ruby - 有没有办法在ruby中随机调用特定类的方法？

Question

我想知道是否可以做这样的事情:

class Something
  def A
    puts "A"
  end
  def B
    puts "B"
  end
  def C
    puts "C"
  end
  def D
    puts "D"
  end
end

y = Something.new
x = Random.new
x.rand(y)

然后得到“Something”类的随机结果

Answer 1

单行答案是:

Something.new.send(Something.instance_methods(false).shuffle.first)

解释

Something.instance_methods(false)
# Will give you [:A, :B, :C, :D]

Something.instance_methods(false).shuffle.first
# Will give you a random method out of it

Something.new.send(<method name>)
# Will call that random method and give you output

来自评论(一个很好的建议)

你可以像这样使用它:

Something.instance_methods(false).sample 而不是 Something.instance_methods(false).shuffle.first