From: Ralph Shnelvar <ralphs@...32.com>
Date: 2010-10-03T08:41:12+09:00
Subject: Pass by reference and copy on write

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I see
  http://www.ruby-forum.com/topic/41160

which has a fairly long explanation of passing stuff by reference and copy on write(cow).


Let's say I have
  def som_func(x,y)
   x = 24
   y = 42
  end
  .
  .

  a=1
  b=2
  .
  .
  .
  some_func(a,b)


and I want to have some_func change a to 24 and b to 42 ...

How do I do it?


Is there a good write-up on copy on write and how to change the values of parameters?
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