NAME
Tie::IxHash::FixedSize - Tie::IxHash with a fixed maximum size
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'ABSTRACT
Hashes tied to Tie::IxHash::FixedSize will only hold a fixed maximum number of keys before automatically removing old keys.
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
AUTHOR
Michael Schout, <mschout@gkg.net>
COPYRIGHT AND LICENSE
Copyright (C) 2008 by Michael Schout
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.8 or, at your option, any later version of Perl 5 you may have available.