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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package Memoize::Storable;
=head1 NAME
Memoize::Storable - store Memoized data in Storable database
=head1 DESCRIPTION
See L<Memoize>.
=cut
use Storable ();
$VERSION = '1.03';
$Verbose = 0;
sub TIEHASH {
require Carp if $Verbose;
my $package = shift;
my $filename = shift;
my $truehash = (-e $filename) ? Storable::retrieve($filename) : {};
my %options;
print STDERR "Memoize::Storable::TIEHASH($filename, @_)\n" if $Verbose;
@options{@_} = ();
my $self =
{FILENAME => $filename,
H => $truehash,
OPTIONS => \%options
};
bless $self => $package;
}
sub STORE {
require Carp if $Verbose;
my $self = shift;
print STDERR "Memoize::Storable::STORE(@_)\n" if $Verbose;
$self->{H}{$_[0]} = $_[1];
}
sub FETCH {
require Carp if $Verbose;
my $self = shift;
print STDERR "Memoize::Storable::FETCH(@_)\n" if $Verbose;
$self->{H}{$_[0]};
}
sub EXISTS {
require Carp if $Verbose;
my $self = shift;
print STDERR "Memoize::Storable::EXISTS(@_)\n" if $Verbose;
exists $self->{H}{$_[0]};
}
sub DESTROY {
require Carp if $Verbose;
my $self= shift;
print STDERR "Memoize::Storable::DESTROY(@_)\n" if $Verbose;
if ($self->{OPTIONS}{'nstore'}) {
Storable::nstore($self->{H}, $self->{FILENAME});
} else {
Storable::store($self->{H}, $self->{FILENAME});
}
}
sub FIRSTKEY {
'Fake hash from Memoize::Storable';
}
sub NEXTKEY {
undef;
}
1;