如何替换 Perl 哈希键? [英] How can I replace a Perl hash key?

问题描述

假设我有这样的哈希:

$data = {
    'key1' => {
                'key2' => 'value1'
              },
    'key3' => {
                'key4' => {
                            'key5' => 'value2'
                          }
              },
};

现在，我如何用其他键名替换键key5"，比如key6"?

Now, how can I replace the the key 'key5' with some other key name, say 'key6'?

我知道如何遍历哈希并转储值，但我不知道如何替换键或值.

I know how to loop through the hash and dump the values, but I don't know how to replace keys or values in place.

推荐答案

delete 运算符返回被删除的值.所以这个

The delete operator returns the value being deleted. So this

$data->{key3}{key4}{key6} = delete $data->{key3}{key4}{key5}

会做你想要的.

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