Ruby OpenStruct.dig用法及代碼示例

在 name 和 identifiers 指定的嵌套對象中查找並返回對象。嵌套對象可以是各種類的實例。見Dig Methods。

例子：

require "ostruct"
address = OpenStruct.new("city" => "Anytown NC", "zip" => 12345)
person  = OpenStruct.new("name" => "John Smith", "address" => address)
person.dig(:address, "zip") # => 12345
person.dig(:business_address, "zip") # => nil