Sort::Key::Register - tell Sort::Key how to sort new data types.
use Sort::Key::Register Person => sub { $_->surname, $_->name }, qw(string string); use Sort::Key::Register 'Color::Component' => 'integer'; use Sort::Key::Register Color => sub { $_->R, $_->G, $_->B }, ('Color::Component') x 3;
Sort::Key::Register allows one to register new data types with Sort::Key so that they can be sorted as natively supported ones.
It works as a pragma module and doesn't export any function, all its functionality is provided via use:
use
use Sort::Key::Register ...
To avoid collisions between modules registering types with the same name, you should qualify them with the package name.
use Sort::Key::Register 'MyPkg::foo' => sub { $_ }, '-int'; # or using __PACKAGE__: use Sort::Key::Register __PACKAGE__, sub { $_ }, '-int';
registers type $name.
$name
&multikeygen is the multi-key extraction function for the type and @keytypes are the types of the extracted keys.
&multikeygen
@keytypes
this 'use' is useful for simple types that are sorted as another type already registered, maybe changing the direction of the sort (ascending or descending).
Sort::Key, Sort::Key::Maker.
Salvador Fandiño, <sfandino@yahoo.com>
Copyright (C) 2005, 2014 by Salvador Fandiño
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.4 or, at your option, any later version of Perl 5 you may have available.
To install Sort::Key, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Sort::Key
CPAN shell
perl -MCPAN -e shell install Sort::Key
For more information on module installation, please visit the detailed CPAN module installation guide.