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A module defines its source code to be in a package (much like a Java package), the Perl mechanism for defining namespaces, e.g. CGI or Net::FTP or XML::Parser; the file structure mirrors the namespace structure (e.g. the source code for Net::FTP is in Net/FTP.pm).
The next layer, built from POE::Filter and probably the focus of most Perl Obfuscation Efficianados (see POE #POE Humor below), is the POE::Filter set: "Filters translate between raw streams and cooked chunks of tasty dada." per `sungo' POE::Filter::Block - parses input as fixed-length blocks. On the output side, it merely passes data through ...
As of Perl 5.10, PCRE is also available as a replacement for Perl's default regular-expression engine through the re::engine::PCRE module. The library can be built on Unix, Windows, and several other environments.
It provides text processing facilities without the arbitrary data-length limits of many contemporary Unix command line tools. [16] Perl is a highly expressive programming language: source code for a given algorithm can be short and highly compressible. [17] [18]
Perl is an open-source programming language whose first version, 1.0, was released in 1987. The following table contains the Perl 5 version history, showing its release versions.
Perl Package Manager (PPM) is a Perl utility intended to simplify the tasks of locating, installing, upgrading and removing software packages. It can determine if the most recent version of a software package is installed on a system, and can install or upgrade that package from a local or remote host.
The Perl virtual machine is a stack-based process virtual machine implemented as an opcodes interpreter which runs previously compiled programs written in the Perl language. The opcodes interpreter is a part of the Perl interpreter, which also contains a compiler (lexer, parser and optimizer) in one executable file, commonly /usr/bin/perl on various Unix-like systems or perl.exe on Microsoft ...
ActivePerl is a distribution of Perl from ActiveState (formerly part of Sophos) for Windows, macOS, Linux, Solaris, AIX and HP-UX.. A few main editions are available, including: Community (free, for development use only), and several paid tiers up to Enterprise that includes support for OEM licensing.