/tpj3/chapter/ch43.pdf "The Zeroth Obfuscated Perl Contest"]. In Jon Orwant. Games, diversions, and Perl culture: best of the Perl journal. O'Reilly Media. oreilly.com/catalog/tpj3/chapter/ch43.pdf. Retrieved 2011-01-12. 
  88. ^ "Perl Poetry". PerlMonks. http://www.perlmonks.org/?node_id=1590. Retrieved 2011-01-27. 
  89. ^ Conway, Damian. "Lingua::Romana::Perligata -- Perl for the XXI-imum Century". http://www.csse.monash.edu.au/~damian/papers/HTML/Perligata.html. 
  90. ^ Brocard, Leon (2001-05-23). "use Perl; Journal of acme". use Perl. http://use.perl.org/~acme/journal/200. 

Further reading[link]

External links[link]

http://wn.com/Perl

Related pages:

http://cs.wn.com/Perl

http://es.wn.com/Perl

http://ru.wn.com/Perl

http://id.wn.com/Perl

http://it.wn.com/Perl

http://pl.wn.com/Perl

http://fr.wn.com/Perl (langage)

http://de.wn.com/Perl (Programmiersprache)

http://hi.wn.com/पर्ल

http://pt.wn.com/Perl

http://nl.wn.com/Perl (programmeertaal)




This page contains text from Wikipedia, the Free Encyclopedia - http://en.wikipedia.org/wiki/Perl

This article is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License, which means that you can copy and modify it as long as the entire work (including additions) remains under this license.