ruby-on-rails - Ruby 哈希创建

Question

我是 Ruby 的新手，最近正在努力学习 Ruby。今天在刷Hash，卡在了Hash相关的问题上

我有以下哈希

{"key1" => ["param_1","param_2"], "key2" => ["param_3","param_4"], "key3" => "param_5", "key4" => "param_6","key5" => ["param_7","param_8"]}

我想将上面的 Hash 转换成下面的。

{"my_hash" => [ {"name" => "key1","value" => ["param_1","param_2"]},
                {"name" => "key2","value" => ["param_3","param_4"]},
                {"name" => "key3","value" => ["param_5"]},
                {"name" => "key4","value" => ["param_6"]},
                {"name" => "key5","value" => ["param_7","param_8"]}
              ]
}

谁能告诉我如何用 Ruby 高效地做到这一点。

Answer 1

hsh = {"key1" => ["param_1","param_2"],
       "key2" => ["param_3","param_4"], "key3" => "param_5", 
      "key4" => "param_6","key5" => ["param_7","param_8"]}
hsh.map{|k,v| {name: k,value: Array(v) }}
# => [{:name=>"key1", :value=>["param_1", "param_2"]},
#     {:name=>"key2", :value=>["param_3", "param_4"]},
#     {:name=>"key3", :value=>["param_5"]},
#     {:name=>"key4", :value=>["param_6"]},
#     {:name=>"key5", :value=>["param_7", "param_8"]}]

---

hsh = {"key1" => ["param_1","param_2"],
       "key2" => ["param_3","param_4"], "key3" => "param_5", 
      "key4" => "param_6","key5" => ["param_7","param_8"]}
hsh.map{|k,v| {"name" => k,"value" => Array(v) }}
# => [{"name"=>"key1", "value"=>["param_1", "param_2"]},
#     {"name"=>"key2", "value"=>["param_3", "param_4"]},
#     {"name"=>"key3", "value"=>["param_5"]},
#     {"name"=>"key4", "value"=>["param_6"]},
#     {"name"=>"key5", "value"=>["param_7", "param_8"]}]