ngpestelos · September 29, 2013 04:16
diff --git a/instance_eval.rb b/instance_eval.rb
 # see Metaprogramming Ruby, p. 108

 s1, s2 = "abc", "def"

 s1.instance_eval do
  def swoosh!; reverse; end
 end

 s1.swoosh! # cba
 s2.respond_to?(:swoosh!) # false
	# see Metaprogramming Ruby, p. 108

	s1, s2 = "abc", "def"

	s1.instance_eval do
	def swoosh!; reverse; end
	end

	s1.swoosh! # cba
	s2.respond_to?(:swoosh!) # false