Ruby:合并嵌套哈希 [英] Ruby: merge nested hash

问题描述

我想合并一个嵌套的哈希.

I would like to merge a nested hash.

a = {:book=>
    [{:title=>"Hamlet",
      :author=>"William Shakespeare"
      }]}

b = {:book=>
    [{:title=>"Pride and Prejudice",
      :author=>"Jane Austen"
      }]}

我希望合并为:

{:book=>
   [{:title=>"Hamlet",
      :author=>"William Shakespeare"},
    {:title=>"Pride and Prejudice",
      :author=>"Jane Austen"}]}

实现此目的的嵌套方法是什么?

What is the nest way to accomplish this?

推荐答案

对于 rails 3.0.0+ 或更高版本，有 deep_merge 用于 ActiveSupport 的功能，完全符合您的要求.

For rails 3.0.0+ or higher version there is the deep_merge function for ActiveSupport that does exactly what you ask for.

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