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

问题描述

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

现在，我可以如何用其他键名称'key6'替换'key5' ？我知道如何循环访问哈希&转储值，但我不知道如何替换键或值的地方。感谢您的帮助。

解决方案

删除运算符返回值删除。所以这个

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

可以满足您的要求。

Let us say if I have a hash like this:

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

Now, how can I replace the the key 'key5' with some other key name say 'key6'? I know how to loop through the hash & dump the values but I don't know how to replace keys or values in place. Thanks for your help.

解决方案

The delete operator returns the value being deleted. So this

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

will do what you're looking for.

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