Math::PartialOrder::Std - standard iterative class for partial orders (datatype hierarchies).
use Math::PartialOrder::Std; # ... any Math::PartialOrder::Base method
Math::PartialOrder, Carp, Exporter
Math::PartialOrder::Std is a Math::PartialOrder::Base implementation for rooted finite partial orders (datatype hierarchies) which uses hash-references to store and manipulate hierarchy information. The hashrefs used have keys which are eq to their values.
eq
Math::PartialOrder::Std inherits from Math::PartialOrder::Base, and implements all required methods described in Math::PartialOrder::Base.
new( {root=>$r} )
Creates and returns a new Math::PartialOrder::Std object rooted at $r, which defaults to 'BOTTOM'.
_ancestors($type)
Returns the ancestors of $type as a hash reference.
_descendants($type)
Returns the descendants of $type as a hash reference.
_minimize(\%hash)
Destructively minimizes the values of the hash-reference \%hash. Returns \%hash.
_maximize(\%hash)
Destructively maximizes the values of the hash-reference \%hash. Returns \%hash.
_types()
Returns the hashref whose values represent all of the types in the hierarchy.
_root(), _root($r)
Get/set the root of the hierarchy.
_parents(), _parents($type)
_parents()
_parents($type)
With no arguments, returns a reference to a hash keyed by type whose values are hashrefs representing the parents of the keying type.
With one argument, returns the hashref representing the parents of $type.
_children(), _children($type)
_children()
_children($type)
With no arguments, returns a reference to a hash keyed by type whose values are hashrefs representing the children of the keying type.
With one argument, returns the hashref representing the children of $type.
_attributes(), _attributes($type), _attributes($type, $hashref)
_attributes()
_attributes($type)
_attributes($type, $hashref)
With no arguments, returns a reference to a hash of attribute-hashes keyed by type. With one argument, returns a reference to the attributes for $type. With 2 arguments, sets the attributes for $type to $hashref.
perl by Larry Wall.
Usage of hash-references as sets draws heavily on Jarkko Hietaniemi's Set::Scalar module.
Bryan Jurish <jurish@ling.uni-potsdam.de>
Copyright (c) 2001, Bryan Jurish. All rights reserved.
This package is free software. You may redistribute it and/or modify it under the same terms as Perl itself.
perl(1). Math::PartialOrder(3pm). Math::PartialOrder::Base(3pm). Math::PartialOrder::Caching(3pm). Math::PartialOrder::LRUCaching(3pm). Math::PartialOrder::CMasked(3pm). Math::PartialOrder::CEnum(3pm). Math::PartialOrder::Loader(3pm). Set::Scalar(3pm).
To install Math::PartialOrder, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Math::PartialOrder
CPAN shell
perl -MCPAN -e shell install Math::PartialOrder
For more information on module installation, please visit the detailed CPAN module installation guide.