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

问题描述

让我们说一下我是否有这样的哈希值:

Let us say if I have a hash like this:

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

现在，如何将键"key5"替换为其他键名，例如"key6"?

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

我知道如何遍历散列并转储值，但是我不知道如何在适当位置替换键或值.

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 运算符返回要删除的值.所以这个

The delete operator returns the value being deleted. So this

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

将满足您的需求.

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