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Bit::Vector is an efficient C library which allows you to handle bit vectors, sets (of integers), "big integer arithmetic" and boolean matrices, all of arbitrary sizes. The library is efficient (in terms of algorithmical complexity) and therefore fast (in terms of execution speed) for instance through the widespread use of divide-and-conquer algorithms.
CGI.pm is a stable, complete and mature solution for processing and preparing HTTP requests and responses. Major features including processing form submissions, file uploads, reading and writing cookies, query string generation and manipulation, and processing and preparing HTTP headers. Some HTML generation utilities are included as well. CGI.pm performs very well in in a vanilla CGI.pm environment and also comes with built-in support for mod_perl and mod_perl2 as well as FastCGI.
Query, download and build perl modules from CPAN sites.
Software distributions released to the CPAN include a META.json or, for older distributions, META.yml, which describes the distribution, its contents, and the requirements for building and installing the distribution. The data structure stored in the META.json file is described in CPAN::Meta::Spec.
This module implements a subset of the YAML specification for use in reading and writing CPAN metadata files like META.yml and MYMETA.yml. It should not be used for any other general YAML parsing or generation task.
The CPANPLUS library is an API to the CPAN mirrors and a collection of interactive shells, commandline programs, etc, that use this API.
CSS::Tiny is a perl class to read and write .css stylesheets with as little code as possible, reducing load time and memory overhead.
Cairo provides Perl bindings for the vector graphics library cairo. It supports multiple output targets, including the X Window Systems, PDF, and PNG. Cairo produces identical output on all those targets and makes use of hardware acceleration wherever possible.
The Carp routines are useful in your own modules because they act like die() or warn(), but with a message which is more likely to be useful to a user of your module. In the case of cluck, confess, and longmess that context is a summary of every call in the call-stack. For a shorter message you can use carp or croak which report the error as being from where your module was called. There is no guarantee that that is where the error was, but it is a good educated guess.