From: "Bartosz Dziewoński" <matma.rex@...>
Date: 2012-04-04T03:26:28+09:00
Subject: Re: fibonacci and defining variables

W dniu 3 kwietnia 2012 19:29 użytkownik Christopher D.
<lists@ruby-forum.com> napisał:
>    i, p = p, i+p

Here, the variables are assigned "at the same time" - first, values on
right-hand-side are computed ("p" and "i+p"), and then these values
are assigned to "i" and "p" variables, respectively.


>    i = p
>    p = i+p
>  end

In this case, the assignments are "sequential" - value of "p" is
assigned to "i", and then values of "i+p" is assigned to "p". Since
"i" has changed in the meantime (!) to be equal to "p", this code
gives different results (essentially doubling "p" on each iteration).

-- Matma Rex