合并散列值的两个阵列，同时保持所有不同的值 [英] Merge two arrays of hashes whilst keeping all distinct values

问题描述

我要散列值的两个数组合并成一个新的数组：

I want to merge two arrays of hashes into a new array:

array1 = [{"Name1" => {gender: 'female', nationality: ['german', 'danish']}}]
array2 = [{"Name1" => {gender: 'male', nationality: ['german', 'austrian']}}]

现在，这是我期待的结果：

Now this is the result I am looking for:

new_array = [{"Name1" => {gender: ['female', 'male'], nationality: ['german', 'danish', 'austrian']}}]

唯一合并选项我可以在Ruby文档中，可以找到将覆盖重复与其他哈希值。所以，我怎么能达到我需要的版本？

The only merge options I could find in the Ruby documentation would overwrite duplicates with the other hash. So how can I achieve the version I need?

推荐答案

您可以通过可选的块参数的 哈希＃合并 。该块调用所复制的钥匙。在块的返回值被用于代替被覆盖。

You can pass optional block argument to Hash#merge. The block is invoked for the duplicated keys. in The return value of the block is used instead of being overwritten.

array1 = [{"Name1" => {gender: 'female', nationality: ['german', 'danish']}}]
array2 = [{"Name1" => {gender: 'male', nationality: ['german', 'austrian']}}]

new_array = [{'Name1' => array1[0]['Name1'].merge(array2[0]['Name1']) { |k,o,n|
  Array(o) | Array(n)
}}]
# => [{"Name1"=>
#       {:gender=>["female", "male"],
#        :nationality=>["german", "danish", "austrian"]}}]

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