In message "[ruby-talk:01074] Re: rand() / drand48()"
    on 00/01/08, GOTO Kentaro <gotoken / math.sci.hokudai.ac.jp> writes:

|Sorry for my unclear words.  I agree your patch now, but you should
|document the difference from the previous one.  For rand() family
|user, the current behavior is strange a little.

Modified like this:
   
  rand(max)

      Returns a random integer number greater than or equal to 0 and
      less than the value of max. (max should be positive.)
      Automatically calls srand unless srand() has already been
      called.

      If max is 0, rand returns a random float number greater than or
      equal to 0 and less than 1.