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A Perl module is a discrete component of software for the Perl ... Since Hello/World.pm is not in your @INC path, you must specify . on the command line to run the ...
The Perl Object Environment (POE) is a library of Perl modules written in the Perl programming language by Rocco Caputo et al. . From CPAN: "POE originally was developed as the core of a persistent object server and runtime environment.
Perl control structures; Perl modules - modular extensions of the Perl language. The following modules (and module groups) and many more, including support for them (manuals, etc.) can be found on CPAN.org, using its search box: Webpage-related modules – for creating, serving, fetching, and parsing web pages CGI.pm; Library for WWW in Perl ...
Perl comes with a small set of core modules. Some of these perform bootstrapping tasks, such as ExtUtils::MakeMaker, [5] which is used to create Makefiles for building and installing other extension modules; others, like List::Util, [6] are merely commonly used. CPAN's main purpose is to help programmers locate modules and programs not included ...
To make this module available to Perl it must be compiled. Build tools like ExtUtils::MakeMaker can do this automatically. (To build manually: the xsubpp tool parses an XS module and outputs C source code; that source code is then compiled to a shared library and placed in a directory where Perl can find it.)
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.
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I felt showing just a single object-oriented module, and the mention that procedural style is considered "old", was not a valid representation of the state of writing modules in Perl. Perl is a hybrid language, both OO and procedural styles are considered quite valid, should be used as appropriate and there's large piles of procedural modules ...