Perl language features and functions

http://ru.wikipedia.org/wiki/Perl

For me, this is a very convenient and simple language. My favorite )))

Currently widely used for processing large amounts of textual information, which is why it was created. This determines the scope of its popularity. Among other things, it includes such a serious science as bioinformatics - the science of analyzing sequences of nucleic acids and peptides.

Perl is a “powerful, flexible, secure, and modern” high-level language that is used in a wide variety of areas, from parsing textual information to developing graphics and multimedia applications.

It copes with the processing of various types of data, so it is often used when writing various types of parsers and bots. Can be used for system administration tasks.

One of the modern "niches" for the Perl language is web development. It is written a lot of web frameworks - both microformov , and full-featured MVC-frameworks . Many companies develop their Perl engines — domain name recorders and hosting providers, search engines, SEO companies, media companies, online game developers, etc.

In recent years, Perl is experiencing its "renaissance", a kind of rebirth - a lot has been finalized both in the language itself (for example, the most complete Unicode support of all languages ​​appeared) and in third-party modules: frameworks for effective object-oriented writing are written development , asynchronous programming , convenient ORM , and much, much more. As one Perl blog commentator put it recently: "This is not your Daddy's Perl" - "This is not the Perl your daddy was programming on" :) This is Modern Perl .

Perl has a rather active community that supports and develops it. Every year dozens of YAPC (Yet Another Perl Conference) conferences, workshops and technical, as well as non-technical meetings dedicated to Perl are held around the world - often in Russia (often with the participation of foreign guests). Participation in such events is usually free.

By the way, one of such conferences will be held very soon, on May 12-13, in Kiev. If you have time, opportunity and interest in the Perl language, I highly recommend coming to listen to the reports and chat with people using this language in everyday life. Participation in the conference is free, you only need to register and submit an application for participation on the conference website .

Perl gives everything to write elegant and expressive code. Multi-paradigm, modifiable, adaptable to any development model. PS and of course you shouldn’t forget that good perl programmers will always have interesting and well-paid work.

Perl has been developing very rapidly lately. There were very high-quality web frameworks, such as Mojolicious , Dancer . A completely asynchronous Tatsumaki web framework has appeared , which in performance can compete with Node.js. So for developing web applications, Perl fits perfectly. And if you consider that Perl has one of the best testing systems, then development using TDD (Test Driven Development) becomes one sheer pleasure, and the programs are of very high quality.

Perl is a clever language. It was developed by a linguist by profession. Therefore, Perl is a set of basic building blocks from which to build a beautiful building for your web project. Any finished parts of the building can be found on CPAN or the new METACPAN search engine. This allows you to build a web project building with the highest possible speed.

In general, by choosing a Perl programming language, you definitely win.

Perl is very laconic, lively, elegant and at the same time CPAN-thermonuclear. It combines different traditions and no condemnation. He gives calm and finds harmony. The rest --- faded shadow and vanity.

Pearl allows you to focus on the problem, and not on its implementation, works everywhere, never broke backward compatibility and does not intend to. Very good language for newbies: you can write full-fledged working programs from day one and learn new features gradually. Example:

 my $name = "World"; if ($name eq 'World') { print "Hello, $name\n"; } else { print "Bye, $name\n"; } 

On perl it is easy and quick to write:

• bot spider.
• processing system of terabytes of text and html.
• window application under linux (qt, gtk).
• web interface (Rose :: DB + HTML :: Template + fastcgi), which will not fall from 1000 simultaneous connections.
• one-liners for everyday tasks ( cat access.log|perl -le 'split,$h{$_[0]}++ for <>; $,="\n"; print map{"$_ $h{$_}"} sort{$h{$a}<=>$h{$b}}keys %h'|tail )
• client for any web and not only service.
• and much more.

I would rewrite the last example as follows:

 my $name = 'World'; my $greet = $name eq 'World' ? 'Hello' : 'Bye'; say $greet . ',' . $name; 

And besides word processing, perl is very good for system programming under unix like OS. Various systems for monitoring networks, equipment, etc. are written on it. And in this area it is much more popular than C / C ++, because the speed of development on it is many times faster.

Better not start learning Perl, since the demand for Perl programmers fell almost 2 times in the previous year! Exactly the same picture with PHP programmers ... Better start learning Ruby, Ruby on rails or Python + Django. The demand for these programmers has almost doubled! Despite the fact that Perl is quite a powerful and flexible language, it can be studied only for self-development, but not for professional activities, as it gradually dies before our eyes. He is being replaced by completely new solutions.