如果键存在，如何在散列中重命名键-Howtorenameakeyinahashifitexists

I have the following hash:

我有以下散列:

a = {
  foo: 'bar',
  answer: '42'
}

How can I elegantly rename the key :foo to a new key :test? If the hash entry for :foo does not exist, the hash should not be altered.

如何优雅地将key:foo重命名为新的key:test?如果:foo的散列条目不存在，则不应该修改散列。

1 个解决方案