使用defineu方法定义实例和类方法

Posted 2021-02-25

class Example
  class << self
    define_method(:one) { puts 'one' }
    define_method(:two) { puts 'two' }
  end
 
  define_method(:three) { puts 'three' }
  define_method(:four)  { puts 'four'  }
end
 
Example.one #=> one
Example.two #=> two
 
Example.new.three #=> three
Example.new.four  #=> four