晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //usr/share/perl5/Memoize/ExpireTest.pm
package Memoize::ExpireTest;

=head1 NAME

Memoize::ExpireTest - test for Memoize expiration semantics

=head1 DESCRIPTION

This module is just for testing expiration semantics.  It's not a very
good example of how to write an expiration module.

If you are looking for an example, I recommend that you look at the
simple example in the Memoize::Expire documentation, or at the code
for Memoize::Expire itself.

If you have questions, I will be happy to answer them if you send them
to mjd-perl-memoize+@plover.com.

=cut

$VERSION = '1.03';
my %cache;

sub TIEHASH {	
  my ($pack) = @_;
  bless \%cache => $pack;
}

sub EXISTS {
  my ($cache, $key) = @_;
  exists $cache->{$key} ? 1 : 0;
}

sub FETCH {
  my ($cache, $key) = @_;
  $cache->{$key};
}

sub STORE {
  my ($cache, $key, $val) = @_;
  $cache->{$key} = $val;
}

sub expire {
  my ($key) = @_;
  delete $cache{$key};
}

1;

haha - 2025