通过相同的键将两个哈希与数组合并

Question

我需要Ruby的帮助。 我有两个从JSON解析出来的哈希值。 我使用以下代码来解析文件：

document = JSON.load File.new("hosts.txt")
file = JSON.load File.new("admins.txt")

结果就是这样的两个大哈希值：

document={"total"=>13, "subtotal"=>13, "page"=>1, "per_page"=>20,
          "search"=>nil, "sort"=>{"by"=>nil, "order"=>nil},
          "results"=>[
             {"ip"=>"10", "environment_id"=>7, 
                 "medium_id"=>nil, "name"=>"one", "id"=>1},
             {"ip"=>"15", "environment_id"=>7, 
                 "medium_id"=>nil, "name"=>"two", "id"=>1},
             {"ip"=>"10.5", "environment_id"=>6, 
                 "medium_id"=>nil, "name"=>"four", "id"=>1}]}

file={"admins"=>[
           {"name"=>"one", "surname"=>"Mark", "email"=>"mark@o.com"},
           {"name"=>"two", "surname"=>"Adam", "email"=>"Adam@o.com"},
           {"name"=>"four", "surname"=>"Ami", "email"=>"Ami@o.com"}]}

从第一个哈希中，我只需要来自结果键的信息，因此我已经完成了

data = document["results"]

对于第二个哈希，我已经做了同样的事情：

people = file["admins"]

现在，当“名称”值相同时，我想将姓和电子邮件从人员数组移到数据数组，并使用另一个哈希，如下所示：

new = {"all_data"=>[
        {"ip"=>"10", "environment_id"=>7, "medium_id"=>nil,
           "name"=>"one", "id"=>1, "surname"=>"Mark", "email"=>"mark@o.com"},
        {"ip"=>"15", "environment_id"=>7, "medium_id"=>nil,
           "name"=>"two", "id"=>1, "surname"=>"Adam", "email"=>"Adam@o.com"},
        {"ip"=>"10.5", "environment_id"=>6, "medium_id"=>nil,
           "name"=>"four", "id"=>1, "surname"=>"Ami", "email"=>"Ami@o.com"}]}

您能帮我做到这一点并解释它如何工作吗？

Answer 1

personal_data = file['admins'].map(&:dup)
                              .group_by { |e| e.delete('name') }

上面的dup / delete技巧不是必需的，因为在任何情况下都可以正确处理下面的merge ，但这是出于语义清晰的目的。

document['results'].map do |h|
  h.merge(personal_data[h['name']].first) if personal_data[h['name']]
end

#⇒ [
#    {"ip"=>"10", "environment_id"=>7, "medium_id"=>nil, "name"=>"one",
#       "id"=>1, "surname"=>"Mark", "email"=>"mark@o.com"},
#    {"ip"=>"15", "environment_id"=>7, "medium_id"=>nil, "name"=>"two",
#       "id"=>1, "surname"=>"Adam", "email"=>"Adam@o.com"},
#    {"ip"=>"10.5", "environment_id"=>6, "medium_id"=>nil, "name"=>"four",
#       "id"=>1, "surname"=>"Ami", "email"=>"Ami@o.com"}]