我写在Perl子合并2个散列结构相同;这样会导致该合并($ A,$ B)如何合并在Perl 2个深哈希
$a = {
k1 => { sk1 => 'v1' },
k2 => { sk3 => 'v3', sk4 => 'v4' }
};
$b = {
k1 => { sk2 => 'v2'},
k3 => { sk5 => 'v5'}
};
在
$c = {
k1 => { sk1 => 'v1', sk2 => 'v2' },
k2 => { sk3 => 'v3', sk4 => 'v4' }
k3 => { sk5 => 'v5'}
};
下面是我对合并的代码,这是行不通的。我该如何纠正它?谢谢。
sub merge {
my ($old,$new) = @_;
foreach my $k (keys($old)) {
if (exists $new->{$k}) {
if (ref($old->{$k}) eq 'HASH') {
merge($old->{$k},$new->{$k});
} else {
$new->{$k} = $old->{$k};
}
} else {
$new->{$k} = $old->{$k};
}
}
return $new;
}
可能的重复[如何在Perl中结合散列?](http://stackoverflow.com/questions/350018/how-can-i-combine-hashes-in-perl) – Ether 2010-10-30 23:20:18