Tie::Array::Boolean - A memory efficient array of boolean values.

This document describes Tie::Array::Boolean version 0.0.1

    use Tie::Array::Boolean;

    tie my @t, 'Tie::Array::Boolean';

    # how many 'true' values are in the array
    my $true_count = tied(@t)->get_truth_count();

This module implements an array as a scalar with each element represented as one bit. Every element of the array can be only 0 or 1.

After an array has been tied to the module, it has the same interface as a normal array. Every value set to 0, undef, the string '0', or the empty string will be 0. Every value set to anything else will be 1.

get_truth_count

Call this method on the object returned by tie or tied. It will return the number of elements in the array that are true. This is more efficient than counting values through the array interface.

None.

Tie::Array::Boolean requires no configuration files or environment variables.

Tie::Array::Boolean uses only the core module, Tie::Array.

None reported.

• The array doesn't always contract in size like a real one would when items are deleted.
• There are no undef values. If you delete a value in the middle of the array, it will be set to 0.

Please report any bugs or feature requests to bug-tie-array-boolean@rt.cpan.org, or through the web interface at http://rt.cpan.org.

Kyle Hasselbacher <kyleha@gmail.com>

Copyright (c) 2008, Kyle Hasselbacher <kyleha@gmail.com>. All rights reserved.

This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.

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