如果我在Ruby on Rails中有一个哈希值，有没有办法让它无差别的访问？
如果我已经有一个散列，我可以做到这一点
h[:foo] h['foo'] 是相同的？ （这被称为无差别访问？）
细节：我在initializers使用了以下哈希加载，但可能不应该有所作为：
SETTINGS = YAML.load_file("#{RAILS_ROOT}/config/settings.yml")
你可以使用with_indifferent_access 。
SETTINGS = YAML.load_file("#{RAILS_ROOT}/config/settings.yml").with_indifferent_access
如果你已经有一个散列，你可以这样做：
HashWithIndifferentAccess.new({'a' => 12})[:a]
你也可以这样写YAML文件：
--- !map:HashWithIndifferentAccess one: 1 two: 2
之后：
SETTINGS = YAML.load_file("path/to/yaml_file") SETTINGS[:one] # => 1 SETTINGS['one'] # => 1
使用HashWithIndifferentAccess而不是普通的哈希。
为了完整性，写：
SETTINGS = HashWithIndifferentAccess.new(YAML.load_file("#{RAILS_ROOT}/config/settings.yml"))
You can just make a new hash of HashWithIndifferentAccess type from your hash. hash = { "one" => 1, "two" => 2, "three" => 3 } => {"one"=>1, "two"=>2, "three"=>3} hash[:one] => nil hash['one'] => 1 make Hash obj to obj of HashWithIndifferentAccess Class. hash = HashWithIndifferentAccess.new(hash) hash[:one] => 1 hash['one'] => 1
