Question

我在下面有一个名为disciplines的哈希：

disciplines = {"Architecture"=>"architecture", "Auditing"=>"auditing", "Consulting"=>"consulting", "Delivery"=>"delivery", "Development"=>"development", "Engineering"=>"engineering", "Environment / IT"=>"environment", "Graphic Design"=>"graphic_design", "Management"=>"management", "Requirements"=>"requirements", "Research"=>"research", "Support"=>"support", "System Design"=>"system_design", "Test & Eval"=>"test_and_evaluation", "Writing"=>"writing"}

我想把它转换成一个看起来像这样的哈希数组：

[{"name"=>"Architecture", "value"=>"architecture"}, {"name"=>"Auditing", "value"=>"auditing"}, {"name"=>"Consulting", "value"=>"consulting"}, {"name"=>"Delivery", "value"=>"delivery"}, {"name"=>"Development", "value"=>"development"}, {"name"=>"Engineering", "value"=>"engineering"}, {"name"=>"Environment / IT", "value"=>"environment"}, {"name"=>"Graphic Design", "value"=>"graphic_design"}, {"name"=>"Management", "value"=>"management"}, {"name"=>"Requirements", "value"=>"requirements"}, {"name"=>"Research", "value"=>"research"}, {"name"=>"Support", "value"=>"support"}, {"name"=>"System Design", "value"=>"system_design"}, {"name"=>"Test & Eval", "value"=>"test_and_evaluation"}, {"name"=>"Writing", "value"=>"writing"}]

所以我只想在第一个哈希中获取每个键值对并将其映射到一个新哈希，其中键现在是name的值，该值现在是{{1}的值并将它们全部放入哈希数组中

Answer 1

您可以这样做：

disciplines.map{ |k, v| { 'name' => k, 'value' => v } }

实现这一点。

以下是演示：http://ideone.com/DBU3Ck

Answer 2

您也可以这样做：

array_of_hashes = disciplines.keys.inject([]) do |arr_of_hsh, item|
      arr_of_hsh << ({name: item.downcase,value: item.capitalize})
    end

输出将如下所示：

# array_of_hashes => [{:name=>"architecture", :value=>"Architecture"}, {:name=>"auditing", :value=>"Auditing"}, {:name=>"consulting", :value=>"Consulting"}, {:name=>"delivery", :value=>"Delivery"}, {:name=>"development", :value=>"Development"}, {:name=>"engineering", :value=>"Engineering"}, {:name=>"environment / it", :value=>"Environment / it"}, {:name=>"graphic design", :value=>"Graphic design"}, {:name=>"management", :value=>"Management"}, {:name=>"requirements", :value=>"Requirements"}, {:name=>"research", :value=>"Research"}, {:name=>"support", :value=>"Support"}, {:name=>"system design", :value=>"System design"}, {:name=>"test & eval", :value=>"Test & eval"}, {:name=>"writing", :value=>"Writing"}]

如何将此哈希转换为哈希数组？

2 个答案: