false_nyan.rb

gistfile1.rb

class Nyan
  attr_accessor :piyo

  def test
    p piyo
    if false
       p "in!!!!!!!!!!!!!!"
       piyo = "wan!!"
    end
    p piyo
  end
end

a = Nyan.new
a.piyo = "nyan"
a.test

#=> "nyan"
#=> nil