Ruby OpenStruct.dig用法及代码示例

在 name 和 identifiers 指定的嵌套对象中查找并返回对象。嵌套对象可以是各种类的实例。见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