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This is a lightweight module which provides 'Junction' operators, the most commonly used being any and all.

The Params::Validate module allows you to validate method or function call parameters to an arbitrary level of specificity. At the simplest level, it is capable of validating the required parameters were given and that no unspecified additional parameters were passed in. It is also capable of determining that a parameter is of a specific type, that it is an object of a certain class hierarchy, that it possesses certain methods, or applying validation callbacks to arguments.

Implements a close simulation of the say function in Perl 6, which acts like print but automatically appends a newline.

Paranoid is a collection of modules started out as modules which perform things (debatably) in a safer and taint-safe manner. Since then it's also grown to include functionality that fit into the same framework and conventions of the original modules, including keeping the debug hooks for command-line debugging.

Perl's filehandles are implemented as a stack of layers, with the bottom-most usually doing the actual IO and the higher ones doing buffering, encoding/decoding or transformations. PerlIO::Layers allows you to query the filehandle's properties concerning there layers.

PerlIO::Util provides general PerlIO utilities: utility layers and utility methods. Utility layers are a part of PerlIO::Util, but you don't need to say use PerlIO::Util for loading them. They will be automatically loaded.

Parse::CPAN::Meta is a parser for META.yml files, based on the parser half of YAML::Tiny. It supports a basic subset of the full YAML specification, enough to implement parsing of typical META.yml files, and other similarly simple YAML files.

PerlIO layer to use the encoding of the current locale.

parse CPAN's package index

This module implements a PerlIO layer that can only read files and return an MD5 digest of the contents of the file.