ruby on rails(Ruby 元编程) 动态定义实例变量使用instance_variable_set方法# obj.instance_variable_set(symbol, obj)    -> obj # obj.instance_variable_set(string, obj)    -> obj class Fred  def initialize(p1, p2)    @a, ...

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The enum defined like this: enum status: %i[pending unfinished finished] You can get the integer like so: < Rails 5 my_model = MyModel.find(123) my_model[:status] # Returns the integer value Rails 5+ my_model.status_before_type_cast # Ret...

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使用 Homebrew 安装gpg brew install gnupg 安装mpapis公钥 gpg --keyserver hkp://pgp.mit.edu --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB 安装最新版本的Ruby的RVM \curl -sSL htt...

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