如何优雅地重命名Ruby中的哈希中的所有键？ [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式重命名所有的密钥，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.map {|k, v| [mappings[k], v] }.to_h

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