Ruby：合并嵌套散列 [英] Ruby: merge nested hash

问题描述

  a = {：book => 
 [{：title =>Hamlet，
：author =>William Shakespeare
}]} 
 
 b = {：book => 
 [{：title =>Pride and Prejudice，
：author =>Jane Austen
}]} 
  pre> 
 
 
我希望合并为：
  {：书=> 
 [{：title =>Hamlet，
：author =>William Shakespeare}，
 {：title =>傲慢与偏见，
 ：author =>Jane Austen}]} 
  
  
 
解决方案
对于rails 3.0.0+或更高版本，有 deep_merge 功能，用于 ActiveSupport ，它完全符合您的要求。
 
I would like to merge a nested hash.
a = {:book=>
    [{:title=>"Hamlet",
      :author=>"William Shakespeare"
      }]}

b = {:book=>
    [{:title=>"Pride and Prejudice",
      :author=>"Jane Austen"
      }]}
I would like the merge to be:
{:book=>
   [{:title=>"Hamlet",
      :author=>"William Shakespeare"},
    {:title=>"Pride and Prejudice",
      :author=>"Jane Austen"}]}
What is the nest way to accomplish this?
解决方案
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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