NAME

Tie::IxHash::FixedSize - Tie::IxHash with a fixed maximum size

VERSION

version 1.02

SYNOPSIS

  use Tie::IxHash::FixedSize;

  tie my %h, 'Tie::IxHash::FixedSize', {size => 3},
    one   => 1,
    two   => 2,
    three => 3;

  print join ' ', keys %h;   # prints 'one two three'

  $h{four} = 4;  # key 'one' is removed, 'four' is added

  print join ' ', keys %h;   # prints 'two three four'

DESCRIPTION

Hashes tied with Tie::IxHash::FixedSize behave exactly like normal Tie::IxHash hashes, except the maximum number of keys that can be held by the hash is limited by a specified size. Once the number of keys in the hash exceeds this size, the oldest keys in the hash will automatically be removed.

The size parameter to tie() specifies the maximum number of keys that the hash can hold. When the hash exceeds this number of keys, the first entries in the hash will automatically be removed until the number of keys in the hash does not exceed the size parameter. If no size parameter is given, then the hash will behave exactly like a plan Tie::IxHash, and the number of keys will not be limited.

SEE ALSO

Tie::IxHash

SOURCE

The development version is on github at http://https://github.com/mschout/tie-ixhash-fixedsize and may be cloned from git://https://github.com/mschout/tie-ixhash-fixedsize.git

BUGS

Please report any bugs or feature requests on the bugtracker website https://github.com/mschout/tie-ixhash-fixedsize/issues

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

AUTHOR

Michael Schout <mschout@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2018 by Michael Schout.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.