NAME

Data::Freq::Field - Controls counting with Data::Freq at each level

VERSION

Version 0.04

METHODS

new

Usage:

    Data::Freq::Field->new({
        type    => 'text' , # { 'text' | 'number' | 'date' }
        sort    => 'count', # { 'value' | 'count' | 'first' | 'last' }
        order   => 'desc' , # { 'asc' | 'desc' }
        pos     => 0      , # { 0 | 1 | 2 | -1 | -2 | .. | [0, 1, 2] | .. }
        key     => 'mykey', # { any key(s) for input hash refs }
        convert => sub {...},
    });

Constructs a field object.

See "field specification" in Data::Freq for details.

evaluate_record

Usage:

    my $field = Data::Freq::Field->new(...);
    my $record = Data::Freq::Record->new(...);
    my $normalized_text = $field->evaluate_record($record);

Evaluates an input record as a normalized text that will be used for frequency counting, depending on the parameters passed to the new() method.

This is intended to be an internal method for Data::Freq.

select_nodes

Usage:

    my $raw_node_list = [values %{$parent_node->children}];
    my $sorted_node_list = $field->select_nodes($raw_node_list);

Sorts and reduces a list of nodes (Data::Freq::Node) at the corresponding depth in the frequency tree, depending on the parameters passed to the new() method.

This is intended to be an internal method for Data::Freq.

type

Retrieves the type parameter.

aggregate

Retrieves the aggregate parameter.

sort

Retrieves the sort parameter.

order

Retrieves the order parameter.

pos

Retrieves the pos parameter as an array ref.

key

Retrieves the key parameter as an array ref.

limit

Retrieves the limit parameter.

offset

Retrieves the offset parameter.

strftime

Retrieves the strftime parameter (POSIX::strftime()).

convert

Retrieves the convert parameter.

AUTHOR

Mahiro Ando, <mahiro at cpan.org>

LICENSE AND COPYRIGHT

Copyright 2012 Mahiro Ando.

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.

cpanm Data::Freq

perl -MCPAN -e shell
install Data::Freq