block-local-vars-3.rb

cat = "Tama"
rabbit = "Peter"

%w[Pochi Taro Hachi].map do |dog; cat, rabbit, wolf|
  p cat #=> nil
  p rabbit #=> nil
  p wolf #=> nil
  cat = dog
  rabbit = "Bob"
end

p cat #=> "Tama"
p rabbit #=> "Peter"
p wolf #=> NameError: undefined local variable or method `wolf' for XXX