Spell: Prepended Wrapper

prepended_wrapper.rb

# ========================
# Spell: Prepended Wrapper
# ========================

# Call a method from its prepended override.

module M
  def reverse
    "x#{super}x"
  end
end

String.class_eval do
  prepend M
end

"abc".reverse # => "xcbax"

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