Sort::Key::Maker - sorts objetcs combining several keys really fast
# create a function that sorts strings by length: use Sort::Key::Maker sort_by_length => sub { length $_}, qw(integer); # create a multikey sort function; # first key is integer sorted in descending order, # second key is a string in default (ascending) order: use Sort::Key::Maker ri_s_keysort => qw(-integer string); # some sample data... my @foo = qw(foo bar t too tood mama); # and now, use the sorter functions previously made: # get the values on @foo sorted by length: my @sorted = sort_by_length @foo; # sort @foo inplace by its length and then by its value: ri_s_keysort_inplace { length $_, $_ } @foo;
Sort::Key::Maker is a pragmatic module that provides a friendly and easy to use interface for Sort::Key multikey sorting functionality.
It create multikey sorting functions on the fly for any key type combination and exports them to the caller package.
The key types natively accepted are:
string, str, locale, loc, integer, int, number, num
and support for other types can be added via Sort::Key::Register (or also via Sort::Key::register_type()).
exports two subroutines to the caller package: foo_sorter (&@) and foo_sorter_inplace (&\@). They both require a sub reference as their first argument and then respectively, the list to be sorted or an array.
foo_sorter (&@)
foo_sorter_inplace (&\@)
when the first argument after the sorter name is a reference to a subroutine it is used as the multikey extraction function. The generated sorter functions doesn't require neither accept one, i.e.:
use Sort::Key::Maker sort_by_length => sub { length $_ }, 'int'; my @sorted = sort_by_length qw(foo goo h mama picasso);
Sort::Key, Sort::Key::Register.
Sort::Maker also available from CPAN provides similar functionality.
Salvador Fandiño, <sfandino@yahoo.com>
Copyright (C) 2005 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.