Spell: Around Alias

around_alias.rb

# ===================
# Spell: Around Alias
# ===================

# Call the previous, aliased version of a method from a redefined method.

class String
  alias :old_reverse :reverse

  def reverse
    "x#{old_reverse}x"
  end

end

"abc".reverse # => "xcbax"

# For more information: http://www.pragprog.com/titles/ppmetr/metaprogramming-ruby