From: matz@... (Yukihiro Matsumoto)
Date: 2000-04-08T23:55:18+09:00
Subject: [ruby-talk:02399] Re: Iterator into array

Hi,

In message "[ruby-talk:02384] Re: Iterator into array"
    on 00/04/07, Dave Thomas <Dave@thomases.com> writes:

|Do you ever sleep ;-)

Sometimes.  I slept all day long today.  I've got a cold.  Don't stay
up too late, kids. ;-)

|  def fibUpTo(max)
|    i1, i2 = 1, 1
|    while i1 <= max
|      yield i1
|      i1, i2 = i2, i1+i2
|    end
|  end
|
|  fibUpTo(20)   ->  [1,1,2,3,5,8,13]

But fibUpTo() has its return value, which happens to be meaningless
for this method, other than yielded values.  So it may be better that: 

  fibUpTo(20)   ->  nil/[1,1,2,3,5,8,13]

In addition, not all blocks are used for iteration.  For example,
how do you think the following should be documented?

  [4,2,4,5].sort  -> [2,4,4,5]/[[4, 4],[4, 5],[2, 4],[4, 2]]?

							matz.