递归地将哈希转换为OpenStruct

require 'ostruct'

def hash_to_openstruct(hash)
  OpenStruct.new(hash.each_with_object({}) do |(key, value), memo|
    if value.is_a?(Hash)
      memo[key] = hash_to_openstruct(value)
    else
      memo[key] = value
    end
  end)
end

# 示例哈希
example_hash = {
  name: "John",
  age: 30,
  address: {
    street: "123 Main St",
    city: "Anytown"
  }
}

# 转换为OpenStruct
openstruct_obj = hash_to_openstruct(example_hash)

# 访问属性
puts openstruct_obj.name       # 输出: John
puts openstruct_obj.address.city # 输出: Anytown

def hash_to_openstruct(hash, seen = Set.new)
  return hash if seen.include?(hash)
  seen.add(hash)

  OpenStruct.new(hash.each_with_object({}) do |(key, value), memo|
    if value.is_a?(Hash)
      memo[key] = hash_to_openstruct(value, seen)
    else
      memo[key] = value
    end
  end)
end