From my understanding Perl traditionally has only included core functionality, and people install additional libraries to do all sorts of useful (and sometimes very basic) things. But at some point there came to be "core libraries" which are shipped with Perl by default – so you can use these libraries without installing them.
Coming from Python I'm curious how this is managed. Specifically:
CPAN, the Comprehensive Perl Archive Network is the system that makes these available for others to download and install. CPAN uses PAUSE's permissions data to determine if a given release contains unauthorized packages.
A library is a collection of loosely related functions designed to be used by other programs. It lacks the rigorous semantics of a Perl module. The file extension . pl indicates that it's a Perl library file.
In Perl a true value is any value that is not: null, zero or a zero-length string. A distribution is a collection of files that usually includes a Perl module and several other files.
Switch
.@INC
) not their fault, and finally fixed with 5.12. This is the reason where the recommendation comes from to compile your own perl and not mess with the system installation. With 5.12, you are supposed to just use CPAN to install an upgraded version of a core module, and it gets installed addtionally to the one shipped with the system, but since the new one comes before the old one in the include path, the new one gets loaded when you use
/require
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