如何替换具有'。'的所有散列键？ [英] How to replace all hash keys having a '.'?

问题描述

我正在使用Ruby on Rails 4，并且想要替换所有散列键，以便从

I am using Ruby on Rails 4 and I would like to replace all hash keys so to change the hash from

h_before = {:"aaa.bbb" => 1, :c => 2, ...}

至

h_after = {:bbb => 1, :c => 2, ...}

也就是说，我想要去模块化所有散列键。。

That is, I would like to someway "demodulize" all hash keys having the .. How can I make that?

推荐答案

h_before = {:"aaa.bbb" => 1, :c => 2}
h_after =
h_before.inject({}){|h, (k, v)| h[k.to_s.split(".").last.to_sym] = v; h}
# => {:bbb = > 1, :c => 2}

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