Black Perl - Wikipedia
"Black Perl" is a code poem written using the Perl programming language. It was posted anonymously to Usenet on April 1, 1990,[1] and is popular among Perl programmers[citation needed] as a piece of Perl poetry. Written in Perl 3, the poem is able to be executed as a program. "Black Perl" has been discussed in several scholarly works,[2][3][4] and is considered an example of generative literature,
Wherefore Art, Thou? | Linux Journal
I don't know whether a picture is really worth a thousand words (most pictures seem to be considerably larger these days), but when I give talks about Perl, I often put up a picture showing where some of the ideas in Perl come from. I usually make a joke about Linguistics not really being the opposite of Common Sense, and then proceed to talk a lot about both of them, with some Computer Science th
Learning Perl the Hard Way
by Allen B. Downey. Download this book in PDF. Read other books from Green Tea Press. Do we really need another Perl book? Well obviously I think so, and here's why: I want a book for people who already know how to program in another language, but don't know Perl. I want a book that gets through the basics as quickly as possible. I'm sick of reading about the precedence of operators; I want to kno
Modern Perl | Onyx Neon Press
A word from our authors… “Aliens!” The Dread Pirate Jack Spartan spit the word carelessly across the beach. He sat just shy of the water’s edge and watched the ship—his ship!—soar ever smaller to the lee of the sun, where a shadowy hulk menaced the otherwise blue sky. There would be no third hijacking, he resolved. The tropical sun bore down. Jack found shade under a palm tree and resumed his read
A Perl regex that matches composite numbers (and doesn't match prime numbers)
Take a look at this Perl regular expression: perl -lne '(1x$_) =~ /^(11+?)\1+$/ && print "$_ is composite"' This regular expression matches only the composite numbers (and doesn't match prime numbers). Can you figure out how it works? I'll give the explanation below but try to figure it out yourself. Here is what happens when you run it: $ perl -lne '(1x$_) =~ /^(11+?)\1+$/ && print "$_ is composi
The 2011 Perl 6 Coding Contest :: Strangely Consistent
With slightly less gratuitous buildup of expectations this year, but with no less grandeur and excitement, we're proud to announce: Today there's two of us arranging the contest: the esteemed Moritz Lenz, and me. Hello. This is a contest for people who are aware that Perl 6 has been "officially released", and who want the perfect excuse to start playing around with the language. As the Perl 6 comm
Your own movie database in 5 minutes with IMDb API and Perl
Software Developer, Pythonista, Data Geek, Student of Life. __init__ Blog Books Update 23.02.2016: I rewrote/improved this script in Python, dropping the database bit, focussing on getting a nice movie page of a list of movies. Cleaner code, better performance (< 1 minute) In this post I will show you how you can easily import IMDb data for your movies and process the XML to get SQL for database i
Hidden features of Perl?
What are some really useful but esoteric language features in Perl that you've actually been able to employ to do useful work? Guidelines: Try to limit answers to the Perl core and not CPAN Please give an example and a short description Hidden Features also found in other languages' Hidden Features: (These are all from Corion's answer) C Duff's Device Portability and Standardness C# Quotes for whi
Perlにおける定数宣言(constant or Readonly or Attribute::Constant) - Unknown::Programming
正直言いますと、個人的には定数って殆ど使わないんですよね。 昔はちょこちょこ使ってたんですが、最近は定数となりうる物は基本的にYAML等外部ファイルに持たせて変更可能にすることが多いのでまったく使ってません。 ですがそれでもPerlで定数を使いたい時にはどーすんの？っていう時のために軽くここにまとめておきます。 言わずもかなPerl5.8にはconstantという定数を定義できる標準モジュールがあります。 use strict; use constant PI => 3.14; # 表示 print PI; # 3.14 # 上書きしようとすると・・・ PI = 3; # Can't modify constant item in scalar assignment とこのように上書きしようとするとエラーを吐いて死にます。 しかも実行時ではなく、コンパイル時にエラーを吐きます。 実はこのc
Perl の数値変換
Last Updated: 2002/03/26 Perl で、16進文字列、10進整数、2進文字列、バイナリー文字列の相互変換を行うための、スクリプトメモです。 特に断っていない限り、Perl 5.001 以上で動作します。 目次 16進文字列からの変換 10進整数からの変換 2進文字列からの変換 バイナリー文字列からの変換 16進文字列→10進整数への変換 hex() 関数は、16進文字列を整数値に、手軽に変換できます。 $num10 = hex("4A"); # $num10 には 74 が入る $num10 = hex("FFFFFF"); # $num10 には 16777215 が入る 余談ですが、数値リテラル中では 0x に続けて 16 進数で記述することで、数値を表すことができます。 $num10 = 0x4A; # 74 $num10 = 0xFFFFFF; # 1677
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Perl One-Liners Explained, Part VII: Handy Regular Expressions
AnyEvent::PerlIsm (@AE_PerlIsm) | Twitter
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Amazon.com: Perl Hacks: Tips & Tools for Programming, Debugging, and Surviving (English Edition): Chromatic, Conway, Damian, Poe, Curtis "Ovid", Poe, Curtis (Ovid): Digital Ebook Purchas