class String  def to_snake! # no one should change these unless they can benchmark and prove their way is faster. =)    @cached_snake_strings ||= {}    @cached_snake_strings[self] ||= (      while x = index(/([a-z\d])([A-Z])/) # unfortunately have to use regex for this one        y=x+1        self[x..y] = self[x..x]+"_"+self[y..y].downcase      end      self    )  end    # Aryk: This might be a better way of writing it. I made a lightweight version to use in my modifications. Feel free to adapt this to the rest.  def to_camel! # no one should change these unless they can benchmark and prove their way is faster. =)    @cached_camel_strings ||= {}    @cached_camel_strings[self] ||= (      # new_string = self.dup # need to do this since sometimes the string is frozen      while x = index("_")        y=x+1        self[x..y] = self[y..y].capitalize # in my tests, it was faster than upcase      end      self    )  end    def to_title   title = self.dup   title[0..0] = title[0..0].upcase   title  end  end