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

  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'

Hashes tied to Tie::IxHash::FixedSize will only hold a fixed maximum number of keys before automatically removing old keys.

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.

You can contribute or fork this project via github:

http://github.com/mschout/tie-ixhash-fixedsize

 git clone git://github.com/mschout/tie-ixhash-fixedsize.git

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

Michael Schout <mschout@cpan.org>

Copyright (C) 2008 by Michael Schout

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; either version 1, or (at your option) any later version, or
• the Artistic License version 2.0.

Tie::IxHash