如何优雅地重命名 Ruby 散列中的所有键? [英] How to elegantly rename all keys in a hash in Ruby?

问题描述

我有一个 Ruby 哈希:

I have a Ruby hash:

ages = { "Bruce" => 32,
         "Clark" => 28
       }

假设我有另一个替换名称的散列，是否有一种优雅的方法来重命名所有键，以便我最终得到:

Assuming I have another hash of replacement names, is there an elegant way to rename all the keys so that I end up with:

ages = { "Bruce Wayne" => 32,
         "Clark Kent" => 28
       }

推荐答案

ages = { 'Bruce' => 32, 'Clark' => 28 }
mappings = { 'Bruce' => 'Bruce Wayne', 'Clark' => 'Clark Kent' }

ages.transform_keys(&mappings.method(:[]))
#=> { 'Bruce Wayne' => 32, 'Clark Kent' => 28 }

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