Perl合并哈希

Question

可以像这样合并两个哈希:

%one = {
    name    => 'a',
    address => 'b'
};

%two = {
    testval => 'hello',
    newval  => 'bye'        
};

$one{location} = %two;

所以结束哈希看起来像这样:

%one = {
    name    => 'a',
    address => 'b',
    location => {
        testval => 'hello',
        newval  => 'bye'
    }
}

我已经看了一眼,但不确定这是否可以在没有for循环的情况下完成.谢谢 :)

Answer 1

由于散列元素的值是标量,因此无法在散列中存储散列,但可以存储对散列的引用.(同样适用于存储数组和存储到数组中.)

my %one = (
   name    => 'a',
   address => 'b',
);

my %two = (
   testval => 'hello',
   newval  => 'bye',     
);

$one{location} = \%two;

是相同的

my %one = (
   name    => 'a',
   address => 'b',
   location => {
      testval => 'hello',
      newval  => 'bye',
   },
);