Check Your Work, Dan Chak.rb

# Dan Chak, author of O'Reilly's "Enterprise Rails" thinks that Ruby has inner methods.
# See "Enterprise Rails", pg. 140.

class Foo
  def bar
    "outer bar"
  end

  def foo
    # Dan Chak thinks this can only be called from within #foo.
    def bar
      "'inner' bar"
    end

    bar
  end
end

# Dan Chak is wrong.
puts Foo.new.bar
puts Foo.new.foo
puts Foo.new.bar

# "def" adds a method to a class.  There is no notion of scope.
# The first Foo.new.bar runs the first #bar method, and the call
# to Foo.new.foo redefines #bar before the second call.