Collection::Utl::Mirror -  Mirror two collections.

    use Collection::Utl::Mirror;
     my $coll1 = ( new Collection::Utl::Mem:: mem => \%h1 );# fast but nonstable source ( Memcached )
     my $coll2 = ( new Collection::Utl::Mem:: mem => \%h2 );# slow but stable source ( database )

     my $mirror_coll1 =  new Collection::Utl::Mirror:: $coll1, $coll2 ;

Mirror two collections.

Fetch keys from collection1. And then from collection2

create items

Return union of keys from collection1 and collection2

Tie::StdHash

Zahatski Aliaksandr, <zag@cpan.org>

Copyright (C) 2005-2009 by Zahatski Aliaksandr

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.