在Ruby中创建模块变量

module Site
  @@name = \"StackOverflow\"

  def self.setName(value)
    @@name = value
  end

  def self.name
    @@name
  end
end

Site.name            # => \"StackOverflow\"
Site.setName(\"Test\")
Site.name            # => \"Test\"

module SomeModule
  module_function
  def param; @param end
  def param= v; @param = v end
end

SomeModule.param
# => nil
SomeModule.param = 1
SomeModule.param
# => 1

@param

SomeModule

Module

module MyModule
   class << self; attr_accessor :var; end
end

MyModule.var = \'this is saved at @var\'

MyModule.var    
=> \"this is saved at @var\"

module MyModule
  class << self
    attr_accessor :my_variable
  end
  self.my_variable = 2 + 2
end

p MyModule.my_variable