Object#maybe - A (crude?) implementation of the Maybe monad in Ruby

maybe.rb

class BlankSlate
  instance_methods.each { |m| undef_method m unless m =~ /^__/ }
end

class MaybeProxy < BlankSlate
  attr_reader :obj

  def initialize(obj)
    @obj = obj
  end

  def method_missing(meth, *args, &blk)
    MaybeProxy.new(obj.try(meth, *args, &blk))
  end
end

class Object
  def maybe(&blk)
    (yield MaybeProxy.new(self)).obj
  end

  def try(method, *args, &block)
    send(method, *args, &block) if respond_to?(method)
  end
end